Structure of 20876-36-2
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CAS No. : | 20876-36-2 |
Formula : | C8H8N2O |
M.W : | 148.16 |
SMILES Code : | O=C1NC2=C(C=C(N)C=C2)C1 |
MDL No. : | MFCD02179603 |
InChI Key : | JPUYXUBUJJDJNL-UHFFFAOYSA-N |
Pubchem ID : | 2773213 |
GHS Pictogram: |
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Signal Word: | Warning |
Hazard Statements: | H302 |
Precautionary Statements: | P280-P305+P351+P338 |
Num. heavy atoms | 11 |
Num. arom. heavy atoms | 6 |
Fraction Csp3 | 0.12 |
Num. rotatable bonds | 0 |
Num. H-bond acceptors | 1.0 |
Num. H-bond donors | 2.0 |
Molar Refractivity | 46.14 |
TPSA ? Topological Polar Surface Area: Calculated from |
55.12 Ų |
Log Po/w (iLOGP)? iLOGP: in-house physics-based method implemented from |
1.03 |
Log Po/w (XLOGP3)? XLOGP3: Atomistic and knowledge-based method calculated by |
0.48 |
Log Po/w (WLOGP)? WLOGP: Atomistic method implemented from |
0.2 |
Log Po/w (MLOGP)? MLOGP: Topological method implemented from |
0.52 |
Log Po/w (SILICOS-IT)? SILICOS-IT: Hybrid fragmental/topological method calculated by |
1.14 |
Consensus Log Po/w? Consensus Log Po/w: Average of all five predictions |
0.67 |
Log S (ESOL):? ESOL: Topological method implemented from |
-1.46 |
Solubility | 5.08 mg/ml ; 0.0343 mol/l |
Class? Solubility class: Log S scale |
Very soluble |
Log S (Ali)? Ali: Topological method implemented from |
-1.21 |
Solubility | 9.2 mg/ml ; 0.0621 mol/l |
Class? Solubility class: Log S scale |
Very soluble |
Log S (SILICOS-IT)? SILICOS-IT: Fragmental method calculated by |
-2.51 |
Solubility | 0.459 mg/ml ; 0.0031 mol/l |
Class? Solubility class: Log S scale |
Soluble |
GI absorption? Gatrointestinal absorption: according to the white of the BOILED-Egg |
High |
BBB permeant? BBB permeation: according to the yolk of the BOILED-Egg |
No |
P-gp substrate? P-glycoprotein substrate: SVM model built on 1033 molecules (training set) |
No |
CYP1A2 inhibitor? Cytochrome P450 1A2 inhibitor: SVM model built on 9145 molecules (training set) |
No |
CYP2C19 inhibitor? Cytochrome P450 2C19 inhibitor: SVM model built on 9272 molecules (training set) |
No |
CYP2C9 inhibitor? Cytochrome P450 2C9 inhibitor: SVM model built on 5940 molecules (training set) |
No |
CYP2D6 inhibitor? Cytochrome P450 2D6 inhibitor: SVM model built on 3664 molecules (training set) |
No |
CYP3A4 inhibitor? Cytochrome P450 3A4 inhibitor: SVM model built on 7518 molecules (training set) |
No |
Log Kp (skin permeation)? Skin permeation: QSPR model implemented from |
-6.86 cm/s |
Lipinski? Lipinski (Pfizer) filter: implemented from |
0.0 |
Ghose? Ghose filter: implemented from |
None |
Veber? Veber (GSK) filter: implemented from |
0.0 |
Egan? Egan (Pharmacia) filter: implemented from |
0.0 |
Muegge? Muegge (Bayer) filter: implemented from |
1.0 |
Bioavailability Score? Abbott Bioavailability Score: Probability of F > 10% in rat |
0.55 |
PAINS? Pan Assay Interference Structures: implemented from |
0.0 alert |
Brenk? Structural Alert: implemented from |
1.0 alert: heavy_metal |
Leadlikeness? Leadlikeness: implemented from |
No; 1 violation:MW<1.0 |
Synthetic accessibility? Synthetic accessibility score: from 1 (very easy) to 10 (very difficult) |
1.36 |
* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
100% | With hydrogen;palladium 10% on activated carbon; In tetrahydrofuran; ethanol; at 20℃; under 760.051 Torr; for 1h; | 356 mg of 5-nitro-1,3-dihydro-indol-2-one is hydrogenated in 30 ml of tetrahydrofuran:ethanol=1:1 with 400 mg palladium on carbon (10%) at room temperature and normal pressure for 1 hour. After catalyst is suctioned off on diatomaceous earth and after concentration by evaporation, 320 mg (100% of theory) of 5-amino-1,3-dihydro-indol-2-one is obtained. |
98% | With hydrogen;palladium-carbon; In methanol; ethyl acetate; | Example 159b 5-amino 1,3-dihydro-indol-2-one A mixture of 1.5 g (8.4 mmol) of 5-nitro-1,3-dihydro-indol-2-one, 150 mg of Pd/C 10%, and 50 ml MeOH in 100 ml of EtOAc was placed on Parr hydrogenator and charged with 45 psi of Hydrogen gas. The mixture was shaken for 2 hrs. The mixture was filtered and the solvent was removed in vacuo to yield 5-amino 1,3-dihydro-indol-2-one (1.22 g, 98%): 1H NMR (DMSO-d6): delta3.27 (s, 2H), 4.6 (s, 2H), 6.34 (dd, J1=2 Hz, J2=8.1 Hz, 1H), 6.45 (m, 2H), 9.88 (s, 1 H). APCI-MS: m/z 147 (m-H)-. |
91.9% | To a suspension of 5-nitroindolin-2-one (5 g, 1 eq.) in EtOH(50 mL), activated carbon (1 g) and FeCl3 (1 g) were added.The mixture was heated to 78 C, and stirred for 10 min.Then 80% aqueous solution of hydrazine hydrate (8 eq.)was added dropwise into the reaction mixture in 5 min, theresulting mixture was stirred at 78 C for 8-10 h, thencooled to room temperature. The mixture was filtered to remove residue of activated carbon; the filtrate was concentratedunder vacuum to afford crude product, which waspurified by recrystallization from EtOH (about 15 mL) togive 5-aminoindolin-2-one as a pale yellow solid (yield91.9%). |
84% | With palladium 10% on activated carbon; hydrogen; In ethanol; for 4h; | The commercial 5-nitroindolin-2-one (1.00 g, 5.61 mmol) was hydrogenated in EtOH (70 mL) in the presence of 10% Pd-C (315 mg, 2.97 mmol) for 4 h. Then the catalyst was filtered off through Celite, the Celite rinsed with additional EtOH and the solution was evaporated, to give 17 as a brown solid (698 mg, 4.71 mmol, 84% yield). 1H NMR (CD3OD): delta 3.43 (s, 2H, CH2); 6.63-6.65 (m, 2H, Ar); 6.73-6.74 (m, 1H, Ar) ppm. Anal. (C8H8N2O) Calc%: C 64.85, H 5.44, N 18.91; Found%: C 65.03, H 5.49, N 18.83. |
84% | With palladium 10% on activated carbon; hydrogen; In ethanol; at 20℃; for 4h; | The 5-nitro-2-oxindole 1 (1 .00 g, 5.61 mmol) was hydrogenated in EtOH (70 mL)in the presence of 10% Pd-C (315 mg, 2.97 mmol) for 4h at room temperature.Then the catalyst was filtered off through Celite, the Celite rinsed with additional EtOH and the solution was evaporated, to give 2 as a brown solid (698 mg, 4.71 mmol, 84% yield).1HNMR (400 MHz, DMSO-d6): 6 3.30 (5, 2H, CH2); 4.62 (br s, 2H, NH2); 6.37(dd, 1H, J= 2.2, 8.2 Hz, Ar); 6.48-6.50 (m, 2H, Ar); 9.90 (br s, 1H, NH) ppm.Anal. Calcd for C8H8N20: C, 64.85%; H, 5.44%; N 18.91%; Found: C, 65.03%;H, 5.49%; N, 18.83% |
79% | With hydrogenchloride; zinc; In ethanol; water; for 0.5h; | To the mixture of 5-nitro-2-oxindole 2c (0.5g, 0.003mol) and zinc dust (0.91g, 0.014mol) in ethanol (5mL) 2mL of concentrated hydrochloric acid were rapidly added with intensive stirring. After 30min the reaction was terminated by addition of cold water (3mL). Then solid sodium bicarbonate was carefully added to the reaction mixture to adjust pH 8. Solvent was removed in vacuum and crude product was purified by filtering through silica gel pad (eluent MeOH:EtOAc 1:1). After eluent evaporation in vacuum the 5-amino-2-oxindole 2d was obtained as gray powder with yield 79% (0.35g) and used without additional purification. Mp (exp)=190-195C, mp lit34=212-214C). dH (400MHz, DMSO-d6): 3.31 (2H, s, CH2), 4.64, (1H, br s, NH2) 6.39 (1H, dd, J 8.1, 1.3, CHAr), 6.51 (1H, s, CHAr), 6.53 (1H, d, J 7.6, CHAr), 9.99 (1H, s, NH). |
69% | With hydrogen;palladium on activated charcoal; In acetic acid; under 2068.65 Torr; for 1.5h; | To 250 mL acetic acid was added 7.00 g (39.3 MMOL) 5-nitro-1, 3-dihydro-indol-2-one and 418 mg (0.393 MMOL) palladium on carbon. Exposed the reaction mixture to 40 psi H2 on parr shaker for 1.5 hours. The reaction was filtered through diatameceous earth, and the acetic acid was removed under reduced pressure. Cooled the reaction mixture to 0 C and added 10.0 mL of a 94.5 : 5: 0.5 CHC13 : CH30H: NH40H solution. The solution was loaded onto a silica gel column and purified via chromatography (97.8 : 2.0 : 0.2 CHCI3 : CH30H: NH40H) to give a white solid which was further crystallized using the eluent as the solvent to give 4.06 G (27.2 mmol, 69%) of the title compound as crystalline white needles. C8H9N20 : |
68.9% | With hydrogen;5% Pd(II)/C(eggshell); In acetic acid; at 20℃; | Step 2 5-Amino-1,3-dihydro-indol-2-one 5-Nitro-1,3-dihydro-indol-2-one 30b (3.56 g, 20 mmol) was dissolved in 200 ml of acetic acid under stirring, and added with palladium on activated carbon (1.0 g, 5%) to the solution at room temperature. The reaction mixture was stirred under a hydrogen atmosphere. After thin lay chromatography showed the disappearance of starting materials, the reaction mixture was filtered, and concentrated under reduced pressure to obtain the title compound 5-amino-1,3-dihydro-indol-2-one 30c (2.04 g, yield 68.9%) as a white solid. |
68.9% | With hydrogen;5% Pd(II)/C(eggshell); In acetic acid; at 20℃; | 5-Nitro-1,3-dihydro-indol-2-one 30b (3.56 g, 20 mmol) was dissolved in 200 ml of acetic acid under stirring, and added with palladium on activated carbon (1.0 g, 5%) to the solution at room temperature. The reaction mixture was stirred under a hydrogen atmosphere. After thin lay chromatography showed the disappearance of starting materials, the reaction mixture was filtered, and concentrated under reduced pressure to obtain the title compound 5-amino-1,3-dihydro-indol-2-one 30c (2.04 g, yield 68.9%) as a white solid. MS m/z (ESI): 149.4[M+1] |
60% | palladium; In methanol; | 5-Amino-2-Oxindole 5-Nitro-2-oxindole (6.3 g) was hydrogenated in methanol over 10% palladium on carbon to give 3.0 g (60% yield) of the title compound as a white solid. |
60% | palladium; In methanol; | 5-Nitro-2-oxindole (6.3 g) was hydrogenated in methanol over 10% palladium on carbon to give 3.0 g (60% yield) of 5-amino-2-oxindole as a white solid. |
60% | palladium; In methanol; | 5-Amino-2-oxindole 5-Nitro-2-oxindole (6.3 g) was hydrogenated in methanol over 10% palladium on carbon to give 3.0 g (60% yield) of the title compound as a white solid. |
60% | palladium; In methanol; | 5-Amino-2-oxindole 5-Nitro-2-oxindole (6.3 g) was hydrogenated in methanol over 10% palladium on carbon to give 3.0 g (60% yield) of the title compound as a white solid. |
60% | palladium; In methanol; | (c) Preparation of 5-Amino-2-oxindole. The 5-nitro-2-oxindole (6.3 g) was hydrogenated in methanol over 10% palladium on carbon to give 3.0 g (60% yield) of the title compound as a white solid. |
60% | palladium; In methanol; | 5-Nitro-1,3-dihydro-indol-2-one (6.3 g) was hydrogenated in methanol over 10% palladium on carbon to give 3.0 g (60% yield) of 5-amino-1,3-dihydro-indol-2-one as a white solid. |
60% | With hydrogen;palladium 10% on activated carbon; In methanol; | 5-Amino-2-oxindole 5-Nitro-2-oxindole (6.3 g) was hydrogenated in methanol over 10% palladium on carbon to give 3.0 g (60% yield) of the title compound as a white solid, |
60% | With hydrogen;palladium 10% on activated carbon; In methanol; | 5-Amino-2-oxindole 5-Nitro-2-oxindole (6.3 g) was hydrogenated in methanol over 10% palladium on carbon to give 3.0 g (60% yield) of the title compound as a white solid. |
50% | With hydrogen;palladium 10% on activated carbon; In ISOPROPYLAMIDE; under 2068.65 Torr; for 16h;Parr bottle; | Preparation of 5-amino-oxindole (2) To a solution of 5-nitro-oxindole (25 g) in 120 mL of dimethylacetamide in a Parr bottle was added 10% Pd/C (0.5 g). The mixture was hydrogenated (40 psi H2) for 16 hours. The catalyst was removed by filtration and the filtrate was diluted with ether (2 L) to provide 5-amino-oxindole (10.5 g; 50%). |
50% | With hydrogen;palladium 10% on activated carbon; In ISOPROPYLAMIDE; under 2068.65 Torr; for 16h; | To a solution of 5-nitro-oxindole (25 g) in 120 mL of dimethylacetamide in a Parr bottle was added 10% Pd/C (0.5 g). The mixture was hydrogenated (40 psi H2) for 16 hours. The catalyst was removed by filtration and the filtrate was diluted with ether (2 L) to provide 5-amino-oxindole (10.5 g; 50%). |
With hydrogen;palladium 10% on activated carbon; In methanol; under 2327.23 Torr; for 2h; | A. A suspension of 5-nitroindolin-2-one (2.0 g, 11.13 mmol), and 10% palladium on carbon (500 mg) in methanol (100 mL) was hydrogenated for 2 hours under 45 psi. The reaction mixture was filtered through celite and the resulting cake was washed with methanol. The filtrate was concentrated to afford 5-aminoindolin-2-one as a tan-colored solid (1.6 g). | |
With palladium on activated charcoal; hydrogen; In ethanol; at 20℃; | The derivatives 1 -5 were synthesized following the synthetic procedure reported in scheme 1 of Figure 1 . The 5-nitro-1 ,3-dihydro-2/-/-indol-2-one commercial compound was reduced to the corresponding 5-amino-1 ,3-dihydro-2H-indol-2-one by means of catalytic hydrogenation using Pd/C as a catalyst. The subsequent reaction with the chloro acetyl chloride provided 2-chloro-/V-(2-oxo-2,3-dihydro-1 /-/-indol-5-yl)acetamide which was condensed with the appropriate amine derivative to provide, respectively, 2-[(6,7-dimethoxy-3,4-dihydroisoquinol-2-(1 H)-yl)]-N-(2-oxo-2,3- dihydro-1 H-indol-5-yl)acetamide and 2-[(3,4-dimethoxybenzyl)amino]-/V-(2-oxo- 2,3-dihydro-1 /-/-indol-5-yl)acetamide. Lastly, condensation of the appropriate aromatic carbaldehyde in the presence of pyrrolidine provided the desired products 1 -5. | |
With iron; ammonium chloride; In ethanol; water; for 2h;Reflux; | General procedure: To a suspension of 5-nitro-3-substituted-2-oxindole derivatives 8-12 or commercially available 5-nitroindolin-2-one (1 mmol) in amixture of ethanol and water (10 mL, 4:1 v/v) was added iron powder (560 mg.10 mmol,10 equiv.) and NH4Cl (134 mg, 2.5 mmol,2.5 equiv.). The mixture was refluxed for 2 h, cooled and filteredthrough Celite. The filtrate was diluted with water (5 mL) andextracted with dichloromethane (3 x 10 mL). The combinedorganic layers were washed with water (10 mL) and brine (10 mL),dried over anhydrous Na2SO4 and concentrated under reduced pressure. The crude residue was purified by crystallization withethyl ether. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With sodium carbonate; In ethanol; | EXAMPLE 1 A mixture of 5-aminooxindol (14 g), 29 g of bis(beta-bromoethyl)amine.hydrobromide in 250 ml of ethanol was stirred under reflux for 8 hours and allowed to stand overnight at room temperature. To the mixture was added sodium carbonate (10.1 g) and the mixture was stirred further for 8 hours under reflux. After cooling to room temperature, crystals which precipitated were collected by filtration and recrystallized from a mixture of water and ethanol to give 16 g of 5-(1-piperazinyl)oxindol.hydrobromide. Pale yellow powdery crystal NMR (200 MHz, DMSO-d6) delta: 3.30 (8H, s), 3.47 (2H, s), 6.78 (1H, d, J=8.5 Hz), 6.90 (1H, dd, J=8.5 Hz, 2 Hz), 7.04 (1H, d, J=2 Hz), 8.88 (2H, brs), 10.27 (1H, s) |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
75% | To the above compound (4.139 g, 12.3 mM) dissolved in acetic acid (70 ml) was added portionwise under stirring zinc dust (5.884 g, 90 mM) at 0-5° C. and the mixture was stirred for another 1 h. The mixture was filtered on a pad of celite, the pad washed with ethylacetate, the separated organic layer washed with 5percent sodium bicarbonate solution and brine, dried and evaporated to dryness to give raw 5-amino-2-oxindole in about 75percent yield (1.368 g). | |
Reduction of this compound with 10 equivalents of zinc dust in 80 ml of acetic acid at room temperature for 3h gave 5-amino-2-oxindole in good yields (3 g, 82percent). EI-MS m/z: 148 (100, [M]+), 120 (56, (M-CO)+), 119 (94, (M-CO-H)+), 105 (22, [M-NHCO]+). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
81% | In pyridine; | 5-(4-Methoxycarbonylbenzamido)-2-oxindole A mixture of 82.0 mg <strong>[20876-36-2]5-amino-2-oxindole</strong> and 131.0 mg 4-methoxycarbonylbenzoyl chloride in pyridine was stirred at room temperature for 3 hr and poured into ice water. The precipitate was filtered, washed with water and dried in a vacuum oven to give 138.0 mg of 5-(4-methoxycarbonylbenzamido)-2-oxindole (81percent yield). |
81% | In pyridine; | 5-(4-Methoxycarbonylbenzamido)-2-oxindole A mixture of 82.0 mg <strong>[20876-36-2]5-amino-2-oxindole</strong> and 131.0 mg 4-methoxycarbonylbenzoyl chloride in pyridine was stirred at room temperature for 3 hr and poured into ice water. The precipitate was filtered, washed with water and dried in a vacuum oven to give 138.0 mg of 5-(4-methoxycarbonylbenzamido)-2-oxindole (81percent yield). |
81% | In pyridine; at 20℃; for 3h; | 5-(4-Methoxycarbonylbenzamido)-2-oxindole A mixture of 82.0 mg <strong>[20876-36-2]5-amino-2-oxindole</strong> and 131.0 mg 4-methoxycarbonylbenzoyl chloride in pyridine was stirred at room temperature for 3 hr and poured into ice water.. The precipitate was filtered, washed with water and dried in a vacuum oven to give 138.0 mg of 5-(4-methoxycarbonylbenzamido)-2-oxindole (81percent yield). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
6% | With N-ethyl-N,N-diisopropylamine; In 1,4-dioxane; at 110℃; for 16h; | 153 mg (0.490 MMOL) (5-Bromo-2-chloro-pyrimidin-4-yl)-phenethyl-amine was taken into 500 OL 1,4 dioxane with 140 DL (1.00 MMOL) diisopropylethylamine and 80 mg (0.539 mmol) 5-amino-1, 3-dihydro-indol-2-one. The reaction was allowed to heat to 110 C for sixteen hours. The resulting brown glass was taken into 92.3 : 7: 0.7 CHCI3 : CH30H : NH40H and washed with 1 N sodium hydroxide. The organic layer was dried over magnesium sulfate and evaporated directly onto silica gel. This adsorbed compound was purified via column chromatography (97.8 : 2: 0.2 CHCI3 : CH30H: NH40H) over silica to isolate the major product. During evaporation of the major fractions, a white precipitate is noted. Filtration of this precipitate prior to mLete evaporation afforded the title compound in 6percent yield as a white solid. CZOHBRNSO : MS: 424.2/426. 2 (MH+) ;'H NMR (D6-DMSO) 10.20 (s, 1 H), 9.01 (s, 1 H), 7.93 (s, 1 H), 7.52 (s, 1 H), 7.44 (d, J = 8.4 Hz, 1 H), 7.28-7. 16 (m, 5 H), 6.97 (m, 1 H), 6.65 (d, J=8. 3HZ, 1 H), 3.56 (m, 2 H), 3.31 (s, 2 H), 2.82 (t, J = 7.9 Hz, 2 H) ppm. |
With N-ethyl-N,N-diisopropylamine; In 1,4-dioxane; at 110℃; for 16h; | 153 mg (0.490 mmol) (5-Bromo-2-chloro-pyrimidin-4-yl)-phenethyl-amine was taken into 0.5 mL 1,4 dioxane with 0.14 mL (1.00 mmol) diisopropylethylamine and 80 mg (0.539 MMOL) 5-amino-1, 3-DIHYDRO-INDOL-2-ONE. The reaction was allowed to heat to 110 C for sixteen hours. The resulting brown glass was taken into 92.3 : 7: 0.7 CHCI3 : CH30H: NH40H and washed with 1 N sodium hydroxide. The organic layer was dried over magnesium sulfate and evaporated directly onto silica gel. This adsorbed compound was purified via column chromatography (97.8 : 2: 0.2 CHCI3 : CH30H: NH40H) over silica to isolate the major product.the title compound was isolated as a white solid. c2ohigbrn50 : ms: 424.2/426. 2 (mh+) ;'h nmr (d6-dmso) 10.20 (s, 1 h), 9.01 (s, 1 h), 7.93 (s, 1 h), 7.52 (s, 1 h), 7.44 (d, j = 8.4 hz, 1 h), 7.28-7. 16 (m, 5 h), 6.97 (m, 1 h), 6.65 (d, j=8. 3hz, 1 h), 3.56 (m, 2 h), 3.31 (s, 2 h), 2.82 (t, j=7. 9hz, 2h) ppm. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
88.9% | In ISOPROPYLAMIDE; at 20℃; | In 1 ml of dimethylacetamide, 320 mg of <strong>[20876-36-2]5-amino-1,3-dihydro-indol-2-one</strong> is dissolved and mixed drop by drop with 371 mg (2 mmol) of 2-nitrobenzoyl chloride, whereby a slight heating occurs. After stirring overnight at room temperature, it is concentrated by evaporation in a vacuum, and the residue is taken up in ethyl acetate and water. The suctioning off of an insoluble solid provides 130 mg (21.9percent of theory) of 2-nitro-N-(2-oxo-2,3-dihydro-1H-indol-5-yl)-benzamide. After shaking out, the organic phase is washed, filtered and concentrated by evaporation, and 400 mg (67percent of theory) of 2-nitro-N-(2-oxo-2,3-dihydro-1H-indol-5-yl)-benzamide with a melting point of 265° C. is obtained once more. Similarly produced is also 2-nitro-N-(2-oxo-2,3-dihydro-1H-indol-6-yl)-benzamide with a melting point >300° C. Similarly produced to Stage 2 is 2-amino-N-(indol-2-on-5-yl)benzoic acid amide with a melting point of 219° C. Similarly produced to Stage 2 of this example is 2-amino-N-(indol-2-on-6-yl)benzoic acid amide with a melting point of 230° C. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
In tetrahydrofuran; DMF (N,N-dimethyl-formamide); at 20℃; for 18h; | B. To a solution of <strong>[20876-36-2]5-aminoindolin-2-one</strong> (8.76, 58.79 mmol) in tetrahydrofuran:dimethylformamide (400 mL:60 mL) was added trimethylsilylisocyanate (10.6 mL, 78.68 mmol) dropwise. The reaction mixture was stirred at ambient temperature for 18 hours. A tan-colored solid formed which was isolated by filtration, washed with ether and dried in vacuo to afford 5-ureidoindolin-2-one (8.5 g). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With acetic anhydride; at 90℃; for 3h; | Condensation of oxindoles with quinoline-N-oxides: An oxindole (1.6 mmol) may be taken up in acetic anhydride (10 mL) and a solution of quinoline-N-oxide (0.474 mmol) and 5 mL of acetic anhydride may be added. This solution may then be heated at between 0-150°C for between 1-25 hours. In one variation, the reaction is conducted at about 90 °C for about 3 hours. The resulting solution may then be cooled to room temperature. If a solid is observed upon cooling, the material may be isolated by filtration and washed with a minimal amount of cold MeOH, then dried in vacuo. If no solid is observed upon cooling, the reaction may be diluted with an organic solvent, such as ethyl acetate, washed with brine several times, dried over MgSO4 and concentrated to afford an oil. Purification by preparative HPLC may afford a solid product. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Preparation of 5-(4-Chloro-5-trifluoromethyl-pyrimidin-2-ylamino)-1,3-dihydro-indol-2-one (4) To a solution of 5-trifluoromethyl-2,4-dichloropyrimidine (214.8 g; 0.921 mol) in 1:1 DCE/tBuOH (1.240 L) was added Zinc chloride 1M solution in ether (1 eq; 0.921 L). After 0.5 hour, 5-amino-oxindole (124 g; 0.837 mol) was added followed by triethylamine (129.4 ml; 0.921 mol) keeping temperature at 25° C. The reaction was allowed to stir at room temperature overnight, then was concentrated and the product triturated from methanol as a yellow solid (224.3 g; 82percent). 1H NMR (DMSO-d6, 400 MHz) .box. 3.29 (s, 2H), 6.76 (d, J=7.9 Hz, 2H), 7.39 (d, J=8.3 Hz), 7.51 (br s, 1H), 8.71 (s, 1H), 10.33 (s, 1H), 10.49 (s, 1H), 13C NMR (DMSO-d6, 100 MHz) .box. 177.0, 161.3, 158.7 (br), 140.7, 132.8, 126.9, 123.7 (q, J=268 Hz), 121.0, 118.7, 111.2 (q, J=32 Hz), 109.6, 36.7; HPLC ret. time: 5.759 min. LRMS (M+) 329.1, 331.1. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
77% | With triethylamine; In tetrahydrofuran; at 20℃; | A THF (20 mL) solution of <strong>[20876-36-2]5-aminoindolin-2-one</strong> (200 mg, 1.3 mmol) and di-t-butyl dicarbonate (300 mg, 1.4 mmol) at rt under N2, was treated with Et3N <n="105"/>(0.37 mL, 2.7 mmol). The stirring was continued at rt overnight; the reaction mixture was concentrated under reduced pressure, taken into DCM and washed (H2O 2x, brine). The organic layer was dried (Na2SO4) and concentrated under reduced pressure. Trituration with hexanes provided the title compound as a white solid (260 mg, 77 percent). 1H NMR (400 MHz, CDCl3) delta ppm 7.43 (br. s., 2 H), 7.07 (dd, J=8.84, 1.26 Hz, 1 H), 6.77 (d, J=8.59 Hz, 1 H), 6.39 (br. s., 1 H), 3.52 (s, 2 H), 1.52 (s, 9 H); MS ESI 249.0 (80) [M + H]+, calcd for [C13H16N2O3 + H]+ 249.3. |
71% | With sodium hydroxide; In 1,4-dioxane; water; ethyl acetate; | To a solution of 5-amino oxindole (2 g, 13.5 mmol) in 80 ml of water/dioxane 3:1 was added sodium hydroxide 1N until obtaining pH 10 and then di-t-Butyl pyrocarbonate (3.5 g, 16.2 mmol). The reaction was stirred for 3 h maintaining pH 10. After extraction with 3*10 ml of ethyl acetate, the extracted were dried over sodium sulphate and evaporated obtaining 2.4 g of 5-t-Butoxycarbonylamino oxindole (71percent yield). 1 H-NMR (400 MHz, DMSO, T=45° C.) 1.49 (s, 9H); 3.87 (s, 3H); 6.72 (d, J=8.4 Hz, 1H); 6.86 (dd, J=2.2 Hz, J=8.8 Hz, 1H); 7.12 (dd, J=1.8 Hz, J=8.4 Hz, 1H); 7.40 (d, J=8.8 Hz, 1H); 7.54 (d, J=2.2 Hz, 1H); 7.78 (d, J=1.8 Hz, 1H); 7.92 (s, 1H); 8.87 (bs, 1H); 9.38 (s, 1H); 10.25 (s, 1H); 11.8 (bs, 1H). FD-MS: 248 (100, [M]+); 191 (18, M-C4 H9!+); 147 (5, M-(CH3)3[COCO]+) |
With triethylamine; In tetrahydrofuran; at 20℃; for 24h; | Part 1: tert-Butyl 2-oxo-2,3-dihydro-1H-indol-5-ylcarbamate (21): To a mixture of <strong>[20876-36-2]5-amino-1,3-dihydro-2H-indol-2-one</strong> (148 mg, 11.0 mmol), di-tert-butyl dicarbonate (262 mg, 1.2 mmol), and Et3N (279 muL, 2.0 mmol) was added dry THF (5 mL). The suspension was then stirred at rt for 24 h. The reaction was concentrated in vacuo to yield tert-butyl 2-oxo-2,3-dihydro-1H-indol-5-ylcarbamate as a brown solid. 1H NMR (CDCl3, 400 MHz): delta 1.52 (s, 9H), 3.52 (s, 2H), 6.38 (brs, 1H), 6.76 (d, J=8.0 Hz, 1H), 7.07 (dd, J=2.4, 8.4 Hz, 1H), 7.26 (d, J=2.4 Hz, 1H), 7.42 (brs, 1H). MS (ES+): m/z 249 [M+1]. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
25% | In ethanol; | 3-(1H-indol-2-ylmethylene)-5-[(1H-indol-2-ylmethylene)-amino]-1,3-dihydro-indol-2-one A mixture of <strong>[20876-36-2]5-amino-2-oxindole</strong> (74 mg) (prepared as described in Compound IN-009), indole-2-carbaldehyde (87 mg) (prepared according to Synthetic Communications, 1983, 23, 3109) and piperidine (4 mg) in ethanol (2 mL) was heated in a sealed tube at 95° C. for 3 hours. The mixture was cooled to room temperature. The solid was collected by vacuum filtration, washed with cold ethanol and dried in vacuum oven for overnight. The crude solid was then chromatographed on a column of silica gel to give 50 mg (25percent yield) of 3-(1H-indol-2-ylmethylene)-5-[(1H-indol-2-ylmethylene)-amino]-1,3-dihydro-indol-2-one |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
82% | With zinc; In water; acetic acid; ethyl acetate; tert-butyl alcohol; | EXAMPLE 6 Preparation of FCE 28901 To a stirred solution of 5-nitroindole (4 g, 24.6 mmol) in 200 ml of t-Butanol was added, portionwise, pirydinium bromide perbromide (30 g, 93 mmol) over a period of 0.5 h. The reaction mixture was stirred at room temperature overnight, then t-Butanol was removed and the resulting residue dissolved in ethyl acetate/water (500/500 ml). The organic layer was separated and the aqueous layer was extracted with 300 ml of ethyl acetate. The organic extracts were washed with water, dried over sodium sulphate anhydrous and concentrated in vacuo to give 8.5 g of a less polar compound that was recrystallized from ethyl acetate to give 7.5 g of dibromoderivative. Hydrogenation of this compound with 10 equivalents of zinc dust in 80 ml of acetic acid at room temperature for 3 h gave 5-amino oxindole in good yields (3 g, 82percent yield). EI-MS: m/z 148 (100, [M]+); 120 (56, [M-CO]+); 119 (94, [M-CO--H]+); 105 (22, [M-HNCO]+) |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
46% | In water; acetic anhydride; | Example 159c N-(2-oxo-2,3-dihydro-1H-indol-5-yl)-acetamide A mixture of 200 mg (1.35 mmol) of 5-amino 1,3-dihydro-indol-2-one in 6 ml of acetic anhydride was refluxed for 30 minutes. The reaction mixture was poured onto 50 g of crushed ice. The mixture was stirred well and the solid was collected by vacuum filtration. The solid was washed with 200 ml of H2O and air dried to yield N-(2-oxo-2,3-dihydro-1H-indol-5-yl)-acetamide (119 mg, 46percent): 1H NMR (DMSO-d6): delta1.97 (s, 3H), 3.41 (s, 2H), 6.68 (d, J=8.4 Hz, 1H),), 7.26 (dd, J1=2 Hz, J2=8.4 Hz, 1H), 7.46 (d, J=2 Hz, 1H), 9.73 (s, 1H). 10.23 (s, 1H), ESI-MS: m/z 189 (m-H)-. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
89% | With triethylamine; In tetrahydrofuran; at -30 - 20℃; | 5-Amino-1,3-dihydro-indol-2-one 30c (3.5 g, 23.6 mmol) was dissolved in 20 ml of tetrahydrofuran under stirring, and added with triethylamine (3.6 ml, 26 mmol) to the solution at room temperature. Upon completion of the addition, the mixture was cooled down to -30° C. in a dry ice-acetone bath, and added slowly with acetyl chloride (1.8 ml, 24.8 mmol) while maintaining the temperature below -20° C. Upon completion of the addition, the dry ice-acetone bath was removed, and the reaction mixture was allowed to warm up to room temperature and stirred for 20 minutes.After thin lay chromatography showed the disappearance of starting materials, the reaction mixture was added with ethyl acetate (20 ml), gray solids were formed and filtered. The filter cake was washed with water (70 ml.x.3) to obtain 2.5 g of solids. The filtrate was extracted with ethyl acetate (200 ml.x.3). The combined organic extracts were concentrated under reduced pressure, combined with the above solids to obtain the title compound N-(2-oxo-2,3-dihydro-1H-indol-5-yl)-acetamide 30d (4.0 g, yield 89percent) as a gray solid.MS m/z (ESI): 191.2 [M+1] |
89% | With triethylamine; In tetrahydrofuran; at -30 - 20℃; | 5-Amino-1,3-dihydro-indol-2-one 30c (3.5 g, 23.6 mmol) was dissolved in 20 ml of tetrahydrofuran under stirring, and added with triethylamine (3.6 ml, 26 mmol) to the solution at room temperature. Upon completion of the addition, the mixture was cooled down to -30°C in a dry ice-acetone bath, and added slowly with acetyl chloride (1.8 ml, 24.8 mmol) while maintaining the temperature below -20°C. Upon completion of the addition, the dry ice-acetone bath was removed, and the reaction mixture was allowed to warm up to room temperature and stirred for 20 minutes. After thin lay chromatography showed the disappearance of starting materials, the reaction mixture was added with ethyl acetate (20 ml), gray solids were formed and filtered. The filter cake was washed with water (70 ml.x.3) to obtain 2.5 g of solids. The filtrate was extracted with ethyl acetate (200 ml.x.3). The combined organic extracts were concentrated under reduced pressure, combined with the above solids to obtain the title compound N-(2-oxo-2,3-dihydro-1H-indol-5-yl)-acetamide 30d (4.0 g, yield 89percent) as a gray solid. MS m/z (ESI): 191.2[M+1] |
88.9% | With triethylamine; In tetrahydrofuran; at -30 - 20℃; | A stirred solution of <strong>[20876-36-2]5-amino-1,3-dihydro-indol-2-one</strong> (3.5 g, 23.6 mmol, prepared according to U.S. Pat. No. 6,114,371) in 20 ml of tetrahydrofuran was added with triethylamine (1.3 ml, 9 mmol). The solution was cooled down to -30° C. in an acetone-dry ice bath and added with acetyl chloride (1.3 ml, 9 mmol) dropwise. Upon the completion of the addition, the resulting mixture was stirred for 20 minutes at room temperature and added with ethyl acetate (20 ml) until precipitate was formed. The solid was filtered, washed with water (50 ml.x.3) and dried in vacuo to give N-(2-oxo-2,3-dihydro-1H-indol-5-yl)-acetamide (4 g, 88.9percent) as a white solid.MS m/z (ESI): 191 [M+1]. |
88.9% | With triethylamine; In tetrahydrofuran; at -30 - 20℃; for 0.333333h; | A stirred solution of 5-amino-l,3-dihydro-indol-2-one (3.5 g, 23.6 mmol, prepared according to US6114371) in 20 ml of tetrahydrofuran was added with tirethylamine (1,3 ml, 9 mmol). The solution was cooled down to -30°C in an acetone-dry ice bath and added with acetyl chloride (1.3 ml, 9 mmol) drop wise. Upon the completion of the addition, the resulting mixture was stirred for 20 minutes at room temperature and added with ethyl acetate (20 ml) until precipitate was formed. The solid was filtered, washed with water (50 mix 3) and dried in vacuo to give N-(2-oxo-2,3-dihydro-lH-indol-5-yl)-acetamide (4 g, 88.9percent) as a white solid. MS m/z (ESI) : 191[MH-I]. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
90% | With triethylamine; In dichloromethane; at -30 - 45℃; | A stirred solution of <strong>[20876-36-2]5-amino-1,3-dihydro-indol-2-one</strong> (2 g, 13.5 mmol, prepared according to U.S. Pat. No. 6,114,371) in 30 ml of dichloromethane was added with triethylamine (1.9 ml). The solution was cooled down to -30° C. in an acetone-dry ice bath and added with methanesulfonyl chloride (1 ml, 13.5 mmol) dropwise. Upon the completion of the addition, the resulting mixture was heated at 45° C. for 1 hour until precipitate was formed. The solid was filtered, washed with water (50 ml.x.3) and dried in vacuo to give N-(2-oxo-2,3-dihydro-1H-indol-5-yl)-methanesulfonamide (2.7 g, 90percent) as a white solid.MS m/z (ESI): 225 [M-1] |
90% | With triethylamine; In dichloromethane; at -30 - 45℃; for 1h; | A stirred solution of 5-amino-l,3-dihydro-indol-2-one (2 g, 13.5 mmol, prepared according to US6114371) in 30 ml of dichloromethane was added with tirethylamine (1.9 ml). The solution was cooled down to -30°C in an acetone-dry ice bath and added with methanesulfonyl chloride (1 ml, 13.5 mmol) dropwise . Upon the completion of the addition, the resulting mixture was heated at 450C for 1 hour until precipitate was formed. The solid was filtered, washed with water (50 ml x3) and dried in vacuo to give N-(2-oxo-2,3-dihydro-lH-indol-5-yl)-methanesulfonamide (2.7 g, 90percent) as a white solid. MS m/z (ESI) : 225 [M-I] |
38% | In water; at 20℃; | To a stirred solution of <strong>[20876-36-2]5-amino-2-oxindole</strong> 17 (148 mg, 1.00 mmol) in H2O (10 mL) was added MsCl (137 mg, 1.2 mmol) at RT; stirring was continued at room temperature until TLC analysis shows disappearance of the starting material. Then the solution was evaporated to dryness. The residual material was diluted with MeOH and the solid product was filtered out from the mixture, washed with Et2O, and air dried. (19). (86 mg, 0.38 mmol, 38percent yield): mp 196-198 °C. 1H NMR: delta 2.88 (s, 3H, Me); 3.47 (s, 2H, CH2); 6.77 (d, 1H, J = 8.2 Hz, Ar); 7.04 (d, 1H, J = 8.2 Hz, Ar); 7.09 (s, 1H, Ar); 9.37 (br s, 1H); 10.37 (br s, 1H, NH) ppm. 13C NMR: delta 169.74, 135.61, 133.17, 131.18, 126.85, 123.51, 114.84, 112.82, 40.73, 37.41 ppm. Anal. (C9H10N2O3S) Calcpercent: C 47.78, H 4.45, N 12.38, S 14.17; Foundpercent: C 47.91, H 4.68, N 12.51, S 14.28. |
13% | With dmap; In N,N-dimethyl-formamide; at 20℃; for 16h; | To <strong>[20876-36-2]5-aminoindolin-2-one</strong> (50 mg, 0.34 mmol) in DMF (1 mL) was added methanesulfonyl chloride (51 mg, 0.51 mmol) and DMAP (1 mg). The solution was stirred at rt for 16h and the product was precipitated with ether, filtered and dried to give 10 mg, 13percent of a yellow solid. 1H NMR (400 MHz, CD3OD) delta 7.22 (s, IH), 7.13 (d, J = 8.3 Hz, IH), 6.87 (d, J = 7.6 Hz, IH), 3.55 (s, 2H), 2.91 (s, 3H). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
87.2% | With pyridine; In tetrahydrofuran; N,N-dimethyl acetamide; at 0℃; for 1h; | Example 169; N-(2-Oxo-2,3-dihydro-1H-indol-5-yl)-4-(4-phenyl-1,3-thiazol-2-yl)piperazine-1-carboxamide; (1) 2,2,2-Trichloroethyl (2-oxo-2,3-dihydro-1H-indol-5-yl)carbamate; To a solution of <strong>[20876-36-2]5-amino-1,3-dihydro-2H-indol-2-one</strong> (1.00 g, 6.75 mmol) and pyridine (1.64 ml, 20.3 mmol) in N,N-dimethylacetamide (6 ml) and tetrahydrofuran (50 ml) was added 2,2,2-trichloroethyl chloroformate (1.40 ml, 10.2 mmol) with ice-cooling, the mixture was stirred for 1 hour with ice-cooling, the reaction mixture was poured into water and the mixture was extracted with ethyl acetate. The extract was washed with water and dried over anhydrous magnesium sulfate and the solvent was distilled off under reduced pressure to obtain the desired product (1.90 g, 87.2percent) as a solid. 1H-NMR (DMSO-d6) delta; 3.46 (2H, s), 4.92 (2H, s), 6.74 (1H, d, J = 8.1 Hz), 7.27 (1H, d, J = 8.1 Hz), 7.38 (1H, s), 9.96 (1H, s), 10.29 (1H, s). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With hydrogenchloride; In ethanol; butan-1-ol; at 160℃; | iV-Methyl-3-(2-(2-oxoindolin-5-ylamino)-5-(trifluoromethyl)pyridin-4- ylamino)picolinamide; To a high pressure vial was added 3-(2-chloro-5-(trifluoromethyl)pyridin-4-ylamino)- N-methylpicolinamide (0.205 g, 0.62 mmol) and <strong>[20876-36-2]5-aminoindolin-2-one</strong> (0.138 g, 1.2 eq) and n-BuOH (5 mL). HCl (-1.25M HCl in ethanol, 0.5 mL, 1.0 eq) was added to the above mixture. The vial was sealed and heated at 160 °C with stirring overnight in an oil bath. The mixture was cooled to room temperature and concentrated under reduced pressure to obtain the crude. The crude was dissolved in EtOAc and washed with saturated NaHCO3 solution. The organic layers were concentrated and the crude was purified by silica gel chromatography (20percent~100percent EtO Ac/Hex). The product was precipitated from EtOAc and filtered to obtain the desired product as the free base (isolated yield 56percent). The product was converted to the HCl salt. 1H NMR (400 MHz, DMSO-d6> HCl-salt) delta 11.25 (s, 1H), 10.37 (s, 1H), 9.77 (br s, 1H), 9.09 (q, J= 4.7 Hz, 1H), 8.30 (dd, J= 1.2, 4.4 Hz, 1H), 8.28 (s, 1H), 8.11 (dd, J = 1.2, 8.5 Hz, 1H), 7.60 (dd, J= 4.4, 8.5 Hz, 1H), 7.43 (s, 1H), 7.24 (dd, J= 2.1, 8.3 <n="121"/>Hz, 1H), 6.80 (d, J- 8.3 Hz, 1H), 6.77 (s, 1H), 3.49 (s, 2H), 2.81 (d, J= 4.9 Hz, 3H); 19F-NMR (376 MHz, d6-DMSO) delta -59.45 (s, 3F). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
81% | With pyridine; at 20℃; for 3h; | 5-(4-Methoxycarbonylbenzamido)-2-oxindole A mixture of 82.0 mg <strong>[20876-36-2]5-amino-2-oxindole</strong> and 131.0 mg 4-methoxycarbonylbenzoyl chloride in pyridine was stirred at room temperature for 3 hr and poured into ice water. The precipitate was filtered, washed with water and dried in a vacuum oven to give 138.0 mg of 5-(4-methoxycarbonylbemzamido)-2-oxindole (81percent yield). |
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