Structure of 31785-05-4
*Storage: {[sel_prStorage]}
*Shipping: {[sel_prShipping]}
The BI-3802 was designed by Boehringer Ingelheim and could be obtained free of charge through the Boehringer Ingelheim open innovation portal opnMe.com, associated with its negative control.
4.5
*For Research Use Only !
Change View
Size | Price | VIP Price | US Stock |
Global Stock |
In Stock | ||
{[ item.pr_size ]} |
Inquiry
{[ getRatePrice(item.pr_usd, 1,1,item.pr_is_large_size_no_price, item.pr_usd) ]} {[ getRatePrice(item.pr_usd,item.pr_rate,1,item.pr_is_large_size_no_price, item.discount_usd) ]} {[ getRatePrice(item.pr_usd, 1,1,item.pr_is_large_size_no_price, item.pr_usd) ]} |
Inquiry {[ getRatePrice(item.pr_usd,item.pr_rate,item.mem_rate,item.pr_is_large_size_no_price, item.vip_usd) ]} | Inquiry {[ item.pr_usastock ]} In Stock Inquiry - | {[ item.pr_chinastock ]} {[ item.pr_remark ]} In Stock 1-2 weeks - Inquiry - | Login | - + | Inquiry |
Please Login or Create an Account to: See VIP prices and availability
US Stock: ship in 0-1 business day
Global Stock: ship in 5-7 days
1-2weeks
Inquiry
{[ getRatePrice(item.pr_usd,item.pr_rate,item.mem_rate,item.pr_is_large_size_no_price, item.vip_usd) ]}
{[ getRatePrice(item.pr_usd, 1,1,item.pr_is_large_size_no_price, item.pr_usd) ]}
{[ getRatePrice(item.pr_usd,1,item.mem_rate,item.pr_is_large_size_no_price, item.pr_usd) ]}
Inquiry
{[ getRatePrice(item.pr_usd,item.pr_rate,1,item.pr_is_large_size_no_price, item.vip_usd) ]}
{[ getRatePrice(item.pr_usd, 1,1,item.pr_is_large_size_no_price, item.pr_usd) ]}
{[ getRatePrice(item.pr_usd, 1,1,item.pr_is_large_size_no_price, item.pr_usd) ]}
In Stock
- +
Please Login or Create an Account to: See VIP prices and availability
US Stock: ship in 0-1 business day
Global Stock: ship in 2 weeks
Search for reports by entering the product batch number.
Batch number can be found on the product's label following the word 'Batch'.
Search for reports by entering the product batch number.
Batch number can be found on the product's label following the word 'Batch'.
Search for reports by entering the product batch number.
Batch number can be found on the product's label following the word 'Batch'.
Search for reports by entering the product batch number.
Batch number can be found on the product's label following the word 'Batch'.
Search for reports by entering the product batch number.
Batch number can be found on the product's label following the word 'Batch'.
CAS No. : | 31785-05-4 |
Formula : | C7H10N2O2S |
M.W : | 186.23 |
SMILES Code : | CCOC(=O)C1=C(N)SC(C)=N1 |
MDL No. : | MFCD07357418 |
InChI Key : | HNDBOQZBZYRXMF-UHFFFAOYSA-N |
Pubchem ID : | 13329095 |
GHS Pictogram: |
![]() |
Signal Word: | Warning |
Hazard Statements: | H302 |
Precautionary Statements: | P280-P305+P351+P338 |
Num. heavy atoms | 12 |
Num. arom. heavy atoms | 5 |
Fraction Csp3 | 0.43 |
Num. rotatable bonds | 3 |
Num. H-bond acceptors | 3.0 |
Num. H-bond donors | 1.0 |
Molar Refractivity | 47.57 |
TPSA ? Topological Polar Surface Area: Calculated from |
93.45 Ų |
Log Po/w (iLOGP)? iLOGP: in-house physics-based method implemented from |
2.1 |
Log Po/w (XLOGP3)? XLOGP3: Atomistic and knowledge-based method calculated by |
2.11 |
Log Po/w (WLOGP)? WLOGP: Atomistic method implemented from |
1.22 |
Log Po/w (MLOGP)? MLOGP: Topological method implemented from |
-0.21 |
Log Po/w (SILICOS-IT)? SILICOS-IT: Hybrid fragmental/topological method calculated by |
1.95 |
Consensus Log Po/w? Consensus Log Po/w: Average of all five predictions |
1.43 |
Log S (ESOL):? ESOL: Topological method implemented from |
-2.43 |
Solubility | 0.685 mg/ml ; 0.00368 mol/l |
Class? Solubility class: Log S scale |
Soluble |
Log S (Ali)? Ali: Topological method implemented from |
-3.7 |
Solubility | 0.0369 mg/ml ; 0.000198 mol/l |
Class? Solubility class: Log S scale |
Soluble |
Log S (SILICOS-IT)? SILICOS-IT: Fragmental method calculated by |
-1.8 |
Solubility | 2.92 mg/ml ; 0.0157 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) |
Yes |
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 |
-5.94 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 |
0.0 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) |
2.75 |
* 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 |
---|---|---|
96% | With lithium hydroxide; In water; dimethyl sulfoxide; at 50℃; for 3h; | Add a solution of <strong>[31785-05-4]ethyl 5-amino-2-methylthiazole-4-carboxylate</strong> (120g; 645 mmol) and 2-fluoronitrobenzene (68 mL; 645 mmol) in dimethylsulphoxide [(1L)] to a 2L 3-necked RB flask equipped with reflux condenser, thermometer, mechanical stirrer. Add lithium hydroxide monohydrate (54 g; 1290 mmol) to the solution and heat at [50C] for 3 hours under nitrogen. Cool the purple solution and pour onto ice/water, allow to stir for one hour, filter and wash with water, dry at [50C] under reduced pressure to give 190 g (96%) as an orange solid: mass spectrum (m/e): 308 (M+1) [; 1HNMR (300MHZ, DMSO-D6,] ppm): [8] 1.25 (tr, 3H), 2.56 (s, 3H), 4.25 (q, 2H), 7.20 (m, [1H),] 7.78 (m, 2H), 8.20 (d, 1H), 11.42 (s, 1H, NH). [13CNMR] (75MHz, DMSO, ppm): [5] 24.4, 29.2, 71.2, 127.8, 132.5, 132.8, 137.8, 146.5, 147.0, 147.5, 160.2, 161.5, 173.7. Formula : C13H13N3O4S. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
65% | Add acetoamidocyanoacetate [(1000G,] 5. 88 mol) to a 22L 3-necked RB flask equipped with reflux condenser, thermometer, mechanical stirrer then add toluene [(12L).] Add to this suspension at RT Lawesson's reagent [(1187G,] 2. 93mol). Stir the resulting yellow slurry at [70C] for 16 h, cool to RT. Pour the top yellow solution away from the gummy material on the bottom of the flask into a separation funnel. Add IN [HC1] solution (2. 5L) and TBEA (2. [5L)] and stir the mixture. [AFTERL 5] min. , combine the bi-phase solution was into the toluene, solution in the funnel. Gummy material maybe left in the flask. Repeat the above procedure again. Separate the aqueous and wash the combine organic solution with IN [HC1] (2 x 2. [5L).] Separate the organic layer and combine the aqueous and basify with 2N KOH solution. Add ethyl acetate (3 x 4L) and extract the product. Combine the organic layer, dry over anhydrous sodium sulfate, and evaporate to give 552 g as a pale yellow solid. Dissolve the remaining gummy in methanol [(1L)] and evaporate to dryness. Add MTBE (2. 5L) and IN [HC1] (4L) and stir the mixture. After 15 min., separate the organic layer and basify the aqueous with 2N KOH solution Extract the product with ethyl acetate (2 x 2L). Combine the organic layers and dry over anhydrous sodium sulfate and evaporate to give 165 g as a pale yellow solid. (Total: 717 g, 65%). Mass spectrum (m/e): 187 (M+1) [;'HNMR (300MHZ, DMSO-D6, PPM)] : 8 [1.] [21] (t, 3H), 2.38 (s, 3H), 4.21 (q, 2H), 7.21 (bs, [2H). L3CNMR] (75MHz, DMSO, ppm): [8] 15.1, 19.2, 59.8, 119.3, 145.6, 161.7, 164.1. Formula: [C7H1ON202S. | |
57% | With Lawessons reagent; In toluene; for 18h;Heating / reflux; | To a solution of acetylamino-cyano-acetic acid ethyl ester (27.2 g, 0.160 mol) in anhydrous toluene (300 mL) was added Lawesson's reagent (32.0 g, 0.079 mol) and the resulting mixture heated at reflux for 18 h. The resulting yellow suspension was partitioned between an aqueous solution of HCl (1 M) and tert-butyl methyl ether. The layers were separated and the organic layer extracted with an aqueous solution of HCl (1 M). The combined aqueous layers was basified to pH 10 with an aqueous solution of NaOH (2 M), then extracted with EtOAc. The organic layer was isolated, dried (Na2SO4) and concentrated in vacuo to give the title compound as a pale yellow solid (17.0 g, 57 %). [M + H]+ 187.0 |
50.5% | With Lawessons reagent; In toluene; at 110℃; for 22h; | EXAMPLE 101; 2-Methyl-5-(pyridin-3-ylamino)-thiazole-4-carboxylic acid (3-chloro-phenyl)-amide; The title compound was prepared as illustrated in schemes 2 and 3. A) A suspension of 2-acetylamino-cyanoacetic acid ethyl ester (1.70 g, 10.00 mmol) and 2,4-bis(4-methoxyphenyl)-1,3,2,4-dithiadiphosphetane 2,4-disulfide (Lawesson's reagent) (2.02 g, 5.00 mmol) in toluene (25.00 ml) was heated under argon to 110 C. and stirred for 22 h. The solvent was then evaporated, and the residue purified by flash chromatography (heptane/ethyl acetate 1:1) to yield 5-amino-2-methyl-thiazole-4-carboxylic acid ethyl ester (0.94 g, 50.5%) as a yellow solid |
50% | With Lawessons reagent; In toluene; for 24h;Heating / reflux; | Example 252; 2-Methvl-5-ureido-thiazole-4-carboxylic acid azepan-3-ylamide; ethyl 5-amino-2-methyl-1,3-thiazole-4-carboxylate. ; To a stirred solution of ethyl N-acetyl-3- nitriloalaninate (1.0 eq) in dry toluene (40 mL) was added Lawesson's reagent (0.5 eq) and the resulting mixture was heated to reflux for 24 h. The mixture was diluted with EtOAc and the organic extracts were washed with H20, brine and dried (MgS04). Evaporation of the solvents gave a brown oil. Purification by Gilson (5%-95% MeCN-H2O) afforded the title compound as yellow solid (50%). LC/MS (ES, M+H=187). |
10% | With Lawessons reagent; In toluene; at 80℃; | Ethyl 2-amino-2-cyanoacetate, p-toluenesulfonate salt (1 g, 3.34 mmol) was free- based by dissolving it in lOmL saturated aqueous sodium bicarbonate, then extracting with dichloromethane (3 x 10 ml). The combined dichloromethane layers were dried overs sodium sulfate, filtered and concentrated to 25mL volume. To this solution was added N,N-dimethylaminopyridine (0.04 1 g, 0.334 mmol), followed by acetic anhydride(0.347 mL, 3.67 mmol). After the stirring lh at room temperature, the reaction mixture was quenched with 5 ml of sat. aq. sodium bicarbonate, and 5 ml of water. The reaction mixture was extracted with DCM (3 x 25 ml). The combined DCM layers were dried over sodium sulfate, filtered and concentrated to afford the crude product, ethyl 2-acetamido- 2-cyanoacetate (0.51 g, 3.00 mmol, 90 % yield) as a yellow solid. A portion of thismaterial (334mg, 1.963 mmol) was then dissolved in toluene (7mL). To this solution was added Lawesson?s reagent (397mg, 0.981 mmol) and the resulting mixture was stirred at 80C overnight. After cooling to room temperature, the reaction mixture was evaporated onto Celite. The material was purified first by 24g silica gel column, eluting with 0-100% EtOAc in hexanes, and then by a second 24g silica gel column purification, eluting with 0-10% MeOH in DCM. Concentration of the pure fractions afforded ethyl 5-amino-2- methylthiazole-4-carboxylate (84a) (35 mg, 0.188 mmol, 10 % yield) as a colorless oil.LC retention time 0.54 mm [Al. MS (E+) m/z: 187 (MHj.?H NMR (400MHz, CHLOROFORM-d) 6.03 - 5.76 (m, 2H), 4.39 (q, J=7.0 Hz, 2H), 2.60 - 2.51 (m, 3H), 1.45 - 1.37 (m, 3H). |
With Lawessons reagent; In toluene; at 70℃; for 16h; | Synthesis of compound 1 (?-amino-?-methyl-thiazole^-carboxylic acid ethyl ester): Acetamidocyanoacetate was dissolved/suspended in toluene (1.2 L), followed by the addition of Lawesson's reagent. The light yellow suspension was heated at 7O C for 16 hours. The reaction mixture was cooled to room temperature. The toluene layer was separated from the gummy material at the bottom and extracted with 1 N HCl (6x500 mL). The combined aqueous layers were basified upon the addition of 2 N NaOH 1.9 L. The water layer was extracted with ethyl acetate (2x1.5 L), dried (Na2SO4), filtered and concentrated in vacuo, yielding crude compound 1 (20 g, 10.7 mmol, purity >99 %).The gummy material was dissolved in methanol (500 mL) and concentrated under reduced pressure. The sticky product was dissolved in TBME (1.0 L) and 1 N HCI (1.5 L). The aqueous layer was basified with 2 N NaOH (1.0 L). The product was extracted with ethyl acetate (1.0 L), dried (Na2SO4), filtered and concentrated in vacuo, yielding compound 1 (50.3 g, 27.0 mmol, purity >99 %). Overall yield 65 % (70.7 g, 38.0 mmol, purity >99 %). | |
EXAMPLE 27; Shown in Scheme 8, the acetamido cyanoester was converted to the requisite thiazole aminoester following literature procedures: Golankiewicz, Bozenna; Januszczyk, Piotr; Gdaniec, Maria; Kosturkiewicz, Zofa Tetrahedron EN; 41(24), 1985, 5989. This thiazole aminoester intermediate was coupled under similar conditions described in the Examples above, with the methoxychlorobiphenyl acid chloride shown in Scheme 8, itself prepared under similar Suzuki conditions also described in the Examples above. The resultant amidobiaryl methyl ether was demethylated with BBr3 under similar conditions described above, and the product was saponified and purified via preparative RPHPLC. 1H NMR (CD3OD, 500 MHz) delta 7.29 (s, 4H), 7.22 (d, IH), 7.02 (d, IH) 6.91 (dd, IH), 3.07 (t, 2H), 2.90 (t, 2H), 2.59 (s, 3H); LCMS m/z 415 (M-I). | ||
1.01 g | With Lawessons reagent; In toluene; at 120℃; | The Lawesson's reagent (2.85 g, 7.05 mmol) was added to a stirred solution of Step 1 intermediate (2.0 g, 11.75 mmol) in dry toluene (25 mL) at RT and the mixture was heated to 120 C overnight. The mixture was cooled to RT and concentrated under reduced pressure. The residue obtained was purified by flash silica gel column chromatography to yield 1.01 g of the product as a solid. lH NMR (300 MHz, DMSO-d6): delta 1.24 (t, = 7.2 Hz, 3H), 2.38 (s, 3H), 4.18 (q, J = 7.2 Hz, 2H), 7.19 (br s, 2H); APCI im/z) 187 (M+H)+. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
99% | In tetrahydrofuran; for 1.08333h; | ethyl 2-methyl-5- (f [ (trichloroacetyl) aminolcarbonyllamino)-1, 3-thiazole-4-carboxylate.; To a stirred solution of ethyl 5-amino-2-methyl-1, 3-thiazole-4-carboxylate (1 equiv) in anhydrous THF (10 mL) was added trichloroacetyl isocyanate (1 eq) slowly over a period of 5 min. After the addition was complete, a precipitate formed and the reaction stirred for an additional lh. The desired product was obtained by filtration (99% yield) as a yellow solid. The product was used in the next step without any further purification. LC/MS (ES, M+H=374). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
39% | With potassium carbonate; In N,N-dimethyl-formamide; at 80℃; | B) 5-Amino-2-methyl-thiazole-4-carboxylic acid ethyl ester (0.200 g, 1.07 mmol) was dissolved in 10 mL dry DMF. Potassium carbonate (0.45 g, 3.26 mmol) and cyclopropyl methylbromide (0.166 g, 1.23 mmol) were added and the reaction mixture was stirred at 80 C. overnight. The reaction mixture was diluted with 100 mL water and extracted three times with ethyl acetate (50 mL each). The organic phases were pooled, dried with sodium sulfate and evaporated. The crude product was flash-chromatographed on silica gel with heptane/ethyl acetate 100:0?0:100 gradient to yield 5-(cyclopropylmethoxycarbonyl-(cyclopropylmethyl)-amino)-2-methyl-thiazole-4-carboxylic acid ethyl ester (140 mg, 39%). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
65% | With caesium carbonate;tris(dibenzylideneacetone)dipalladium(0) chloroform complex; 4,5-bis(diphenylphos4,5-bis(diphenylphosphino)-9,9-dimethylxanthenephino)-9,9-dimethylxanthene; In 1,4-dioxane; at 150℃; for 0.166667h;Microwave irradiation; | B) A Schlenck flask was charged with <strong>[31785-05-4]5-amino-2-methyl-thiazole-4-carboxylic acid ethyl ester</strong> (0.33 g, 1.80 mmol), 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene (Xantphos) (0.15 g, 0.26 mmol) and palladium dibenzylideneacetone (Pd2dba3)-chloroform complex (0.08 g, 0.08 mmol). Degassed dioxane (6.00 ml) was added, followed by 3-bromopyridine (0.23 g, 1.50 mmol). The flask was subjected to 5 cycles of evacuation and backfiring with argon. The reaction mixture was then transferred under argon to a microwave vial containing cesium carbonate (0.84 g, 2.60 mmol). The vial was then irradiated in a microwave oven at 150 C. for 10 min. The mixture was diluted with THF and the solids filtered, washing with THF. The filtrate was evaporated and the residue purified by flash chromatography (ethyl acetate/methanol) to yield 2-methyl-5-(pyridin-3-ylamino)-thiazole-4-carboxylic acid ethyl ester (0.25 g, 65%) as a light yellow solid |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
83% | B) A-amino-2-methyl-thiazole-4-carboxylic acid ethyl ester (0.15 g, 0.806 mmol), cyclopropancarboxaldehyde (0.23 g, 3.29 mmol) was treated with cyclopropanecarboxaldehyde (0.230 g, 3.22 mmol) and tetraisopropyl-orthotitanate (0.916 g, 3.22 mmol) and stirred at room temperature overnight. Ethanol (5 mL) and sodium cyanoborohydride (0.213 g, 3.22 mmol) were added and the reaction mixture was stirred for 5 h. Water (0.5 mL) was added to the reaction mixture and the solvent was evaporated. The residue was purified by flash chromatography on silica gel with ethyl acetate/methanol 100:0?90:10 gradient to yield 5-((cyclopropylmethyl)-amino)-2-methyl-thiazole-4-carboxylic acid isopropyl ester (0.170 g, 83%) as a yellow oil |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
70 - 90% | With dmap; In tetrahydrofuran; at 70 - 100℃; for 0.166667h;Microwave irradiation;Product distribution / selectivity; | EXAMPLE 127; 5-Amino-2-methyl-thiazole-4-carboxylic acid (3-chloro-phenyl)-amide; The title compound was prepared as described in scheme 6. A) A solution of <strong>[31785-05-4]5-amino-2-methyl-thiazole-4-carboxylic acid ethyl ester</strong> (prepared as described in example 105, step A) (0.10 g, 0.54 mmol) in THF (2.5 ml) was treated with dimethylaminopyridine (DMAP) and di-tert-butyl dicarbonate (Boc2O). The mixture was irradiated in a microwave oven at 100 C. for 10 min, then the solvent was evaporated. The residue was purified by flash chromatography (heptane/ethyl acetate) yielding 2-tert-butoxycarbonylamino-5-methyl-thiophene-3-carboxylic acid ethyl ester (0.11 g, 70%) as a yellow oil; B) 5-Amino-2-methyl-thiazole-4-carboxylic acid ethyl ester (0.40 g, 2.15 mmol) was dissolved in 20 ml dry THF. Di-tert.-butyl dicarbonate (0.526 g, 4.41 mmol) and 4-(N,N-dimethylamino)pyridine (0.036 g, 0.3 mmol) were added and the reaction mixture was stirred at 70 C. overnight. The solvent was evaporated, the residue taken up in 20 mL saturated sodium bicarbonate solution and extracted three times with ethyl acetate (30 mL each). The organic phases were pooled, dried with sodium sulfate and evaporated. The crude product was flash-chromatographed on silica gel with heptane/ethyl acetate 100:0?0:100 gradient to yield 5-tert-butoxycarbonylamino-2-methyl-thiazole-4-carboxylic acid ethyl ester as a light yellow solid (0.553 g, 90%) |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
24% | With caesium carbonate;tris(dibenzylideneacetone)dipalladium(0) chloroform complex; 4,5-bis(diphenylphos4,5-bis(diphenylphosphino)-9,9-dimethylxanthenephino)-9,9-dimethylxanthene; In 1,4-dioxane; at 150℃; for 0.25h;Microwave irradiation; | B) A microwave vial was charged with <strong>[31785-05-4]5-amino-2-methyl-thiazole-4-carboxylic acid ethyl ester</strong> (0.300 g, 1.61 mmol), 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene (Xantphos) (0.28 g, 0.48 mmol) and palladium dibenzylideneacetone (Pd2dba3)-chloroform complex (0.17 g, 0.16 mmol). Degassed dioxane (15.00 ml) was added, followed by 3-bromobenzenesulfonamide (0.38 g, 1.61 mmol) and cesium carbonate (0.93 g, 2.87 mmol) The vial was then irradiated in a microwave oven at 150 C. for 15 min. The mixture was diluted with THF and the solids filtered, washing with THF. The filtrate was evaporated and the residue purified by flash chromatography (heptane ethyl acetate) to yield 2-methyl-5-(3-sulfamoyl-phenylamino)-thiazole-4-carboxylic acid ethyl ester (0.13 g, 24%) as an off-white solid |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With hydrogenchloride; In 1,4-dioxane; for 120h;Heating / reflux; | Synthesis of compound 2 (5-amino-2-methylthiazolor5,4-o1pyrimidin-7-ol): <strong>[31785-05-4]5-amino-2-methyl-thiazole-4-carboxylic acid ethyl ester</strong> (compound 1) (31.3 g. 0.168 mol) and cyanamide (17.5 g, 0.416 mol) were dissolved in dioxane (150 ml_, pre-dried using 4 A molecular sieves). In addition, drop wise 4 N HCI in dioxane (200 ml) was added over 15 minutes and the mixture was heated to reflux and vigorously stirred, for 5 days. The volatiles were evaporated to dryness and the crude product (55 g) was used without any further purification in the next step. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
89% | To a solution of <strong>[31785-05-4]5-amino-2-methyl-thiazole-4-carboxylic acid ethyl ester</strong> (15.0 g, 0.081 mol) in DCM (550 mL) was added chlorosulfonyl isocyanate (8.92 mL, 0.102 mol) dropwise at -78 0C. The thick suspension was allowed to warm to RT and stirred for 45 minutes. The resulting precipitate was collected by filtration and dried in vacuo. The resultant white solid was suspended in an aqueous solution of HCl (6 M, 400 mL) and heated at 90 C for 1 h. The resulting solution was cooled to 0 C and pH adjusted to 5 with an aqueous solution of NaOH (6 M). The resultant precipitate was collected by filtration and dried in vacuo at 60 C for 36 h to give the title compound (16.4 g, 89 %). [M + H]+ 230.0 |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
28 mg | Example 22: Compound 52 5-Amino-2-methyl-thiazole-4-carboxylic acid ethyl ester (150mg, 0.806mmol) was dissolved in dichloromethane (3ml_). To this, pyridine (0.195ml_, 2.42mmol) was added at room temperature. To this, benzenesulfonyl chloride (171 mg, 0.967mmol) was added at room temperature and stirred for 16 hours. The mixture was concentrated in vacuo, diluted with water and extracted with ethyl acetate. The organic layer was dried with Na2S04, filtered and concentrated in vacuo to dryness. The residue was dissolved in tetrahydrofuran (3ml_) and water (1 ml_). To this, lithium hydroxide monohydrate (101 mg, 2.41 mmol) was added at room temperature and stirred for 12 hours. The mixture was concentrated in vacuo and diluted with water. The mixture was acidified with 1 N hydrochloric acid solution. The product was collected by filtration, washed with diethyl ether and dried under vacuum to give Compound 52 (28mg). 1 H NMR (DMSO-de) delta: 7.85-7.75 (2H, m), 7.70-7.62 (1 H, m), 7.62-7.54 (2H, m), 2.75 (3H, obs) LCMS (Method 30) Rt 4.63 min; m/z(M-H)" 297 |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
60 mg | Intermediate 50 Sodium hydride (60% disp. in oil; 48mg, 1.21 mmol) was suspended in dry tetrahydrofuran (5ml_) under nitrogen. To this, 5-amino-2-methyl-thiazole-4- carboxylic acid ethyl ester (150mg, 0.806mmol) was added at 0C and the mixture was stirred for 15 minutes. To this, 2,5-dichlorothiophene-3-sulfonyl chloride (243mg, 0.967mmol) was added at 0C and the mixture stirred at room temperature for 4 hours. Water was added to the reaction mixture at 0C and the mixture concentrated in vacuo. The residue was purified by preparative TLC eluting with 100% ethyl acetate to give Intermediate 50 (60mg) as an off white solid. LCMS (Method 33) Rt 1.91 min; m/z(M+H)+ 401 |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
39% | With caesium carbonate; In N,N-dimethyl-formamide; at 50℃; for 7h; | A solution of <strong>[31785-05-4]ethyl 5-amino-2-methylthiazole-4-carboxylate</strong> (1.7 g, 9.0 mmol), 1-bromo-2- methoxyethane (1.2 g, 9.0 mmol) and C52CO3 (4.4 g, 13.5 mmol) in DMF (10 mL) was heatedto 50 C for 7 hours and then cooled to r.t. The crude product was purified by reverse phaseC18 column chromatography (MeCN/H20) to give ethyl 5-((2-methoxyethyl)amino)-2-methylthiazole-4-carboxylate as an orange oil (850 mg, 3.48 mmol, 39%). ESI-MS m/z: 245.2[M+Hj . |
39% | With caesium carbonate; In N,N-dimethyl-formamide; at 50℃; for 7h; | A solution of <strong>[31785-05-4]ethyl 5-amino-2-methylthiazole-4-carboxylate</strong> (1.7 g, 9.0 mmol), 1-bromo-2- methoxyethane (1.2 g, 9.0 mmol) and Cs2CO3 (4.4 g, 13.5 mmol) in DMF (10 mL) was heated to 50C for 7 hours and then cooled to r.t. The crude product was purified by reverse phase C18 column chromatography (MeCN/H2O) to give ethyl 5-((2-methoxyethyl)amino)-2- methylthiazole-4-carboxylate as an orange oil (850 mg, 3.48 mmol, 39%). ESI-MS m/z: 245.2 [M+H]+. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
83% | With tris-(dibenzylideneacetone)dipalladium(0); dicyclohexyl-(2?,4?,6?-triisopropyl-3,6-dimethoxy-[1,1?-biphenyl]-2-yl)phosphine; caesium carbonate; In N,N-dimethyl acetamide; at 115℃;Inert atmosphere; | 6-chloro-N-cyclopropyl-8-((4-methoxybenzyl)(methyl)ammno)imidazo[ 1,2- bjpyridazine-3-carboxamide (id) (44 mg, 0.114 mmol), <strong>[31785-05-4]ethyl 5-amino-2-methylthiazole-4-carboxylate</strong> (84a) (31.9 mg, 0.171 mmol), and BrettPhos (12.24 mg, 0.023 mmol) were added to a flask and that was subsequently flushed with nitrogen. N,Ndimethylacetamide (1 mL) was added and the heterogeneous mixture was sparged with nitrogen for a few minutes. Cesium carbonate (111 mg, 0.342 mmol) and Pd2dba3 (20.88 mg, 0.023 mmol) were added, and the resulting mixture was then heated to 115 Covernight. After cooling to rt, water (15 ml) was added and the resulting mixture was extracted with EtOAc (3 x 40 ml). The combined organic layers were washed with 10% LiC1 (40 ml), brine (40 ml), dried over sodium sulfate. This solution was filtered, concentrated, and purified by flash chromatography eluting with 0-100% EtOAc in hexanes on a 12g column. The clean fractions were concentrated to afford ethyl 5-((3- (cyclopropylcarbamoyl)-8-((4-methoxybenzyl)(methyl)amino)imidazo[ 1 ,2-bj pyridazin-6- yl)amino)-2-methylthiazole-4-carboxylate (84b) (51 mg, 0.095 mmol, 83 % yield) as a tan solid. LC retention time 0.98 mm [Al. MS (E+) m/z: 536 (MH). |
A115563 [18903-18-9]
Ethyl 5-aminothiazole-4-carboxylate
Similarity: 0.86
A202401 [6436-59-5]
Ethyl 2-methylthiazole-4-carboxylate
Similarity: 0.85
A162140 [73956-17-9]
Ethyl 2-formylthiazole-4-carboxylate
Similarity: 0.81
A151543 [921927-88-0]
Methyl 2-formylthiazole-4-carboxylate
Similarity: 0.79
A162858 [911466-96-1]
2-(Ethoxycarbonyl)thiazole-4-carboxylic acid
Similarity: 0.76
A226435 [36405-01-3]
5-Amino-2-methylthiazole-4-carboxylic acid
Similarity: 0.93
A115563 [18903-18-9]
Ethyl 5-aminothiazole-4-carboxylate
Similarity: 0.86
A134830 [72054-60-5]
Ethyl 2-amino-5-methylthiazole-4-carboxylate
Similarity: 0.68
A154853 [96929-05-4]
Ethyl 2-(((tert-butoxycarbonyl)amino)methyl)thiazole-4-carboxylate
Similarity: 0.67
A204395 [118452-04-3]
Methyl 2-aminothiazole-4-carboxylate
Similarity: 0.67
A226435 [36405-01-3]
5-Amino-2-methylthiazole-4-carboxylic acid
Similarity: 0.93
A115563 [18903-18-9]
Ethyl 5-aminothiazole-4-carboxylate
Similarity: 0.86
A202401 [6436-59-5]
Ethyl 2-methylthiazole-4-carboxylate
Similarity: 0.85
A162140 [73956-17-9]
Ethyl 2-formylthiazole-4-carboxylate
Similarity: 0.81
A151543 [921927-88-0]
Methyl 2-formylthiazole-4-carboxylate
Similarity: 0.79