Structure of Boc-DL-Glu(OBzl)-OH
CAS No.: 117997-81-6
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CAS No. : | 117997-81-6 |
Formula : | C17H23NO6 |
M.W : | 337.37 |
SMILES Code : | O=C(O)C(NC(OC(C)(C)C)=O)CCC(OCC1=CC=CC=C1)=O |
MDL No. : | MFCD00798612 |
InChI Key : | AJDUMMXHVCMISJ-UHFFFAOYSA-N |
Pubchem ID : | 295483 |
GHS Pictogram: |
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Signal Word: | Warning |
Hazard Statements: | H302-H315-H319-H335 |
Precautionary Statements: | P261-P305+P351+P338 |
* 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 |
---|---|---|
94% | With 4-methyl-morpholine; benzotriazol-1-ol; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; In N,N-dimethyl-formamide; at 0 - 20℃; for 27h; | To a solution of <strong>[117997-81-6]Boc-Glu(OBzl)-OH</strong> (0.30 g, 0.90 mmol) and N-Z-1,5-pentanediamine hydrochloride (0.24 g, 0.90 mmol) in DMF (10 mL) at 0 C. were added NMM (0.10 mL, 0.90 mmol), HOBt (0.15 g, 0.99 mmol) and WSC (0.19 g, 0.99 mmol). Z is the protecting group benzyloxycarbonyl. The reaction mixture was stirred for 3 h at 0 C. and for 24 h at room temperature. After DMF was evaporated, the residue was solubilized in EtOAc and washed with citric acid (10%), NaHCO3 (5%), and brine. The organic phase was dried and evaporated to dryness. The residue was crystallized from Et2O/Pe (1:9, v/v): yield 0.47 g (94%); Rf (B) 0.94; HPLC K'=9.15; mp 141-143 C.; [α]20D+20.4; MH+ 556; 1H NMR (DMSO) δ 1.29-1.55 (m, 15 H), 2.18-2.25 (m, 4H), 2.96-3.20 (m, 4H), 4.53-5.34 (m, 5H), 7.11-7.29 (m, 10H). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
41% | (i) Methyl 2-(5-(benzyloxy)-2-(tert-butoxycarbonylamino)-5-oxopentanamido)-5-chlorobenzoateAfter adding 4.0 g (11.9 mmol) of DL-<strong>[117997-81-6]Boc-Glu(OBzl)-OH</strong> to acetonitrile, 2.9 g (35.6 mmol) of N-methyl imidazole and 2.7 g (14.2 mmol) of p-toluene sulfonyl chloride were added and stirring for 1 hour at 0 C. Subsequently, 2.2 g (11.9 mmol) of methyl 2-amino-5-chlorobenzoate was added, and the mixture was stirred at room temperature overnight. After concentration, the reaction mixture was diluted with ethyl acetate, and washed with water. After drying the resulting organic layer over anhydrous sodium sulfate, the solvent was distilled off under reduced pressure. The crude product obtained was separated and purified by silica gel column chromatography to give 2.5 g of methyl 2-(5-(benzyloxy)-2-(tert-butoxycarbonylamino)-5-oxopentanamido)-5-chlorobenzoate (yield 41%).1H-NMR (CDCl3) δ: 1.46 (9H, s), 1.95-2.15 (1H, m), 2.23-2.43 (1H, m), 2.49-2.62 (2H, m), 3.92 (3H, s), 4.26-4.45 (1H, m), 5.13 (2H, s), 5.35 (1H, d, J=8.2 Hz), 7.29-7.42 (5H, m), 7.49 (1H, dd, J=9.2, 2.6 Hz), 8.00 (1H, d, J=2.6 Hz), 8.69 (1H, d, J=9.2 Hz), 11.5 (1H, s). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
94% | To a stirred solution of Boc-L-glutamic acid 5-benzyl ester [4a] (41 g, 122 mmol) in anhydrous CH2Cl2 (45 ml) at O0C, was added during 15 minutes a solution of DCC (30.1 g, 146 mmol) in anhydrous CH2Cl2 (45 ml). The resulting white solid was sonicated. After that, anhydrous aniline was added dropwise to the reaction mixture over 10 minutes at O0C (11.1 ml, 122 mmol). The mixture was stirred at room temperature for 40 minutes and filtered through Celite to remove insoluble material. The resulting liquid was evaporated to dryness and chromatographically purified, yielding the desired product (47.2 g, 94%).1H-NMR (400 MHz, CDCl3): δ: 8.40 (br, IH, CONHPh), 7.43 (d, 2H, J=7.7 Hz, 2Ha), 7.28 (d, 2H, J=7.7 Hz, Hb), 7.20 (m, 5H, 5xHd), 7.02 (t, IH, J=7.4 Hz, Hc), 5.35 (d, IH, J=7.8 Hz, CHNHBoc), 5.04 (d, 2H, J=2.6 Hz, BnOCH2), 4.26 (sa, IH, CH2CHNHBoC), 2.60-2.52 (me, IH, IxOCOCH2CH2), 2.46-2.38 (me, IH, Ix OCOCH2CH2), 2.21-2.12 (me, IH, IxOCOCH2CH2), 1.99-1.90 (me, IH, Ix OCOCH2CH2), 1.40 (s, 9H, MS: Positive mode [M + Na]+ = 435.MS: Negative mode [M + 2 H2O - H]- = 447. | |
94% | Example 1 Preparation of intermediate [6a]: Benzyl 4-(tert-butoxycarbonylamino)-5-oxo-5-(phenylamino) pentanoate To a stirred solution of Boc-L-glutamic acid 5-benzyl ester [4a] (41 g, 122 mmol) in anhydrous CH2Cl2 (45 ml) at 0C, was added during 15 minutes a solution of DCC (30.1 g, 146 mmol) in anhydrous CH2Cl2 (45 ml). The resulting white solid was sonicated. After that, anhydrous aniline was added dropwise to the reaction mixture over 10 minutes at 0C (11.1 ml, 122 mmol). The mixture was stirred at room temperature for 40 minutes and filtered through Celite to remove insoluble material. The resulting liquid was evaporated to dryness and chromatographically purified, yielding the desired product (47.2 g, 94%). 1H-NNM (400 MHz, CDCl3): δ: 8.40 (br, 1H, CONHPh), 7.43 (d, 2H, J=7.7 Hz, 2Ha), 7.28 (d, 2H, J=7.7 Hz, Hb), 7.20 (m, 5H, 5xHd), 7.02 (t, 1H, J=7.4 Hz, Hc), 5.35 (d, 1H, J=7.8 Hz, CHNHBoc), 5.04 (d, 2H, J=2.6 Hz, BnOCH2), 4.26 (sa, 1H, CH2CHNHBOC), 2.60-2.52 (mc, 1H, 1xOCOCH2CH2), 2.46-2.38 (mc, 1H, 1x OCOCH2CH2), 2.21-2.12 (mc, 1H, 1xOCOCH2CH2), 1.99-1.90 (mc, 1H, 1x OCOCH2CH2), 1.40 (s, 9H, NHCO2C(CH3)3) ppm. MS: Positive mode [M + Na]+ = 435. MS: Negative mode [M + 2 H2O - H]- = 447. CAS nr: [126349-57-3] | |
94% | To a stirred solution of Boc-L-glutamic acid 5-benzyl ester [4a] (41 g, 122 mmol) in anhydrous CH2Cl2 (45 ml) at 0C, was added during 15 minutes a solution of DCC (30.1 g, 146 mmol) in anhydrous CH2Cl2 (45 ml). The resulting white solid was sonicated. After that, anhydrous aniline was added dropwise to the reaction mixture over 10 minutes at 0C (11.1 ml, 122 mmol). The mixture was stirred at room temperature for 40 minutes and filtered through Celite to remove insoluble material. The resulting liquid was evaporated to dryness and chromatographically purified, yielding the desired product (47.2 g, 94%). 1H-NMR (400 MHz, CDCl3): δ: 8.40 (br, 1H, CONHPh), 7.43 (d, 2H, J=7.7 Hz, 2Ha), 7.28 (d, 2H, J=7.7 Hz, Hb), 7.20 (m, 5H, 5xHd), 7.02 (t, 1H, J=7.4 Hz, Hc), 5.35 (d, 1H, J=7.8 Hz, CHNHBoc), 5.04 (d, 2H, J=2.6 Hz, BnOCH2), 4.26 (sa, 1H, CH2CHNHBoc), 2.60-2.52 (mc, 1H, 1xOCOCH2CH2), 2.46-2.38 (mc, 1H, 1x OCOCH2CH2), 2.21-2.12 (mc, 1H, 1xOCOCH2CH2), 1.99-1.90 (mc, 1H, 1x OCOCH2CH2), 1.40 (s, 9H, NHCO2C(CH3)3) ppm. MS: Positive mode [M + Na]+ = 435. MS: Negative mode [M + 2 H2O - H]- = 447. CAS nr: [126349-57-3] |
94% | To a stirred solution of Boc-L-glutamic acid 5-benzyl ester [4a] (41 g, 122 mmol) in anhydrous CH2Cl2 (45 ml) at 0 C., was added during 15 minutes a solution of DCC (30.1 g, 146 mmol) in anhydrous CH2Cl2 (45 ml). The resulting white solid was sonicated. After that, anhydrous aniline was added dropwise to the reaction mixture over 10 minutes at 0 C. (11.1 ml, 122 mmol). The mixture was stirred at room temperature for 40 minutes and filtered through Celite to remove insoluble material. The resulting liquid was evaporated to dryness and chromatographically purified, yielding the desired product (47.2 g, 94%).1H-NMR (400 MHz, CDCl3): δ: 8.40 (br, 1H, CONHPh), 7.43 (d, 2H, J7.7 Hz, 2Ha), 7.28 (d, 2H, J=7.7 Hz, Hb), 7.20 (m, 5H, 5xHd), 7.02 (t, 1H, J=7.4 Hz, He), 5.35 (d, 1H, J=7.8 Hz, CHNHBoc), 5.04 (d, 2H, J=2.6 Hz, BnOCH2), 4.26 (sa, 1H, CH2CHNHBoc), 2.60-2.52 (mc, 1H, 1xOCOCH2CH2), 2.46-2.38 (mc, 1H, 1xOCOCH2CH2), 2.21-2.12 (mc, 1H, 1xOCOCH2CH2), 1.99-1.90 (mc, 1H, 1x OCOCH2CH2), 1.40 (s, 9H, NHCO2C(CH3)3) ppm.MS: Positive mode [M+Na]+=435.MS: Negative mode [M+2 H2O-H]-=447.CAS nr: [126349-57-3] | |
94% | Example 1; Preparation of intermediate [6a]: Benzyl 4-(tert-butoxycarbonyl-amino)-5-oxo-5-(phenylamino) pentanoate To a stirred solution of Boc-L-glutamic acid 5-benzyl ester [4a1 (41 g, 122 mmol) in anhydrous CH2Cl2 (45 ml) at 0 C., was added during 15 minutes a solution of DCC (30.1 g, 146 mmol) in anhydrous CH2Cl2 (45 ml). The resulting white solid was sonicated. After that, anhydrous aniline was added dropwise to the reaction mixture over 10 minutes at 0 C. (11.1 ml, 122 mmol). The mixture was stirred at room temperature for 40 minutes and filtered through Celite to remove insoluble material. The resulting liquid was evaporated to dryness and chromatographically purified, yielding the desired product (47.2 g, 94%).1H-NMR (400 MHz, CDCl3): δ: 8.40 (br, 1H, CONHPh), 7.43 (d, 2H, J=7.7 Hz, 2Ha), 7.28 (d, 2H, J=7.7 Hz, Hb), 7.20 (m, 5H, 5× Hd), 7.02 (t, 1H, J=7.4 Hz, HO, 5.35 (d, 1H, J=7.8 Hz, CHNHBoc), 5.04 (d, 2H, J=2.6 Hz, BnOCH2), 4.26 (sa, 1H, CH2CHNHBoc), 2.60-2.52 (mc, 1H, 1× OCOCH2CH2), 2.46-2.38 (mc, 1H, 1× OCOCH2CH2), 2.21-2.12 (mc, 1H, 1× OCOCH2CH2), 1.99-1.90 (mc, 1H, 1× OCOCH2CH2), 1.40 (s, 9H, NHCO2C(CH3)3) ppm.MS: Positive mode [M+Na]+=435.MS: Negative mode [M +2 H2O-H]-=447.CAS nr: [126349-57-3] | |
94% | With dicyclohexyl-carbodiimide; In dichloromethane; at 0 - 20℃; for 0.833333h; | To a stirred solution of Boc-L-glutamic acid 5-benzyl ester [4a] (41 g, 122 mmol) in anhydrous CH2Cl2 (45 ml) at 0 C., was added during 15 minutes a solution of DCC (30.1 g, 146 mmol) in anhydrous CH2Cl2 (45 ml). The resulting white solid was sonicated. After that, anhydrous aniline was added dropwise to the reaction mixture over 10 minutes at 0 C. (11.1 ml, 122 mmol). The mixture was stirred at room temperature for 40 minutes and filtered through Celite to remove insoluble material. The resulting liquid was evaporated to dryness and chromatographically purified, yielding the desired product (47.2 g, 94%).1H-NMR (400 MHz, CDCl3): δ: 8.40 (br, 1H, CONHPh), 7.43 (d, 2H, J=7.7 Hz, 2Ha), 7.28 (d, 2H, J=7.7 Hz, Hb), 7.20 (m, 5H, 5×Hd), 7.02 (t, 1H, J=7.4 Hz, Hc), 5.35 (d, 1H, J=7.8 Hz, CHNHBoc), 5.04 (d, 2H, J=2.6 Hz, BnOCH2), 4.26 (sa, 1H, CH2CHNHBoc), 2.60-2.52 (mc, 1H, 1×OCOCH2CH2), 2.46-2.38 (mc, 1H, 1×OCOCH2CH2), 2.21-2.12 (mc, 1H, 1×OCOCH2CH2), 1.99-1.90 (mc, 1H, 1×OCOCH2CH2), 1.40 (s, 9H, NHCO2C(CH3)3) ppm.MS: Positive mode [M+Na]+=435.MS: Negative mode [M+2H2O-H]-=447.CAS nr: [126349-57-3]. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
69.5% | With dicyclohexyl-carbodiimide;dmap; In dichloromethane; at 20℃; for 1h; | 1,1-Dioxo-[1,2]thiazinane-3-carboxylic acid tert-butyl ester; This compound was prepared with a modified method described in the Journal of Medicinal Chemistry 2004, 47, 2981-2983. 2-tert-Butoxycarbonylamino-pentanedioic acid 5-benzyl ester (10 g, 29.6 mmol) was suspended in 80 ml of methylene chloride, 2-methyl-propan-2-ol (6.6 g, 88.9 mmol) was added and the reaction was cooled on ice-water bath. Dicyclohexylcarbodiimide (7.2 g, 34.4 mmol) was added slowly and followed by 4-dimethylaminopyridine (362 mg, 3.0 mmol). The reaction was stirred at room temperature for 1 hour. White solid was filtered and the filter cake was washed with methylene chloride. The filtrate was concentrated and the residue was treated with ether. After the solid was filtered off, the ether solution was washed with 0.5N HCl solution, brine and concentrated. The crude product was purified by using an ISCO (200 g) column chromatography, eluting with 5-20% ethyl acetate in hexanes to obtain 2-tert-butoxycarbonylamino-pentanedioic acid 5-benzyl ester 1-tert-butyl ester as a white solid. (8.1 g, 69.5%). LC-MS (ES) calculated for C21H31NO6, 393.5; found m/z 394.2 [M+H]+. |