【结 构 式】 |
【分子编号】36811 【品名】methyl (2R)-2-pyrrolidinecarboxylate 【CA登记号】 |
【 分 子 式 】C6H11NO2 【 分 子 量 】129.15888 【元素组成】C 55.8% H 8.58% N 10.84% O 24.77% |
合成路线1
该中间体在本合成路线中的序号:(III)The reaction of 2-nitrobenzoic acid with SOCl2 gives the acyl chloride (II), which is condensed with D-proline (III) by means of TEA in dichloromethane yielding the acyl proline (IV). The reductive cyclization of (IV) with H2 over Pd/C in methanol affords the pyrrolobenzodiazepinedione (V). The reduction of both lactam groups of (V) with LiAlH4 gave the pyrrolobenzodiazepine (VI), which is finally coupled with 4-[(2-phenylbenzoyl)amino]-benzoyl chloride (VII) furnishing the title compound.
【1】 Naito, A.; Ohtake, Y.; Hasegawa, H.; et al.; Novel vasopressin V2 receptor-selective antagonists, pyrrolo[2,1-a]quinoxaline and pyrrolo[2,1-c][1,4]benzodiazepine derivatives. Bioorg Med Chem 1999, 7, 6, 1247. |
【2】 Matsukawa, H.; Toyofuku, H.; Naito, A.; Ohtake, Y.; Saito, Y.; Naito, K. (Wakamoto Pharmaceutical Co., Ltd.); Biphenyl derivs. and medicinal compsns.. EP 0987266; WO 9843976 . |
中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
---|---|---|---|---|---|---|
(I) | 20951 | 2-nitrobenzoic acid;o-Nitrobenzoic acid | 552-16-9 | C7H5NO4 | 详情 | 详情 |
(II) | 21099 | o-nitrobenzoyl chloride; 2-nitrobenzoyl chloride | 610-14-0 | C7H4ClNO3 | 详情 | 详情 |
(III) | 36811 | methyl (2R)-2-pyrrolidinecarboxylate | C6H11NO2 | 详情 | 详情 | |
(IV) | 36807 | methyl (2R)-1-(2-nitrobenzoyl)-2-pyrrolidinecarboxylate | C13H14N2O5 | 详情 | 详情 | |
(V) | 36808 | (11aR)-2,3-dihydro-1H-pyrrolo[2,1-c][1,4]benzodiazepine-5,11(10H,11aH)-dione | C12H12N2O2 | 详情 | 详情 | |
(VI) | 36809 | (11aR)-2,3,5,10,11,11a-hexahydro-1H-pyrrolo[2,1-c][1,4]benzodiazepine | C12H16N2 | 详情 | 详情 | |
(VII) | 36810 | 4-[([1,1'-biphenyl]-2-ylcarbonyl)amino]benzoyl chloride | C20H14ClNO2 | 详情 | 详情 | |
(VIII) | 29797 | 2H-3,1-benzoxazine-2,4(1H)-dione;Isatoic anhydride;4H-3,1-Benzoxazine-2,4(1H)-dione;1,2-Dihydro-4H-3,1-benzoxazine-2,4-dione;1H-benzo[d][1,3]oxazine-2,4-dione | 118-48-9 | C8H5NO3 | 详情 | 详情 |
合成路线2
该中间体在本合成路线中的序号:(III)Esterification of N-benzyloxycarbonyl-D-proline (I) with MeOH in the presence of EDC, followed by deprotection of the resultant N-Cbz amino ester (II) with H2 and Pd(OH)2 leads to D-proline methyl ester (III). Subsequent coupling of (III) with N-benzyloxycarbonyl-O-t-butyl-L-4-trans-hydroxyproline (IV) yields the protected dipeptide (V). After removal of the N-benzyloxycarbonyl group of (V) by catalytic hydrogenolysis, the free amine (VI) is acylated by 3,3,3-triphenylpropionic acid (VII), producing amide (VIII). The methyl ester group of (VIII) is then hydrolyzed under alkaline conditions to furnish acid (IX).
【1】 Sagara, Y.; Kimura, T.; Fujikawa, T.; Noguchi, K.; Ohtake, N.; Identification of novel muscarinic M3 selective antagonists with a conformationally restricted Hyp-Pro spacer. Bioorg Med Chem Lett 2003, 13, 1, 57. |
【2】 Kimura, T.; Noguchi, K.; Otake, N.; Uchiyama, M.; Naya, A.; Sagara, Y.; Numazawa, T.; Fujikawa, T. (Banyu Pharmaceutical Co., Ltd.); Novel amide derivs.. EP 1213281; WO 0107406 . |
中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
---|---|---|---|---|---|---|
(I) | 17005 | (2R)-1-[(benzyloxy)carbonyl]tetrahydro-1H-pyrrole-2-carboxylic acid | C13H15NO4 | 详情 | 详情 | |
(II) | 62798 | 1-benzyl 2-methyl (2R)-1,2-pyrrolidinedicarboxylate | C14H17NO4 | 详情 | 详情 | |
(III) | 36811 | methyl (2R)-2-pyrrolidinecarboxylate | C6H11NO2 | 详情 | 详情 | |
(IV) | 62799 | (2S,4R)-1-[(benzyloxy)carbonyl]-4-(tert-butoxy)-2-pyrrolidinecarboxylic acid | C17H23NO5 | 详情 | 详情 | |
(V) | 62800 | benzyl (2S,4R)-4-(tert-butoxy)-2-{[(2R)-2-(methoxycarbonyl)pyrrolidinyl]carbonyl}-1-pyrrolidinecarboxylate | C23H32N2O6 | 详情 | 详情 | |
(VI) | 62801 | methyl (2R)-1-{[(2S,4R)-4-(tert-butoxy)pyrrolidinyl]carbonyl}-2-pyrrolidinecarboxylate | C15H26N2O4 | 详情 | 详情 | |
(VII) | 57640 | 3,3,3-Triphenylpropionic acid; Tritylacetic acid | 900-91-4 | C21H18O2 | 详情 | 详情 |
(VIII) | 62802 | methyl (2R)-1-{[(2S,4R)-4-(tert-butoxy)-1-(3,3,3-triphenylpropanoyl)pyrrolidinyl]carbonyl}-2-pyrrolidinecarboxylate | C36H42N2O5 | 详情 | 详情 | |
(IX) | 62803 | (2R)-1-{[(2S,4R)-4-(tert-butoxy)-1-(3,3,3-triphenylpropanoyl)pyrrolidinyl]carbonyl}-2-pyrrolidinecarboxylic acid | C35H40N2O5 | 详情 | 详情 |