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【结 构 式】 
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【分子编号】12326 【品名】isopropyl N-[(1S)-1-benzyl-2-hydroxyethyl]carbamate 【CA登记号】 |
【 分 子 式 】C13H19NO3 【 分 子 量 】237.2988 【元素组成】C 65.8% H 8.07% N 5.9% O 20.23% |
合成路线1
该中间体在本合成路线中的序号：(XV)2) Synthesis of (2R,3S)-3-amino-4-cyclohexyl-2-hydroxybutyric acid isopropyl ester (II): Phenylalanine methyl ester (XIII) is protected with isopropyl chloroformate and triethylamine in THF to give N-(isopropoxycarbonyl)phenylalanine methyl ester (XIV), which is reduced with NaBH4 - LiCl in THF - ethanol, yielding N-(isopropoxycarbonyl)phenylalaninol (XV). The hydrogenation of (XV) with H2 over Rh/Al2O3 in methanol affords N-(isopropoxycarbonyl)cyclohexylalaninol (XVI), which is oxidized with pyridine - SO3 in DMSO to the corresponding aldehyde (XVII). The reaction of (XVII) with NaCN - HCl in CHCl3 - water affords (2R,3S)-3-amino-4-cyclohexyl-2-hydroxybutyric acid (XVIII), which is finally esterified with isopropanol - HCl to give (II). 3) Synthesis of KRY-1314: By condensation of N(tau)-tert-butoxycarbonyl-N(alpha)-[2(R)-(morpholinocarbonylmethyl)-3-(1-naphthyl)propionyl]histidine (I) with (2R,3S)-3-amino-4-cyclohexyl-2-hydroxybutyric acid isopropyl ester (II) by means of dicyclohexylcarbodiimide (DCC) and N-hydroxy-5-norbornene-2,3-dicarboximide (HONB) in acetonitrile - triethylamine.
| 【1】 Harada, H.; Iyobe, A.; Tsubaki, A.; Yamaguchi, T.; Kamijo, T.; Kiso, Y.; Iizuka, K.; Hirata, K.; A practical synthesis of an orally potent renin inhibitor, isopropyl (2R,3S)-4-cyclohexyl-2-hydroxy-3-[N-[(2R)-2-morpholinocarbonylmethyl-3-(1-naaphthyl)propionyl]-L-histidyl]aminobutyrate. J Chem Soc - Perkins Trans I 1990, 9, 2497-500. |
| 中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
|---|---|---|---|---|---|---|
| 26492 | 2-[(chlorocarbonyl)oxy]propane | 108-23-6 | C4H7ClO2 | 详情 | 详情 | |
| (I) | 12312 | (2S)-3-[1-(tert-Butoxycarbonyl)-1H-imidazol-5-yl]-2-[[(2R)-4-(4-morpholinyl)-2-(1-naphthylmethyl)-4-oxobutanoyl]amino]propionic acid | C30H36N4O7 | 详情 | 详情 | |
| (II) | 12323 | isopropyl (2R,3S)-3-amino-4-cyclohexyl-2-hydroxybutanoate | C13H25NO3 | 详情 | 详情 | |
| (XIII) | 12324 | methyl (2R)-2-amino-3-phenylpropanoate | 21685-51-8 | C10H13NO2 | 详情 | 详情 |
| (XIV) | 12325 | methyl (2S)-2-[(isopropoxycarbonyl)amino]-3-phenylpropanoate | C14H19NO4 | 详情 | 详情 | |
| (XV) | 12326 | isopropyl N-[(1S)-1-benzyl-2-hydroxyethyl]carbamate | C13H19NO3 | 详情 | 详情 | |
| (XVI) | 12327 | isopropyl N-[(1S)-2-cyclohexyl-1-(hydroxymethyl)ethyl]carbamate | C13H25NO3 | 详情 | 详情 | |
| (XVII) | 12328 | isopropyl N-[(1S)-2-cyclohexyl-1-formylethyl]carbamate | C13H23NO3 | 详情 | 详情 | |
| (XVIII) | 12329 | (2R,3S)-3-Amino-4-cyclohexyl-2-hydroxybutyric acid | C10H19NO3 | 详情 | 详情 |