|
【结 构 式】 
|
【分子编号】38568 【品名】2-benzyl 1-(tert-butyl) (2S,4R)-4-hydroxy-1,2-pyrrolidinedicarboxylate 【CA登记号】 |
【 分 子 式 】C17H23NO5 【 分 子 量 】321.37336 【元素组成】C 63.54% H 7.21% N 4.36% O 24.89% |
合成路线1
该中间体在本合成路线中的序号：(XIV)The protection of the NH group of trans-4-hydroxy-L-proline (XII) with tert-butoxycarbonyl anhydride and NaOH in tert-butanol/water gives the N-protected proline (XIII), which is esterified with benzyl alcohol and triethylamine to the benzyl ester (XIV). The tosylation of (XIV) with tosyl chloride and pyridine affords the tosylate (XV), which is debenzylated with H2 over Pd/C yielding the tosylated proline (XVI). The arylation of (XVI) with phenyllithium (XVII) and CuBr in ether/THF affords 1-(tert-butoxycarbonyl)-4(S)-phenyl)-L-proline (XVIII), which is deprotected with TFA in chloroform giving 4(S)-phenyl-L-proline (XIX). Finally, this compound is reduced with H2 over PtO2 in ethanol providing the desired intermediate trans-4-cyclohexyl-L-proline (XI).
| 【1】 Moniot, J.L.; Thottathil, J.K.; Littium diphenylcuprate reactions with 4-tosyloxy-L-prolines; An interesting stereochemical outcome. A synthesis of trans-4-phenyl-L-proline. Tetrahedron Lett 1986, 27, 2, 151. |
| 【2】 Floyd, D.; Thottathil, J.K.; Brandt, S.; Moniot, J.L. (Bristol-Myers Squibb Co.); Method for making substd. prolines. DE 3434121; US 4501901 . |
| 中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
|---|---|---|---|---|---|---|
| 12912 | 1-(Bromomethyl)benzene; Alpha-bromotoluene | 100-39-0 | C7H7Br | 详情 | 详情 | |
| (XI) | 38567 | (2S,4S)-4-cyclohexyl-2-pyrrolidinecarboxylic acid | C11H19NO2 | 详情 | 详情 | |
| (XII) | 14489 | (2S,4R)-4-hydroxytetrahydro-1H-pyrrole-2-carboxylic acid; L-Hydroxyproline | 51-35-4 | C5H9NO3 | 详情 | 详情 |
| (XIII) | 16094 | (2S,4R)-1-(tert-butoxycarbonyl)-4-hydroxypyrrolidine-2-carboxylic acid;1-(tert-butoxycarbonyl)-4®-hydroxy-L-proline;(2S,4R)-1-(tert-butoxycarbonyl)-4-hydroxytetrahydro-1H-pyrrole-2-carboxylic acid | 16094 | C10H17NO5 | 详情 | 详情 |
| (XIV) | 38568 | 2-benzyl 1-(tert-butyl) (2S,4R)-4-hydroxy-1,2-pyrrolidinedicarboxylate | C17H23NO5 | 详情 | 详情 | |
| (XV) | 38569 | 2-benzyl 1-(tert-butyl) (2S,4R)-4-[[(4-methylphenyl)sulfonyl]oxy]-1,2-pyrrolidinedicarboxylate | C24H29NO7S | 详情 | 详情 | |
| (XVI) | 38570 | (2S,4R)-1-(tert-butoxycarbonyl)-4-[[(4-methylphenyl)sulfonyl]oxy]-2-pyrrolidinecarboxylic acid | C17H23NO7S | 详情 | 详情 | |
| (XVII) | 24014 | Phenyllithium | 591-51-5 | C6H5Li | 详情 | 详情 |
| (XVIII) | 38571 | (2S,4S)-1-(tert-butoxycarbonyl)-4-phenyl-2-pyrrolidinecarboxylic acid | C16H21NO4 | 详情 | 详情 | |
| (XIX) | 38572 | (2S,4S)-4-phenyl-2-pyrrolidinecarboxylic acid | C11H13NO2 | 详情 | 详情 |