(S)-2,2-dimethyl-4-(2-phenoxy-ethyl)-oxazolidine-3-carboxylic acid tert-butyl ester → (S)-4-(2-cyclohexyloxy-ethyl)-2,2-dimethyl-oxazolidine-3-carboxylic acid tert-butyl ester
反応式
[C:1]([O:5][C:6]([N:8]1[C@@H:12]([CH2:13][CH2:14][O:15][C:16]2[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=2)[CH2:11][O:10][C:9]1([CH3:23])[CH3:22])=[O:7])([CH3:4])([CH3:3])[CH3:2]>C(O)C.O=[Al]O[Al]=O.[Rh]>[C:1]([O:5][C:6]([N:8]1[C@@H:12]([CH2:13][CH2:14][O:15][CH:16]2[CH2:17][CH2:18][CH2:19][CH2:20][CH2:21]2)[CH2:11][O:10][C:9]1([CH3:23])[CH3:22])=[O:7])([CH3:4])([CH3:2])[CH3:3]参加物
4
実験手順
To a solution of (S)-2,2-dimethyl-4-(2-phenoxy-ethyl)-oxazolidine-3-carboxylic acid tert-butyl ester (150 mg) in ethanol (3 ml) at room temperature was added rhodium on activated alumina (15 mg). The mixture was stirred under an atmosphere of hydrogen (1 atm) at room temperature for 16 h. The catalyst was removed by filtration and the filtrate was concentrated in vacuo to yield (S)-4-(2-cyclohexyloxy-ethyl)-2,2-dimethyl-oxazolidine-3-carboxylic acid tert-butyl ester as a black oil (145 mg, 95%); MS (ISP): 328.4 ([M+H]+).