Acetic Acid → (S)-tert-Butyl 2-cyclopropyl-1-(5-methyl-1,2,4-oxadiazol-3-yl)ethylcarbamate
反応式
[C:1](O)(=O)[CH3:2].[NH2:5]/[C:6](=[N:20]\[OH:21])/[C@@H:7]([NH:12][C:13](=[O:19])[O:14][C:15]([CH3:18])([CH3:17])[CH3:16])[CH2:8][CH:9]1[CH2:11][CH2:10]1>CN(C=O)C>[CH:9]1([CH2:8][C@H:7]([NH:12][C:13](=[O:19])[O:14][C:15]([CH3:18])([CH3:16])[CH3:17])[C:6]2[N:5]=[C:1]([CH3:2])[O:21][N:20]=2)[CH2:10][CH2:11]1参加物
4
実験手順
To a solution of acetic acid (0.224 g, 4 mmol) in DMF (5 mL) was added N,N′-carbonyldiimidazole (0.6 g, 4 mmol) and the mixture was stirred for 0.5 h at room temperature. (S,Z)-tert-butyl 1-amino-3-cyclopropyl-1-(hydroxyimino)propan-2-ylcarbamate (0.84 g, 3 mmol) was added and the mixture was heated to 120° C. and stirred for 4 h. After evaporation of solvents, the residue was purified by column chromatography (silica gel, 20 g, eluting with 10% ethyl acetate in petroleum ether) to give the title compound (0.5 g; 54%) as yellow solid; MS (EI): m/e 290.1 [M+Na]+.