反应详情

温度

40 °C

To a solution of benzhydryl 7-(4-chloro-2-methoxycarbonylmethoxyimino-3-oxobutyramido)-3-vinyl-3-cephem-4-carboxylate (syn isomer) (2.0 g) in a mixture of tetrahydrofuran (10 ml) and water (10 ml) were added thiourea (0.5 g) and sodium acetate (1.34 g). The mixture was stirred at 40° C. for 4 hours. The resultant solution was extracted with ethyl acetate (100 ml), and the extract was washed with a saturated aqueous sodium chloride twice. After the resultant solution was dried over magnesium sulfate, the solvent was removed by distillation under reduced pressure to give benzhydryl 7-[2-(2-aminothiazol-4-yl)-2-methoxycarbonylmethoxyiminoacetamido]-3-vinyl-3-cephem-4-carboxylate (syn isomer) (2.0 g).

1. extractionThe resultant solution was extracted with ethyl acetate (100 ml)
2. washthe extract was washed with a saturated aqueous sodium chloride twice
3. dry with materialAfter the resultant solution was dried over magnesium sulfate
4. customthe solvent was removed by distillation under reduced pressure