反应详情

温度

60 °C

Zinc powder (78.4 g) was added to a solution of benzhydryl 7-phenylacetamido-3-formyl-2-cephem-4-carboxylate (102.4 g) and triphenylphosphine (367.2 g) in a mixture of carbon tetrachloride (800 ml) and N,N-dimethylacetamide (200 ml) at ambient temperature and the mixture was stirred at 60° C. for 30 minutes. After being cooled, the mixture was added to ethyl acetate (20 l) and the resulting precipitates were filtered off and the filtrate was evaporated in vacuo. The residue was purified by column chromatography on silica gel to give benzhydryl 7-phenylacetamido-3-(2,2-dichlorovinyl)-2-cephem-4-carboxylate (15.26 g).

1. temperatureAfter being cooled
2. customthe resulting precipitates
3. filtrationwere filtered off
4. customthe filtrate was evaporated in vacuo
5. customThe residue was purified by column chromatography on silica gel