Author's Organization:Central Research Laboratories, Sankyo Co., Ltd. Central Research Laboratories, Sankyo Co., Ltd. Central Research Laboratories, Sankyo Co., Ltd. Central Research Laboratories, Sankyo Co., Ltd. Central Research Laboratories, Sankyo Co., Ltd.
7α-Methoxy-7β-vinylacetamidocephalosporins were synthesized from 7β-(ω-halocrotonyl) aminocephalosporins using phosphorus pentachloride and lithium methoxide by a 1, 6-elimination reaction.