| 摘要 |
Title compds.(I; A= amino or substituted amino; Y = secodary group such as III, IV, V, VI, VII; COB = carboxyl or protective carboxyl; X = H or nucleophilic group; Z = leaving group), useful as fungicide, were prepd. by rearranging II. Thus, 350 mg 7α-benzamido-3ε-hydroxy-3ε-hydroxymethyl-1-dethia-1-oxazepham-4α-diphenylmethylcarboxylate was treated with pyridine and methanesulfonyl chloride at 0≦̸C for 1 hr in dichloromethane to give 145 mg 7α-benzamido-3ε-hydroxy-3ε-methanesulfonyloxy-methyl-1-dethia-1-oxacepham-4α-diphenylmethyl-carboxylate.
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