1ξ-oxo-6β-(2-phenoxy-acetylamino)-1λ4-penicillanic acid 2-methanesulfonyl-ethyl ester 在
α,α'-azobis(N-methylformamide) 作用下,
以
N,N-二甲基乙酰胺 为溶剂,
生成 (6
R)-3-methyl-8-oxo-7
t-(2-phenoxy-acetylamino)-(6
rH)-5-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid 2-methanesulfonyl-ethyl ester