tert-butyl 7β-chloro-2(E)-7α-isopropoxy-3-methyl-2-(N,N-dimethylaminomethylene)-1,1-dioxoceph-3-em-4-carboxylate 在
盐酸羟胺 作用下,
以
乙腈 为溶剂,
以20%的产率得到tert-butyl 10β-chloro-(2S,6S,7S,10R,11R)-10α-isopropoxy-6-methyl-5-oxa-1,1,9-trioxo-1-thia-4,8-diazatricyclo[7,2,0,0
2,6]undecane-7(R)-carboxylate