申请人:Pfizer Inc.
公开号:US03994939A1
公开(公告)日:1976-11-30
A chemical process which comprises reacting 6-(2-phenylacetamido)- or 6-(2-phenoxyacetamido)-2,2-dimethyl-3-(5-tetrazolyl)penams and certain derivatives thereof which carry a blocking or pseudo blocking group on the tetrazolyl moiety with a halogenating agent at or below 0.degree. C. to form the corresponding imino halide, followed by reaction of the imino halide with an alcohol below about -20.degree. C. to form the corresponding imino ether, and hydrolyzing the imino ether under acid conditions. The preparation of the starting 6-acyl-2,2-dimethyl-3-(5-tetrazolyl)penams is described.
一种化学过程,包括将带有阻断或伪阻断基团的6-(2-苯乙酰胺基)-或6-(2-苯氧乙酰胺基)-2,2-二甲基-3-(5-四唑基)青霉烷及其衍生物与卤化试剂在0℃或以下反应,形成相应的亚胺卤化物,然后在约-20℃以下的醇中反应,形成相应的亚胺醚,并在酸性条件下水解亚胺醚。还描述了起始的6-酰基-2,2-二甲基-3-(5-四唑基)青霉烷的制备。