Preparation of azetidin-2-ones suitable for the synthesis of thienamycin and azetidin-2-ones useful in a synthesis of that kind

摘要

Disclosed is a process for the total synthesis of thienamycin from 4-allylazedinone (IIIa)via intermediate (III):R = H, blocking group or salt cationR° = H, alkyl, aralkyl, cycloalkyl or cycloalkylalkyl.