PROCESS FOR PRODUCING 4-CHLOROAZETIDINONE COMPOUND

摘要

Disclosed is a process for producing a 4-chloroazetidinone compound, which is a compound useful as an intermediate for the synthesis of a carbapenem antibiotic, with high efficiency and in a high yield.  Also disclosed is an intermediate which can be used as a starting material in the process. Specifically disclosed is a process for producing a 4-chloroazetidinone compound represented by general formula (1) [wherein R1 represents a hydrogen atom or a protective group for a hydroxy group] by chlorinating the fourth position in a 4-dithioazetidinone compound represented by general formula (2) [wherein R1 is as defined in above; and R3 represents a heterocyclic group].