Azetidin-2-one derivatives and process for production thereof.

摘要

An azetidin-2-one derivative represented by the following formula (I)
wherein R' represents a hydrogen atom, a lower alkyl group, an aryl group, an aralkyl group, a lower alkoxy group, aralkoxy group, a lower alkylthio group, an aralkylthio group, or a substituted amino group, R² represents a hydrogen atom, a lower alkyl group, an aryl group or an aralkyl group, and R³ represents a hydrogen atom or a group of the formula
In which R⁴ represents a hydrogen atom or a protective group for the hydroxyl group; and a process for production thereof.