A process for preparing an azetidinone derivative represented by the formula (I)
wherein R1 represents an aryl group, arylmethyl group or aryloxymethyl group, R2 represents hydrogen atom or a carboxyl-protecting group and R3 represents an alkyl group or aryl group, the process comprising reacting an azetidinone derivative represented by the formula (II)
wherein R1, R2 and R3 are as defined above with a chlorinating agent.
一种制备由式(I)代表的氮杂
环丁酮衍
生物的工艺,其中R1代表芳基、芳甲基或芳氧甲基,R2代表氢原子或羧基保护基,R3代表烷基或芳基,该工艺包括将由式(II)代表的氮杂
环丁酮衍
生物(其中R1、R2和R3如上所定义)与
氯化剂反应。