Substituted azetidinone carboxylates of the general formula I
wherein R, represents a benzyl, benzhydryl or tosyl group and R2 represents a hydrogen atom or an alkyl group of up to 6 carbon atoms;
process for the preparation of azetidinones of formula I, which comprises oxidising an N-substituted dioxopyrrolidine of general formula II:-
process for the preparation of an N-substituted-3-hydroxymethyl azetidine derivative of general formula III
which comprises reduction of an N-substituted azetidinone carboxylate of general formula I above.
通式 I 的取代的氮杂
环丁酮羧酸盐
其中 R 代表苄基、苯甲基或
甲苯基,R2 代表氢原子或最多 6 个碳原子的烷基;
制备通式Ⅰ的氮杂
环丁酮的工艺,包括氧化通式Ⅱ的N-取代的二氧代
吡咯烷
通式 III 的 N-取代-3-羟甲基氮杂
环丁烷衍
生物的制备工艺
制备通式 III 的 N-取代-3-羟甲基氮杂
环丁烷衍
生物的工艺,包括还原上述通式 I 的 N-取代氮杂
环丁酮羧酸盐。