申请人:Sumitomo Pharmaceuticals Company, Limited
公开号:US05112966A1
公开(公告)日:1992-05-12
A beta-lactam compound of the formula: ##STR1## wherein R.sub.1 is a hydrogen atom, a lower alkyl group or a 1-hydroxy(lower)alkyl group wherein the hydroxyl group is optionally protected, R.sub.2 is a hydrogen atom or a protective group for the nitrogen atom and R.sub.3 is a methyl group, a halomethyl group, a hydroxymethyl group, a protected hydroxymethyl group, a formyl group, a carboxyl group, a lower alkoxycarbonyl group or an ar(lower)alkoxycarbonyl group wherein the aryl group is optionally substituted, or R.sub.2 and R.sub.3 are combined together to form an oxaalkylene group and, when taken together with one nitrogen atom and two carbon atoms adjacent thereto, they represent a six-membered cyclic aminoacetal group, which is useful as a valuable intermediate in the stereospecific production of 1-methylcarbapenem compounds.
一种β-内酰胺化合物的化学式为:##STR1## 其中R.sub.1是氢原子、低碳基或1-羟基(低)烷基,其中羟基可以选择性地保护,R.sub.2是氢原子或氮原子的保护基,R.sub.3是甲基基团、卤代甲基基团、羟甲基基团、保护羟甲基基团、甲酰基基团、羧基基团、低碳酰氧基基团或芳基(低)酰氧基基团,其中芳基基团可以选择性地被取代,或R.sub.2和R.sub.3结合在一起形成氧杂环烷基,当与一个相邻的氮原子和两个碳原子一起取代时,它们代表一个六元环氨基乙醛基团,在立体特异性制备1-甲基碳青霉烯化合物的中间体中有用。