申请人:Sumitomo Pharmaceuticals Company, Limited
公开号:US05075435A1
公开(公告)日:1991-12-24
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,其化学式为:##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被保护;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,受保护的羟甲基基团,甲酰基基团,羧基基团,低碳基氧羰基基团或芳基(低)烷氧羰基基团,其中芳基基团可以选择性地被取代,或R.sub.2和R.sub.3组合在一起形成氧杂环烷基基团,并且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,该化合物在立体特异性生产1-甲基碳青霉烯化合物中作为有价值的中间体。