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-内酰胺化合物的化学式:##STR1## 其中R.sub.1为氢原子,较低的烷基或1-羟基(较低)烷基,其中羟基可以选用保护基;R.sub.2为氢原子或氮原子的保护基;R.sub.3为甲基基团、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、较低的烷氧羰基基团或芳基(较低)烷氧羰基基团,其中芳基基团可以选用取代基;或R.sub.2和R.sub.3结合形成氧代烷基基团,并且当它们与一个氮原子和其相邻的两个碳原子一起取时,它们代表一个六元环氨基缩醛基团,该化合物在1-甲基碳青霉烯化合物的立体特异性生产中作为有价值的中间体。