申请人:Sumitomo Pharmaceuticals Company, Limited
公开号:US05231179A1
公开(公告)日:1993-07-27
A compound of the formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each a hydrogen atom, a lower alkyl group, an ar(lower)alkyl group or an aryl group, or R.sub.1 and R.sub.2 may be combined together to form a lower alkylene group and/or R.sub.3 and R.sub.4 are combined together to form a lower alkylene group, or R.sub.1, R.sub.2, R.sub.3 and R.sub.4 may be combined together to form an o-phenylene group, X is a halogen atom and Y is an oxygen atom or a nitrogen atom substituted with lower alkyl or aryl, which is useful as an intermediate in the synthesis of 1.beta.-methylcarbapenem compounds valuable as antibiotics.
其中R.sub.1、R.sub.2、R.sub.3和R.sub.4分别是氢原子、较低的烷基基团、取代芳基烷基基团或芳基,或者R.sub.1和R.sub.2可以结合形成较低的烷基烯基基团和/或R.sub.3和R.sub.4结合形成较低的烷基烯基基团,或者R.sub.1、R.sub.2、R.sub.3和R.sub.4可以结合形成o-苯基烯基基团,X是卤素原子,Y是氧原子或取代较低烷基或芳基的氮原子,这在1-β-甲基卡巴比那酮类抗生素的合成中作为中间体是有用的。