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.
一种化合物的公式:## STR1 ##其中R.sub.1,R.sub.2,R.sub.3和R.sub.4分别是氢原子,低级烷基,芳基(低级)烷基或芳基,或R.sub.1和R.sub.2可以结合在一起形成低级烷基烯基和/或R.sub.3和R.sub.4结合在一起形成低级烷基烯基,或R.sub.1,R.sub.2,R.sub.3和R.sub.4可以结合在一起形成o-苯撑基,X是卤素原子,Y是氧原子或被低级烷基或芳基取代的氮原子,该化合物在合成有价值的抗生素1.beta.-甲基碳青霉烯化合物中用作中间体。