申请人:Imperial Chemical Industrial PLC
公开号:US05155236A1
公开(公告)日:1992-10-13
Compounds of formula I: ##STR1## wherein: R1 is hydrogen or alkyl; R2 is alkyl optionally substituted by one or more alkoxy groups or halogen atoms; X is a group of formula --OR3 wherein R3 is alkyl, cycloalkyl, or arylalkyl; or X is a group of formula --NHCVR4 wherein V is oxygen or sulphur, R4 is hydrogen, alkyl, cycloalkyl (which alkyl and cycloalkyl groups may be substituted), alkenyl, aryl, arylalkyl, amino, mono- or di-alkylamino or a group of the formula --OR5 wherein R5 is optionally substituted alkyl, aryl or arylalkyl; or X is a group of formula --NHSO.sub.2 R4a wherein R4a is alkyl, aryl or a group of formula --CH.sub.2 COR4b wherein R4b is alkyl or aryl; Y is optionally substituted alkoxy, cycloalkoxy, arylalkoxy or a group of formula --NR6R7 wherein R6 is hydrogen or alkyl and R7 is alkyl, cycloalkyl (which alkyl and cycloalkyl groups may be substituted), aryl or arylalkyl or R7 is a group of formula --COOR8 wherein R8 is alkyl are useful intermediates in the synthesis of beta-lactam antibiotics.
化合物的化学式为I:##STR1## 其中:R1是氢或烷基;R2是烷基,可选择性地用一个或多个烷氧基或卤素原子取代;X是公式--OR3的基团,其中R3是烷基,环烷基或芳基烷基;或X是公式--NHCVR4的基团,其中V是氧或硫,R4是氢,烷基,环烷基(该烷基和环烷基可以被取代),烯基,芳基,芳基烷基,氨基,单烷基或二烷基氨基或公式--OR5的基团,其中R5是可选择性取代的烷基,芳基或芳基烷基;或X是公式--NHSO.sub.2 R4a的基团,其中R4a是烷基,芳基或公式--CH.sub.2 COR4b的基团,其中R4b是烷基或芳基;Y是可选择性取代的烷氧基,环烷氧基,芳基烷氧基或公式--NR6R7的基团,其中R6是氢或烷基,R7是烷基,环烷基(该烷基和环烷基可以被取代),芳基或芳基烷基,或R7是公式--COOR8的基团,其中R8是烷基,是合成β-内酰胺类抗生素的有用中间体。