申请人:Fujisawa Pharmaceutical Co., Ltd.
公开号:US05075437A1
公开(公告)日:1991-12-24
The invention relates to the preparation of 3,4-disubstituted-2-azetidinone compounds of the formula: ##STR1## in which R.sup.1 is hydrogen or amido-protective group, R.sup.2 is hydroxy(lower)alkyl or protected hydroxy(lower)alkyl, R.sup.3 is lower alkyl, and R.sup.4 is 1-(lower)alkyl-1-hydroxy(C.sub.2 -C.sub.6)alkyl, 1-(lower)alkyl-1-(protected hydroxy)-(C.sub.2 -C.sub.6)alkyl or 2-thioxothiazolidin-3-yl, useful as an intermediate for the production of antimicrobial agents by reacting a compound a compound of the formula: ##STR2## in which R.sup.5 is acyl, or salts thereof, with a compound of the formula: R.sup.3 --CH.sub.2 CO--R.sup.4 or salts thereof, in the presence of an enolizating agent selected from the group consisting of stannous(lower)alkylsulfonate and stannous perhalo(lower)alkylsulfonate.
本发明涉及制备公式为:##STR1##其中R.sup.1为氢或氨基保护基,R.sup.2为羟基(低)烷基或保护羟基(低)烷基,R.sup.3为低烷基,R.sup.4为1-(低)烷基-1-羟基(C.sub.2-C.sub.6)烷基,1-(低)烷基-1-(保护羟基)-(C.sub.2-C.sub.6)烷基或2-硫代噻唑啉-3-基,作为一种中间体用于通过反应公式为:##STR2##其中R.sup.5为酰基或其盐,与公式为:R.sup.3 --CH.sub.2 CO--R.sup.4或其盐在亚锡(低)烷基磺酸盐和亚锡卤代(低)烷基磺酸盐选择的烯醇化剂存在下生产抗微生物剂。