申请人:Pfizer Inc.
公开号:US05436344A1
公开(公告)日:1995-07-25
Compounds of the formula ##STR1## wherein R.sup.1 is hydrogen, fluoro, chloro, bromo, nitro, trifluoromethyl, C.sub.1 to C.sub.4 alkoxy, C.sub.1 to C.sub.4 alkylthio or C.sub.1 to C.sub.6 alkyl and R.sup.2 is a group of the formula ##STR2## wherein R.sup.3 is hydrogen or C.sub.1 to C.sub.6 alkyl, R.sup.4 is --CH.dbd.C.sub.2, --CH.sub.2 --YR.sup.5, or --COR.sup.6, R.sup.5 is hydrogen or an acid labile alcohol protecting group, Y is oxygen or sulfur, and R.sup.6 is --NR.sup.7 R.sup.8 or --OR.sup.9 wherein R.sup.7, R.sup.8 and R.sup.9 are independently selected from hydrogen or C.sub.1 to C.sub.6 alkyl, or an alkaline or alkaline earth metal salt thereof, which are intermediates in the preparation of hydantoin aldose reductase inhibitors and methods of preparing these intermediates.
化合物的公式为##STR1##其中R.sup.1是氢,氟,氯,溴,硝基,三氟甲基,C.sub.1到C.sub.4烷氧基,C.sub.1到C.sub.4烷硫基或C.sub.1到C.sub.6烷基,而R.sup.2是公式##STR2##中的一个基团,其中R.sup.3是氢或C.sub.1到C.sub.6烷基,R.sup.4是--CH.dbd.C.sub.2,--CH.sub.2--YR.sup.5或--COR.sup.6,R.sup.5是氢或酸敏感的醇保护基,Y是氧或硫,而R.sup.6是--NR.sup.7 R.sup.8或--OR.sup.9,其中R.sup.7,R.sup.8和R.sup.9独立地选择自氢或C.sub.1到C.sub.6烷基,或其碱性或碱土金属盐,这些化合物是乙酰脲醛还原酶抑制剂制备的中间体,以及制备这些中间体的方法。