申请人:National Science Council
公开号:US05646164A1
公开(公告)日:1997-07-08
The present inventors have discovered three classes of novel .alpha.-methylene-.gamma.-butyrolactones with excellent antiplatelet activity. As a result of intensive studies, it has been found that compounds represented by the formula I-III are potent inhibitors of platelet aggregation. ##STR1## For the formula I, R.sub.1 is a methyl, a phenyl group optionally substituted with one or two group selected from halide, (C.sub.1 -C.sub.4) alkyl, (C.sub.1 -C.sub.4) alkoxy, phenyl, nitro, amino. For the formula II, R.sub.1 is a methyl, a phenyl group optionally substituted with one or two group selected from halide, (C.sub.1 -C.sub.4) alkyl, (C.sub.1 -C.sub.4) alkoxy, phenyl, nitro, amino; R.sub.2 represents hydrogen, halide, (C.sub.1 -C.sub.4) alkyl, phenyl, nitro, amino; R.sub.3 represents hydrogen, halide, (C.sub.1 -C.sub.4) alkyl, phenyl, nitro, amino. For the formula III, R.sub.1 is a methyl, a phenyl group optionally substituted with one or two group selected from halide, (C.sub.1 -C.sub.4) alkyl, (C.sub.1 -C.sub.4) alkoxy, phenyl, nitro, amino; R.sub.4 represents hydrogen, hydroxy, (C.sub.1 -C.sub.4) alkyl. The present invention also provides a cost-efficient method for the preparation of formula I-III. Formula I-III may be administered orally or parenterly with an inert diluent or with a pharmaceutically acceptable carrier in the treatment or the prevention of cardiovascular disease.
本发明者已经发现了三类具有优异抗血小板活性的新型α-亚甲基-γ-丁内酯。通过深入的研究,发现由式I-III所代表的化合物是强效的血小板聚集抑制剂。其中,对于式I,R1是甲基,苯基,可选地取代一个或两个来自卤素,(C1-C4)烷基,(C1-C4)烷氧基,苯基,硝基,氨基的基团。对于式II,R1是甲基,苯基,可选地取代一个或两个来自卤素,(C1-C4)烷基,(C1-C4)烷氧基,苯基,硝基,氨基的基团;R2代表氢,卤素,(C1-C4)烷基,苯基,硝基,氨基;R3代表氢,卤素,(C1-C4)烷基,苯基,硝基,氨基。对于式III,R1是甲基,苯基,可选地取代一个或两个来自卤素,(C1-C4)烷基,(C1-C4)烷氧基,苯基,硝基,氨基的基团;R4代表氢,羟基,(C1-C4)烷基。本发明还提供了一种成本有效的制备式I-III的方法。式I-III可以通过口服或静脉注射与惰性稀释剂或药用可接受载体一起使用,用于治疗或预防心血管疾病。