1,3-Dihydro-2H-imidazo[4,5-b]quinolin-2-ones - inhibitors of blood platelet cAMP phosphodiesterase and induced aggregation
作者:Nicholas A. Meanwell、Herbert R. Roth、Edward C. R. Smith、Donald L. Wedding、J. J. Kim Wright、J. Stuart Fleming、Elizabeth Gillespie
DOI:10.1021/jm00113a033
日期:1991.9
5-b]quinolin-2-one derivatives was synthesized and evaluated as inhibitors of cAMP hydrolysis by a crude human platelet phosphodiesterase preparation and as inhibitors of ADP- and collagen-induced aggregation of rabbit blood platelets. The parent structure 7a, demonstrated potent inhibitory activity that was enhanced by the introduction of alkyl, alkoxy, or halogen substituents at the 5-, 6-, 7-, and 8-positions
合成了一系列1,3-二氢-2H-咪唑并[4,5-b]喹啉-2-酮衍生物,并作为粗制人血小板磷酸二酯酶制剂对cAMP水解的抑制剂以及对ADP-和胶原-抑制剂的评估。诱导兔血小板聚集。母体结构7a显示出有效的抑制活性,其通过在5-,6-,7-和8-位上引入烷基,烷氧基或卤素取代基而增强。N-1或N-3处的甲基化产生较弱的cAMP PDE抑制剂和血小板聚集。发现1,3,9,9a-四氢-2H-咪唑并[4,5-b]喹啉-2-酮(6)与它们的完全氧化同类物(7)等价。根据体外的血小板抑制特性,在血栓形成动物模型中预防血栓形成的功效以及良好的血液动力学特征,即1,3-二氢-7,选择8-二甲基-2H-咪唑并[4,5-b]喹啉-2-酮(7o,BMY 20844)进行毒理学评估和临床试验。描述了7o的有效合成。