Synthesis and Evaluation of ?-Methylidene-?-butyrolactone bearing flavone and xanthone moieties
作者:Cherngy-Chyi Tzeng、Yue-Ling Zhao、Yeh-Long Chen、Shorong-Shii Liou、Tai-Chi Wang、Ya-Ling Chang、Che-Ming Teng
DOI:10.1002/hlca.19970800806
日期:1997.12.15
In a search for inhibitors of platelet aggregation, a number of α-methylidene-γ-butyrolactones 5 and 6 bearing flavone or xanthone moieties, respectively, were synthesized and evaluated for their antiplatelet activity against thrombin(Thr)-, arachidonic-acid(AA)-, collagen(Col)−, and platelet-activating-factor(PAF)-induced aggregation in washed rabbit platelets. These compounds were synthesized from
在寻找血小板聚集抑制剂时,分别合成了多个带有黄酮或one吨酮基团的α-亚甲基-γ-丁内酯5和6,并评估了它们对凝血酶(Thr)-,花生四烯酸(AA)的抗血小板活性。 ),胶原蛋白(Col)-和血小板活化因子(PAF)诱导的兔兔血小板聚集。这些化合物是由7-羟基黄酮(1)或3-羟基黄酮(2)通过O-烷基化(分别为3和4)和Reformatsky型缩合反应(方案)合成的。大部分含有黄酮的α-亚甲基-γ-丁内酯5a– d对AA和Col诱导的聚集显示出有效的抗血小板作用,而发现蒽酮衍生物6c – e与仅抑制AA诱导的聚集的阿司匹林具有相同的药理作用(表1)。然而,6c – e的效力比阿司匹林高约三到十倍(表2)。对于血管舒张作用,5a是唯一对高K +介质,Ca 2+诱导的血管收缩具有显着抑制活性的化合物(表3)。这两个5A和6A,在内酯的C(γ)处带有脂族Me取代基,对去甲肾上腺素引起的相变和张力