?-Methylidene-?-butyrolactones: Synthesis and evaluation of quinolin-2(1H)-one derivatives
作者:Tai-Chi Wang、Yeh-Long Chen、Cherng-Chyi Tzeng、Shorong-Shii Liou、Weng-Feng Tzeng、Ya-Ling Chang、Che-Ming Teng
DOI:10.1002/hlca.19980810517
日期:——
As a continuation of our previous studies on the synthesis and antiplatelet activity of quinolin-2(1H)-ones with an α-methylidene-γ-butyrolactone substituted at O(8), the O(6)- and N(1)-substituted isomers were synthesized and evaluated for antiplatelet activity against thrombin (Thr)-, arachidonic acid (AA)-, collagen (Col)-, and platelet-activating-factor (PAF)-induced aggregation in washed rabbit
作为我们以前的研究的延续,研究了在O(8),O(6)-和N(1)处取代了α-亚甲基-γ-丁内酯的喹啉2(1 H)-ones的合成和抗血小板活性合成了取代的异构体,并评估了在洗涤后的兔血小板中对凝血酶(Thr)-,花生四烯酸(AA)-,胶原蛋白(Col)-和血小板活化因子(PAF)诱导的聚集的抗血小板活性。这些化合物是由6-羟基喹啉-2(1 H)-一经烷基化和Reformatsky型缩合反应合成的(流程1和2)。发现它们均能完美抑制由AA和6号取代的异构体5b诱导的血小板凝集– g对AA和PAF诱导的聚集表现出非常强的抑制活性,并且其效力是其8取代类似物的约十倍。然而,1-取代的(11a和11b)和1,6-二取代的(6)对应物相对没有活性。还评估了它们对高K +诱导的Ca 2+依赖性血管收缩的影响,以及去甲肾上腺素(NE)在大鼠主动脉中诱导的阶段性和强直性血管收缩的作用。除5g外,所有这些均