Synthesis and Thromboxane A2 Antagonistic Activity of ((1-Aryl(or Benzyl)-1-(benzenesulfonamido)methyl)phenyl)alkanoic Acid Derivatives.
作者:Shuniciro SAKURAI、Nobuo OGAWA、Tomio SUZUKI、Ken-ichi KATO、Tetsuo OHASHI、Shingo YASUDA、Hideo KATO、Yasuo ITO
DOI:10.1248/cpb.44.765
日期:——
In order to find new antiasthematic and antithrombotic agents, various [[1-aryl(or benzyl)-1-(benzenesulfonamido)methyl]phenyl]alkanoic acids derivatives were synthesized. Evaluation of these compounds for thromboxane A2 (TXA2) antagonistic activities indicated that 4-[4-[(4-chlorobenzenesulfonamido)phenylmethyl]phenyl]butyric acid (6h), 4-[4-[1-(4-chlorobenzenesulfonamido)-2-phenylethyl]butyric acid (6y) and many other compounds have potent inhibitory effects on U-46619-induced guinea-pig platelet aggregation. No significant difference in the inhibitory effect between (+)-6h and its antipode could be detected, although (+)-6y was about 10 times more potent than (-)-6y. The pKb values of 6h and 6y were estimated to be 8.9 and 10, respectively on U-46619-induced contraction of guinea-pig trachea as a pharmacological measure of TXA2 antagonistic activity. These compounds also showed potent inhibitory effects on U-46619-induced bronchoconstriction in guinea-pig after oral administration in vivo. They were also evaluated for other related pharmacological effects involving the arachidonic acid cascade. It ws found that these compounds possess TXA2 synthase inhibitory activity together with TXA2 antagonistic activity, and 6h also possesses weak leukotriene D4 (LTD4) antagonistic acitivity. Structure-activity relationships for TXA2 antagonistic activity of these derivatives are discussed.
为了寻找新的抗静血和抗血栓药物,人们合成了各种[[1-芳基(或苄基)-1-(苯磺酰胺基)甲基]苯基]烷酸衍生物。对这些化合物的血栓素 A2(TXA2)拮抗活性评估表明,4-[4-[(4-氯苯磺酰胺基)苯基甲基]苯基]丁酸(6h)、4-[4-[1-(4-氯苯磺酰胺基)-2-苯基乙基]丁酸(6y)和许多其他化合物对 U-46619 诱导的豚鼠血小板聚集具有强效抑制作用。尽管(+)-6y 的抑制作用是(-)-6y 的 10 倍左右,但(+)-6h 与其反式之间的抑制作用并无明显差异。在 U-46619 诱导的豚鼠气管收缩中,作为 TXA2 拮抗活性的药理学指标,6h 和 6y 的 pKb 值分别为 8.9 和 10。这些化合物在体内口服后,对 U-46619 诱导的豚鼠支气管收缩也有很强的抑制作用。还对涉及花生四烯酸级联的其他相关药理作用进行了评估。结果发现,这些化合物具有 TXA2 合酶抑制活性和 TXA2 拮抗活性,6h 还具有微弱的白三烯 D4(LTD4)拮抗活性。本文讨论了这些衍生物 TXA2 拮抗活性的结构-活性关系。