Synthesis and Antiplatelet Activities of N-Arylmethyl-3,4-dimethylpyrano(2,3-c)pyrazol-6-one Derivatives.
作者:Li-Jiau HUANG、Mann-Jen HOUR、Che-Ming TENG、Sheng-Chu KUO
DOI:10.1248/cpb.40.2547
日期:——
A series of new 1- and 2-arylmethyl-3, 4-dimethylpyrano[2, 3-c]pyrazol-6-one derivatives were synthesized and examined for their antiplatelet activities. Some of these compounds showed significant inhibitory activities. Among them, 1-phenylmethyl-3, 4-dimethylpyrano[2, 3-c]pyrazol-6(1H)-one (4a), 2-(2'-methoxyphenyl)methyl-3, 4-dimethyl-pyrano[2, 3-c]pyrazol-6(2H)-one (3e) and 2-(3'-methoxyphenyl)methyl-3, 4-dimethylpyrano[2, 3-c]pyrazol-6-(2H)-one (3f) were the most effective. These inhibitors acted in a consentration-dependent manner. The antiplatelet effect of compound 3f is due to the inhibition of thromboxane A2 formation and the blockade of thromboxane A2/prostaglandin endoperoxide receptor in washed rabbit platelets.
研究人员合成了一系列新的 1-和 2-芳基甲基-3, 4-二甲基吡喃并[2, 3-c]吡唑-6-酮衍生物,并考察了它们的抗血小板活性。其中一些化合物显示出明显的抑制活性。其中,1-苯基甲基-3, 4-二甲基吡喃并[2, 3-c]吡唑-6(1H)-酮(4a)、2-(2'-甲氧基苯基)甲基-3, 4-二甲基吡喃并[2, 3-c]吡唑-6(2H)-酮(3e)和 2-(3'-甲氧基苯基)甲基-3, 4-二甲基吡喃并[2, 3-c]吡唑-6-(2H)-酮(3f)最为有效。这些抑制剂的作用方式与浓度有关。化合物 3f 的抗血小板作用是由于抑制了血栓素 A2 的形成,并阻断了水洗兔血小板中的血栓素 A2/前列腺素内过氧化物受体。