Synthesis and pharmacological investigation of novel 4-(2-methylphenyl)-1-substituted-4H-[1,2,4]triazolo[4,3-a]quinazolin-5-ones as new class of H1-antihistaminic agents
作者:V. Alagarsamy、M. Rupeshkumar、K. Kavitha、S. Meena、D. Shankar、A.A. Siddiqui、R. Rajesh
DOI:10.1016/j.ejmech.2007.10.001
日期:2008.11
enyl)-4H-[1,2,4]triazolo[4,3-a]quinazolin-5-one (II) emerged as the most active compound of the series and it is more potent (72.45%) when compared to the reference standard chlorpheniramine maleate (71%). Compound II showed negligible sedation (11%) when compared to chlorpheniramine maleate (30%). Hence it could serve as the prototype molecule for further development as a new class of H(1)-antihistaminic
通过2-肼基-3-的环化反应,合成了一系列新型的1-取代的4-(2-甲基苯基)-4H- [1,2,4]三唑并[4,3-a]喹唑啉-5-酮。具有各种一个碳供体的(2-甲基苯基)-3H-喹唑啉-4-酮。起始原料2-肼基-3-(2-甲基苯基)-3H-喹唑啉-4-酮是由2-甲基苯胺通过新颖的合成途径合成的。测试了标题化合物对豚鼠的体内H(1)-抗组胺活性;所有测试的化合物均能显着保护动物免受组胺诱导的支气管痉挛的侵害。化合物1-甲基-4-(2-甲基苯基)-4H- [1,2,4]三唑并[4,3-a]喹唑啉-5-酮(II)成为该系列中最具活性的化合物与参比标准马来酸氯苯那敏(71%)相比,效价更高(72.45%)。与马来酸氯苯那敏(30%)相比,化合物II的镇静作用可忽略不计(11%)。因此,它可以作为进一步发展的原型分子,作为一类新的H(1)-抗组胺药。