Synthesis and pharmacological investigation of novel 1-substituted-4-(4-substituted phenyl)-4<i>H</i>-[1,2,4]triazolo[4,3-<i>a</i>]quinazolin-5-ones as a new class of H1-antihistamine agents
作者:V Alagarsamy、Rajani Giridhar、M R Yadav
DOI:10.1211/jpp.58.9.0012
日期:2010.2.18
A series of novel 1-substituted-4-(4-substituted phenyl)-4H-[1,2,4]triazolo[4,3-a]quinazolin-5-ones was synthesized by the cyclization of 2-hydrazino-3-(4-substituted phenyl)-3H-quinazolin-4-one with various one-carbon donors. The starting material, 2-hydrazino-3-(4-substituted phenyl)-3H-quinazolin-4-one, was synthesized from 4-substituted aniline by a novel innovative route. When tested for in-vivo
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-(4-取代的苯基)-4H- [1,2,4]三唑并[4,3-a]喹唑啉-5-酮。 -(4-取代的苯基)-3H-喹唑啉-4-酮,具有各种一碳供体。起始原料2-肼基-3-(4-取代苯基)-3H-喹唑啉-4-酮是通过一种新颖的创新路线由4-取代苯胺合成的。当测试有意识的豚鼠的体内H1-抗组胺活性时,所有测试化合物均能显着保护动物免受组胺诱发的支气管痉挛。化合物1-甲基-4-(4-氯苯基)-4H- [1,2,4]三唑并[4,3-a]喹唑啉-5-酮(VII)更有效(保护度为72.71%),并且当与参考标准,马来酸氯苯那敏(71%保护)。与马来酸氯苯那敏(25%)相比,化合物II和VII的镇静作用可忽略不计(分别为5%和8%)。化合物II和VII可以作为原型分子,作为一类新的H1-抗组胺剂进行进一步开发。