区域异构体5(7)-氨基-6,7(4,5)-二氢[1,2,4]三唑[1,5- a ] [1,3,5]三嗪的实用合成
摘要:
开发了一种方便而有效的新的5-氮杂嘌呤衍生物的合成方法。区域异构的5-氨基-6,7-二氢和7-氨基-4,5-二氢[1,2,4]三唑[1,5- a ] [1,3,5]三嗪在3-作为领先发现计划的一部分,从苯甲酰肼经过互补和区域专一性路线走4步。使用NMR光谱数据和X射线晶体学研究获得的化合物的分子结构和互变异构偏好。
A convenient method for the synthesis of 7-amino-substituted 1,2,4-triazolo[1,5-a][1,3,5]triazin-5-amines
作者:Anton V. Dolzhenko、Giorgia Pastorin、Anna V. Dolzhenko、Wai Keung Chui
DOI:10.1016/j.tetlet.2008.10.003
日期:2008.12
A new practical synthesis of 7-amino-substituted 1,2,4-triazolo[1,5-a][1,3,5]triazin-5-amines is developed. The triazine ring closure of 5-guanidino-3-phenyt-1,2,4-triazole with trichloroacetonitrile proceeds chemo- and regioselectively depending on the nature of the solvent. Conducting the reaction in toluene provided 7-trichloromethyl-1,2,4-triazolo[1,5-a][1,3,5]triazin-5-amine as the product, which can be further aminated efficiently with replacement of the trichloromethyl group. (C) 2008 Elsevier Ltd. All rights reserved.