Practical synthesis of regioisomeric 5(7)-amino-6,7(4,5)-dihydro[1,2,4]triazolo[1,5-a][1,3,5]triazines
作者:Anton V. Dolzhenko、Anna V. Dolzhenko、Wai-Keung Chui
DOI:10.1016/j.tet.2007.10.046
日期:2007.12
A convenient and efficient synthesis of new 5-azapurine derivatives was developed. The regioisomeric 5-amino-6,7-dihydro- and 7-amino-4,5-dihydro[1,2,4]triazolo[1,5-a][1,3,5]triazines were prepared in 3–4 steps from benzhydrazide via complementary and regiospecific routes as a part of our lead finding program. The molecular structures and tautomeric preferences of the compounds obtained were investigated
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。