作者:Antonio Guirado、Libertad López-Caracena、José I. López-Sánchez、José Sandoval、María Vera、Delia Bautista、Jesús Gálvez
DOI:10.1016/j.tet.2016.10.045
日期:2016.12
A convenient new synthetic approach to 3-aryl-1,2,4-triazoles has been developed. Chloralamides were obtained by high yield reactions between benzamides and chloral hydrate. These reacted with a phosphorus pentachloride/phosphorus oxychloride mixture undergoing a near quantitative conversion to N-(1,2,2,2-tetrachloroethyl)benzimidoyl chlorides, which were treated with hydrazine hydrate to directly
已经开发了一种方便的合成3-芳基-1,2,4-三唑的新方法。氯酰胺是通过苯甲酰胺和水合氯醛之间的高收率反应获得的。它们与五氯化磷/三氯氧化磷混合物反应,几乎定量转化为N用水合肼处理-(1,2,2,2-四氯乙基)苯甲酰氯,以高产率到定量产率直接得到3-芳基-1,2,4-三唑。这些产物的形成涉及双重缩合过程,然后是氯仿的自发β-消除。通过X射线晶体学测定1-(4-氯苯甲酰基)-3-(4-甲氧基苯基)-1,2,4-三唑的分子结构。通过从头算,密度泛函进行了通过氯仿消除3-芳基-5-三氯甲基-1,2,4-三唑啉芳构化并确定3-苯基-1,2,4-三唑互变异构体的相对稳定性的理论计算研究(B3LYP),Moller–Plesset(MP2)和热化学配方T1。