A new, high-yield synthesis of 3-aryl-1,2,4-triazoles
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 phosphoruspentachloride/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