Construction of 1,2,4-Triazole Derivatives via Cyclocondensation of Alkylidene Dihydropyridines and Aryldiazonium Salts
作者:Madhur S. Joshi、F. Christopher Pigge
DOI:10.1021/acs.orglett.6b03019
日期:2016.11.18
dearomatization of N-acylated 4-(aminomethyl)pyridines participate in [3 + 2] cyclocondensation reactions with aryldiazonium cations to afford substituted 1,2,4-triazolium salts or neutral 1,2,4-triazoles in high isolated yield. The reaction proceeds in the presence of a variety of N-acyl groups and aryl-susbtituted diazonium salts and offers a general route to pyridyl-substituted 1,2,4-triazoles.
通过N-酰化的4-(氨基甲基)吡啶的脱芳香化反应而制备的亚烷基二氢吡啶(脱水碱)参与芳基重氮阳离子的[3 + 2]环缩合反应,从而获得取代的1,2,4-三唑鎓盐或中性1,2,4-三唑高分离收率。该反应在各种N-酰基和芳基取代的重氮盐的存在下进行,并提供了吡啶基取代的1,2,4-三唑的一般路线。