High-yielding synthesis of N -triazolyl carboxamides via palladium-catalysed aminocarbonylation
作者:Máté Gergely、Borbála Boros、László Kollár
DOI:10.1016/j.tet.2017.10.017
日期:2017.11
Aminocarbonylation of alkenyl and aryl iodides in the presence of 4-amino-4H-1,2,4-triazole as N-nucleophile was carried out in the presence of palladium catalysts. Both types of substrates have shown high chemoselectivity toward carboxamides, i.e. practically no double carbon monoxide insertion resulting in 2-ketocarboxamides took place. The results have been rationalised on the basis of mechanistic
在4-氨基-4H -1,2,4-三唑作为N-亲核试剂存在下,烯基和芳基碘化物的氨基羰基化反应在钯催化剂的存在下进行。两种类型的底物均显示出对羧酰胺的高化学选择性,即。实际上,没有发生一氧化碳双插入导致2-酮羧酰胺发生的情况。结果已根据氨基羰基化的机理进行了合理化。