Novel synthesis of 1,4,5-trisubstituted 1,2,3-triazoles via a one-pot three-component reaction of boronic acids, azide, and active methylene ketones
作者:Jian Zhang、Guanyi Jin、Senhan Xiao、Jingjing Wu、Song Cao
DOI:10.1016/j.tet.2012.12.086
日期:2013.3
A series of 1-aryl-5-trifluoromethyl (or difluoromethyl)–1,4,5-trisubstituted 1,2,3-triazoles were synthesized in high yield by a novel one-pot three-component reaction of arylboronic acids, sodium azide, and active methylene ketones, such as ethyl 4,4-difluoroacetoacetate or ethyl 4,4,4-trifluoroacetoacetate in the presence of Cu(OAc)2 and piperidine using a DMSO/H2O (10/1) mixture as solvent.
通过芳基硼酸叠氮化钠的新型一锅三组分反应,高收率合成了一系列1-芳基-5-三氟甲基(或二氟甲基)–1,4,5-三取代的1,2,3-三唑,在DMSO / H 2 O(10/1)混合物为溶剂的情况下,在Cu(OAc)2和哌啶的存在下,使用活性亚甲基酮,例如4,4-二氟乙酰乙酸乙酯或4,4,4-三氟乙酰乙酸乙酯。