A general route to 1,5-disubstituted 1,2,3-triazoles with alkyl/alkyl, alkyl/aryl, aryl/aryl combinations: a metal-free, regioselective, one-pot three component approach
作者:Santu Dey、Tanmaya Pathak
DOI:10.1039/c3ra47062h
日期:——
An experimentally simple one-pot reaction, affording 1,5-disubstituted 1H-1,2,3-triazoles in good to excellent yields by combining vinyl sulfones, sodium azide and alkyl bromides, -tosylates, -mesylates or aryl amines, -iodides is reported. The organic azides, generated in situ react with vinyl sulfones in a regioselective fashion in the absence of metal ions. Unlike many of the recently reported strategies, this method is capable of generating alkyl/alkyl, alkyl/aryl and aryl/aryl containing 1,5-disubstituted 1,2,3-triazoles under simple reaction conditions.
本报告介绍了一种实验简单的一锅反应,通过将乙烯基砜、叠氮化钠和烷基溴化物、-对甲苯磺酸盐、-甲磺酸盐或芳基胺、-碘化物结合在一起,可以得到 1,5-二取代的 1H-1,2,3-三唑,收率从良好到极佳。在没有金属离子的情况下,原位生成的有机叠氮化物以区域选择性的方式与乙烯基砜发生反应。与最近报道的许多策略不同,这种方法能够在简单的反应条件下生成烷基/烷基、烷基/芳基和芳基/芳基的 1,5 二甲基 1,2,3 三唑。