A Metal-Free Three-Component Reaction for the Regioselective Synthesis of 1,4,5-Trisubstituted 1,2,3-Triazoles
作者:Joice Thomas、Jubi John、Nikita Parekh、Wim Dehaen
DOI:10.1002/anie.201403453
日期:2014.9.15
three‐component reaction to synthesize 1,4,5‐trisubstituted 1,2,3‐triazoles from readily available building blocks, such as aldehydes, nitroalkanes, and organic azides, is described. The process is enabled by an organocatalyzed Knoevenagel condensation of the formyl group with the nitro compound, which is followed by the 1,3‐dipolar cycloaddition of the azide to the activated alkene. The reaction features an excellent
本文描述了一种无金属的三组分反应,该反应可从容易获得的结构单元(如醛,硝基烷和有机叠氮化物)中合成1,4,5-三取代的1,2,3-三唑。该过程是通过甲酰基与硝基化合物的有机催化的Knoevenagel缩合实现的,然后将叠氮化物进行1,3-偶极环加成反应生成活化的烯烃。该反应具有优异的底物范围,并且以高收率和区域选择性获得产物。该方法可用于合成稠合的三唑杂环和具有几个三唑部分的材料。