Reactions of α-haloacroleins with azides: highly regioselective synthesis of formyl triazoles
作者:Dongsheng Zhang、Yingzhu Fan、Zhongliang Yan、Yi Nie、Xingquan Xiong、Lizhu Gao
DOI:10.1039/c9gc01129c
日期:——
A general metal-free route to 1,4-disubstituted and 1,4,5-trisubstituted 1,2,3-triazoles was developed. α-Haloacroleins reacted with organic azides in a DMSO/H2O mixture solvent at room temperature to produce 1,4-disubstituted triazoles (up to 99%) with exclusive regioselectivities. This protocol is convenient and scalable with a broad substrate scope including aliphatic and aromatic azides. The resulting
开发了一种通向1,4-二取代和1,4,5-三取代的1,2,3-三唑的无金属路线。在室温下,α-卤代丙烯醛与有机叠氮化物在DMSO / H 2 O混合溶剂中反应,生成具有区域选择性的1,4-二取代三唑(最高99%)。该协议方便且可扩展,具有广泛的底物范围,包括脂肪族和芳香族叠氮化物。所得三唑在C4位上显示醛基,并证明了其合成用途。还鉴定了一种含有非对映体质子的1,2,3-三唑化合物。