Regiospecific Aza-Michael Addition of 4-Aryl-1H-1,2,3-triazoles to Chalcones: Synthesis of 2,4-Disubstituted 1,2,3-Triazoles in Basic Medium
作者:Rama Peddinti、Ujjawal Bhagat
DOI:10.1055/s-0036-1588567
日期:2018.1
and base-mediated method to display the donor ability of 1,2,3-triazoles for the synthesis of 2,4-disubstituted 1,2,3-triazoles has been developed. A DABCO-promoted aza-Michael addition of 4-aryl NH-1,2,3-triazoles to α,β-unsaturated ketones (chalcones) is presented. The reactions proceeded with complete regiospecificity in a 3:1 mixture of acetonitrile and methanol at 85 °C to provide 2,4-disubstituted
已开发出一种新的无金属和碱介导的方法,以显示 1,2,3-三唑合成 2,4-二取代 1,2,3-三唑的供体能力。介绍了 DABCO 促进的 4-芳基 NH-1,2,3-三唑与 α,β-不饱和酮(查耳酮)的氮杂-迈克尔加成。在 85 °C 的乙腈和甲醇的 3:1 混合物中,反应以完全区域特异性进行,得到 2,4-二取代的 1,2,3-三唑作为迈克尔加合物,加成产物 1,3-二芳基-(4 -芳基-2H-1,2,3-三唑-2-基)丙-1-酮以高产率分离。