Copper-catalyzed synthesis of 1,3,4-trisubstituted and 1,3,4,5-tetrasubstituted pyrazoles via [3+2] cycloadditions of hydrazones and nitroolefins
作者:Chong Shi、Chaowei Ma、Haojie Ma、Xiaoqiang Zhou、Jinhui Cao、Yuxing Fan、Guosheng Huang
DOI:10.1016/j.tet.2016.05.034
日期:2016.7
A highly economical and efficient copper(I)-catalyzed regioselective method for the synthesis of 1,3,4-trisubstituted and 1,3,4,5-tetrasubstituted pyrazoles via [3+2] cycloaddition of hydrazones and nitroolefins has been reported. This process displays excellent applicability with a wide range of substrates under mild conditions.
已经报道了通过economic和硝基烯烃的[3 + 2]环加成反应来合成1,3,4-三取代和1,3,4,5-四取代的吡唑的一种非常经济和高效的铜(I)催化区域选择性方法。在温和的条件下,该方法在各种基材上均显示出极好的适用性。