Base-mediated [3+2] annulation of trifluoroacetimidoyl chlorides and isocyanides: An improved approach for regioselective synthesis of 5-trifluoromethyl-imidazoles
作者:Sipei Hu、Hefei Yang、Zhengkai Chen、Xiao-Feng Wu
DOI:10.1016/j.tet.2020.131168
日期:2020.5
A t-BuOK-mediated [3 + 2] cycloaddition reaction of trifluoroacetimidoyl chlorides and active methylene isocyanides for the synthesis of 5-trifluoromethyl-imidazoles has been developed. Under mild reaction conditions, the transformation proceeds smoothly in the presence of t-BuOK to afford an array of structurally diverse 5-trifluoromethyl-imidazoles with high efficiency.
已经开发了由t -BuOK介导的三氟乙酰亚胺基氯与活性亚甲基异氰酸酯的[3 + 2]环加成反应,用于合成5-三氟甲基-咪唑。在温和的反应条件下,在t- BuOK存在下,转化过程平稳进行,从而高效地提供了一系列结构多样的5-三氟甲基-咪唑。