Metal-free [2 + 1 + 3] Cycloaddition of Trifluoroacetaldehyde <i>N</i>-Sulfonylhydrazones with Hexahydro-1,3,5-triazines Leading to Trifluoromethylated 2,3,4,5-Tetrahydro-1,2,4-triazines
作者:Zhongxue Fang、Qihao Jin、Xinyu Wang、Yongquan Ning
DOI:10.1021/acs.joc.1c02810
日期:2022.3.4
A transition-metal-free [2 + 1 + 3] cycloaddition of trifluoroacetaldehyde N-sulfonylhydrazone and hexahydro-1,3,5-triazine was described. This operationally simple protocol provides a general synthesis of diverse trifluoromethylated 2,3,4,5-tetrahydro-1,2,4-triazines in 81–97% yield with a broad substrate scope, including aryl, benzyl, and alkyl hexahydro-1,3,5-triazine.
描述了三氟乙醛N-磺酰腙和六氢-1,3,5-三嗪的无过渡金属 [2 + 1 + 3] 环加成反应。这种操作简单的方案提供了多种三氟甲基化 2,3,4,5-四氢-1,2,4-三嗪的一般合成,产率 81-97%,底物范围广泛,包括芳基、苄基和烷基六氢-1 ,3,5-三嗪。