Yttrium‐Catalyzed Intermolecular Anti‐Markovnikov Hydroamination and Sequential Intermolecular Hydroamination/Endocyclization of Vinylsilanes
作者:Lara H. Polak、John B. Soltys、Kai C. Hultzsch
DOI:10.1002/adsc.202300862
日期:2023.12.5
The intermolecular anti-Markovnikov hydroamination of vinylsilanes was achieved utilizing five silyl-substituted ortho-terphenoxide yttrium complexes. The highest activity was observed for the most sterically encumbered triphenylsilyl-substituted complex. Excellent activity and complete anti-Markonikov selectivity were obtained for a variety of benzylic and aliphatic primary and secondary amines. Interestingly
利用五个甲硅烷基取代的邻三联苯醚钇配合物实现了乙烯基硅烷的分子间反马尔可夫尼科夫氢胺化。对于空间位阻最大的三苯基甲硅烷基取代的络合物,观察到最高的活性。对多种苄基和脂肪族伯胺和仲胺均具有优异的活性和完全的抗马可尼科夫选择性。有趣的是,与2-甲基吡啶胺的反应产生加氢氨基烷基化产物而不是加氢胺化产物。二甲基二乙烯基硅烷通过连续氢胺化/内环化反应产生一系列 1,4-氮杂硅烷,收率良好。