作者:Yansong J. Lu、Xiawei Zhang、Santanu Malakar、Karsten Krogh-Jespersen、Faraj Hasanayn、Alan S. Goldman
DOI:10.1021/acs.joc.9b02846
日期:2020.3.6
lesser crowding of the di-isopropylphosphino-substituted catalysts. Experimentally determined kinetic isotope effects in conjunction with DFT-based analysis support a dehydrogenation mechanism involving initial pre-equilibrium oxidative addition of the amine α-C-H bond followed by rate-determining elimination of the β-C-H bond.
发现二异丙基膦基取代的夹钳连接的铱催化剂对于简单叔胺的脱氢以产生烯胺比先前报道的二叔丁基膦基取代的物种明显更有效。还发现,二异丙基膦基取代的配合物催化几种β-官能化叔胺的脱氢反应,得到相应的1,2-二官能化烯烃。二叔丁基膦基取代的物质对这种底物无效;据推测,明显的差异归因于二异丙基膦基取代的催化剂较少的拥挤。