Novel synthesis of enamines by iridium-catalyzed dehydrogenation of tertiary aminesElectronic supplementary information (ESI) available: detailed experimental procedures and spectroscopic information. See http://www.rsc.org/suppdata/cc/b3/b304357f/
Novel synthesis of enamines by iridium-catalyzed dehydrogenation of tertiary aminesElectronic supplementary information (ESI) available: detailed experimental procedures and spectroscopic information. See http://www.rsc.org/suppdata/cc/b3/b304357f/
作者:Xiawei Zhang、Amy Fried、Spencer Knapp、Alan S. Goldman
DOI:10.1039/b304357f
日期:——
A novel route to enamines is reported, the dehydrogenation of tertiary amines catalyzed by a “pincer-ligated” iridium catalyst.
报道了一种新的获得烯胺的途径,即“三元胺在铱催化剂的“钳状配体”催化下脱氢”。
Catalytic dehydrogenation of cyclooctane and triethylamine using aliphatic iridium pincer complexes
作者:Alexey V. Polukeev、Roman Gritcenko、Klara J. Jonasson、Ola F. Wendt
DOI:10.1016/j.poly.2014.06.016
日期:2014.12
The majority of the known pincer iridium based catalysts for dehydrogenation of alkanes has arene-based backbones. Here, the catalytic activity of aliphatic iridium pincer complexes, viz, the cyclohexane-based phosphine complex (PCyP)IrHCl (4) (PCyP = cis-1,3-bis-[(di-tert-butylphosphino)methyl]cyclohexane}(-)) and the 2-methylpropane-based phosphinite complex (POCOP)IrHCl (5) (POCOP = 1,3-bis-(di-tert-butyl-phosphinito)-2-methylpropane(-)), in dehydrogenation of cyclooctane and triethylamine was studied. They give TONs that are in the range of 0-200. In addition, improved procedures for synthesis and metallation of the PCyP ligand (3) are presented. (C) 2014 Elsevier Ltd. All rights reserved.
Formation of Enamines via Catalytic Dehydrogenation by Pincer-Iridium Complexes
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 kineticisotopeeffects 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-determiningelimination of the β-C-H bond.