A Method for the Asymmetric Hydrosilylation of N-Aryl Imines
摘要:
[GRAPHICS]The asymmetric reduction of N-aryl imines to yield chiral amines with enantiomeric excesses above 90% was achieved. Ethylenebis(eta(5)-tetrahydroindenyl)titanium difluoride ((EBTHI)TiF2, 1) was employed as the precatalyst with polymethylhydrosiloxane (PMHS) as the stoichiometric reducing agent. A variety of N-aryl imines derived from nonaromatic ketones were reduced with high ee.
Selective Radical–Radical Cross-Couplings: Design of a Formal β-Mannich Reaction
作者:Jenna L. Jeffrey、Filip R. Petronijević、David W. C. MacMillan
DOI:10.1021/jacs.5b05376
日期:2015.7.8
organocatalysis. Transient β-enaminyl radicals derived from ketones via enamine and oxidative photoredox catalysis readily combine with persistent α-amino radicals in a highly selective hetero radical-radical coupling. This novel pathway to γ-aminoketones is predicated upon the use of DABCO as both a base and an electron transfer agent. This protocol also formally allows for the direct synthesis of
[EN] CATALYST COMPOUNDS<br/>[FR] COMPOSÉS DE TYPE CATALYSEUR
申请人:UNIV LIVERPOOL
公开号:WO2013153408A1
公开(公告)日:2013-10-17
The present invention relates to an iridium-based catalyst compound for hydrogenating reducible moieties, especially imines and iminiums, the catalyst compounds being defined by the formula: (Formula (I)) where ring B is a conjugated ring system with one or more substituents. The catalysts of the invention are particularly effective in reductive amination procedures which involve the in situ generation of the imine or iminium under reductive hydrogenative conditions.
A Method for the Asymmetric Hydrosilylation of <i>N</i>-Aryl Imines
作者:Marcus C. Hansen、Stephen L. Buchwald
DOI:10.1021/ol005583w
日期:2000.3.1
[GRAPHICS]The asymmetric reduction of N-aryl imines to yield chiral amines with enantiomeric excesses above 90% was achieved. Ethylenebis(eta(5)-tetrahydroindenyl)titanium difluoride ((EBTHI)TiF2, 1) was employed as the precatalyst with polymethylhydrosiloxane (PMHS) as the stoichiometric reducing agent. A variety of N-aryl imines derived from nonaromatic ketones were reduced with high ee.
A highly active cyclometallated iridium catalyst for the hydrogenation of imines
A cyclometallated iridium complex containing an imino ligand has been shown to catalyse the hydrogenation of imines. The catalyst is highly active and selective for imino bonds, with a wide variety of imines being hydrogenated in less than 1 hour at a substrate/catalyst (S/C) ratio of 2000 at 20 bar H2 pressure and 75 °C.
已显示含有亚氨基配体的环金属化铱络合物可催化亚胺的氢化。该催化剂具有很高的活性,对亚氨基键具有选择性,在20 bar H 2的压力和75°C下,各种亚胺在2000的底物/催化剂(S / C)比不到1小时的时间内就可以氢化。