通过可见光光氧化还原催化的催化脱氢(CD)为芳香族化合物的合成提供了一条有效的途径。然而,由于在光催化条件下难以控制胺的反应性,通过可见光诱导的环糊精来获得广泛使用的合成部分的N-芳基胺仍然是一个重大挑战。在这里,可见光诱导光催化合成N-芳基胺是通过烯丙胺的CD实现的。使用C 6 F 5 I作为氢原子受体的不寻常策略使得带有各种官能团和活化C-H键的胺能够温和且受控的CD,从而抑制反应性N-芳基胺产物的副反应。彻底的机理研究表明,单电子和氢原子转移以明确的顺序参与,以在控制反应性方面提供协同效应。值得注意的是,反电子转移过程可防止所需产物在氧化条件下进一步反应。
Transition metal-catalyzed process for addition of amines to carbon-carbon double bonds
申请人:Yale University
公开号:US06384282B2
公开(公告)日:2002-05-07
The present invention is directed to a process for addition of amines to carbon-carbon double bonds in a substrate, comprising: reacting an amine with a compound containing at least one carbon-carbon double bond in the presence a transition metal catalyst under reaction conditions effective to form a product having a covalent bond between the amine and a carbon atom of the former carbon-carbon double bond. The transition metal catalyst comprises a Group 8 metal and a ligand containing one or more 2-electron donor atoms. The present invention is also directed to enantioselective reactions of amine compounds with compounds containing carbon-carbon double bonds, and a calorimetric assay to evaluate potential catalysts in these reactions.
C–N Bond Formation from Allylic Alcohols via Cooperative Nickel and Titanium Catalysis
作者:S. Hadi Nazari、Norma Tiempos-Flores、Kelton G. Forson、Jefferson E. Bourdeau、David J. Michaelis
DOI:10.1021/acs.joc.8b01474
日期:2018.9.7
Amination of allylicalcohols is facilitated via cooperative catalysis. Catalytic Ti(O-i-Pr)4 is shown to dramatically increase the rate of nickel-catalyzed allylic amination, and mechanistic experiments confirm activation of the allylicalcohol by titanium. Aminations of primary and secondary allylicalcohols are demonstrated with a variety of amine nucleophiles. Diene-containing substrates also cyclize
Transition Metal-Catalyzed C-H Amination Using Unactivated Amines
申请人:Warren Timothy H.
公开号:US20110213146A1
公开(公告)日:2011-09-01
One aspect of the invention relates to a method of animation or amidation, comprising the step of combining a substrate, comprising a reactive C—H bond, and an amine or amide, comprising a reactive N—H bond, in the presence of an oxidizing agent and a metal-containing catalyst, thereby forming a product with a covalent bond between the carbon of the reactive C—H bond and the nitrogen of the reactive N—H bond.
A General Nickel-Catalyzed Hydroamination of 1,3-Dienes by Alkylamines: Catalyst Selection, Scope, and Mechanism
作者:Jan Pawlas、Yoshiaki Nakao、Motoi Kawatsura、John F. Hartwig
DOI:10.1021/ja017575w
日期:2002.4.1
of the thermodynamics favoring the reaction of a nickel allyl with an amine to form an allylic amine, the thermodynamics favored reaction of a nickel(0) complex with allylic amine in the presence of acid to form a Ni(II) allyl. The realization of these thermodynamics led us to the discovery that nickel and some palladium complexes in the presence or absence of acid catalyze the exchange of the amino