Gold(I)-Catalyzed Intermolecular Hydroamination of Allenes with Arylamines
作者:Ross Widenhoefer、Alethea Duncan
DOI:10.1055/s-0029-1218555
日期:2010.2
A mixture of (3)AuCl [3 = P(t-Bu)(2)o-biphenyl] and AgOTf catalyzes the intermolecularhydroamination of monosubstituted and 1,1- and 1,3-disubstituted allenes with primary and secondary arylamines.
A computationally designed titanium-mediated amination of allylic alcohols for the synthesis of secondary allylamines
作者:Zunming Sun、Qingxia Wang、Yi Xu、Zhihong Wang
DOI:10.1039/c5ra18503c
日期:——
A computational design was inspired by previous mechanistic studies and the DFT-guided reactions were implemented in the synthesis of secondary allylamines. The participation of titanium imido intermediates facilitated the reaction and the closed transition states in the bond-forming steps rendered exclusive SN2′ substitution products.
以前的机理研究启发了计算设计,并且在仲烯丙胺的合成中实施了DFT指导的反应。钛亚氨基中间体的参与促进了反应,并且在键形成步骤中的闭合过渡态提供了唯一的S N 2'取代产物。
Palladium-catalyzedreactions of various haloanilines with 1,1-dimethylallyl alcohol were carried out in the presence of a hydrophilic ligand, 3,3′,3′′-phosphinidyne tris(benzenesulfonic acid) trisodium salt (TPPTS), or a lipophilic phosphine ligand, 1,1′-bis(diphenylphosphino)ferrocene (DPPF). The reactions proceeded chemoselectively in aqueous solvent to give C-vinylated products under basic conditions
Direct C–H/N–H dehydrogenative coupling is a promising yet thermodynamically unfavorable transformation in the absence of a sacrificial hydrogen acceptor. Herein, a conceptually novel oxidant-free dehydrogenative amination of alkenes through a synergistic photoredox and cobaltcatalysis with H2 evolution has been achieved. With this approach, a wide range of five-membered N-heterocycles were synthesized