Ruthenium-Catalyzed Reaction of α,β-Unsaturated Imines with Carbon Monoxide and Alkenes Leading to β,γ-Unsaturated γ-Butyrolactams: Involvement of Direct Carbonylation at Olefinic C−H Bonds as a Key Step
作者:Naoto Chatani、Akihito Kamitani、Shinji Murai
DOI:10.1021/jo026001m
日期:2002.10.1
The reaction of alpha,beta-unsaturated imines with CO and alkenes in the presence of Ru(3)(CO)(12) as a catalyst results in a three-component coupling reaction that gives alpha,alpha-disubstituted beta,gamma-unsaturated gamma-butyrolactams. The reaction proceeds via a two-step sequence involving the initial formation of ketone derivatives by catalytic carbonylation at the beta-olefinic C-H bonds of
The First Catalytic Carbonylative [4 + 1] Cycloaddition Using a 1,3-Conjugated System. A New Transformation of α,β-Unsaturated Imines to Unsaturated γ-Lactams Catalyzed by Ru<sub>3</sub>(CO)<sub>12</sub>
作者:Tsumoru Morimoto、Naoto Chatani、Shinji Murai
DOI:10.1021/ja983546i
日期:1999.3.1
Secondary Products from Intramolecular Cycloadditions of Azidoalkyl Enol Ethers and Azidoalkyl Vinyl Bromides: 1-Azadienes, Their Reactions with Diphenylketene, and Radical Cyclizations To Form Bi- and Tricyclic Lactams
作者:John T. R. Liddon、Peter J. Lindsay-Scott、Jeremy Robertson
DOI:10.1021/acs.joc.9b02005
日期:2019.11.1
cycloadducts formed by heating analogous azidoalkyl vinyl bromides are unstable with respect to elimination of N2 and HBr, affording 1-azadienes (2-alkenyl cyclic imines). These primary products may be isolated or treated directly with diphenylketene to produce bi- and tricyclic 3,4-dihydropyridin-2(1H)-ones; similar ring systems may also be produced from the azadienes by N-acylation and radical cyclization