Contemporaneous Dual Catalysis by Coupling Highly Transient Nucleophilic and Electrophilic Intermediates Generated in Situ
作者:Barry M. Trost、Xinjun Luan
DOI:10.1021/ja110501v
日期:2011.2.16
contemporaneous dualcatalysis, that selectively couples two highly reactive catalytic intermediates while overcoming competing trapping by stoichiometric reactive species also present in the reaction. The reaction proceeds via the convergence of a vanadium-catalyzed propargylic rearrangement and a palladium-catalyzedallylicalkylation. It generates a variety of α-allylated α,β-unsaturatedketones, which are
Ruthenium-Catalyzed Allylation-Cyclization Reactions of Cyclic 1,3-Dicarbonyl Compounds with 1-Vinyl Propargyl Alcohols
作者:Anita Jonek、Stefanie Berger、Edgar Haak
DOI:10.1002/chem.201202414
日期:2012.11.26
Ruthenium‐catalyzed allylation–cyclization reactions of cyclic 1,3‐dicarbonyl compounds with 1‐vinyl propargyl alcohols that lead to diverse carbo‐ or heterocyclic products in a one‐pot cascade process are reported. These mechanistically distinct reactions are catalyzed by a single ruthenium(0) complex that contains a redox‐coupled dienone ligand. The reaction pathway strongly depends on the substrate
Regiocontrolled Ruthenium-Catalyzed Isomerization of Propargyl Alcohols
作者:Edgar Haak、Steffen Skowaisa
DOI:10.1055/a-2288-3074
日期:2024.11
ruthenium complex allows control of regioselectivity in the ruthenium-catalyzed isomerization of propargyl alcohols through the choice of additive. Thereby, both products of the Meyer–Schuster rearrangement and redox isomerization products are selectively accessible. In the presence of hydroxylamine-O-sulfonic acid, unsaturated nitriles are formed instead. The ruthenium catalyst is readily available and