Catalytic Carbonyl <i>Z</i>-Dienylation via Multicomponent Reductive Coupling of Acetylene to Aldehydes and α-Ketoesters Mediated by Hydrogen: Carbonyl Insertion into Cationic Rhodacyclopentadienes
作者:Jong Rock Kong、Michael J. Krische
DOI:10.1021/ja0664786
日期:2006.12.1
Exposure of aldehydes or alpha-ketoesters to equal volumes of acetylene and hydrogen gas at ambienttemperature and pressure in the presence of cationic rhodium catalysts provides products of carbonyl Z-butadienylation, which arise via multicomponent coupling of four molecules: two molecules of acetylene, a molecule of vicinal dicarbonyl compound, and a molecule of elemental hydrogen. The collective