The effect of phosphine ligands on the palladium catalyzed enone formation from allyl β-keto esters, alkenyl allyl carbonates, silyl enolethers, and enolacetates has been reinvestigated, and clean enone formation was observed by a phosphine-free palladium catalyst.
New synthetic methods for α,β -unsaturated ketones, aldehydes, esters and lactones by the palladium-catalyzed reactions of silyl enol ethers, ketene silyl acetals, and enol acetates with allyl carbonates
Silyl enol ethers and ketenesilylacetals derived from ketones, aldehydes, esters and lactones are converted into α,β-unsaturated ketones, aldehydes, esters and lactones by treatment with allyl carbonates in high yields using the palladium—bis(diphenylphosphino)ethane (dppe) complex as catalyst. Phosphine-free palladium catalyst instead of the palladium—phosphine complex gives a higher selectivity
One-step synthesis of α,β-unsaturated ketones by the reaction of enol acetates with allyl methyl carbonate catalyzed by palladium and tin compounds
作者:Jiro Tsuji、Ichiro Minami、Isao Shimizu
DOI:10.1016/s0040-4039(00)94161-3
日期:1983.1
Enol acetates derived from saturated ketones are converted to α,β-unsaturated ketones by heating with allyl methyl carbonate in MeCN by bimetallic catalysis of palladium-phosphine complex and tin methoxide.
Regiospecific synthesis of α-arylsulfonoxy ketones from ketone derivatives
作者:Robert V Hoffman、C.Sean Carr
DOI:10.1016/s0040-4039(00)85333-2
日期:1986.1
Isomeric enol ester, enamine, and silyl enol ether derivatives of unsymmetrical ketones are converted regiospecifically to α-arylsulfonoxy ketones with arylsulfonyl peroxides.