A study on the phase transfer catalysed Michael addition
作者:Enrique Díez-Barra、Antonio de la Hoz、Sonia Merino、Ana Rodríguez、Prado Sánchez-Verdú
DOI:10.1016/s0040-4020(97)10391-x
日期:1998.2
Solvent-free and liquid-liquid PTC conditions have been used for the Michaeladdition of several enolates to methyl vinyl ketone, chalcone and methyl acrylate. The solvent-free technique affords high yields whereas the liquid-liquid procedure is less efficient but allows enantioselective reactions.
Efficient Organocatalytic Michael Addition Reaction of β−Ketoesters under High Pressure
作者:Hiyoshizo Kotsuki、Maya Moritaka、Keiji Nakano
DOI:10.3987/com-13-12818
日期:——
The Michael addition reaction of beta-ketoesters was efficiently promoted by a cooperative dual catalyst system composed by DMAP and thiourea A under high-pressure conditions (0.8 GPa) in toluene. The expected relatively congested adducts of 1,5-dicarbonyl compounds were prepared in high to excellent yield.