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.
Reactions of 2-Arylcyclohexanones. V. 1-Phenylcyclohexaneethylamine, 1-Methyl-9-phenyl-Δ<sup>7</sup>-hexahydroindole and Related Compounds
作者:W. E. Bachmann、E. J. Fornefeld
DOI:10.1021/ja01145a020
日期:1951.1
The Dienone-Phenol Rearrangement. IV<sup>1</sup>
作者:S. W. Fenton、R. T. Arnold、H. E. Fritz
DOI:10.1021/ja01627a056
日期:1955.11
Regioselectivity and diastereoselectivity in the phase transfer catalysed Michael addition of 2-phenylcyclohexanone
作者:Enrique Díez-Barra、Antonio de la Hoz、Sonia Merino、Prado Sánchez-Verdú
DOI:10.1016/s0040-4039(97)00348-1
日期:1997.3
Regioselectivity and diastereoselectivity in the Michael addition of 2-phenylcyclohexanone to bulky alpha,beta-unsaturated ketones can be controlled by carefully selecting the reaction conditions. Solvent-free solid-liquid PTC using tetrabutylammonium bromide as catalyst and potassium tertbutoxide as base leads to high de (up to 99%) of the 2,6-disubstituted regioisomer, which is, a priori, the unexpected isomer. (C) 1997 Elsevier Science Ltd.