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.
Pseudoenzymatic catalyst–substrate interactions in ion-pair mediated chiral phase transfer catalysis
作者:Apurba Bhattacharya、Tomas Vasques、Thomas Ramirez、Robert Erik Plata、Jiejun Wu
DOI:10.1016/j.tetlet.2006.05.099
日期:2006.7
Complementary electronic effects between the substrate and the cinchona-based catalyst in the pseudoenzymatic ion-pair mediated chiral phase transfer alkylations of indanone enolate anions were demonstrated. (c) 2006 Elsevier Ltd. All rights reserved.
Chiral Michael addition: methyl vinyl ketone addition catalyzed by Cinchona alkaloid derivatives
作者:Robin S. E. Conn、Alfred V. Lovell、Sandor Karady、Leonard M. Weinstock