The catalytic asymmetric alkylation under phase-transfer conditions of various substrates
(enones, α-fluoro ketones, glycine-imines) promoted by chiral quaternary ammonium
salts derived from cinchona alkaloids is described. A solvent-free phase-transfer
catalysis is presented as well as a new type of polymer-supported phase-transfer catalyst
derived from cinchona alkaloids.
phase-transfer catalysis - polymers - Michael addition - fluorine - asymmetric catalysis