Catalytic asymmetric alkylation of α-cyanocarboxylates and acetoacetates using a phase-transfer catalyst
摘要:
The catalytic asymmetric alkylation of alpha-cyanocarboxylates and acetoacetates with an alkyl halide was performed under phase-transfer conditions to afford compounds which have a chiral quaternary carbon with up to 97% and 94% ee, respectively. As applications of this method, chiral 2-oxindole derivatives and a beta-lactam derivative were synthesized. (C) 2009 Elsevier Ltd. All rights reserved.
The catalytic asymmetric alkylation of alpha-cyanocarboxylates and acetoacetates with an alkyl halide was performed under phase-transfer conditions to afford compounds which have a chiral quaternary carbon with up to 97% and 94% ee, respectively. As applications of this method, chiral 2-oxindole derivatives and a beta-lactam derivative were synthesized. (C) 2009 Elsevier Ltd. All rights reserved.