l-Menthol as new scaffold for designing chiral phase-transfer catalysts
摘要:
We herein report, a new class of chiral phase-transfer catalysts derived from L-menthol. The moderately good enantioselectivity exhibited by these catalysts have been explained based on single crystal X-ray data and molecular modelling studies. (c) 2005 Elsevier Ltd. All rights reserved.
Cinchona alkaloid phase-transfer catalysts revisited: influence of substituted aryl groups on the enantioselectivity of glycine ester enolate alkylation
摘要:
We report herein, the influence of substituted aryl groups in quaternary ammonium salts derived from cinchona alkaloids on enantioselectivity of the alkylation of glycine ester enolates. (c) 2005 Elsevier Ltd. All rights reserved.