SEARCH Articles Figures Tables Asymmetric epoxidation Asymmetric epoxidation catalyzed by novel azacrown ether-type chiral quaternary ammonium salts under phase-transfer catalytic conditions Asymmetric epoxidation phase-transfer catalysis Asymmetric epoxidation under phase-transfer catalytic Asymmetric phase-transfer Asymmetric transfer Epoxidations, asymmetric Epoxides asymmetric epoxidation Phase epoxidation