1: With 4-methylmorpholine N-oxide in dichloromethane T=-65°C; Jacobsen Asymmetric Epoxidation; Inert atmosphere; 2: With 3-chloro-benzenecarboperoxoic acid in ethanol; dichloromethane T=-65°C; Jacobsen Asymmetric Epoxidation; Inert atmosphere; SolventTemperatureReagent/catalystConcentration; enantioselective reaction;