hydrogen; palladium on activated charcoal in ethyl acetate Ambient temperature;

1: H2 / 10percent Pd-C / ethyl acetate / Ambient temperature 2: 1) lithium diisopropylamide / 1) THF, hexane, -78 deg C, 1 h, 2) THF, r.t., 3 h 3: 86 percent / m-chloroperbenzoic acid / CH2Cl2 / 3 h / -78 °C 4: CaCO3 / CCl4 / 46 h / 65 °C View Scheme