1: NaBH4 / methanol / 13 h / Ambient temperature 2: NaOH / methanol; H2O / 3 h / Ambient temperature 3: 4.3 molpercent RhH(CO)(PPh3)3 / benzene / 8 h / 80 °C / sealed tube; different 1,3-diene monoepoxides and catalysts View Scheme