1.1: lithium aluminium tetrahydride / diethyl ether / 16 h / 0 °C / Inert atmosphere; Cooling with ice; Reflux 1.2: pH 3 / Acidic aqueous solution 2.1: Dess-Martin periodane / dichloromethane / Inert atmosphere View Scheme

1: With lithium aluminium tetrahydride in diethyl ether T=0°C; 16 h; Inert atmosphereCooling with iceReflux; 2: in diethyl ether pH=3; Acidic aqueous solution;