Jones-reagent in acetone 1 h; Ambient temperature;

1: 1.21 g / from -70 deg C to room temp. 2: 0.49 g / MnO2 / CHCl3 / Ambient temperature View Scheme

n-butyllithium 1) diethyl ether, n-hexane, -78 deg C, 30 min, 2) -78 deg C, 1 h; Yield given. Multistep reaction;

water 1.) tetrahydrofuran, hexane, -65 deg C, 30 min, 2.) tetrahydrofuran, hexan, 25 deg C; Yield given. Multistep reaction. Further byproducts given. Yields of byproduct given;