tert.-butylhydroperoxide; 3 A molecular sieve; zirconium tetra-n-propoxide in dichloromethane 17 h;

acetyl chloride 1.) isopropanol, 40 deg C, 5 min, 2.) isopropanol, THF, -40 deg C, 4 5 min; Yield given. Multistep reaction. Yields of byproduct given;