1: With titanium(IV) isopropylate; 4 A molecular sieve; (+)-Weinsaeure-diethylester in dichloromethane
T=-20°C; 0.5 h;
2: With tert.-butylhydroperoxide in decane; dichloromethane
T=-20°C; 42 h;
3: With titanium(IV) isopropylate; tert.-butylhydroperoxide
