1: With [Pd(S,S-chiraphos)(PhCN)2](SbF6)2; water in acetone T=10°C; 24 h; Inert atmosphere; 2: With bis(trimethylsilyl)-peroxide; tin(IV) chloride in n-heptane; dichloromethane T=0 - 20°C; Inert atmosphere; optical yield given as percent eeenantioselective reaction;