in water; acetonitrile T=20°C; 0.5 h; Inert atmosphere;

[bis(acetoxy)iodo]benzene in ethyl acetate 0.5 h; cooling;

1: metachloroperbenzoic acid With bis(trichloromethyl) carbonate; triethylamine in dichloromethane T=0°C; 2: 1-hydroxy-pyrrolidine-2,5-dione in dichloromethane T=20°C; 0.5 h;

tert.-butylhydroperoxide; copper (II) acetate monohydrate in water; acetonitrile 0.666667 h; Inert atmosphereReflux;