1: diphenyl diselenide With anhydrous iron chloride in dichloromethane T=25°C; 0.333333 h; 2: (1Z)-1,3-diphenyl-2-propyn-1-one O-(phenylmethyl)oxime in dichloromethane T=25°C; 0.0833333 h;

silver tetrafluoroborate; phenol in tetrahydrofuran 6 h; Reflux;