1: 1.) Orange CRET.+, 2.) Zn / 1.) CH2Cl2, 0 deg C, 0.5 h, 2.) r.t., 5 min 2: ICl / CH2Cl2 View Scheme

Orange CRET.+; zinc 1.) CH2Cl2, 0 deg C, 0.5 h, 2.) r.t., 5 min; Yield given. Multistep reaction. Yields of byproduct given;