1: With lithium aluminium tetrahydride in tetrahydrofuran 0.5 h; Heating / reflux; 2: With hydrogenchloride in tetrahydrofuran; water; ethyl acetate

1: With oxalyl dichloride; dimethyl sulfoxide in dichloro difluoro methane T=-78°C; 0.5 h; 2: With triethylamine in dichloromethane T=-78 - 20°C;