1: 94 percent / CH2Cl2 / Ambient temperature 2: 95 percent / BF3*Et2O / Ambient temperature 3: H2 / Raney Ni / ethanol / 20 h / Heating 4: 82 percent / P2S5 / benzene / 1 h / Heating 5: 83 percent / CH2Cl2 / Ambient temperature 6: 31 percent / diethyl ether / 48 h / Heating View Scheme

1: 95 percent / BF3*Et2O / Ambient temperature 2: H2 / Raney Ni / ethanol / 20 h / Heating 3: 82 percent / P2S5 / benzene / 1 h / Heating 4: 83 percent / CH2Cl2 / Ambient temperature 5: 31 percent / diethyl ether / 48 h / Heating View Scheme

1: H2 / Raney Ni / ethanol / 20 h / Heating 2: 82 percent / P2S5 / benzene / 1 h / Heating 3: 83 percent / CH2Cl2 / Ambient temperature 4: 31 percent / diethyl ether / 48 h / Heating View Scheme

1: 82 percent / P2S5 / benzene / 1 h / Heating 2: 83 percent / CH2Cl2 / Ambient temperature 3: 31 percent / diethyl ether / 48 h / Heating View Scheme

in diethyl ether 48 h; Heating;

sodium hydroxide; sodium hypochlorite Multistep reaction. Title compound not separated from byproducts;

1: 83 percent / CH2Cl2 / Ambient temperature 2: 31 percent / diethyl ether / 48 h / Heating View Scheme