1: 1.) LDA, 2.) 1,2-dibromotetrafluoroethane / 1.) THF, -78 deg C, 1 h, 2.) THF, from -78 deg C to RT 2: 45 percent / 4.5 M aq. HCl / 6 h / Heating 3: (COCl)2, DMF / CH2Cl2 / 18 h / Ambient temperature 4: 1.) isopropylmagnesium chloride / 1.) THF, -78 deg C, 30 min, 2.) THF, from -78 deg C to RT View Scheme

1: (COCl)2, DMF / CH2Cl2 / 18 h / Ambient temperature 2: 1.) isopropylmagnesium chloride / 1.) THF, -78 deg C, 30 min, 2.) THF, from -78 deg C to RT View Scheme

1: 45 percent / 4.5 M aq. HCl / 6 h / Heating 2: (COCl)2, DMF / CH2Cl2 / 18 h / Ambient temperature 3: 1.) isopropylmagnesium chloride / 1.) THF, -78 deg C, 30 min, 2.) THF, from -78 deg C to RT View Scheme

isopropylmagnesium chloride 1.) THF, -78 deg C, 30 min, 2.) THF, from -78 deg C to RT; Yield given. Multistep reaction;