1: 60 percent / NaHCO3, m-ClC6H4CO3H / CH2Cl2 / 14 h / 0 °C 2: 1) NaH, HMPTA, BuLi / 1) THF, 2) -90 deg C to RT, 15h View Scheme

N,N,N',N',N'',N''-hexamethylphosphoric triamide; n-butyllithium; sodium hydride 1) THF, 2) -90 deg C to RT, 15h; Yield given. Multistep reaction;

sodium hydroxide; sodium hypobromide in ethanol 15 h; Ambient temperature;