hydrogenchloride in methanol

in diethyl ether To (C5Cl4Br)Mn(CO)3 in Et2O is added first BuLi at -60°C and then is added MesSO2ON(SiMe3)2 under N2, reaction mixture is warmed up to room temp.; evapn. of Et2O under vac., residue is stirred with hexane, hexane soluble part is washed (H2O), dried over MgSO4, and filtered, addn. of Et2O, H2O and HCl, sepn. of the orange ether phase and drying, filtn., after addn. of hexane ppt. is obtained;

1: aq. HCl / methanol 2: AcOH View Scheme