1: 4-bromo-phenol With n-butyllithium in diethyl ether 2: (2-oxo-5,5-diphenyl-oxazolidin-3-yl)-phosphonic acid diethyl ester in diethyl ether; dichloromethane Further stages.;

triethylamine in diethyl ether

sodium hydroxide; chlorine 1.) CCl4, 0 deg C; 2.) H2O, room temp., 2 h; Yield given. Multistep reaction;

sodium in ammonia Irradiation (UV/VIS); (CH3)3SnCl was dissolved in ammonia, Na metal was added until a blue color persisted for 5 min, when the blue color dissapeared, phosphate esterwas added, the mixt. was UV-irradiated with stirring for 1 h; excess of CH3I was added, NH3 was evapd., the residue was treated with water, extd. with ether, washed with aq. satd. soln. of NaCl, dried over MgSO4, recrystd. in ethanol;

sodium in ammonia Irradiation (UV/VIS); (CH3)3SnCl was dissolved in ammonia, Na metal was added until a blue color persisted for 5 min, when the blue color dissapeared, phosphate esterwas added, the mixt. was UV-irradiated with stirring for 1 h; excess of CH3I was added, NH3 was evapd., the residue was treated with water, extd. with ether, washed with aq. satd. soln. of NaCl, dried over MgSO4, recrystd. in ethanol;

sodium in ammonia Irradiation (UV/VIS); (CH3)3SnCl was dissolved in ammonia, Na metal was added until a blue color persisted for 5 min, when the blue color dissapeared, phosphate esterwas added, the mixt. was UV-irradiated with stirring for 1 h; excess of CH3I was added, NH3 was evapd., the residue was treated with water, extd. with ether, washed with aq. satd. soln. of NaCl, dried over MgSO4, recrystd. in ethanol;

sodium in ammonia Irradiation (UV/VIS); (C6H5)3SnCl was dissolved in ammonia, Na metal was added until a blue color persisted for 5 min, when the blue color dissapeared, phosphate ester was added, the mixt. was UV-irradiated with stirring for 1.5 h; excess of CH3I was added, NH3 was evapd., the residue was treated with water, extd. with ether, washed with aq. satd. soln. of NaCl, dried over MgSO4, recrystd. in ethanol;

in ammonia Irradiation (UV/VIS); react. 2 equiv. Ph3SnNa with 1,4-BrC6H4OPO(OEt)2 in liquid ammonia under UV irradiation for 1.5 h;