in hexane; pentane byproducts: (CH3)3SnCl, (CH3)2SnCl2; inert atmosphere, addn. of hexane soln. of BCl3 (large excess) to pentane soln. of stannyl compound at -40°C with stirring; separation of precipitate (-40°C), removement of volatiles, distillation (vacuum);

in dichloromethane dropwise addn. of the Sn compd. in CH2Cl2 to BCl3 in CH2Cl2 (under N2 or Ar) at -78°C, react. for 2 h at this temp., warming to room temp.; evapn. and fractional distn. (vac.);

in dichloromethane byproducts: (CH3)3SnCl, (CH3)2SnCl2; inert atmosphere;

in hexane; pentane inert atmosphere, addn. of hexane soln. of BCl3 to pentane soln. of stannyl compound at -40°C with stirring; separation of precipitate (-40°C), removement of solvent (vacuum), not separated, spectroscopic yield: chlorodimethylstannylbenzene/dichloroborylbenzene/diboraanthracene 65 mol-65/percent45percent mol-percent/10percent mol-percent;

in pentane inert atmosphere, addn. of soln. of stannyl compound to refluxing soln. of PhBCl2, reflux (1 h), cooling (-78°C); filtration of (CH3)3SnCl, removement of volatiles (vacuum), distillation(60°C, 0.1 Torr);

in hexane; pentane inert atmosphere, addn. of hexane soln. of BCl3 to pentane soln. of stannyl compound at -40°C with stirring; separation of precipitate (-40°C), removement of solvent (vacuum), not separated, spectroscopic yield: chlorodimethylstannylbenzene/dichloroborylbenzene/diboraanthracene 65 mol-65/percent45percent mol-percent/10percent mol-percent;

in pentane byproducts: (CH3)3SnBr; inert atmosphere, addn. of soln. of stannyl compound to refluxing soln. of Et2BBr, reflux ( 1 h); removement of volatiles (vacuum), addn. (pentane), pptn. (-78°C),filtration of (CH3)3SnBr (-78°C), removement of solvent (vacuum) , distillation;

in 1,2-dichloro-benzene T=180°C; 4 h; regioselective reaction;

in hexane; pentane inert atmosphere, addn. of hexane soln. of BCl3 to pentane soln. of stannyl compound at -40°C with stirring; separation of precipitate (-40°C), removement of solvent (vacuum), not separated, spectroscopic yield: chlorodimethylstannylbenzene/dichloroborylbenzene/diboraanthracene 65 mol-65/percent45percent mol-percent/10percent mol-percent;

in dichloromethane byproducts: (CH3)3SnCl, (CH3)2SnCl2; inert atmosphere;