反应条件
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;
