反应条件
in dichloromethane N2 atmosphere, addn. of soln. of Me2BBr to soln. of Sn compd. (-78 to -60°C, 2 h), warming to room temp., stirring (room temp., 1 h), addn. of Me2SnCl2 soln. (room temp., 45 min), redn. of volume, addn. to soln. of tBuBBr2 (-78°C, 90 min); warming to room temp., stirring (room temp., 4 d), removement of volatiles (25°C, 12 Torr/1E-3 Torr), pptn. (Me2SnBr2, petroleum ether, -30°C), filtration, removement of volatiles (0°C, 12 Torr/1E-3 Torr), distn.; elem. anal;
