in diethyl ether under N2, equimolar amt. of MeLi was added dropwise to stirred soln. of(Me3Si)2NB(NMe2)Cl in Et2O at 0°C, warmed to room temp., stirredovernight; filtered, freed of solvent, hexane added, filtered, solvent removed, distd.; elem. anal.;

T=600°C;

1: (i) nBuLi, (ii) /BRN= 1733155/ 2: 600 °C View Scheme