ammonia in diethyl ether; ammonia mixing of dry ether with liquid NH3 at -50°C, addn. of the borazine in ether, slow warming to room temp. with stirring, refluxing for 30 min;; evapn.of solvent, sublimation of the residue under vacuum;;

ammonia in acetone

in diethyl ether soln. of (H2N)Me2B3N3Me was cooled to -78°C, soln. of MeLi was added, mixt. was warmed, stirred overnight, cooled, soln. of (ClBNMe)3 was added, stirred and warmed to room temp., stirred overnight; filtd., evapd., residue dissolved in a min. of Cl2CH2, concd., elem. anal.;