LiNHCMe3 in toluene anhydrous and oxygen-free condns., addn. of Li-compd. in toluene to a stirred soln. of B-compd. in toluene at -78°C within 10 min, allowed to attain ambient temp., reaction time: 3 h; centrifuged, evapn. of solvent in vac., crystn. (pentane/toluene, -78°C); elem. anal.;

LiNC5H10 in cyclohexane anhydrous and oxygen-free condns., addn. of Li-compd. in cyclohexane to a stirred soln. of B-compd. in cyclohexane within 20 min, stirred for 6 h; centrifuged, evapn. of solvent in vac., dissolved in hexane, cooled to -78°C; elem. anal.;

Li-t-Bu in hexane anhydrous and oxygen-free condns., addn. of t-BuLi in hexane to a stirred soln. of B-compd. in hexane at -78°C, stirred at ambient temp. for 7 d; filtered, reduced in volume, cooled to -78°C; elem. anal.;

BuLi in hexane anhydrous and oxygen-free condns., addn. of BuLi in hexane to a stirred soln. of B-compd. in hexane, warmed to ambient temp., stirred overnight; filtered, removal of solvent in vac., kept in vac. for 3 h; elem. anal.;

LiPPh2 in hexane anhydrous and oxygen-free condns., addn. of Li-compd. in hexane to a soln. of B-compd. in hexane at -78°C, stirred for 2 d at ambient temp.; filtered, evapn. of solvent in vac., dissolved in pentane, cooled to -78°C for 14 d; elem. anal.;