byproducts: isobutan, boron hydride; High Pressure; under N2; diborane and trihalogen-borane was added to t-butylbenzene at-130°C, then in a closed autoclave the mixture was heated to 130°C for 40 min; at -195.8°C H2 was removed, at room temp. the residue of trihalogen-borane and diborane were removed, unseparable isomers; elem. anal.;

in dichloromethane N2 atmosphere, addn. of soln. of stannyl compound to suspension of Me2SnBr2 at room temp., addn. of soln. of tBuBBr2 at -68 to -40°C (130min), warming to room temp.; removement of solvent (25°C, 12 Torr), condensation of Me3SnBr and Me2SnBr2 into a trap (-78°C, 4 h), fractional distillation (69-77°C, 1E-5 Torr); elem. anal.;

in dichloromethane N2 atmosphere, addn. of soln. of stannyl compound to soln. of borane at -78°C (3 h) with stirring, slow warming to room temp., stirring (room temp., 17 h); removement of solvent (25°C, 13 Torr) and Me3SnBr (30°C, 1E-2 Torr or 53-55°C, 12 Torr), distillation (63-66°C, 1E-5Torr), cryst.; elem. anal.;

in dichloromethane N2 atmosphere, addn. of soln. of stannyl compound to suspension of Me2SnCl2 at room temp., addn. of soln. of tBuBBr2 at -50°C (1.5 h), warming to room temp. (1.5 h), stirring (25°C, 96 h), reflux (48 h); removement of solvent (25°C, 12 Torr), condensation of Me3SnBr and Me2SnClBr in a trap (-78°C), distillation (48-51°C, 1E-5Torr), spectroscopic yields: (PhNBtBu)3 20percent; PhN(BtBuCl)2 80percent; elem. an al.;

in dichloromethane N2 atmosphere, addn. of soln. of stannyl compound to soln. of borane at -65 to -75°C (90 min), slow warming to room temp., stirring (25°C., 12 h); removement of solvent (25°C, 12 Torr) and Me3SnBr (30°C, 1E-2 Torr or 53-55°C, 12 Torr), MeN(BBr(C4H9))2,MeN(SnMe2Br)(BMeBr)/C4H9B(MeB)r ratio 8:2;

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;

in dichloromethane N2 atmosphere, addn. of soln. of stannyl compound to soln. of borane at -75 to -65°C (>/= 60 min) with stirring, slow warming to room temp., stirring (room temp., 12 h); NMR-monitoring, not isolated;

in dichloromethane N2 atmosphere, addn. of soln. of borane to soln. of stannyl compound at -78°C (15 min), slow warming to room temp., stirring (room temp.,3 d); (5)B-NMR-monitoring, PhN(SnMe3)(BtBuBr)/tBu(Me)BBr ratio 2:3, not isolated;

in dichloromethane N2 atmosphere, addn. of soln. of stannyl compound to suspension of Me2SnCl2 at room temp., addn. of soln. of tBuBBr2 at -50°C (1.5 h), warming to room temp. (1.5 h), stirring (25°C, 96 h), reflux (34 h); NMR-monitoring, not isolated, spectroscopic yields: PhN(BtBuCl)(Sn(Me2Cl) 35percent; tBuBClBr 29percent; PhN(BtBuCl)2 35percent;

in dichloromethane N2 atmosphere, addn. of soln. of stannyl compound to suspension of Me2SnCl2 at room temp., addn. of soln. of tBuBBr2 at -50°C (1.5 h), warming to room temp. (1.5 h), stirring (room temp., 3 h); other reaction time; NMR-monitoring, not isolated, spectroscopic yields: PhN(BtBuCl)(Sn(Me2Cl) 50percent; tBuBClBr 50percent;