in tetrachloromethane N2 atmosphere; addn. of soln. of org. compd. in CCl4 to B-compd. in CCl4, refluxing (24 h); sepn. of solvent, distn. (vac.); elem. anal.;

in tetrachloromethane N2 atmosphere; addn. of soln. of org. compd. in CCl4 to B-compd. in CCl4, refluxing (24 h); sepn. of solvent, distn. (vac.); elem. anal.;

in diethyl ether; hexane addn. of Grignard reagent to soln. of borole in hexane (N2, -80°C), slow warming; decantation, distn., addn. of LiN(SiMe3)2 to soln. of crude distillate (hexane, 0°C), refluxing (2h), decantation, solvent evapn., distn. (high vac.); elem. anal.;

in diethyl ether; hexane addn. of Grignard reagent to soln. of borole in hexane (N2, -80°C), slow warming; decantation, distn., addn. of LiN(SiMe3)2 to soln. of crude distillate (hexane, 0°C), refluxing (2h), decantation, solvent evapn., distn. (high vac.); elem. anal.;

in hexane addn. of a suspension of lithiated 2,6-dimethylaniline prepd. from n-BuLi and 2,6-dimethylaniline to a soln. of S2B(Br)C(Et)C(Et) in hexane at 0°C (N2, exclusion of moisture), warming to room temp. and stirring for 24 h; filtering off Li salts, removal of the solvent and sublimation of the product at 0.01 mbar, repeated recrystn. from n-hexane, elem. anal.;