1: With n-butyllithium in pentane T=20°C; 2 h; 2: With boron trichloride in pentane T=-78°C; 1 h; 3: With trimethyl-silane in pentane T=20°C; 10 h;

n-butyllithium; trimethyl-silane in pentane byproducts: LiCl, Me3SiCl; all manipulations with exclusion of air and moisture, under dry Ar or N2atm.; org. compd. reacted with soln. of n-BuLi at -15°C then at room temp. with stirring for 2 h, then added to soln. of BCl3 at -78.deg ree.C, Me3SiH soln. added dropwise; LiCl filtered, all volatiles evapd. in vac., residue distd.;