methyl lithium in tetrahydrofuran; benzene addn. of soln. of CH3Li in Et2O to soln. of ligand in THF; distn. of ether; refluxing for 2 h; cooling to 0°C; dropwise addn. of C6H6 soln. of borane during 0.5 h; refluxing for 3 h;; evapn. of solvent; extraction with pentane; filtration; evapn.; addn. of CH3OH; storage at 5°C overnight; recrystn. from CH2Cl2/CH3OH; elem. anal.;;

in diethyl ether addn. of soln. of LiPh to soln. of borane (molar ratio 1:1), stirrig (20°C, 2 h, (1)H-NMR monitoring), addn. of excess of LiPh; removal of solvent (after 3 days), extn. (pentane), recrystn. CH2Cl2/MeOH 1:9);

1: tetrachloromethane 2: diethyl ether View Scheme

1: tetrahydrofuran 2: tetrachloromethane 3: diethyl ether View Scheme