methanol in pentane under N2; soln. of B complex in pentane cooled to 0 °C, slowly added alcohol, stirred for 15 min; upper layer sepd., lower layer extd. with cold (0 °C) pentane, combined ext. evapd. in vac., distd.;

water in diethyl ether; dichloromethane under N2; to excess of H2O in Et2O added cooled (0 °C) soln. of B complex in CH2Cl2 with stirring, stirred for 10 min; water layer sepd., org. layer washed with cold H2O and brine, dried with MgSO4, evapd. in vac., recrystd. from C6H6;

in dichloromethane; pentane under N2; to soln. of B complex in CH2Cl2 added pentane, cooled to -10 °C, slowly added alcohol, stirred for 15 min; upper layer sepd., lower layer extd. with cold (0 °C) pentane, combined ext. evapd. in vac., distd.;

in tetrahydrofuran

methanol in dichloromethane; pentane under N2; soln. of B complex in CH2Cl2 cooled to 0 °C, slowly added to cold (-10 °C) mixt. of glycol and pentane, stirred for 0.5h at -10 °C, added MeOH, stirred for 10 min; upper layer sepd., lower layer extd. with cold (0 °C) pentane, combined ext. evapd. in vac., distd.;

ethanol in dichloromethane; pentane under N2; to soln. of B complex in CH2Cl2 added pentane cooled to -10 °C, slowly added alcohol, stirred for 15 min; upper layer sepd., lower layer extd. with cold (0 °C) pentane, combined ext. evapd. in vac., distd.;

n-butyllithium in hexane; pentane byproducts: butane; to soln. of t-BuOH in pentane dropwise added soln. of BuLi in hexane, then slowly added cold (0 °C) soln. of B complex in pentane, stirred for 0.5 h at room temp.; LiBr removed by centrifuging, solid extd. with pentane, combined ext. distd.;