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.;

methanol 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.;