ethanol; bromine in dichloromethane Irradiation (UV/VIS); under Ar, to soln. of educt in CH2Cl2 added soln. of Br2 in CH2Cl2 in portions during 1 h at -10°C under pressure of 170-200 mmHg with irrdn. with 200 W bulb, stirred for 30 min at -10°C, heated under vac. to 17°C; concd. in vac., cooled to -70°C, ethanol added, evapd. in vac. without heating; GLC anal. of products after oxidative hydrolysis;

ethanol; water; bromine in dichloromethane; water byproducts: isopropylbromide; under Ar, to soln. of educt in CH2Cl2/H2O added with stirring over 1.5-3 h soln. of Br2 in CH2Cl2 at 0-2°C, stirred for 30 min, heated to room temp.; aq. layer removed, org. one washed with water, evapd., dissolved in ethanol; GLC anal. of products after oxidn. with H2O2/NaOH;

ethanol; bromine in dichloromethane Irradiation (UV/VIS); under Ar, to soln. of educt in CH2Cl2 added soln. of Br2 in CH2Cl2 in portions during 1 h at -10°C under pressure of 170-200 mmHg with irrdn. with 200 W bulb, stirred for 30 min at -10°C, heated under vac. to 17°C; concd. in vac., cooled to -70°C, ethanol added, evapd. in vac. without heating; GLC anal. of products after oxidative hydrolysis;