magnesium; ethylene dibromide in diethyl ether (N2); added dropwise a mixture of 1,2-dibromoethane and CH2CHCH2Br to a ice-cooled suspn. of Mg over 6 h; added dropwise to a suspn. of Ge-compound at 0°C under stirring over 1 h; hydrolyzed; filtered; evapd.; distd.;

in tetrahydrofuran (N2); added dropwise a soln. of CH2CHCH2MgBr to a suspn. of Ge-compound; stirred for 1 h at room temp.; hydrolyzed; extracted with ether; washed with water; dried over MgSO4; evapd.;

germanium tetrachloride

water; scandium tris(trifluoromethanesulfonate) in nitromethane T=20°C; Addition; 5 h;

scandium tris(trifluoromethanesulfonate) in nitromethane; water 2 h; Ambient temperature; Yield given;

water; scandium tris(trifluoromethanesulfonate) in nitromethane T=20°C; Addition; 1.5 h;

scandium tris(trifluoromethanesulfonate) in nitromethane; water 0.75 h; Ambient temperatureeffect of the amount of Sc(OTf)3 and water and the reaction time; Product distribution;