in diethyl ether; toluene T=-70°C; 1 h; Product distribution / selectivity;

in toluene T=-60 - 20°C; 2.5 h; Product distribution / selectivity;

in diethyl ether absence of air and moisture; portionwise addn. of ZrCl4 to excess of PhCH2MgCl at -78°C (protecting from light), slow warming to 23°C, stirring for 3 h; solvent removal, addn. of hexanes, filtration, concn., crystn. (-78°C); can be purified by dissoln. in PhMe, filtration, solvent removal,addn. of hexanes, concn., crystn. (-78°C), collection (filtratio n); elem. anal.;

in diethyl ether byproducts: MgCl2, pyridine, C6H5CH3; (Ar); Zr-compound added to a soln. of organic compound under stirring at -40°C; stirred for 3 h at -30°C; filtered; dried in vacuo; extracted with hot pentane; cooled;

hydrogenchloride in diethyl ether CO2 was bubbled through a cold (-78°C) soln. of compound in ether in the absence of light for 3-4 h, aq. HCl was added;;

acetylacetonate in toluene byproducts: MePh; Ar atmosphere; 0. degree.C, 2 h (excess of C5H8O2);

hydrogenchloride in diethyl ether CO2 was bubbled through a cold (-78°C) soln. of compound in ether in the absence of light for 3-4 h, aq. HCl was added;;