aq. NH4Cl in tetrahydrofuran dropwise addn. of soln. of SbCl3 in THF to cold soln. of stoich. amt. of BrMgCCPh in THF (-15°C, under N2), allowed to warm up, stirred (20°C, 2 h), hydrolysis with 10percent aq. NH4Cl (-10°C), extn. with ether; ext. washed with satd. NaCl-soln., dried with Na2SO4, evapn. of solvent in high vac.;

in tetrahydrofuran; benzene molar artio of SbCl3 and Ag compound = 2:1, 1 h, 50°C; recrystn. from heptane;

in benzene at 50°C, 1h;;