methyl-magnesium iodide in diethyl ether (C6H5)3SiCl and an excess of CH3MgI in ether; evapn. of the ether; heating of the residue at 130°C for a few hours;;
Zhun', V. I.; Zhun', A. B.; Vlasenko, S. D.; Belorusskaya, L. A.; Chernyshev, E. A.; Sheludyakov, V. D.
J. Gen. Chem. USSR (Engl. Transl.), 1982 , vol. 52, # 11 p. 2565 - 2570,2266 - 2270
