in tetrahydrofuran; hexane byproducts: Me2PCH2MgMe, LiCH2PMe2; under anaerobic conditions; n-BuLi (0.1-0.2 equiv.) in n-hexane added at-78°C to Sn compd. (1 equiv.) in n-hexane, stirred at room temp. for 15 min; MgMe2 (1 equiv.) in THF added at -78°C; stirred for 30 min; warmed to room temp.; 4 d; not isolated; identified by (119)Sn NMR spectra; >95percent conversion;

in tetrahydrofuran; hexane byproducts: Me2PCH2MgMe, LiCH2PMe2; under anaerobic conditions; n-BuLi (0.1-0.2 equiv.) in n-hexane added at-78°C to Sn compd. (1 equiv.) in n-hexane, stirred at room temp. for 15 min; MgMe2 (1 equiv.) in THF added at -78°C; stirred for 30 min; warmed to room temp.; 4 d; not isolated; identified by (119)Sn NMR spectra; >95percent conversion;