n-butyllithium in tetrahydrofuran; hexane T=-78°C;

magnesium in tetrahydrofuran T=50°C; 8 h; ultrasonic bath; Yield given;

in tetrahydrofuran; diethyl ether solution of MeLi (30 mmol) in Et2O was added to tin compound (0.83 mmol) in THF; stirring 0.5 h at room temperature;; excess of MeLi was destroyed by careful addition of MeOH inTHF; solvent was evaporated; extraction (CH2Cl2) yield the product;;

in tetrahydrofuran; diethyl ether exclusion of air and moisture; addn. of LiC(Si(CH3)2C6H5)3 in thf-diethyl ether to CdBr2 in thf during 1 h, stirred for 30 min; removal of solvent, extn. (heptane), extn. (boiling toluene), filtration, concn. and cooling of toluene extracts; elem. anal.;

1: (Me2PhSi)3CH With methyllithium in tetrahydrofuran Peterson olefination; 2 h; Inert atmosphereReflux; 2: formaldehyd in tetrahydrofuran T=20°C; Peterson olefination; 12 h; Inert atmosphere;

1: (Me2PhSi)3CH With methyllithium in tetrahydrofuran Peterson olefination; 2 h; Inert atmosphereReflux; 2: formaldehyd in tetrahydrofuran T=20°C; Peterson olefination; 12 h; Inert atmosphere;

methyllithium 1.) Et2O, THF, 66-67 deg C; 2.) THF, reflux, 6 h; Yield given;