methyllithium in not given byproducts: CH3OCH2OC6H10Li; Sn-compd. was reacted with MeLi in THF or DME at -60°C for 10 min; equil. react.; analysed by (1)H and (13)C NMR spectra;

N,N-dimethyl-aniline in tetrahydrofuran Ar; Me3SnLi prepared at 0°C in THF; cooled (-78 °C); substrate added (1 min) in THF; stirred (15 min); quenched (NH4Cl-soln.); pouring in NH4Cl-soln.; extn. (petroleum ether); org. layer dried; filtered; concd.; CH2Cl2 added;; addn. of ClCH2OCH3 and aniline (18 h, room temp.); poured into petroleum ether; washed (0,5N HCl, water, Na2CO3-soln.); drying of org. layer; filtered; concd.; chromd. (silica gel; ethyl acetate/petroleum ether 0.5:99.5);;

in tetrahydrofuran under argon; tin-compound in THF was cooled to -78 °C; nBuLi was added over 1 min; stirring 15 min; quenching with NH4Cl-soln. (gas evolution);; poured into water; extn. (petroleum ether); org. layer dried (Na2SO4), filtered, concd. (vacuo); chromy. (silica gel; petroleum ether);;