n-butyl chloride in ethylene glycol dimethyl ether under argon; tin compound in DME cooled to -78 °C; LiBu added; quench with excess alkyl halide;; poured in NH4Cl-soln./petroleum ether; sepn. of org. layer; dried; concd.; chromd.; NMR;;

n-butyllithium in ethylene glycol dimethyl ether T=-30°C;

n-butyl chloride in ethylene glycol dimethyl ether under argon; tin compound in DME cooled to -78 °C; LiBu added; quench with excess alkyl halide;; poured in NH4Cl-soln./petroleum ether; sepn. of org. layer; dried; concd.; chromd.; NMR;;