tetraethylammonium bromide in N,N-dimethyl-formamide T=-30 - -20°C; electrolysis at -1.8 to -2.0 V;

sodium methylate 1.) diglyme, 1-2 h, room temperature, 2.) 185-190 deg C, 1 Torr, 3 h; Yield given. Multistep reaction. Yields of byproduct given. Title compound not separated from byproducts;

hydrogen

hydrogen T=24.84°C;