1: (p-methoxybenzyl)phosphonic acid ethyl ester With 18-crown-6 ether; sodium methylate in N,N-dimethyl-formamide T=20°C; 0.0833333 h; 2: 4-dimethylamino-benzaldehyde in N,N-dimethyl-formamide T=20 - 120°C; Horner-Emmons-Wadsworth reaction; 6 h;

1.1: 140 °C 2.1: sodium methoxide; 18/6 crown ether / dimethylformamide / 0.08 h / 20 °C 2.2: dimethylformamide / 6 h / 20 - 120 °C View Scheme

potassium tert-butylate

Pt vs. Ag; tetra-(n-butyl)ammonium iodide; mercury; silver(I) in N,N-dimethyl-formamide T=20°C; electrolysis (- 1,95 V); Yield given. Yields of byproduct given;