1: diethyl 4-[N-(4-methoxyphenyl)-N-phenylamino]benzylphosphonate With potassium tert-butylate in tetrahydrofuran Horner-Wittig condensation; 0.5 h; Cooling with ice; 2: 4-[N-phenyl-N-(4-methoxyphenyl)amino]benzaldehyde in tetrahydrofuran T=0 - 20°C; Horner-Wittig condensation; 24 h;