1: methanephosphonic acid dimethyl ester With n-butyllithium in tetrahydrofuran; hexane T=-78°C; 1 h; Inert atmosphere; 2: 2-(p-methoxyphenyl)acetic acid ethyl ester in tetrahydrofuran; hexane T=-78 - 20°C; 1.5 h; Inert atmosphere;