1: methyl phosphonic acid,diethyl ester With n-butyllithium in tetrahydrofuran; hexane T=-78°C; 0.333333 h; 2: With copper(I) bromide in tetrahydrofuran; hexane T=-60 - -30°C; 1.5 h; 3: chloroacetyl chloride in tetrahydrofuran; hexane T=-40 - -30°C; Further stages.;

hydrogenchloride; copper(l) chloride in diethyl ether 24 h;

hydrogenchloride; acetone 3 h; Ambient temperature;

Heating;

1: 75 percent / diethyl ether / 3 h / Ambient temperature 2: 67 percent / HCl, CuCl / diethyl ether / 24 h View Scheme

1: trifluoroperoxyacetic acid / CHCl3 / 40 - 45 °C 2: 90 percent / Heating View Scheme

sodium tetrahydroborate in ethanol