1: methanephosphonic acid dimethyl ester With n-butyllithium in tetrahydrofuran; hexane
T=0°C; Metallation; 0.333333 h;
2: N-methoxy-N-methyl-2-phenylacetamide in tetrahydrofuran; hexane
T=-78°C; Substitution; 0.5 h;
3: With hydrogenchloride in water
Hydrolysis;