magnesium in tetrahydrofuran; pentane

1: With magnesium in tetrahydrofuran T=20°C; Grignard reaction; 2 h; 2: With N,N-diethylphosphoramidous dichloride in tetrahydrofuran T=0 - 50°C; phosphorylation; 3 h; 3: With hydrogenchloride in pentane T=0°C; Hydrolysis; 1 h;