sodium methylate in methanol T=0 - 60°C; 96 h; Inert atmosphere;

sodium methylate in ethanol 17 h; Heating / reflux;

1: trichlorophosphate; N-ethyl-N,N-diisopropylamine / N,N-dimethyl-formamide / 2 h / 0 - 130 °C 2: 1-chloroethyl chlorocarbonate / 1,2-dichloro-ethane / 16.25 h / 0 - 20 °C 3: triethylamine / dichloromethane / 16 h / 0 - 20 °C View Scheme

N-ethyl-N,N-diisopropylamine; trichlorophosphate in N,N-dimethyl-formamide T=0 - 130°C; 2 h;