oxygen; sodium hydride in N,N-dimethyl-formamide 72 h;

1: With sodium hydride in N,N-dimethyl-formamide 2: With oxygen; sodium hydride in N,N-dimethyl-formamide

1: 12 h / 0 °C 2: 43 percent / NaH / dimethylformamide / 24 h / Ambient temperature 3: 70 percent / NaH, O2 / dimethylformamide / 72 h View Scheme

1: 43 percent / NaH / dimethylformamide / 24 h / Ambient temperature 2: 70 percent / NaH, O2 / dimethylformamide / 72 h View Scheme

1.1: trichlorophosphate / N,N-dimethyl-aniline / Inert atmosphere 2.1: methanol / Inert atmosphere 3.1: sodium hydride / N,N-dimethyl-formamide / 20 °C / Inert atmosphere 3.2: air / Inert atmosphere View Scheme