N,N,N',N',N'',N''-hexamethylphosphoric triamide; trichlorophosphate T=165°C; 3 h;

1: 64 percent / Isopentyl nitrite; Copper(I) chloride; conc. HCl / various solvent(s) / 55 - 65 °C 2: 97 percent / 78percent H2SO4 / acetic acid / Heating 3: 67 percent / POCl3, Hexamethyl phosphoric acid triamide / 3 h / 165 °C View Scheme

1: 97 percent / 78percent H2SO4 / acetic acid / Heating 2: 67 percent / POCl3, Hexamethyl phosphoric acid triamide / 3 h / 165 °C View Scheme

1: 64 percent / Isopentyl nitrite; Copper(I) chloride; conc. HCl / various solvent(s) / 55 - 65 °C 2: 97 percent / 78percent H2SO4 / acetic acid / Heating 3: 67 percent / POCl3, Hexamethyl phosphoric acid triamide / 3 h / 165 °C View Scheme