1: 84.6 percent / phosphorus oxychloride / 3 h / Heating 2: 2-methoxy-ethanol / 87 h / Irradiation View Scheme

1: 62.3 percent / dimethylformamide / 360 h / Ambient temperature 2: 1) raney nickel/H2, acetic acid, 2) NaNO2/H2O, 1.5h 3: 84.6 percent / phosphorus oxychloride / 3 h / Heating 4: 2-methoxy-ethanol / 87 h / Irradiation View Scheme

1: 62.3 percent / dimethylformamide / 360 h / Ambient temperature 2: 1) raney nickel/H2, acetic acid, 2) NaNO2/H2O, 1.5h 3: 84.6 percent / phosphorus oxychloride / 3 h / Heating 4: 2-methoxy-ethanol / 87 h / Irradiation View Scheme

1: 85 percent / ethanol; HCl; H2O 2: 62.3 percent / dimethylformamide / 360 h / Ambient temperature 3: 1) raney nickel/H2, acetic acid, 2) NaNO2/H2O, 1.5h 4: 84.6 percent / phosphorus oxychloride / 3 h / Heating 5: 2-methoxy-ethanol / 87 h / Irradiation View Scheme

1: 1) raney nickel/H2, acetic acid, 2) NaNO2/H2O, 1.5h 2: 84.6 percent / phosphorus oxychloride / 3 h / Heating 3: 2-methoxy-ethanol / 87 h / Irradiation View Scheme

in 2-methoxy-ethanol 87 h; Irradiation;

in ethanol; triethylamine 87 h; Irradiation;