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: 35 percent / ethanol; triethylamine / 87 h / Irradiation 6: 48 percent / 4.5 h / Heating 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: 35 percent / ethanol; triethylamine / 87 h / Irradiation 6: 4.5 h / Heating 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