T=145°C;

PPA T=140 - 150°C; 0.666667 h;

phosphorus pentachloride

1: 87 percent / PPA / 0.67 h / 140 - 150 °C 2: 87.7 percent / 30percent H2O2, conc.HCl / acetic acid / 0.5 h / 85 °C 3: 80.5 percent / methanol / 0.17 h / Heating 4: 56.8 percent / Zn, 1) AcOH, 2) HCl / methanol / Heating; 1) 10 min, 2) 5 min 5: KOH / dimethylformamide / 20 h / 60 - 65 °C View Scheme