in diphenylether 0.333333 h; Heating;

1.1: Et3N / dimethylformamide / 0.5 h / 20 °C 1.2: dimethylformamide / 40 - 45 °C 2.1: dimethylformamide / 20 °C 3.1: 60 percent / 250 - 260 °C View Scheme

1: 63 percent / ethanol / 1 h / Heating 2: 68 percent / diphenyl ether / 0.33 h / Heating View Scheme