1: 84.9 percent / acetyl chloride / dimethylformamide / 25 h / 50 - 54 °C 2: 63.1 percent / hydrazin hydrate / ethanol / 1) room temp. 2.5 h.,2) 63 deg C, 3 h. View Scheme

1: 90 percent / xylene / 1.58 h / 120 - 123 °C 2: 69.8 percent / hydrazin hydrate / ethanol / 1) room temp., 2,5 h; 2) 63 deg C, 3 h. View Scheme