反应详情

(Step 1-ii) 6-chloro-N-(3-chlorophenyl)pyridazin-3-amine (88.1 g, 367 mmol) was suspended in 1:6 triethylene glycol/hydrazine hydrate and heated to reflux for 4 hours. The reaction mixture was cooled to room temperature, diluted with water and a solid filtered off. This solid was triturated with Et2O to give the product, N-(3-chlorophenyl)-6-hydrazinylpyridazin-3-amine, as a brown solid (60 g, 254 mmol, 69% yield): 1H NMR (500 MHz, DMSO-d6) 9.23 (s, 1H), 8.09 (t, J=1.8 Hz, 1H), 7.46 (d, J=8.2 Hz, 1H), 7.24 (t, J=8.1 Hz, 1H), 7.08 (d, J=9.4 Hz, 1H), 7.00 (d, J=9.4 Hz, 1H), 6.85 (dd, J=1.3, 7.8 Hz, 1H).

1. temperatureheated
2. temperatureto reflux for 4 hours
3. filtrationa solid filtered off
4. customThis solid was triturated with Et2O