反应详情

(Step 3-i) N-(3-chlorophenyl)-6-hydrazinylpyridazin-3-amine (4.0 g, 17 mmol)) was taken up in HCl/Et2O (20 mL) and stirred for 10 min. The reaction mixture was concentrated, taken up in DMF (20 mL), and 2-chloro-1,1,1-trimethoxyethane (5.2 g, 34 mmol) was added. After stirring for 3 hours, a precipitate began to form. After one hour additional stirring, the reaction mixture was filtered to give the product, 3-(chloromethyl)-N-(3-chlorophenyl)-[1,2,4]triazolo[4,3-b]pyridazin-6-amine, as a white solid. (4 g, 13.6 mmol, 80% yield): 1H-NMR (500 MHz, DMSO-d6) 10.40 (s, 1H), 8.19 (d, J=9.8 Hz, 1H), 8.13 (t, J=1.8 Hz, 1H), 7.68 (dd, J=1.7, 8.2 Hz, 1H), 7.40 (t, J=8.1 Hz, 1H), 7.28 (d, J=9.9 Hz, 1H), 7.11-7.09 (m, 1H).

1. concentrationThe reaction mixture was concentrated
2. stirringAfter stirring for 3 hours
3. customto form
4. waitAfter one hour additional stirring
5. filtrationthe reaction mixture was filtered