With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.932-22-9,4,5-Dichloro-3(2H)-pyridazinone,as a common compound, the synthetic route is as follows.
To a suspension of 4,5-dichloro-2-hydroxypyradizine (5.00 g, 30.3 mmol) in methanol (90 mL) at room temperature, sodium methoxide (30% in methanol, 32.8 mL, 182 mmol) was added. The mixture was heated to reflux for 2 days then was concentrated to dryness. The residue was dissolved in water and acidified with glacial acetic acid. The white precipitate that formed was collected by filtration, washing with water. The solid was dried under vacuum to give 4-chloro-5-methoxypyridazin-3(2H)-one (29-1, 2.99 g).
The synthetic route of 932-22-9 has been constantly updated, and we look forward to future research findings.
Reference£º
Patent; Aviara Pharmaceuticals, Inc.; Biediger, Ronald J.; Benish, Michele A.; Hardy, Lindsay Bonner; Boyd, Vincent A.; Market, Robert V.; Thrash, Thomas P.; Young, Brandon M.; (83 pag.)US2018/312523; (2018); A1;,
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