Hydrochloric Acid → 4,5-dihydro-6-[4-(2-hydroxypropyl)-phenyl]-3(2H)-pyridazinone
Reaction equation
C([O:4][CH:5]([CH3:20])[CH2:6][C:7]1[CH:12]=[CH:11][C:10]([C:13]2[CH2:14][CH2:15][C:16](=[O:19])[NH:17][N:18]=2)=[CH:9][CH:8]=1)(=O)C.Cl>[OH-].[Na+]>[OH:4][CH:5]([CH3:20])[CH2:6][C:7]1[CH:12]=[CH:11][C:10]([C:13]2[CH2:14][CH2:15][C:16](=[O:19])[NH:17][N:18]=2)=[CH:9][CH:8]=1Participants
4
Procedure
4,5-Dihydro-6-[4-(2-acetoxypropyl)phenyl]-3(2H)pyridazinone (0.73 g) was heated under reflux in 2N sodium hydroxide solution for 2 hr, cooled, neutralised with 2N hydrochloric acid, and extracted into ethyl acetate. The organic extract was dried (MgSO4) and evaporated to an oil which was chromatographed on silica gel. Elution with methanol-chloroform (4:96) gave 4,5-dihydro-6-[4-(2-hydroxypropyl)phenyl]-3(2H)pyridazinone as a white solid.