Hydrochloric Acid → 4-(2,6-Diethyl-4-methylphenyl)-5-hydroxy-2,6-dimethyl-3(2H)-pyridazinone

Participants

Reaction Conditions

Reaction Steps

To a test tube (outside diameter: 21 mm φ×overall length: 160 mm), 4-(2,6-diethyl-4-methylphenyl)-2,6-dimethyl-5-methylsulfonyl-2,3-dihydropyridazine-3-one ((2-34)-(1)-39) (62.8 mg), dimethylsulfoxide (0.5 ml), and 3.8% by weight of aqueous sodium hydroxide solution (0.5 ml) were added under a nitrogen atmosphere at room temperature, and stirred at 70° C. for 4 hours. Then, to the reaction mixture was added 3.5% by weight of hydrochloric acid (4 ml) at room temperature, and extracted with tert-butyl methyl ether. The organic layer was concentrated under reduced pressure to give 37.5 mg of 4-(2,6-diethyl-4-methylphenyl)-5-hydroxy-2,6-dimethyl-2,3-dihydro-3-pyridazinone ((1-4)-(1)-39).

Provenance & Evidence