1,3-Dimethyl-2-imidazolidinone → HCID 178424441, compound

Participants

Reaction Steps

To a mixture of 27.4 g (purity: 92.9%; 149 mmol) of sodium 2-cyclopropyl-6-methylphenoxide and 12.5 g of 1,3-dimethyl-2-imidazolidinone was added 2.5 g (purity: 98.5%; 14.9 mmol) of 4-hydroxy-3,6-dichloropyridazine at room temperature. Then, the resultant mixture was heated from room temperature to 140° C. to effect a reaction for 7 hours. After completion of the reaction, the reaction mixture was cooled to room temperature, and 120 g of pure water and 100 g of toluene were added to the cooled mixture, and stirred for 30 minutes, and an organic phase containing 2-cyclopropyl-6-methylphenol added in an excess amount was separated. Then, the resultant aqueous phase containing a sodium salt of 6-chloro-3-(2-cyclopropyl-6-methylphenoxy)-4-pyridazinol was quantitatively determined by an HPLC internal standard analysis method, which showed that 3.58 g of 6-chloro-3-(2-cyclopropyl-6-methylphenoxy)-4-pyridazinol (yield: 86.9%) and 17 mg of 3-chloro-6-(2-cyclopropyl-6-methylphenoxy)-4-pyridazinol (yield: 0.4%) were obtained.

Provenance & Evidence