Cyclopropyl methyl ketone → 1-Cyclopropyl-3-(3-pyridazinyl)-1,3-propanedione

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Reaction Steps

A stirred mixture of 4.0 g. of ethyl-3-pyridazinecarboxylate, 4.4 g. of cyclopropylmethyl ketone and 1.6 g. of sodium methoxide in 100 ml. of benzene is heated under reflux for 5 hours. The mixture is diluted with 300 ml. of water and the benzene phase is separated. The aqueous mixture is made weakly acidic with dilute hydrochloric acid and extracted with chloroform. The chloroform solution is dried over magnesium sulfate and concentrated under reduced pressure to yield straw-colored crystals which are recrystallized from acetonitrile to give cream-colored crystals, melting point 85°-87°C.

Provenance & Evidence