Pyridine → N-(3,4-Dichlorophenyl)-N-methyl-3-oxobutanamide

Participants

Reaction Steps

Dissolved in toluene were 3.5 g (0.02 mole) of 3,4-dichloro-N-methylaniline and a catalytic amount of pyridine, followed by a dropwise addition of 1.9 g (0.022 mole) of diketene at 50° C. After completion of the the dropwise addition, the resultant mixture was heated under reflux for 3 hours. The reaction mixture was cooled, and its organic layer was then washed with water, water, a 10% aqueous solution of hydrochloric acid and a 5% aqueous solution of sodium hydrogencarbonate in order. The thus-washed organic solution was dried and concentrated to obtain 3',4'-dichloro-N-methylacetoacetoanilide.

Provenance & Evidence