N,N-Dimethylaniline → 7-(4-Bromo-2,6-dimethylphenyl)-4-chloro-2,5-dimethyl-5,7-dihydropyrrolo[2,3-d]pyrimidin-6-one

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Reaction Conditions

Reaction Steps

To a suspension of 7-(4-bromo-2,6-dimethylphenyl)-4-hydroxy-2,5-dimethyl-5,7-dihydropyrrolo[2,3-d]pyrimidin-6-one (10.0 g) in phosphoryl chloride (25.7 mL) was added N,N-dimethylaniline (2.6 mL) and the mixture was heated at 120° C. for 6 hours. After cooling to room temperature the mixture was poured into ice-cold water and extracted with ethyl acetate. The organic layer was washed with a sodium hydrogencarbonate aqueous solution and brine, dried over anhydrous sodium sulfate and filtered. The filtrate was concentrated under reduced pressure to give a solid. The solid was washed with diisopropylether to afford 7-(4-bromo-2,6-dimethylphenyl)-4-chloro-2,5-dimethyl-5,7-dihydropyrrolo[2,3-d]pyrimidin-6-one (8.0 g)

Provenance & Evidence