2-Methyl-5-Nitroaniline → 2-(2-Methyl-5-nitroanilino)-4-(3-pyridyl)pyrimidine

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Reaction Steps

A 250 ml reactor, equipped with a mechanical stirrer and a reflux condenser, was charged with 2-chloro-4-(3-pyridyl)-pyrimidine (0.5 g, 2.6 mmol), 2-amino-4-nitrotoluene (0.5 g, 3.2 mmol), n-butanol (15 ml) and concentrated HCl (5 drops) and the mixture was refluxed for 38 hours. Then, the mixture was cooled, and 6 N NaOH was added to pH 8. The solvent was evaporated under reduced pressure and water (20 ml) was added to the residue, followed by extraction with dichloromethane (2×20 ml). The combined organic phase was concentrated to dryness to give the crude N-(2-methyl-5-nitrophenyl)-4-(3-pyridyl)-pyrimidine-amine, which was purified by column chromatography to yield a product having 80% purity. The residue was re-slurried twice in methanol (2×2 ml) and in water (3 ml) and dried under reduced pressure.

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