Benzylamine → HCID 22034129, compound

Participants

Reaction Steps

Part A. A solution of 4-chloro-6-methyl-3-nitropyridone (5.0 g, 26.5 mmol) in acetonitrile (93 mL) was treated with benzylamine (2.89 mL, 26.5 mmol) and diisopropylethylamine (5.54 mL, 31.8 mmol). The mixture was heated to reflux for 4 hrs., then cooled to ambient temperature and allowed to stir for 12 hrs. The mixture was partitioned between dichloromethane and water (200 mL each), and the aqueous layer was extracted with dichloromethane (200 mL). The extracts were washed in sequence with water (200 mL) and combined, and the resulting precipitate was collected by filtration. The filtrate was dried over sodium sulfate, refiltered and evaporated to afford a second crop of crystalline product, 4-benzylamino-6-methyl-3-nitropyridone (6.74 g total, 26.0 mmol, 98%). m.p. 246-247° C. TLC RF 0.35 (10:90 isopropanol-ethyl acetate). 1H NMR (300 MHz, CDCl3): d 10.48 (1H, br s), 9.69 (1H, br s), 7.41-7.26 (5H, m), 5.66 (1H, s), 4.57 (2H, d, J=5.5 Hz), 2.26 (3H, s). MS (NH3-CI): m/e 261 (10), 260 (70), 226 (100).

Provenance & Evidence