Guanidine Hydrochloride → HCID 68671207, compound

Participants

Reaction Steps

To a stirred solution of 1-methoxy-5-methylhexane-2,4-dione (1.08 g, 6.8 mmol) in EtOH (15 mL) was added guanidine hydrochloride (1.3 g, 13.7 mmol). 5 min later, a solution of Na2CO3 (1.45 g, 13.7 mmol) in H2O was added and the resulting mixture was heated to reflux for 20 h. The reaction was cooled to room temperature and the solvent was removed. The residue was dissolved in EtOAc (20 mL) and H2O (20 mL). The layers were separated and the aqueous layer was extracted with EtOAc (2×20 mL). The combined organic layer was washed with brine, dried with Na2SO4 and concentrated under reduced pressure. The residue was purified by column chromatography (50% EtOAc in hexanes) to provide 4-isopropyl-6-(methoxymethyl)pyrimidin-2-amine (482 mg, 39%). 1H NMR (CDCl3): d 6.43 (s, 1H), 6.11 (s, 2H), 4.16 (s, 2H), 3.26 (s, 3H), 2.56-2.66 (m, 1H), 1.03 (d, J=6.9 Hz, 6H).

Provenance & Evidence