O-Xylene → HCID 18918418, compound

Participants

Reaction Steps

A mixture of the product of step (v) (1.1 g), xylene (110 ml), isoamyl alcohol (11 ml), 4-chloropyridine hydrochloride (1.1 g) and triethylamine (11 ml) was heated to reflux and stirred for 30 hours. During this period extra aliquots of 4-chloropyridine hydrochloride (6×1.1 g) and triethylamine (3×11 ml) were added at intervals. The reaction mixture was evaporated to dryness and the residue was purified by flash chromatography on silica by elution with methanol/dichloromethane/concentrated ammonia (20:200:1) to give 1-benzyl-3-(4-(4-pyridyl)piperazin-1-yl)-7-methoxy-4-quinolone (780 mg) as an orange-red solid: NMR (d6DMSO) δ 3.2 (4H, m), 3.75 (3H, s), 3.80 (4H, m), 5.55 (2H, s), 6.90 (2H, m), 7.30 (7H, m), 7.88 (1H, s), 8.13 (1H, d), 8.24 (2H, d); m/Z 427 (M+H)+.

Provenance & Evidence