Pyridine → HCID 3825544, compound

Participants

Reaction Steps

To a solution of 4n-propylbenzenesulphonyl chloride (159 mg, 0.728 mmol) in dichloromethane (4 mL) was added pyridine (140 μL, 1.74 mmol) and the mixture was stirred under N2 for 5 min, after which time 6-aminoquinoline (100 mg, 0.694 mmol) was added. The resulting mixture was stirred for 2 h at room temperature, then saturated NaHCO3 solution (10 mL) was added and the mixture was extracted into ethyl acetate (20 mL). The organic phase was washed with brine, dried (Na2SO4), filtered and evaporated to give a residue that was purified using flash chromatography to afford a white solid (210 mg, 93%), single spot at Rf 0.71 (ethyl acetate). mp 180.1-180.7° C., HPLC purity 99+% (tR 2.37 min in 10% water-acetonitrile). 1H NMR (CDCl3): δ 8.83 (1H, dd, J=4.2, 1.7 Hz), 8.05 (1H, d, J=8.4 Hz), 7.97 (1H, d, J=9.2 Hz), 7.70 (2H, d, J=8.2 Hz), 7.57 (1H, d, J=2.5 Hz), 7.40-7.34 (2H, m), 7.22 (2H, m), 6.85 (1H, s, N—H, 2.57 (2H, t, J=7.2 Hz), 1.57 (2H, sextet, J=7.2 Hz), 0.87 (3H, t, J=7.3 Hz). LCMS: 325.23 (M−). FAB-MS (MH+, C18H18N2O2S): calcd 327.1167, found 327.1167.

Provenance & Evidence