p-Toluenesulfonic acid → HCID 24851913, compound

Participants

Reaction Steps

p-Toluenesulfonic acid (172 mg, 1.0 mmol) was added to a solution of 8-(cyclopentyloxy)-4-(3,5-dichloropyridin-4-ylamino)-7-methoxy-1-(2-(tetrahydro-2H-pyran-2-yloxy)ethyl)quinolin-2(1H)-one (2.4 g, 4.4 mmol) and methanol (100 mL). After stifling overnight, the reaction was concentrated, diluted with dichloromethane (100 mL), and then washed with sat'd NaHCO3 (20 mL) followed by water (20 mL). The organic layer was dried, filtered, concentrated, and recrystallized from dichloromethane/petroleum ether (1:2) to give 8-(cyclopentyloxy)-4-(3,5-dichloropyridin-4-ylamino)-1-(2-hydroxyethyl)-7-methoxyquinolin-2(1H)-one: 1H NMR (400 MHz, DMSO-d6): δ 8.74 (s, 2H), 8.73 (s, 1H), 7.91 (d, 1H), 7.11 (d, 1H), 4.92 (s, 1H), 4.65 (t, 2H), 4.59 (m, 1H), 4.50 (t, 1H), 3.90 (s, 3H), 3.32 (m 2H), 1.80-1.48 (m, 8H); MS (ESI): 463.9.

Provenance & Evidence