Ammonia → HCID 24852032, compound

Participants

Reaction Steps

Titanium (IV) isopropoxide (496 mg, 1.74mmol) and 2-(8-(cyclopentyloxy)-4-(3,5-dichloropyridin-4-ylamino)-7-methoxy-2-oxoquinolin-1(2H)-yl)acetaldehyde (400 mg, 0.87 mmol) were added sequentially to a solution of dimethylamine hydrochloride (144 mg, 1.74 mmol), triethylamine (176 mg, 1.74 mmol), and absolute ethanol (20 mL). After stirring overnight, sodium borohydride (50 mg, 1.3 mmol) was added. After an additional 3 h, the reaction was poured into aq. ammonia (30 mL) and then filtered—washing with dichloromethane. The filtrate was extracted with dichloromethane (50 mL×3). The combined extracts were dried, filtered, concentrated, and purified by reverse-phase HPLC to give 8-(cyclopentyloxy)-4-(3,5-dichloropyridin-4-ylamino)-1-(2-(dimethylamino)ethyl)-7-methoxyquinolin-2(1H)-one: 1H NMR (400 MHz, DMSO-d6): δ 8.75 (s, 1H), 8.73 (s, 2H), 7.91 (d,1H), 7.12 (d, 1H), 4.94 (s, 1H), 4.71 (t, 2H), 4.58 (m, 1H), 3.90 (s, 3H), 2.22 (m, 2H), 2.04 (s, 6H), 1.80-1.50 (m, 8H); MS (ESI): 491.0.

Provenance & Evidence