Dimethylamine → 8-(4-(dimethylamino)butoxy)-7-methoxyquinolin-2(1H)-one

Participants

Reaction Steps

A solution of dimethylamine (1.5 mL, 2M tetrahydrofuran, 3 mmol) was added to a solution of 8-(4-bromobutoxy)-4-(3,5-dichloropyridin-4-ylamino)-7-methoxyquinolin-2(1H)-one (146 mg, 0.3 mmol) and DMSO (3 mL). After 2.5 h, the reaction was poured into 10% K2CO3 (30 mL) and extracted with dichloromethane (40 mL×2). The combined extracts were dried, filtered, concentrated, and purified by silical gel chromatography (1:0→4:1; dichloromethane:methanol w/1% conc. NH4OH solution) and then reverse-phase HPLC (1:9→1:1; acetonitrile:water) to give 443,5-dichloropyridin-4-ylamino)-8-(4-(dimethylamino)butoxy)-7-methoxyquinolin-2(1H)-one: 1H NMR (400 MHz, DMSO-d6): δ 10.29 (s, 1H), 8.81 (s, 1H), 8.75 (s, 2H), 7.87 (d, 1H), 7.04 (d, 1H), 4.77 (s, 1H), 3.99 (t, 2H), 3.90 (s, 3H), 2.27 (t, 2H), 2.13 (s, 6H), 1.73 (m, 2H), 1.54 (m, 2H); MS (ESI): 451.0.

Provenance & Evidence