Triethylamine → (7-Benzyloxy-3-nitro-quinolin-4-yl)[(2,2-dimethyl[1,3]dioxolan-4-yl)methyl]amine

Participants

Reaction Steps

Triethylamine (31.88 mL, 228.77 mmol, 1.5 eq) was added to a solution of 7-benzyloxy-4-chloro-3-nitroquinoline (48.00 g, 152.51 mmol, 1 eq) in dichloromethane (400 mL). Dropwise addition of 2,2-dimethyl-1,3-dioxolan-4-methanamine (20.0 g, 152.51 mmol, 1 eq) to the reaction mixture followed, which was then stirred at ambient temperature for 6 hours. The crude reaction mixture was concentrated under reduced pressure, and the resulting solid was triturated with water and then stirred for 1 hour. The precipitate was collected by filtration, washed with water, dried, suspended in diethyl ether (400 mL), sonicated, and the resulting precipitate material was collected by filtration. The product was dried under vacuum at 40° C. for 12 hours to afford 60.1 g of (7-benzyloxy-3-nitro-quinolin-4-yl)[(2,2-dimethyl[1,3]dioxolan-4-yl)methyl]amine as a yellow solid, mp 154-155° C. 1H-NMR (300 MHz, CDCl3) δ 9.74-9.62 (br m, 1H), 9.32 (s, 1H), 8.15 (d, J=9.4 Hz, 1H), 7.51-7.31 (m, 6H), 7.15 (dd, J=9.4, 2.7 Hz, 1H), 5.21 (s, 2H), 4.48-4.37 (m, 1H), 4.16-4.05 (m, 2H), 4.04-3.93 (m, 1H), 3.74 (dd, J=8.5, 5.9 Hz, 1H), 1.54 (s, 3H), 1.40 (s, 3H); MS (APCI) m/z 410.1 (M+H)+.

Provenance & Evidence