1,8-Diazabicyclo(5.4.0)undec-7-ene → 3-(3-chloro-4-(quinolin-2-ylmethoxy)phenyl)-4-(pyridin-4-yl)furan-2(5H)-one

Participants

Reaction Conditions

Reaction Steps

To a stirred solution of 2-(3-chloro-4-(quinolin-2-ylmethoxy)phenyl)acetic acid (6.0 g, 0.01 mol) in acetonitrile (50 mL) were added TEA (2.58 mL, 0.02 mol) and 2-bromo-1-(pyridin-4-yl)ethanone hydrobromide (6.16 g, 0.02 mol) at RT under an inert atmosphere. The reaction mixture was stirred for 30 minutes, cooled to 0° C., and then DBU (5.5 mL, 0.03 mol) was added. The reaction was stirred for an additional 15 minutes and then quenched with HCl (1 N) and extracted with DCM (2×300 mL). The combined organic layers were washed with water, dried over Na2SO4, and concentrated in vacuo to obtain the crude product. The crude material was purified via silica gel column chromatography to afford 3-(3-chloro-4-(quinolin-2-ylmethoxy)phenyl)-4-(pyridin-4-yl)furan-2(5H)-one (500 mg) as a solid. 1H NMR (500 MHz, d6-DMSO): δ 8.64 (d, J=7.8 Hz, 2H), 8.50-8.44 (m, 1H), 8.04-7.98 (m, 2H), 7.8 (t, J=7.2 Hz, 1H), 7.74 (d, J=7.6 Hz, 1H), 7.64 (t, J=7.2 Hz, 1H), 7.50 (s, 1H), 7.38-7.32 (m, 3H), 7.26-7.22 (m, 1H), 5.55 (s, 2H), 5.38 (s, 2H). MS: M+H: m/z=429.1. HPLC: 90%, (Condition-I).

Provenance & Evidence