Dimethylformamide → HCID 68183104, compound

Participants

Reaction Steps

To a solution of 4-(4-chlorophenyl)-2-(morpholin-4-yl)-5,6-dihydrothieno[2,3-c]pyridin-7(4H)-one (0.478 g, 1.37 mmol, single enantiomer of unknown absolute configuration) in DMF (8.9 mL, 110 mmol) was added N-bromosuccinimide (0.2561 g, 1.439 mmol), and the mixture was stirred at room temperature for 2 hours. Reaction was quenched via addition of 10% aqueous sodium thiosulfate solution (30 mL), and then diluted with EtOAc (100 mL) and water (10 mL) with sonication to encourage complete dissolution of solids. The layers were separated, and aqueous layer was extracted 1×EtOAc (50 mL). The combined organic layers were washed 1× brine (10 mL), dried over Na2SO4, filtered, and concentrated in vacuo. The crude residue was adsorbed to Celite (15 mL) and dryloaded onto a silica gel column. Column chromatography (eluent: 0-100% EtOAc:hexanes) then afforded 3-bromo-4-(4-chlorophenyl)-2-(morpholin-4-yl)-5,6-dihydrothieno[2,3-c]pyridin-7(4H)-one (526 mg, 90%). LCMS: (FA) ES+ 427, 429, 431. 1H NMR (400 MHz, CDCl3) δ: 7.26 (d, J=8.3 Hz, 2H), 7.07 (d, J=8.3 Hz, 2H), 5.41 (d, J=4.1 Hz, 1H), 4.20-4.06 (m, 2H), 3.87 (dd, J=4.6, 4.6 Hz, 4H), 3.52 (dt, J=14.4, 3.9 Hz, 1H), 3.35-3.24 (m, 2H), 3.24-3.10 (m, 2H).

Provenance & Evidence