Oxalyl chloride → HCID 58997050, compound

Participants

Reaction Conditions

Reaction Steps

To a cold (0° C.), stirred, mixture of 8-quinoline carboxylic acid (177 mg, 1.02 mmol) in CH2Cl2 (10 mL) was added DMF (0.5 mL) followed by oxalyl chloride (0.45 mL, 5.16 mmol). The mixture was warmed to room temperature. After 20 minutes the mixture was concentrated under reduced pressure and provided a pink solid. To a solution of COMPOUND 249 (93 mg, 0.30 mmol) in THF (20 mL) was added the pink solid from above followed by DIPEA (1.10 mL, 6.31 mmol). The resultant mixture was stirred at room temperature for 2.5 hours then diluted with 1.0 N NaOH (20 mL) and EtOAc (60 mL). The phases were separated and the organic phase was washed with 1.0 N NaOH (3×10 mL), dried (Na2SO4), and concentrated. Purification of the crude material by column chromatography on silica gel (20:1:1 CH2Cl2-MeOH—NH4OH) followed by radial chromatography on silica gel (1 mm plate, 100:1:1 CH2Cl2-MeOH—NH4OH) provided 36 mg (26%) of COMPOUND 269 as a white foam. 1H NMR (CDCl3) δ 1.50-2.00 (m, 4H), 2.09 (s, 6H), 2.62-2.99 (m, 3H), 3.30-3.40 (m, 1H), 3.69-3.98 (m, 4H), 4.99-5.10 (m, 1H), 7.09 (dd, 2H, J=7.5, 4.8 Hz), 7.35-7.45 (m, 3H), 7.52-7.61 (m, 2H), 7.83-7.87 (m, 1H), 8.14-8.18 (m, 1H), 8.32 (d, 2H, J=3.9 Hz), 8.90-8.95 (m, 1H); ES-MS m/z 488 (M+Na).

Provenance & Evidence