Acetic Acid → HCID 71523527, compound

Participants

Reaction Conditions

Reaction Steps

To a cooled mixture (0-5° C.) of 3-(1-(4-chlorobenzoyl)-5-methoxy-3-methyl-1H-indol-2-yl)propanoic acid (40 mg, 0.11 mmol) in CH2Cl2 (1 mL), 1′1′-carbonyldiimidazole (CDI) (17.4 mg, 0.11 mmol) was added. After the mixture was stirred for 2 h at 0-5° C., methansulfonamide (10 mg, 0.11 mmol) and diazobicyclo-[5.4.0]undec-7-ene (DBU) (16.1 μL, 0.11 mmol) were added. The mixture was left stirring overnight. Glacial AcOH (13.2 μL) was added, the reaction mixture was diluted with CH2Cl2 (1 mL), and the organic layer was washed with 10% NaH2PO4 (pH 4) (1×1 mL) and water (3 mL), dried over Na2SO4, filtered, and concentrated under reduced pressure to give a crude residue that was purified by flash chromatography (SiO2, ethyl acetate/hexane, 0.5% AcOH gradient) to afford the title compound as a bright yellow solid (32 mg, 66%). C21H21ClN2O5S, Mr=448.92; 1H NMR (400 MHz, DMSO-d6) d: 2.21 (s, 3H), 2.55 (t, J=7.2 Hz, 2H), 3.11 (t, J=7.2 Hz, 2H), 3.16 (s, 3H), 3.75 (s, 3H), 6.43 (d, J=9.2 Hz, 1H), 6.64 (dd, J=9.0 Hz, 1H), 7.02 (d, J=2.4 Hz, 1H), 7.64-7.69 (m, 4H); LCMS (ESI) tR: 2.74 min (>95%, UV254, ELSD), m/z: 249.1 [M+1]+.

Provenance & Evidence