Dimethylformamide → HCID 86687628, compound

Participants

Reaction Steps

A round-bottom flask was charged with perfluorophenyl 1-(4-chloro-2-methylphenyl)isoquinoline-6-sulfonate (Intermediate DDDDD; 59.9 mg, 0.120 mmol), 3-methyl-1,2,4-thiadiazol-5-amine (27.6 mg, 0.240 mmol), cesium carbonate (117 mg, 0.360 mmol), and DMF (0.6 mL). The vial was sonicated for 20 s, and the mixture was stirred further for 2 h. The mixture was diluted with EtOAc and 0.5 N aq. HCl. The layers were separated, and the organic extract was washed with brine, dried over sodium sulfate, filtered, and concentrated. The residue was purified by chromatography on silica gel (25-g Interchim 15-micron column, 0-5% MeOH/DCM) to give 1-(4-chloro-2-methylphenyl)-N-(3-methyl-1,2,4-thiadiazol-5-yl)isoquinoline-6-sulfonamide (38.94 mg, 0.090 mmol, 75% yield) as a white solid. 1H NMR (400 MHz, DMSO-d6) δ=8.72 (d, J=5.7 Hz, 1H), 8.60 (d, J=1.8 Hz, 1H), 8.16 (d, J=5.8 Hz, 1H), 7.89 (dd, J=1.9, 8.9 Hz, 1H), 7.69 (d, J=8.9 Hz, 1H), 7.52 (d, J=1.9 Hz, 1H), 7.44-7.39 (m, 1H), 7.33 (d, J=8.1 Hz, 1H), 2.27 (s, 3H), 1.97 (s, 3H). m/z (ESI) 431.0 (M+H)+.

Provenance & Evidence