反应详情

A vial was charged with perfluorophenyl 1-(2-chloro-3′-fluoro-5-methoxy-[1,1′-biphenyl]-4-yl)isoquinoline-6-sulfonate (INTERMEDIATE TTTT; 68.6 mg, 0.112 mmol), 1,3,4-thiadiazol-2-amine (12.51 mg, 0.124 mmol), and cesium carbonate (110 mg, 0.337 mmol). The vial was flushed with Ar (g), then acetonitrile (562 μl) was added. After stirring overnight, the mixture was diluted with EtOAc and 0.5 N aq. HCl. The layers were separated, and the aq. layer was extracted with EtOAc (2×). The combined organic extracts were dried over sodium sulfate, filtered, and concentrated. The residue was purified by chromatography on silica gel (12-g Redi-Sep Gold column, 0-4% MeOH/DCM). Some fractions were discarded, and the remainder containing product were combined and concentrated to 1-(2-chloro-3′-fluoro-5-methoxy-[1,1′-biphenyl]-4-yl)-N-(1,3,4-thiadiazol-2-yl)isoquinoline-6-sulfonamide (35.19 mg, 0.067 mmol, 59.4% yield) as a white solid. 1H NMR (400 MHz, DMSO-d6) δ=14.50 (br. s., 1H), 8.80 (s, 1H), 8.71 (d, J=5.7 Hz, 1H), 8.58 (d, J=1.8 Hz, 1H), 8.14 (d, J=5.6 Hz, 1H), 7.95-7.89 (m, 1H), 7.87-7.79 (m, 1H), 7.62-7.53 (m, 2H), 7.49-7.41 (m, 2H), 7.32 (dt, J=3.0, 8.5 Hz, 1H), 7.27 (s, 1H), 3.71 (s, 3H). m/z (ESI) 527.2 (M+H)+.

1. customThe vial was flushed with Ar (g)
2. additionacetonitrile (562 μl) was added
3. additionthe mixture was diluted with EtOAc and 0.5 N aq. HCl
4. customThe layers were separated
5. extractionthe aq. layer was extracted with EtOAc (2×)
6. dry with materialThe combined organic extracts were dried over sodium sulfate
7. filtrationfiltered
8. concentrationconcentrated
9. customThe residue was purified by chromatography on silica gel (12-g Redi-Sep Gold column, 0-4% MeOH/DCM)
10. additionthe remainder containing product