反应详情

A vial was charged with perfluorophenyl 1-(4-chloro-5-cyano-2-methoxyphenyl)isoquinoline-6-sulfonate (INTERMEDIATE VVVV, 154.38 mg, 0.285 mmol), 1,2,4-thiadiazol-5-amine (34.6 mg, 0.343 mmol), and cesium carbonate (279 mg, 0.856 mmol). Acetonitrile (1427 μl) was added, and the mixture was stirred for 1 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 (12-g Redi-Sep Gold column, 0-10% MeOH/DCM, product eluted over a long period of time). The resulting white solid was taken up in MeOH and filtered. The collected solid was washed with MeOH (2×), dried under a stream of N2 (g), then dried under vacuum to give 1-(4-chloro-5-cyano-2-methoxyphenyl)-N-(1,2,4-thiadiazol-5-yl)isoquinoline-6-sulfonamide (76.6 mg, 0.167 mmol, 58.6% yield) as a white solid. 1H NMR (400 MHz, DMSO-d6) δ=7.43 (d, J=5.7 Hz, 1H), 7.32 (d, J=1.7 Hz, 1H), 7.21 (s, 1H), 6.90 (d, J=5.6 Hz, 1H), 6.70 (s, 1H), 6.62-6.55 (m, 1H), 6.52-6.46 (m, 1H), 6.37 (s, 1H), 2.50 (s, 3H). m/z (ESI) 458.1 (M+H)+.

1. customThe layers were separated
2. extractionthe organic extract
3. washwas washed with brine
4. dry with materialdried over sodium sulfate
5. filtrationfiltered
6. concentrationconcentrated
7. customThe residue was purified by chromatography on silica gel (12-g Redi-Sep Gold column, 0-10% MeOH/DCM, product
8. washeluted over a long period of time)
9. filtrationfiltered
10. washThe collected solid was washed with MeOH (2×)
11. dry with materialdried under a stream of N2 (g)
12. customdried under vacuum