反应详情

温度

30 °C

(Z)-4-(4-chloroquinolin-2(1H)-ylidene)-3-isopropyl-1H-pyrazol-5(4H)-one (0.8 g, 2.78 mmol) was stirred in DMF at ambient temperature and Di-t-butyl dicarbonate (3 g, 13.9 mmol) was added followed by triethylamine (1.9 mL, 13.9 mmol). After 24 hrs, the reaction mixture was diluted with EtOAc and worked up with DI water. The organic phase was washed with brine, dried over MgSO4, and concentrated to dryness and purified by LC-MS. The resulting (Z)-tert-butyl 2-(1-(tert-butoxycarbonyl)-3-isopropyl-5-oxo-1H-pyrazol-4(5H)-ylidene)-4-chloroquinoline-1(2H)-carboxylate (0.072 g, 0.14 mmol) was stirred in ethanol and 4-aminothiophenol was added. The reaction mixture was heated at 30° C. for 4 hrs, concentrated to dryness, and carried out to the next step without further purification. The resulting (Z)-tert-butyl 4-(4-aminophenylthio)-2-(1-(tert-butoxycarbonyl)-3-isopropyl-5-oxo-1H-pyrazol-4(5H)-ylidene)quinoline-1(2H)-carboxylate was dissolved in pyridine (1-2 mL) and treated with methanesulfonyl chloride (0.035 mL, 0.44 mmol). After 1 hr, the solvent was evaporated and the solid redissolved in dichloromethane. Trifluoroacetic acid (0.9 mL) was added dropwise. The final compound was purified by LC-MS to yield Example 21. 1H NMR (400 MHz, DMSO-d6) δ ppm 0.99 (d, J=6.82 Hz, 6H) 2.58 (bs, 1H) 3.17 (s, 3H) 6.69 (s, 1H) 7.44 (d, J=8.59 Hz, 2H) 7.63 (t, J=7.58 Hz, 1H) 7.72 (d, J=8.59 Hz, 2H) 7.83-7.94 (m, 2H) 8.13 (d, J=8.34 Hz, 1H) 10.40 (s, 1H); ESI-MS: m/z calc'd for C22H22N4O3S2 454.57. found 455.2 (M+H)+.

1. washThe organic phase was washed with brine
2. dry with materialdried over MgSO4
3. concentrationconcentrated to dryness
4. custompurified by LC-MS
5. concentrationconcentrated to dryness
6. customcarried out to the next step without further purification
7. dissolutionThe resulting (Z)-tert-butyl 4-(4-aminophenylthio)-2-(1-(tert-butoxycarbonyl)-3-isopropyl-5-oxo-1H-pyrazol-4(5H)-ylidene)quinoline-1(2H)-carboxylate was dissolved in pyridine (1-2 mL)
8. waitAfter 1 hr
9. customthe solvent was evaporated
10. dissolutionthe solid redissolved in dichloromethane
11. additionTrifluoroacetic acid (0.9 mL) was added dropwise
12. customThe final compound was purified by LC-MS
13. customto yield Example 21