反应详情

Add hydrogen chloride (4.00 equiv; 81.41 mmoles; 20.35 mL) to a solution of 4-[4-(4-Fluoro-3-trifluoromethyl-phenyl)-1-methyl-1H-imidazol-2-yl]-piperidine-1-carboxylic acid tert-butyl ester (8.7 g; 1.00 equiv; 20.35 mmoles) in dichloromethane (101.77 mL), at room temperature. Stir the solution at room temperature for 1 hour. Remove the solvent under reduced pressure, and dissolve the crude in isopropyl alcohol (101.77 mL). Add 4-chloro-1H-pyrazolo[3,4-d]pyrimidine (1.65 equiv; 33.58 mmoles; 5.19 g) and triethylamine (10 equiv; 203.54 mmoles; 28.37 mL). Stir the mixture at reflux for 1 hour. Remove the solvent under reduced pressure and triturate the crude in water overnight. Filter the solid and triturated in hot acetonitrile, filter and dry in vacuo. 4-{4-[5-(4-Fluoro-3-trifluoromethyl-phenyl)-3-methyl-1H-imidazol-2-yl]-piperidin-1-yl}-1H-pyrazolo[3,4-d]pyrimidine (8.42 g; 18.86 mmoles; 92.66% yield) is obtained as a light yellow solid.

1. customat room temperature
2. customRemove the solvent under reduced pressure
3. dissolutiondissolve the crude in isopropyl alcohol (101.77 mL)
4. stirringStir the mixture
5. temperatureat reflux for 1 hour
6. customRemove the solvent under reduced pressure
7. customtriturate the crude in water overnight
8. filtrationFilter the solid
9. customtriturated in hot acetonitrile
10. filtrationfilter
11. customdry in vacuo