反应详情

温度

5 °C

A mixture of intermediate 26 (0.0083 mol) in THF (80 ml) was cooled to 5° C. under N2 flow. NH3/iPrOH (80 ml ) was added dropwise. The mixture was stirred at 5° C. for 1 hours, then brought to room temperature. The mixture was stirred at room temperature overnight, poured out into ice water and extracted with DCM. The organic layer was separated, washed with water, dried (MgSO4), filtered and the solvent was evaporated. The residue was purified by column chromatography over silica gel (15-40 μm) (eluent: DCM/MeOH/NH4OH 96/4/0.2). The pure fractions were collected and the solvent was evaporated. The residue was crystallized from CH3CN. The precipitate was filtered off and dried, yielding 1.37 g (33%) of 5-(3-chlorophenyl)-α-(1-methyl-1H-imidazol-5-yl)-α-(4—methylphenyl)-tetrazolo[1,5-a]quinazoline-7-methanamine .hydrate (1:1) (intermediate 27), mp. 150° C.

1. custombrought to room temperature
2. stirringThe mixture was stirred at room temperature overnight
3. extractionextracted with DCM
4. customThe organic layer was separated
5. washwashed with water
6. dry with materialdried (MgSO4)
7. filtrationfiltered
8. customthe solvent was evaporated
9. customThe residue was purified by column chromatography over silica gel (15-40 μm) (eluent: DCM/MeOH/NH4OH 96/4/0.2)
10. customThe pure fractions were collected
11. customthe solvent was evaporated
12. customThe residue was crystallized from CH3CN
13. filtrationThe precipitate was filtered off
14. customdried