反应详情

A solution of tert-butyl (3S)-3-{[8-(2-chlorophenyl)-9-(4-chlorophenyl)-9H-purin-6-yl]amino}piperidine-1-carboxylate (120 mg, 0.22 mmol) was stirred in dichloromethane (7 mL) and trifluoroacetic acid (3 mL) for 16 h. The reaction was concentrated in vacuo. The crude product was dissolved in ethyl acetate and washed with saturated NaHCO3. The aqueous layer was extracted twice with ethyl acetate. The combined organic layer was washed with brine and dried with MgSO4. The crude material was purified by silica gel column chromatography using 0-100% CMA 80/ethyl acetate to yield 64 mg (65%) of 8-(2-chlorophenyl)-9-(4-chlorophenyl)-N-[(3S)-piperidin-3-yl]-9H-purin-6-amine. 1H NMR (300 MHz, CHLOROFORM-d) δ ppm 1.55-1.86 (m, 4 H) 2.01-2.14 (m, 1 H) 2.66-2.85 (m, 2 H) 2.87-3.04 (m, 1 H) 3.32 (dd, J=11.77, 2.35 Hz, 1 H) 4.39 (br. s., 1 H) 6.20 (d, J=5.84 Hz, 1 H) 7.12-7.66 (m, 8 H) 8.47 (s, 1 H), [M+H]+ 439.6.

1. concentrationThe reaction was concentrated in vacuo
2. dissolutionThe crude product was dissolved in ethyl acetate
3. washwashed with saturated NaHCO3
4. extractionThe aqueous layer was extracted twice with ethyl acetate
5. washThe combined organic layer was washed with brine
6. dry with materialdried with MgSO4
7. customThe crude material was purified by silica gel column chromatography