反应详情

To the mixture of 2-methyl-6-(4-morpholinyl)-1-(1-naphthalenylmethyl)-1H-benzimidazole-4-carboxylic acid, prepared as described in Example 20 (70 mg, 0.174 mmol) in Tetrahydrofuran (THF) (5 mL) was added in LiAlH4 (19.85 mg, 0.523 mmol) at 0° C. and the reaction mixture was stirred at rt for 1 h. Then LiAlH4 (19.85 mg, 0.523 mmol) was added in and the reaction mixture was stirred at rt for another hour. The reaction mixture was cooled to 0° C. and quenched with water (0.04 ml), NaOH (15%, 0.04 ml) then water (0.12 ml). After the resultant mixture was stirred at room temperature for 2 h, anhydrous MgSO4 was added and the reaction mixture was filtered through celite and washed with EtOAc. Evaporation of the solvent gave the crude product. The crude product was purified on a silica column (0-4% MeOH/DCM) to give the solid (12 mg, 17%). 1H NMR (400 MHz, DMSO-d6) δ ppm 2.38 (s, 3H), 2.91-3.05 (m, 4H), 3.64-3.74 (m, 4H), 4.89 (d, J=5.56 Hz, 2H), 5.12 (t, J=5.81 Hz, 1H), 5.95 (s, 2H), 6.33 (d, J=6.82 Hz, 1H), 6.81 (d, J=2.02 Hz, 1H), 6.97 (d, J=1.77 Hz, 1H), 7.34 (t, J=7.71 Hz, 1H), 7.54-7.74 (m, 2H), 7.85 (d, J=8.08 Hz, 1H), 8.01 (d, J=7.58 Hz, 1H), 8.25 (d, 1H). MS(ES+) m/z 388.0 [M+H]+.

1. customprepared
2. stirringwas stirred at rt for another hour
3. temperatureThe reaction mixture was cooled to 0° C.
4. customquenched with water (0.04 ml), NaOH (15%, 0.04 ml)
5. stirringAfter the resultant mixture was stirred at room temperature for 2 h
6. additionanhydrous MgSO4 was added
7. filtrationthe reaction mixture was filtered through celite
8. washwashed with EtOAc
9. customEvaporation of the solvent
10. customgave the crude product
11. customThe crude product was purified on a silica column (0-4% MeOH/DCM)