反应详情

To a solution of 2,6-difluoro-N-[3-(4-formyl-1H-benzimidazol-2-yl)-1H-pyrazol-4-yl]-benzamide (30 mg, 0.08 mmol) and morpholine (14 mg, 0.16 mmol) in CH2Cl2 (5 ml) and THF (2 ml) was added 3 Å molecular sieves (1 g) followed by sodium triacetoxyborohydride (50 mg, 0.24 mmol) and the mixture stirred at ambient temperature under a nitrogen atmosphere for 2 h. The reaction mixture was filtered through Celite, reduced in vacuo then purified by flash column chromatography [SiO2, EtOAc-hexane (1:1, 1:0), then CH2Cl2-MeOH (95:5)] affording 2,6-difluoro-N-[3-(4-morpholin-4-yl-methyl-1H-benzimidazol-2-yl)-1H-pyrazol-4-yl]-benzamide (13 mg) as a cream solid. (LC/MS: Rt 1.80, [M+H]+ 439).

1. filtrationThe reaction mixture was filtered through Celite
2. customthen purified by flash column chromatography [SiO2, EtOAc-hexane (1:1, 1:0)