反应详情

温度

80 °C

To a solution of 1-(biphenyl-4-ylmethyl)-4,6-difluoro-5-iodo-2-(methylsulfonyl)-1H-benzimidazole (Intermediate 5, 0.650 g, 1.24 mmol) and ethyl 3-hydroxycyclopentanecarboxylate (Intermediate 9, 0.784 g, 4.96 mmol) in 4 mL of DMF was added DBU (0.747 mL, 4.96 mmol) dropwise via syringe. The reaction was heated overnight at 80° C., and then diluted with EtOAc and H2O. The layers were separated and the aqueous layer was extracted with EtOAc. The combined organic layers were washed with brine, dried over Na2SO4, filtered, and concentrated. Purification of the resulting residue by flash chromatography (3-25% EtOAc/hexanes) afforded the desired product. LCMS: calculated for C28H25F2IN2O3 602.41, observed m/e 602.9 (M+H)+ (Rt 2.57/4 min).

1. customThe layers were separated
2. extractionthe aqueous layer was extracted with EtOAc
3. washThe combined organic layers were washed with brine
4. dry with materialdried over Na2SO4
5. filtrationfiltered
6. concentrationconcentrated
7. customPurification of the resulting residue by flash chromatography (3-25% EtOAc/hexanes)