反应详情

To a stirred solution of 3-(3-styryl-4,5-dihydro-1H-indazol-6-yloxy)-phenylamine (50 mg, 0.15 mmol) and N,N-diisopropylethylamine (54 μl, 0.31 mmol) in 5 mL of CH2Cl2, was added benzoyl chloride (36 μl, 0.31 mmol). After 15 min, the reaction mixture was diluted with CH2Cl2 and washed sequentially with 0.5N HCl, saturated sodium bicarbonate solution and brine, dried (MgSO4) and concentrated under reduced pressure. To a stirred solution of the residue in 1,4-dioxane was added 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) (35 mg, 0.15 mmol). After 1 h, the reaction mixture was concentrated under reduced pressure and the residue was chromatographed on silica gel eluting hexanes/EtOAc (2:1). In this manner, N-[3-(2-benzoyl-3-styrl-1H-indazol-6-yloxy)-phenyl]-benzamide was prepared as a rust colored solid (90 mg, ˜quantitative): 1H NMR (CDCl3) δ 8.13 (s, 1H), 8.02 (d, 2H, J=7.0 Hz), 7.94 (d, 1H, J=8.7 Hz), 7.74 (d, 2H, J=6.8 Hz), 7.57-7.19 (m, 17H), 6.84 (d, 1H, J=8.3 Hz).

1. washwashed sequentially with 0.5N HCl, saturated sodium bicarbonate solution and brine
2. dry with materialdried (MgSO4)
3. concentrationconcentrated under reduced pressure
4. waitAfter 1 h
5. concentrationthe reaction mixture was concentrated under reduced pressure
6. customthe residue was chromatographed on silica gel
7. washeluting hexanes/EtOAc (2:1)
8. customIn this manner, N-[3-(2-benzoyl-3-styrl-1H-indazol-6-yloxy)-phenyl]-benzamide was prepared as a rust colored solid (90 mg, ˜quantitative)