反应详情

4-bromophenol (1.27 g, 7.35 mmol) was combined with 5-fluoro-1H-indazole (1.000 g, 7.35 mmol), CuI (69.9 mg, 0.367 mmol), K3PO4 (3.282 g, 15.4 mmol), toluene (15 mL), and dimethylethylenediamine (0.158 mL, 1.47 mmol). This was refluxed as a mixture for 3 d. The reaction was cooled and partitioned between ethyl acetate and sat. NH4Cl. The aqueous was extracted with ethyl acetate and the combined organics were dried over MgSO4. Purification by silica gel flash chromatography (ethyl acetate in heptane) gave 4-(5-fluoro-indazol-2-yl)-phenol (0.114 g) impure with the indazole starting material. Used as is. The other regioisomer was also observed but was separated by chromatography. MS (M+1): 229.2.

1. temperatureThis was refluxed as a mixture for 3 d
2. temperatureThe reaction was cooled
3. custompartitioned between ethyl acetate and sat. NH4Cl
4. extractionThe aqueous was extracted with ethyl acetate
5. dry with materialthe combined organics were dried over MgSO4
6. customPurification by silica gel flash chromatography (ethyl acetate in heptane)