反应详情

6-(2-methoxy-4-hydroxyphenyl)-3-1H-benzoimidazol-2-yl-1H-indazole, prepared in example 24(d), (46 mg, 0.13 mmol) was heated in pyridinium chloride (0.5 g) at 180° C. for 2 h. The reaction was allowed to cool, and was quenched with sat. NaHCO3 (15 mL) and extracted with EtOAc (2×20 mL). Organics were dried (Na2SO4) and concentrated in vacuo. Purification by silica gel chromatography (60% THF/hexanes) gave 26 mg (59%) of the title compound as a white solid. 1H NMR (300 MHz, DMSO-d6) δ 13.49 (s, 1H), 12.94 (s, 1H), 9.49 (s, 1H), 9.39 (s, 1H), 8.43 (d, 1H, J=8.4 Hz), 7.71–7.74 (m, 2H), 7.50 (d, 1H, J=6.9 Hz), 7.43 (dd, 1H, J=8.4, 1.2 Hz), 7.16–7.23 (m, 3H), 6.45 (d, 1H, J=2.1 Hz), 6.35 (dd, 1H, J=8.4, 2.1 Hz). MS (ES) [m+H]/z calc'd 343. found 343. [m−H]/z calc'd 341. found 341.

1. temperatureto cool
2. customwas quenched with sat. NaHCO3 (15 mL)
3. extractionextracted with EtOAc (2×20 mL)
4. dry with materialOrganics were dried (Na2SO4)
5. concentrationconcentrated in vacuo
6. customPurification by silica gel chromatography (60% THF/hexanes)