Water → 5-bromo-1H-pyrrolo[2,3-b]pyridine

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Reaction Steps

5-Bromo-2,3-dihydro-1H-pyrrolo[2,3-b]pyridine (600 mg, 3.01 mmol) and 2,3-dichloro-5,6-dicyano-1,4-benzoquinone described in Preparation Example R-4 (753 mg, 3.31 mmol) was dissolved in toluene (15 mL), and the solution was refluxed for 40 minutes under nitrogen atmosphere. The reaction solution was cooled to room temperature, water and ethyl acetate were added thereto, the organic layer was partitioned, the organic layer was washed with brine and dried over anhydrous magnesium sulfate. The solvent was evaporated in vacuo, the residue was purified by silica gel column chromatography (hexane:ethyl acetate=5:1), and the title compound (260 mg, 1.32 mmol, 44%) was obtained as a white solid.

Provenance & Evidence