5-Bromo-2-iodopyridine → HCID 67228144, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of 5-bromo-2-iodopyridine (4.27 g, 15.0 mmol) in anhydrous tetrahydrofuran (60 mL) at 0° C. was added a solution of isopropylmagnesium chloride in tetrahydrofuran (2 M, 7.5 mL, 15.04 mmol) dropwise. After stirring for 30 min at 0° C., a solution of 1-(1-benzenesulfonyl-1H-pyrrolo[2,3-b]pyridin-2-yl)-2-cyclopentyl-ethanone (prepared as in Example 43, 1.38 g, 3.76 mmol) in dry tetrahydrofuran (10 mL) was added dropwise. The resulting mixture was stirred for 14 h at room temperature, quenched with a saturated sodium chloride, extracted with ethyl acetate, dried over anhydrous sodium sulfate, and concentrated in vacuo. Purification by flash column chromatography (QingDao silica gel, 200-300 mesh, 20% ethyl acetate/hexanes) afforded 1-(1-benzenesulfonyl-1H-pyrrolo[2,3-b]pyridin-2-yl)-1-(5-bromo-pyridin-2-yl)-2-cyclopentyl-ethanol (870 mg, 15%) as a light yellow solid: LC/MS m/e calcd for C25H24BrN3O3S [M+H]+ 527.46, observed 527.

Provenance & Evidence