Sodium hydride → 4-bromo-1-{[2-(trimethylsilyl)ethoxy]methyl}-1H-pyrrolo[2,3-b]pyridine

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Reaction Steps

A solution of 4-bromo-1H-pyrrolo[2,3-b]pyridine (10.0 g, 0.0508 mol) in DMF (40 mL) was cooled under nitrogen to 0° C. Sodium hydride (3.0 g, 0.075 mol) was added portionwise. The reaction was stirred for 1 hour. To this mixture, [2-(trimethylsilyl)ethoxy]methyl chloride (10.8 mL, 0.061 mol) was added slowly. After being stirred at 0° C. for 1 hour, the reaction was quenched with water and extracted with EtOAc twice. The combined extracts were washed with water, brine, dried over anhydrous sodium sulfate, filtered and concentrated under reduced pressure. The residue was purified by silica gel chromatography, eluting with 0-25% EtOAc/hexanes to afford 15.7 g (94.5%) of the desired product as a yellowish oil. LC/MS found: 327.1, 329.1 (M+H)+.

Provenance & Evidence