Water → 3-(4-Benzyloxy-2-fluoro-5-methoxy-benzyl)-1-triisopropylsilanyl-1H-pyrrolo[2,3-b]pyridine

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Reaction Steps

3-(4-Benzyloxy-2-fluoro-5-methoxy-benzyl)-1H-pyrrolo[2,3-b]pyridine (656, 0.877 g, 2.42 mmol) was dissolved in N,N-dimethylformamide (30 mL). Sodium hydride (60% dispersion in mineral oil, 140 mg, 3.6 mmol) was added at room temperature. After 20 minutes, triisopropylsilyl chloride (513 μL, 2.42 mmol) was added dropwise. The reaction was stirred for four hours. The reaction was poured into water and extracted with ethyl acetate. The organic portion was washed with saturated sodium bicarbonate and brine. The organic portion was dried over anhydrous sodium sulfate and filtered. The filtrate was adsorbed onto silica gel and purified by silica gel chromatography using 20-80% ethyl acetate/hexane. The resulting material was purified a second time with 5-30% gradient ethyl acetate/hexane to provide the desired compound (657, 831 mg, 66%). MS (ESI) [M+H+]+=519.4.

Provenance & Evidence