Tetrabutylammonium Fluoride → 4-[2-cyclopentyl-1-(1H-pyrrolo[2,3-b]pyridin-2-yl)-vinyl]-3-fluoro-benzoic acid methyl ester

Participants

Reaction Conditions

Reaction Steps

A mixture of 4-[1-(1-benzenesulfonyl-1H-pyrrolo[2,3-b]pyridin-2-yl)-2-cyclopentyl-vinyl]-3-fluoro-benzoic acid methyl ester (260 mg, 0.51 mmol) and tetrabutylammonium fluoride solution in tetrahydrofuran (1 M, 3 ml) was stirred at 25° C. for 16 h. The reaction was quenched with a saturated aqueous ammonium chloride solution (20 mL). The mixture was extracted with ethyl acetate (2×100 mL), washed with a saturated aqueous ammonium chloride solution (3×50 mL), brine, dried over anhydrous sodium sulfate and concentrated in vacuo to afford 4-[2-cyclopentyl-1-(1H-pyrrolo[2,3-b]pyridin-2-yl)-vinyl]-3-fluoro-benzoic acid methyl ester (160 mg, 85%) as a solid which was used in the next step without further purification; LC/MS m/e calcd for C22H21FN2O2 [M+H]+ 365.42, observed 365.1.

Provenance & Evidence