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

HRID 1515822Notes

Reaction equation

[CH3:1][O:2][C:3](=[O:36])[C:4]1[CH:9]=[CH:8][C:7]([C:10]([C:17]2[N:25](S(C3C=CC=CC=3)(=O)=O)[C:20]3=[N:21][CH:22]=[CH:23][CH:24]=[C:19]3[CH:18]=2)=[CH:11][CH:12]2[CH2:16][CH2:15][CH2:14][CH2:13]2)=[C:6]([F:35])[CH:5]=1.[F-].C([N+](CCCC)(CCCC)CCCC)CCC>O1CCCC1>[CH3:1][O:2][C:3](=[O:36])[C:4]1[CH:9]=[CH:8][C:7]([C:10]([C:17]2[NH:25][C:20]3=[N:21][CH:22]=[CH:23][CH:24]=[C:19]3[CH:18]=2)=[CH:11][CH:12]2[CH2:16][CH2:15][CH2:14][CH2:13]2)=[C:6]([F:35])[CH:5]=1

Participants

Conditions

Temperature: 25 °C

Procedure

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.

Workup

customThe reaction was quenched with a saturated aqueous ammonium chloride solution (20 mL)
extractionThe mixture was extracted with ethyl acetate (2×100 mL)
washwashed with a saturated aqueous ammonium chloride solution (3×50 mL), brine
dry with materialdried over anhydrous sodium sulfate
concentrationconcentrated in vacuo

Sources & evidence

ORD record: ord-f20958a0f0b540988d3d7da4e4f6efb7
Source dataset: uspto-grants-2012_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08222416B2

Reaction notes

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