Water → 2-(7-(4-Cyclohexyl-3-(trifluoromethyl)benzyloxy)-1,2,3,4-tetrahydrocyclopenta[b]indol-3-yl)acetic Acid

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Reaction Steps

A mixture of ethyl 2-(7-(4-chloro-3-(trifluoromethyl)benzyloxy)-1,2,3,4-tetrahydrocyclopenta[b]indol-3-yl)acetate (50 mg, 0.111 mmol), 0.5 M cyclohexylzinc(II) bromide (0.5 M in THF, 3 mL, 1.5 mmol), and bis(tri-t-butylphosphine)palladium (3 mg, 5.87 μmol) were stirred under reflux for 18 h. The mixture was allowed to cool to room temperature before water (1 mL), MeOH (1 mL) and LiOH hydrate (70 mg, 1.668 mmol) were added. The mixture was stirred at room temperature for 2 h. The mixture was purified by HPLC. Fractions containing product were basified with 1 M NaHCO3 and partially concentrated. The residue was extracted with 0.5 M citric acid and CH2Cl2. The organics were dried over MgSO4, filtered and concentrated to give the title compound as a tanned sticky solid (14.4 mg). LCMS m/z=472.2 [M+H]+; 1H NMR (400 MHz, CDCl3) δ ppm 1.38-1.50 (m, 4H), 1.76-1.85 (m, 6H), 2.11-2.17 (m, 1H), 2.58-2.65 (m, 1H), 2.75-2.93 (m, 5H), 3.56-3.60 (m, 1H), 5.07 (s, 2H), 6.84 (dd, J=8.8, 2.5 Hz, 1H), 7.00 (d, J=2.4 Hz, 1H), 7.21 (d, J=8.8 Hz, 1H), 7.46 (d, J=8.1 Hz, 1H), 7.59 (d, J=8.1 Hz, 1H), 7.70 (d, J=1.2 Hz, 1H), 8.27 (s, 1H).

Provenance & Evidence