Pyridinium, 1-fluoro-, 1,1,1-trifluoromethanesulfonate (1:1) → 2-(7-(4-Cyclopentyl-3-(trifluoromethyl)benzyloxy)-9-(pyridin-2-yl)-2,3-dihydro-1H-pyrrolo[1,2-a]indol-1-yl)acetic Acid

Participants

Reaction Conditions

Reaction Steps

The 1st enantiomer (described as the enantiomer isolated and having the retention time of 15 min per the conditions reported in Example 1.7) of 2-(7-(4-cyclopentyl-3-(trifluoromethyl)benzyloxy)-2,3-dihydro-1H-pyrrolo[1,2-a]indol-1-yl)acetic acid (0.100 g, 0.219 mmol) was dissolved in anhydrous DCM (2.2 mL) using a plastic vial. The reaction was cooled to 0° C., and N-fluoropyridinium triflate (0.073 g, 0.295 mmol) was added. The reaction was allowed to warm to 25° C. and after 4 h there was a dark solution. The reaction was diluted with EtOAc (40 mL), washed with water/brine (2×10 mL), brine (10 mL), and dried over MgSO4. The solvent was evaporated in vacuo. The residue was purified by HPLC to give the titled compound (0.011 g) as a yellow solid. LCMS m/z=535.5 [M+H]+; 1H NMR (400 MHz, CD3CN) δ ppm 1.54-1.78 (m, 4H), 1.79-1.92 (m, 2H), 2.05 (dd, J=9.92, 4.48 Hz, 2H), 2.43-2.53 (m, 2H), 2.57-2.73 (m, 2H), 3.29-3.41 (m, 1H), 4.09-4.28 (m, 3H), 5.17 (d, J=3.54 Hz, 2H), 6.99 (dd, J=8.84, 2.27 Hz, 1H), 7.34 (d, J=8.84 Hz, 1H), 7.44 (d, J=2.27 Hz, 1H), 7.53 (t, J=6.25 Hz, 1H), 7.56-7.61 (m, 1H), 7.64-7.69 (m, 1H), 7.73 (s, 1H), 7.90 (d, J=8.34 Hz, 1H), 8.23 (td, J=7.86, 1.58 Hz, 1H), 8.66 (d, J=4.42 Hz, 1H).

Provenance & Evidence