Cesium carbonate → Ethyl 2-(7-(4-Chloro-3-(trifluoromethyl)benzyloxy)-1,2,3,4-tetrahydrocyclopenta[b]indol-3-yl)acetate

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Reaction Steps

A mixture of ethyl 2-(7-hydroxy-1,2,3,4-tetrahydrocyclopenta[b]indol-3-yl)acetate (222 mg, 0.856 mmol), 1-chloro-4-(chloromethyl)-2-(trifluoromethyl)benzene (240 mg, 1.048 mmol), and cesium carbonate (165 mg, 0.856 mmol) in DMF (5 mL) was stirred at room temperature. After 3 days, more cesium carbonate (165 mg, 0.856 mmol) was added. After stirring for an additional 2 d, the mixture was extracted with water and CH2Cl2. The organics were dried over MgSO4, filtered and concentrated. The residue was purified by silica gel column chromatography to give the title compound as a white solid (258 mg). LCMS m/z=452.1 [M+H]+; 1H NMR (400 MHz, CDCl3) δ ppm 1.29 (t, J=7.2 Hz, 3H), 2.06-2.14 (m, 1H), 2.47-2.54 (m, 1H), 2.71-2.86 (m, 4H), 3.51-3.57 (m, 1H), 4.17-4.25 (m, 2H), 5.10 (s, 2H), 6.82 (dd, J=8.8, 2.5, 1H), 6.96 (d, J=2.5 Hz, 1H), 7.21 (dd, J=8.8, 0.32 Hz, 1H), 7.49-7.52 (m, 1H), 7.58 (dd, J=8.2, 2.6 Hz, 1H), 7.80 (d, J=1.92 Hz, 1H), 8.48 (s, 1H).

Provenance & Evidence