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

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Reaction Steps

To a solution of ethyl 2-(7-hydroxy-1,2,3,4-tetrahydrocyclopenta[b]indol-3-yl)acetate (166.0 mg, 0.641 mmol) and 5-(chloromethyl)-2-cyclohexylbenzonitrile (147.0 mg, 0.629 mmol) in N,N-dimethylformamide (15 mL) was added cesium carbonate (246.0 mg, 0.755 mmol). The mixture was stirred at room temperature for 41 h. The mixture was diluted with ethyl acetate, filtered through Celite®, concentrated under reduced pressure and purified by silica gel column chromatography to provide the title compound as a yellow foam (185.3 mg). LCMS m/z=457.5 [M+H]+; 1H NMR (400 MHz, CDCl3) δ ppm 1.18-1.28 (m, 1H), 1.30 (t, J=7.20 Hz, 3H), 1.41-1.52 (m, 4H), 1.79 (dd, J=12.82, 1.33 Hz, 1H), 1.85-1.93 (m, 4H), 2.06-2.15 (m, 1H), 2.50 (dd, J=16.80, 11.24 Hz, 1H), 2.68-2.86 (m, 4H), 2.94-3.04 (m, 1H), 3.49-3.61 (m, 1H), 4.16-4.25 (m, 2H), 5.06 (s, 2H), 6.82 (dd, J=8.78, 2.46 Hz, 1H), 6.97 (d, J=2.53 Hz, 1H), 7.21 (d, J=8.72 Hz, 1H), 7.37 (d, J=8.21 Hz, 1H), 7.62 (dd, J=8.15, 1.71 Hz, 1H), 7.71 (d, J=1.52 Hz, 1H), 8.47 (bs, 1H).

Provenance & Evidence