反应详情

Ethyl 2-(7-(3-cyano-4-isopropoxybenzyloxy)-1,2,3,4-tetrahydrocyclopenta[b]indol-3-yl)acetate (1.32 g, 3.05 mmol) was dissolved in dioxane (34 mL) and 1.0 M aqueous LiOH (9.16 mL, 9.16 mmol) was added. The reaction was stirred at room temperature for 6 h and then warmed to 35° C. and stirred for one additional hour. After cooling to room temperature, the reaction was acidified to pH 3 with 1.0 M HCl and partitioned between water and ethyl acetate. The organics were removed and the aqueous layer was extracted twice with ethyl acetate. The combined extracts were dried over sodium sulfate, filtered and concentrated to give the title compound (1.23 g). LCMS m/z=405.6 [M+H]+; 1H NMR (400 MHz, DMSO-d6) δ ppm 1.32 (d, J=5.9 Hz, 6H), 2.03-2.13 (m, 1H), 2.35 (dd, J=15.9, 9.0 Hz, 1H), 2.58-2.77 (m, 4H), 3.41-3.51 (m, 1H), 4.79 (septet, J=5.9 Hz, 1H), 5.01 (s, 2H), 6.69 (dd, J=8.8, 2.4 Hz, 1H), 6.91 (d, J=2.4 Hz, 1H), 7.19 (d, J=8.6 Hz, 1H), 7.28 (d, J=8.8 Hz, 1H), 7.70 (dd, J=8.8, 2.3 Hz, 1H), 7.76 (d, J=2.1 Hz, 1H), 10.45 (s, 1H), 12.1 (bs, 1H).

1. temperaturewarmed to 35° C.
2. stirringstirred for one additional hour
3. temperatureAfter cooling to room temperature
4. custompartitioned between water and ethyl acetate
5. customThe organics were removed
6. extractionthe aqueous layer was extracted twice with ethyl acetate
7. dry with materialThe combined extracts were dried over sodium sulfate
8. filtrationfiltered
9. concentrationconcentrated