Sodium Hydroxide → Sodium 3-(Carboxylatomethyl)-7-(4-cyclopentyl-3-(trifluoromethyl)benzyloxy)-1,2,3,4-tetrahydrocyclopenta[b]indole-3-carboxylate

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Reaction Conditions

Reaction Steps

In a 500 mL flask was placed ethyl 7-(4-cyclopentyl-3-(trifluoromethyl)benzyloxy)-3-(2-ethoxy-2-oxoethyl)-1,2,3,4-tetrahydrocyclopenta[b]indole-3-carboxylate (24.1 g, 43.2 mmol) in isopropanol (275 mL). Sodium hydroxide solution (20%, 129.5 mL, 130 mmol) was added and the mixture was heated at 100° C. (bath) for 2.5 h. The mixture was cooled, filtered, washed with isopropanol, and dried overnight under vacuum at 40° C. to give the title compound (17.5 g). LCMS m/z=502.6 [M−2Na+3H]+.

Provenance & Evidence