Water → 2-(3-cyano-2-cyclohexyl-5-methyl-4-(2-(pyrrolidin-1-ylsulfonyl)benzyl)-1H-pyrrol-1-yl)acetic acid

Participants

Reaction Steps

To a solution of ethyl 2-(3-cyano-2-cyclohexyl-5-methyl-4-(2-(pyrrolidin-1-ylsulfonyl)benzyl)-1H-pyrrol-1-yl)acetate (485 mg, 0.975 mmol) in tetrahydrofuran (2.9 mL), and water (0.98 mL), was added solid lithium hydroxide monohydrate (40.9 mg, 0.975 mmol). The reaction was stirred at room temperature for 45 minutes, after which analysis by LCMS indicated that the reaction was not complete. After 20 more minutes, an additional equivalent of lithium hydroxide monohydrate (40.9 mg) was added, and the reaction was stirred at room temperature for an additional 20 minutes, after which it was determined to be complete by LCMS analysis. Concentration of the reaction mixture, followed by acidification with aqueous 3M hydrochloric acid solution (0.65 mL), extraction with dichloromethane (1×50 mL), then ethyl acetate (2×50 mL), drying (sodium sulfate), filtering and concentration afforded 2-(3-cyano-2-cyclohexyl-5-methyl-4-(2-(pyrrolidin-1-ylsulfonyl)benzyl)-1H-pyrrol-1-yl)acetic acid (442 mg, 0.941 mmol, 97% yield). 1H NMR (400 MHz, CDCl3) δ (ppm) 7.96 (d, 1H), 7.43 (app. t, 1H), 7.32 (dd, 1H), 7.04 (d, 1H), 4.57 (s, 2H), 4.29 (s, 2H), 3.33-3.36 (m, 4H), 2.50 (m, 1H), 1.93-1.96 (m, 7H), 1.70-1.88 (m, 8H), 1.28-1.32 (m, 2H).

Provenance & Evidence