Trifluoroacetic acid → 2-(4-(4-Nitro-3-(trifluoromethyl)phenylamino)cyclohexyloxy)acetic acid

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To a solution of tert-butyl 2-(4-(4-nitro-3-(trifluoromethyl)phenylamino)cyclohexyloxy)acetate (1 g, 2.39 mmol) in dichloromethane (30 ml) was added trifluoroacetic acid (5 ml). The resulting solution was stirred for 2 hours at room temperature and then concentrated under vacuum. The resulting solution was diluted with dichloromethane (200 ml), washed with water (100 ml), dried over anhydrous sodium sulfate, filtered, and then concentrated under vacuum to afford 800 mg (92%) of 2-(4-(4-nitro-3-(trifluoromethyl)phenylamino)cyclohexyloxy)acetic acid as yellow oil. 1H NMR (300 MHz, DMSO): δ 12.5 (broad s, 1H), 8.07 (d, J=9.3 Hz, 1H), 7.45 (d, J=7.8 Hz, 1H), 7.07 (s, 1H), 6.87 (dd, J=2.4 Hz, 9.3 Hz, 1H), 4.03 (s, 2H), 3.32-3.46 (m, 2H), 1.91-2.03 (m, 4H), 1.17-1.41 (m, 4H).

Provenance & Evidence