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To a solution of (R)-1-(2,6-dimethylphenyl)-3-isopropyl-5-oxopyrrolidine-3-carboxylic acid (25 mg, 0.091 mmol) and methanesulfonyl chloride (9 μL, 0.12 mmol) in THF (0.9 mL) at 0° C. was added diisopropylethylamine (0.047 mL, 0.27 mmol). The solution was stirred 15 min at 0° C., warmed to ambient temperature, and 3-amino-5-(trifluoromethyl)benzonitrile (34 mg, 0.18 mmol) was subsequently added and the solution was heated at 55° C. overnight. The following day, the reaction mixture was purified via preparative HPLC, which failed to provide the desired product in sufficient purity. To a solution of the crude mixture (14 mg) in 2 mL THF was added aqueous NaOH (3 mL, 1.0 M) and the solution was stirred at 50° C. overnight. The following day, the solution was quenched with 10% HCl, partitioned with ethyl acetate, and the organic layer was separated. The organics were subsequently dried with sodium sulfate, concentrated in vacuo, and purified via preparative HPLC to afford the desired amide as a white solid. 1H NMR (400 MHZ, CDCl): δ 10.28 (s, 1H), 8.39 (s, 1H), 8.30 (s, 1H), 8.05 (s, 1H), 7.04-7.17 (m, 3H), 3.99 (d, J=11.2 Hz, 1H), 3.67 (d, J=10.8 Hz, 1H), 3.05 (d, J=17.2 Hz, 1H), 2.70 (d, J=17.2 Hz, 1H), 2.38 (septet, J=6.8 Hz, 1H), 2.17 (s, 3H), 2.00 (s, 3H), 0.98 (t, J=6.8 Hz, 6H). LC-MS Rt (retention time): 2.81 min; MS: (ES) m/z 444 (M+H+).

1. temperaturewarmed to ambient temperature
2. temperaturethe solution was heated at 55° C. overnight
3. customThe following day, the reaction mixture was purified via preparative HPLC, which