Acetic Acid → 1-[6-(4-tert-Butyl-cyclohexyloxy)-naphthalen-2-ylmethyl]-4-hydroxy-piperidine-4-carboxylic acid

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The compound was prepared in a manner similar as to that described for 1-[6-(4-tert-Butyl-cyclohexyloxy)-naphthalen-2-ylmethyl]-4-ethyl-piperidine-4-carboxylic acid 4-Hydroxy-piperidine-4-carboxylic acid (0.0561 g, 0.387 mmol), 6-(4-tert-Butyl-cyclohexyloxy)-naphthalene-2-carbaldehyde (0.100 g, 0.322 mmol), Acetic acid (0.064 mL, 1.1 mmol) and Sodium cyanoborohydride (30.126 mg, 0.47939 mmol) to give 51 mg 1-[6-(4-tert-Butyl-cyclohexyloxy)-naphthalen-2-ylmethyl]-4-hydroxy-piperidine-4-carboxylic acid (36%). ESI-LCMS 440 (M+H). 1H NMR (DMSO-d6, 400 MHz): δ (ppm) 9.37-9.69 (m, 1H), 7.75-8.07 (m, 4H), 7.50-7.64 (m, 1H), 7.43 (d, J=2.0 Hz, 1H), 7.13-7.27 (m, 1H), 4.47 (d, J=3.8 Hz, 3H), 3.05-3.47 (m, 4H), 1.97-2.29 (m, 4H), 1.83 (d, J=13.3 Hz, 4H), 1.02-1.45 (m, 5H), 0.89 (s, 9H)

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