[OH:1][C:2]1[C:11]2[C:6](=[CH:7][CH:8]=[CH:9][CH:10]=2)[NH:5][C:4](=[O:12])[C:3]=1[C:13]([O:15]C)=O.[CH:17]1([NH2:23])[CH2:22][CH2:21][CH2:20][CH2:19][CH2:18]1.C(OCC)C>C1(C)C=CC=CC=1>[CH:17]1([NH:23][C:13]([C:3]2[C:4](=[O:12])[NH:5][C:6]3[C:11]([C:2]=2[OH:1])=[CH:10][CH:9]=[CH:8][CH:7]=3)=[O:15])[CH2:22][CH2:21][CH2:20][CH2:19][CH2:18]1Methyl 4-hydroxy-2-oxo-1,2-dihydroquinoline-3-carboxylate (Example 70) (2.70 g, 12.3 mmol) was suspended in toluene (27 mL), and cyclohexylamine (1.40 g, 14.1 mmol) was added. The reaction was heated at 115° C. for 5 hours, then cooled to room temperature. Diethyl ether (50 mL) was added, and the resultant precipitate was collected by filtration to give N-cyclohexyl-4-hydroxy-2-oxo-1,2-dihydroquinoline-3-carboxamide (1.22 g, 35%) as an off white solid. M.p.: 221° C. 1H NMR (400 MHz, DMSO-d6) δ 1.37 (m, 4H), 1.55 (m, 1H), 1.68 (m, 2H), 1.88 (m, 2H), 3.86 (m, 1H), 7.28 (t, J=8.0 Hz, 1H), 7.36 (d, J=8.0 Hz, 1H), 7.68 (t, J=7.6 Hz, 1H), 7.95 (d, J=8.0 Hz, 1H), 10.35 (d, J=7.6 Hz, 1H), 11.83 (bs, 1H). MS 287 (MH+).
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