I[C:2]1[CH:8]=[CH:7][CH:6]=[CH:5][C:3]=1[NH2:4].[C:9]([O:13][C:14]([N:16]1[CH2:21][CH2:20][C:19](=O)[CH2:18][CH2:17]1)=[O:15])([CH3:12])([CH3:11])[CH3:10].N12CCN(CC1)CC2>CN(C=O)C.C([O-])(=O)C.[Pd+2].C([O-])(=O)C>[C:9]([O:13][C:14]([N:16]1[CH2:21][CH2:20][C:19]2[NH:4][C:3]3[CH:5]=[CH:6][CH:7]=[CH:8][C:2]=3[C:18]=2[CH2:17]1)=[O:15])([CH3:12])([CH3:10])[CH3:11]General Method: A mixture of 2-iodoaniline (0.315 g, 1.44 mmol), 4-oxo-1-piperidinecarboxylic acid tert-butyl ester (0.860 g, 4.31 mmol), 1,4-diazabicyclo[2.2.2]octane (Dabco™) (0.483 mL, 4.31 mmol) and palladium acetate (0.016 g, 0.072 mmol) in dry DMF (7 mL) was degassed via vacuum/argon purging, and then it was heated to 110° C. for 3.5 h. The reaction mixture was subsequently cooled to room temperature and partitioned between ethyl acetate and water. The organic layer was separated, dried (MgSO4), filtered and evaporated to dryness. The residue was chromatographed (SiO2/hexanes:ethyl acetate, 1:1) to give the title compound (0.068 g, 17%) as an off-white solid. 1H NMR (400 MHz, CDCl3) δ 7.88 (s, 1H), 7.45 (d, J=7.6 Hz, 1H), 7.31 (d, J=7.6 Hz, 1H), 7.12 (m, 2H), 4.64 (s, 2H), 3.82 (s, 2H), 2.82 (s, 2H), 1.50 (s, 9H); LCMS: m/e 273 (M+H)+.
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