[CH:1]([CH:3]1[CH2:8][C:7](=[O:9])[CH2:6][CH2:5][NH:4]1)=[CH2:2].Cl[CH2:11][C:12]1[CH:17]=[CH:16][CH:15]=[C:14]([O:18][CH:19]([CH3:21])[CH3:20])[CH:13]=1.C([O-])([O-])=O.[K+].[K+]>C(#N)C>[CH:19]([O:18][C:14]1[CH:13]=[C:12]([CH:17]=[CH:16][CH:15]=1)[CH2:11][N:4]1[CH2:5][CH2:6][C:7](=[O:9])[CH2:8][CH:3]1[CH:1]=[CH2:2])([CH3:21])[CH3:20]2-vinylpiperidin-4-one (4.85 g, 38.7 mmol) in acetonitrile (40 ml) was added 1-(chloromethyl)-3-isopropoxybenzene (7.16 g, 38.7 mmol) and finely ground K2CO3 (16.1 g, 116 mmol). The mixture was stirred at 60° C. for 12 hrs. The solution was filtered, and the solvent was evaporated under reduced pressure. The residue was purified by column chromatography on silica gel Biotage 65i, eluting with 15% ethyl acetate/hexanes.
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