[Cl:1][C:2]1[CH:7]=[CH:6][C:5](I)=[C:4]([F:9])[CH:3]=1.[NH:10]1[CH2:14][CH2:13][CH2:12][C:11]1=[O:15].[C@@H]1(N)CCCC[C@H]1N.P([O-])([O-])([O-])=O.[K+].[K+].[K+].O1CCOCC1>[Cu]I>[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([N:10]2[CH2:14][CH2:13][CH2:12][C:11]2=[O:15])=[C:4]([F:9])[CH:3]=1A 100 mL sealed tube was charged with 4-chloro-2-fluoro-1-iodobenzene (0.498 ml, 3.90 mmol), pyrrolidin-2-one (0.598 ml, 7.80 mmol), (1R,2R)-cyclohexane-1,2-diamine (0.0703 ml, 0.585 mmol), potassium phosphate (1.66 g, 7.80 mmol), copper (I) iodide (0.0223 g, 0.117 mmol), and 1,4-dioxane (4.00 ml, 46.8 mmol), then flushed with argon, sealed, and placed in a 110° C. oil bath for 17 hours. The reaction mixture was filtered through a pad of silica gel, eluting with EtOAc and DCM, then the filtrate was concentrated to yield a brown oil This was purified by column chromatography using a 40 g ISCO column, eluting with a gradient of 3-5% MeOH/DCM over 30 minutes to give 1-(4-chloro-2-fluorophenyl)pyrrolidin-2-one (0.903 g, 108% yield) as a yellow solid.
Wird geladen…
