[CH3:1][O:2][C:3](=[O:11])[C:4]1[CH:9]=[C:8]([OH:10])[CH:7]=[N:6][CH:5]=1.[Br:12][C:13]1[CH:14]=[C:15]([C:20](=[O:22])[CH3:21])[CH:16]=[CH:17][C:18]=1F.C1OCCOCCOCCOCCOCCOC1.[F-].[K+]>C(#N)C>[CH3:1][O:2][C:3](=[O:11])[C:4]1[CH:9]=[C:8]([O:10][C:18]2[CH:17]=[CH:16][C:15]([C:20](=[O:22])[CH3:21])=[CH:14][C:13]=2[Br:12])[CH:7]=[N:6][CH:5]=1
Methyl-5-hydroxynicotinate (1.0 g, 6.53 mmol), 3′-bromo-4′-fluoroacetophenone (1.42 g, 6.53 mmol), 18-crown-6 (155.3 mg, 0.59 mmol) and potassium fluoride (40 wt. % on alumina, 996 mg, 6.86 mmol) were dissolved in ACN (10 mL). The reaction was refluxed for three days. After cooling the mixture was quenched with 2N aqueous potassium carbonate solution, extracted with ether, dried with sodium sulphate, filtered, evaporated and purified by silica gel chromatography (ethyl acetate:n-heptane 1:4). 635 mg (yield: 28%) of the pure compound was obtained.
Wird geladen…
