[F:1][C:2]1[CH:3]=[C:4]([OH:11])[CH:5]=[CH:6][C:7]=1[N+:8]([O-:10])=[O:9].Cl.Cl[CH2:14][C:15]1[CH:20]=[CH:19][C:18]([CH3:21])=[CH:17][N:16]=1.C(=O)([O-])[O-].[K+].[K+].[I-].[K+]>C(#N)C>[F:1][C:2]1[CH:3]=[C:4]([CH:5]=[CH:6][C:7]=1[N+:8]([O-:10])=[O:9])[O:11][CH2:14][C:15]1[CH:20]=[CH:19][C:18]([CH3:21])=[CH:17][N:16]=1
To a 3-neck, 1 L flask equipped with mechanical stirring, a nitrogen inlet, and temperature probe, 3-fluoro-4-nitrophenol (30 g, 191 mmol) was added to a suspension of 2-(chloromethyl)-5-methylpyridine hydrochloride (33.4 g, 187 mmol), potassium carbonate (57.5 g, 412 mmol), potassium iodide (31.1 g, 187 mmol), and acetonitrile (400 mL) and the mixture was then heated to 60° Celsius. After 3 hours the solvent was evaporated to dryness and the residue was partitioned between EtOAc and water and the organic layer was separated, dried, filtered and concentrated to dryness. To the resulting residue was added IPA (200 mL) and the mixture was heated to 70° Celsius where the suspension became homogeneous. The solution was allowed to cool to RT over 2 hours and placed in the freezer overnight. The solids were collected by filtration and were rinsed with IPA (100 mL) followed by heptanes (2×100 mL) to afford the title compound. 1H NMR (400 MHz, DMSO-d6) δ 8.44 (s, 1H), 8.16 (t, J=9.2, 1H), 7.76-7.62 (m, 1H), 7.45 (d, J=7.9, 1H), 7.30 (dd, J=13.7, 2.5, 1H), 7.07 (dd, J=9.3, 1.9, 1H), 5.30 (s, 2H), 2.31 (s, 3H).
Wird geladen…
