F[C:2]1[CH:3]=[CH:4][C:5]([N+:9]([O-:11])=[O:10])=[C:6]([CH3:8])[CH:7]=1.[I:12][C:13]1[N:14]=[C:15]([CH3:18])[NH:16][CH:17]=1.C(=O)([O-])[O-].[Na+].[Na+].O>CN(C)C=O>[I:12][C:13]1[N:14]=[C:15]([CH3:18])[N:16]([C:2]2[CH:3]=[CH:4][C:5]([N+:9]([O-:11])=[O:10])=[C:6]([CH3:8])[CH:7]=2)[CH:17]=1A mixture of 5-fluoro-2-nitrotoluene (7.9 g), 4-iodo-2-methylimidazole (9.0 g) and sodium carbonate (4.5 g) was heated with stirring in dimethylformamide (50 cm3) at 120° for 16 hours under nitrogen. The mixture was poured into water (50 cm3) and extracted with chloroform (3×100 cm3). The combined and dried (MgSO4) organic extracts were concentrated in vacuo to give a solid which was chromatographed on silica (Merck "MK 60.9385" [Trade Mark]) eluting with ethyl acetate:toluene, 1:5 by volume. Combination and evaporation of appropriate fractions afforded a solid which was recrystallised from dichloromethane-hexane to give the title compound, m.p. 146°-8°, (4.0 g).
読み込み中…
