[F:1][C:2]1[CH:7]=[CH:6][CH:5]=[C:4]([N+:8]([O-])=O)[C:3]=1[C:11]1[CH2:16][C:15]([CH3:18])([CH3:17])[CH2:14][C:13]([CH3:20])([CH3:19])[CH:12]=1.[Cl-].[NH4+].O>C(O)C.[Fe]>[F:1][C:2]1[C:3]([C:11]2[CH2:16][C:15]([CH3:18])([CH3:17])[CH2:14][C:13]([CH3:20])([CH3:19])[CH:12]=2)=[C:4]([NH2:8])[CH:5]=[CH:6][CH:7]=1To a solution of 1-fluoro-3-nitro-2-(3,3,5,5-tetramethylcyclohex-1-enyl)benzene (2.25 g, 8.11 mmol) produced in Example (97b) in ethanol (45 mL) were added ammonium chloride (150 mg, 2.8 mmol), water (15 mL) and iron powder (1.6 g, 28.65 mmol), followed by stirring for 2 hours at an external temperature of 90° C. The reaction mixture was filtered and the filtrate was concentrated under reduced pressure. Ethyl acetate and water were added to the obtained residue and extraction was performed with ethyl acetate. The separated organic layer was washed with brine and then dried over anhydrous sodium sulfate. The desiccant was filtered off and the filtrate was concentrated under reduced pressure. The resultant residue was purified by NH silica gel column chromatography (ethyl acetate/heptane) to give 632 mg of the title compound as a light yellow oil.
読み込み中…
