[CH:1]1([O:7][C:8]2[CH:15]=[CH:14][C:11]([CH:12]=O)=[CH:10][CH:9]=2)[CH2:6][CH2:5][CH2:4][CH2:3][CH2:2]1.[N+:16]([CH3:19])([O-:18])=[O:17].C([O-])(=O)C.[NH4+]>C(O)(=O)C>[CH:1]1([O:7][C:8]2[CH:15]=[CH:14][C:11](/[CH:12]=[CH:19]/[N+:16]([O-:18])=[O:17])=[CH:10][CH:9]=2)[CH2:6][CH2:5][CH2:4][CH2:3][CH2:2]1A mixture of 4-cyclohexyloxy-benzaldehyde (2.84 g, 13.9 mmol) described in Manufacturing Example 79-1-1, nitromethane (3.74 mL, 69.5 mmol), ammonium acetate (2.14 g, 27.8 mmol) and acetic acid (30 mL) was stirred for 14 hours at 100° C. This mixture was cooled to room temperature, concentrated under a reduced pressure, and diluted with ethyl acetate. The organic layer was washed with saturated aqueous sodium chloride, dried over anhydrous magnesium sulfate, and filtered. The filtrate was concentrated under a reduced pressure to obtain the title compound (3.3 g).
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