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N-(6-methoxypyridin-3-yl)-4-(5,6-dimethoxy-3-methyl-1,4-benzoquinon-2-yl)methyl-2-acetoxybenzamide[ No CAS ]
Yield
Reaction Conditions
Operation in experiment
With triethylamine; In dichloromethane;
Example 134 N-(6-Methoxypyridin-3-yl)-4-(5,6-dimethoxy-3-methyl-1,4-benzoquinon-2-yl)methyl-2-acetoxybenzamide 2-Chloro-1,3-dimethylimidazolinium chloride (93 mg, 0.555 mmol), 5-amino-2-methoxypyridine (55 mg, 0.440 mmol) and triethylamine (44 mg, 0.440 mmol) were added to a methylene chloride solution (5 ml) of 4-(5,6-dimethoxy-3-methyl-1,4-benzoquinon-2-yl)methyl-2-acetoxybenzoic acid (137 mg, 0.366 mmol) in a nitrogen atmosphere and the resulting solution was stirred all the night through. The reaction solution was diluted with chloroform, then washed with water and dried, and the solvent was removed by distillation. The residue was purified by silica gel column chromatography (hexane: ethyl acetate = 3:1) to obtain the titled compound (31 mg, 0.065 mmol, 18percent).
Example 180 N-(6-Methoxypyridin-3-yl)-5-(5,6-dimethoxy-3-methyl-1,4-benzoquinon-2-yl)methyl-2-acetoxybenzamide 5-Amino-2-methoxypyridine (0.199 g, 1.604 mmol), triethylamine (0.162 g, 1.604 mmol) and <strong>[37091-73-9]2-chloro-1,3-dimethylimidazolinium chloride</strong> (0.271 g, 1.604 mmol) were added to a methylene chloride solution (100 ml) of 5-(5,6-dimethoxy-3-methyl-1,4-benzoquinon-2-yl)methyl-2-acetoxybenzoic acid (0.200 g, 0.535 mmol) and the resulting solution was stirred at room temperature for 10 hours. The reaction solution was poured into ice water and then extracted with methylene chloride. The extract was washed with water and then dried, and the solvent was removed by distillation. The obtained residue was purified by preparative thin-layer chromatography (ethyl acetate) and then recrystallized from ether to obtain the titled compound (0.109 g, 0.227 mmol, 42percent).
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