反应详情

To a solution of 3-bromo-4-nitrophenol (4.1 g) in N,N-dimethylformamide (40 ml) were sequentially added cesium carbonate (9.2 g) and methyl iodide (1.5 ml), and the solution was stirred overnight at room temperature. Water was added thereto, the solution was stirred, extracted with ethyl acetate, then sequentially washed with water and brine, dried over anhydrous magnesium sulfate, and then the solvent was evaporated in vacuo. The residue was purified by silica gel column chromatography (hexane-ethyl acetate system) to provide 2-bromo-4-methoxy-1-nitrobenzene (4.1 g). Synthesized from 7-benzyloxy-3-bromo-1,2-dihydronaphthalene and 2-bromo-4-methoxy-1-nitrobenzene according to an analogous synthetic method to Preparation Example 107, 7-benzyloxy-3-(5-methoxy-2-nitrophenyl)-1,2-dihydronaphthalene (3.4 g) was used according to an analogous synthetic method to Example 30 to provide the title compound (1.6 g).