Dimethylformamide → methyl 4-[(2-methyl-3,4-dihydroquinolin-1(2H)-yl)methyl]-3-[(methylsulfonyl)oxy]benzoate

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A mixture of methyl 4-(bromomethyl)-3-[(methylsulfonyl)oxy]benzoate (0.70 g, 2.2 mmol), 2-methyl-1,2,3,4-tetrahydroquinoline (0.39 g, 2.6 mmol), potassium carbonate (0.60 g, 4.3 mmol) and N,N-dimethylformamide (14 mL) was stirred at 70° C. for 23 hr. The reaction mixture was diluted with ethyl acetate, washed with water and saturated brine, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (hexane/ethyl acetate=10/1-2/1) to give the title compound (0.63 g, yield 75%) as a pale-yellow oil.

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