Ethanol → N-(6-fluoro-2-naphthyl)carbamic acid ethyl ester

関与物質

反応手順

To a suspension of 6-fluoro-2-naphthoic acid (450 mg, 2.37 mmol) and triethylamine (0.66 mL, 4.73 mmol) in 1,4-dioxane (30 mL) at room temperature, is added DPPA (0.77 mL, 3.55 mmol). After stirring at room temperature for 2.5 hours, ethanol (1.38 mL, 23.7 mmol) is added and the reaction is heated to reflux temperature for 12 hours. After cooling to room temperature, the mixture is partitioned between EtOAc and water. The organic layer is washed with brine, dried (Na2SO4) and concentrated by rotary evaporator to give an oil. Flash chromatography on silica gel (3:1 hexanes/EtOAc) gives N-(6-fluoro-2-naphthyl)carbamic acid ethyl ester as an oil.

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