Furfural → 4-((E)-2-furan-2-yl-vinyl)benzoic acid ethyl ester

Beteiligte Stoffe

Reaktionsschritte

60% Sodium hydride (0.48 g, 12 mmol) was suspended in anhydrous tetrahydrofuran (10 mL) under nitrogen atmosphere, and diethyl 4-ethoxycarbonyl benzylphosphonate (3.6 g, 12 mmol) prepared from ethyl 4-bromomethylbenzoate and triethylphosphite according to the methods as similar to those of Manufacturing Example 93-1-1 was added at room temperature and stirred for 30 minutes at room temperature. Furfural (1 g, 10.4 mmol) was then added at room temperature, and stirred for 2 hours at room temperature. The reaction mixture was partitioned into water and ethyl acetate on an ice bath (0° C.). The organic layer was washed with water and saturated aqueous sodium chloride and dried over anhydrous magnesium sulfate, and the solvent was evaporated under a reduced pressure. The residue was purified by NH silica gel column chromatography (ethyl acetate:heptane=1:20) to obtain the title compound (1.07 g, 42%).

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