Pyridine → Ethyl 3-oxo-4-phenylbutanoate

関与物質

反応条件

反応手順

To a solution of phenylacetyl chloride (1 mL, 7.56 mmol) was added dropwise a solution of 2,2-dimethyl-1,3-dioxane-4,6-dione (1.09 g, 7.56 mmol) and pyridine (1.3 mL) in CH2Cl2 (20 mL) at 0° C. The solution was stirred for 30 min at 0° C., then allowed to warm slowly to rt and stirred overnight. The reaction mixture was then washed with 10% aqueous HCl (2×10 mL). The organic layer was dried (MgSO4), filtered, and concentrated under reduced pressure. The crude residue was dissolved in EtOH (20 mL) and heated under reflux conditions for 4 h. The mixture was cooled to rt and then concentrated under reduced pressure. The resulting oil was purified by flash column chromatography (PE/EA=1/4) to afford the title compound (600 mg, 38%) as a yellow oil. [M+H] Calc'd for C12H14O3, 207. Found, 207.

情報源と証拠