Acetic Anhydride → 2-Acetoxymethyl-5-methyl-2,3,6,7-tetrahydrofuro-[2,3-f]quinoline-7-one

참여 물질

반응 단계

To a solution of 2-hydroxymethyl-5-methyl-2,3,6,7-tetrahydrofuro[2,3-f]quinoline-7-one (261 mg) in anhydrous pyridine (7 ml), acetic anhydride (233 mg) was added. The mixture was stirred at room temperature for 1 hour, and further stirred at 50° C. for 1 hour. After completion of the reaction, the solvent was distilled off, and the residue was dissolved in chloroform, and washed with water. After drying, the solvent was distilled off to obtain 305 mg of a crude product. The crude product was purified by silica gel column chromatography (eluent=chloroform:methanol=70:1) to obtain 247 mg of a target product (80.0%). The product was recrystallized from chloroform-n-hexane, and as a result, colorless powdery crystals were obtained (mp. 197°-200° C.).

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