Hydrochloric Acid → HCID 11820489, compound

Participants

Reaction Steps

4-Hydroxy-2,5-dimethyl-3(2H)-furanone (1.0 g, TOKYO KASEI KOGYO CO., LTD.) and 4-dimethylaminopyridine (0.05 g) were dissolved in a mixture solution of pyridine (10 ml) and methylene chloride (10 ml) under an argon stream in a 50 ml two-necked flask. To the resulting solution, pivaloyl chloride (1.06 ml) was added dropwise under cooling with ice and the mixture was stirred at room temperature for 1 hour. Subsequently, the reaction mixture solution was mixed with a 0.5N ice-cooled aqueous solution of HCl (10 ml) and subjected to extraction with diethyl ether (30 ml). The ether-extraction was repeated 3 times. The ether layer was washed 3 times with a 0.5N aqueous solution of HCl, twice with a saturated aqueous solution of sodium bicarbonate and once with a saturated saline solution and dried over sodium sulfate. The ether layer was then concentrated under a reduced pressure and applied to a silica gel column for separation and purification. Thus, 2,5-dimethyl-4-pivaloyloxy-3(2H)-furanone (1.40 g) was obtained.

Provenance & Evidence