Acetic Anhydride → HCID 54335119, compound

Participants

Reaction Steps

A liquid mixture of 13.75 g of the 2'-hydroxy-4,4',6'-tris(methoxymethoxy)-3'-(3-methyl-2-butenyl)chalcone, 40 ml of acetic anhydride and 40 ml of anhydrous pyridine was stirred at room temperature to effect a reaction. Then, the reaction mixture was added into 200 ml of a cooled saturated solution of sodium hydrogencarbonate and the mixture was stirred at 0° C. for 30 minutes. The mixture was extracted with 1500 ml of ether, and the ether layer was washed with water, shaken with a saturated aqueous solution of copper sulfate, washed with water, shaken with a saturated aqueous solution of sodium chloride, dried with anhydrous sodium sulfate and filtered. The solvent was removed from the filtrate by distillation, and the residue was subjected to the silica gel column chromatography (300 g of 230-400 mesh silica gel, n-hexane/ethyl acetate=4/1, 0.3 kg/cm2). Fractions of 100 ml were collected and the 35th to 37th fractions were combined to obtain 12.58 g (yield=84.0%) of 2'-acetoxy-4,4',6'-tris(methoxymethoxy)-3'-(3-methyl-2-butenyl)chalcone in the form of a yellow oil.

Provenance & Evidence