Trifluoroacetic Acid Catalyzed Cascade Reactions of 2,3‐Diketoesters with Cyclohexane‐1,3‐diones: Strategy Towards 4‐Hydroxybenzofuran Derivatives
作者:Qiang Sha、Haixuan Liu、Yuan Li
DOI:10.1002/adsc.201900056
日期:2019.4
An efficient trifluoroaceticacidcatalyzed cascade reaction of 2,3‐diketoesters with cyclohexane‐1,3‐diones is described for the synthesis of a series of 4‐hydroxybenzofurans. This simple protocol has the advantages of easy operation, readily available starting materials, good functional group tolerance, and easily scale‐up. Subsequent derivatization of the 4‐hydroxybenzofurans provides a reasonable