A green and efficient method for regioselective O-acylation of polyphenols has been developed. The acylation can be carried out in potassiumcarbonate/dimethyl sulphoxide system by utilizing the ‘inherent nucleophile’ via an intermolecular cooperative transesterification under mild condition. This method shows particular advantage in regioselective acylation of polyphenols bearing 2′,4′-dihydroxyacetophenone
New polymer-supported phosphonate reagents for the synthesis of Z-α,β-unsaturated esters
作者:Kaori Ando、Yusaku Suzuki
DOI:10.1016/j.tetlet.2010.02.113
日期:2010.4
Newpolymer-supported phosphonate reagents have been prepared and evaluated for the synthesis of Z-α,β-unsaturated esters. High Z-selectivity was obtained using the reagent having two o-t-BuC6H4 groups.