AlCl<sub>3</sub>-Mediated Direct Carbon−Carbon Bond-Forming Reaction of α-Hydroxyketene-<i>S</i>,<i>S</i>-acetals with Arenes and Synthesis of 3,4-Disubstituted Dihydrocoumarin Derivatives
作者:Cheng-Ri Piao、Yu-Long Zhao、Xiao-Dan Han、Qun Liu
DOI:10.1021/jo702414y
日期:2008.3.1
α-hydroxyketene-S,S-acetals and various arenes via direct substitution of the hydroxy group in alcohols has been developed. On the basis of this C−C coupling reaction, a series of bio- and pharmacologically important 3,4-disubstituted dihydrocoumarins, difficult to obtain by other methods, were prepared in high yields by a sequential Friedel−Crafts alkylation and intramolecular annulation reaction of α-hydroxyketene