Synthesis of functionalized 3-aryl-3<i>H</i>-benzofuranone derivatives from aryl acetate <i>via</i> [3 + 2] annulation of 1,4-dihydroxy-2-naphthoic acid ester
作者:Huan Wang、Yuxiang Zhou、Ying Xie、Yi Liu、Yulong Li、Hao Zhang、Jilang Long
DOI:10.1039/d2ob02319a
日期:——
A novel [3 + 2] cascade reaction of aryl acetate with 1,4-dihydroxy-2-naphthoic acidester by cooperative catalysis of isothiourea and vanadium is developed. The key step of the reaction is that the C1-ammonium enolates generated from aryl acetate will cycloadduct to 1,4-naphthoquinone intermediates. 3-Aryl-3H-benzofuranone derivatives can be prepared in medium to good yields under mild conditions