开发了新型和有效的In(OTf)3催化的1,4-萘醌或苯醌与β-酮酰胺的级联式[3 + 2]环加成反应,以提供萘[1,2 - b ]呋喃-3-羧酰胺和苯并呋喃-3-羧酰胺。该方法具有广泛的底物范围,可以提供新颖且多样化的萘[1,2 - b ]呋喃-3-甲酰胺和苯并呋喃-3-甲酰胺,具有很高的区域选择性,并且产率高至优异。此外,预期该方法学可适用于带有萘并[1,2 - b ]呋喃-3-羧酰胺和苯并呋喃-3-羧苯甲酰胺的生物活性复合分子的合成。
Regioselective synthesis of novel and diverse naphtho[1,2-b]furan-3-carboxamides and benzofuran-3-carboxamides by cascade formal [3 + 2] cycloaddition
作者:Likai Xia、Yong Rok Lee
DOI:10.1039/c4ra07862d
日期:——
A novel and efficient In(OTf)3-catalyzed cascade formal [3 + 2] cycloaddition of 1,4-naphthoquinones or benzoquinones with β-ketoamides was developed to provide naphtho[1,2-b]furan-3-carboxamides and benzofuran-3-carboxamides. This methodology has broad substrate scope that can afford novel and diverse naphtho[1,2-b]furan-3-carboxamides and benzofuran-3-carboxamides with high regioselectivity in good
开发了新型和有效的In(OTf)3催化的1,4-萘醌或苯醌与β-酮酰胺的级联式[3 + 2]环加成反应,以提供萘[1,2 - b ]呋喃-3-羧酰胺和苯并呋喃-3-羧酰胺。该方法具有广泛的底物范围,可以提供新颖且多样化的萘[1,2 - b ]呋喃-3-甲酰胺和苯并呋喃-3-甲酰胺,具有很高的区域选择性,并且产率高至优异。此外,预期该方法学可适用于带有萘并[1,2 - b ]呋喃-3-羧酰胺和苯并呋喃-3-羧苯甲酰胺的生物活性复合分子的合成。