Synthesis of di- and poly-substituted phenols via [4 + 2] type cyclo-condensation
作者:Ming-Zhe Shao、Xiao-Yu Liu、Fang-Qing Li、Zili Chen
DOI:10.1016/j.tetlet.2021.153031
日期:2021.5
A new [4 + 2] type cyclocondensation was developed to prepare 3,5- and poly-substituted phenols using aryl ketoesters and ynones as the starting materials; Various substrates, such as aryl-, heteroaryl ketoesters and aryl-, vinyl-, alkyl substituted ynones, were employed. In addition, extending the substrate scope to benzoyl acetone provided 3,4,5-trisubstituted phenols.
开发了一种新的[4 + 2]型环缩合反应,以芳基酮酸酯和ynones为起始原料制备3,5-和多取代的苯酚。使用了各种底物,例如芳基-,杂芳基酮酸酯和芳基-,乙烯基-,烷基取代的炔酮。另外,将底物范围扩展至苯甲酰基丙酮,提供了3,4,5-三取代的苯酚。