Construction of Highly Functionalized Xanthones via Rh-Catalyzed Cascade C–H Activation/<i>O</i>-Annulation
作者:Sagar D. Nale、Debabrata Maiti、Yong Rok Lee
DOI:10.1021/acs.orglett.1c00391
日期:2021.4.2
facile and efficient strategy for obtaining functionalized and multihydroxylated xanthones via Rh catalysis under redox-neutral conditions is developed. Diverse salicylaldehydes bearing heterocycles, aromatics, and fused aromatics can be rapidly coupled with 1,4-benzoquinones or 1,4-hydroquinones to afford valuable xanthones via cascade C–H/O–H functionalization and annulation. This protocol provides a
开发了一种在氧化还原中性条件下通过Rh催化获得官能化的和多羟基化的氧杂蒽的简便有效的策略。带有杂环,芳族化合物和稠合芳族化合物的不同水杨醛可以与1,4-苯醌或1,4-氢醌快速偶联,通过级联的C–H / O–H功能化和环化反应提供有价值的氧杂蒽。该协议提供了一种通过后期功能化获得生物活性物质的快速合成方法,并可以制备天然产物,例如次烯脂烯酮,普尼弗洛酮N和鸦胆素。