Synthesis of polyhydroxylated xanthones via acyl radical cyclizations
摘要:
2-Formylphenoxy quinones can be converted into xanthones via an acyl radical intermediate with NBS and AIBN. (C) 2011 Elsevier Ltd. All rights reserved.
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