Ceric Ammonium Sulfate (CAS) Mediated Oxidations of Benzophenones Possessing a Phenolic Substituent for the Synthesis of Xanthones and Related Products
作者:Jean Dam、Moira L. Bode、Charles B. de Koning
DOI:10.1021/acs.joc.8b02503
日期:2019.1.4
Work previously published by our group described novel methodology for the synthesis of xanthones and related products from phenolic benzophenones in a reaction mediated by ceric ammonium sulfate (CAS). In this paper we further explore this novel reaction by subjecting an additional set of phenolic benzophenones to CAS to afford a range of compounds, including xanthones, 9H-xanthen-2,9(4aH)-diones
我们小组先前发表的工作描述了在硫酸铈铵(CAS)介导的反应中,从酚类二苯甲酮合成氧杂蒽酮和相关产物的新方法。在本文中,我们通过对另一组酚二苯甲酮进行CAS反应,以提供一系列化合物,包括x吨,9 H -xanthen-2,9(4a H)-二酮,3 H-螺[苯并呋喃],来进一步探索这一新颖的反应。-2,1'-环己[2,5]二烯] -3,4'-二酮和联芳基化合物。还对这些反应与更常用的氧化剂硝酸硝酸铈铵(CAN)进行了比较。基于这些结果,已经获得了对反应机理的更深入的了解。另外,合成的黄嘌呤-2,9(4a H描述了通过用连二亚硫酸钠处理生成二氧杂蒽的-二酮。
CAN-Mediated Oxidations for the Synthesis of Xanthones and Related Products
作者:Myron M. Johnson、Jeremy M. Naidoo、Manuel A. Fernandes、Edwin M. Mmutlane、Willem A. L. van Otterlo、Charles B. de Koning
DOI:10.1021/jo101873v
日期:2010.12.17
Reaction of (2,4,5-trimethoxyphenyl)(2-hydroxyphenyl)methanone with ceric ammonium nitrate furnished the xanthone, 2,3-dimethoxy-9H-xanthen-9-one. Under the same conditions the related (1,4-dimethoxynaphthalen-2-yl)(2-hydroxyphenyl)methanone resulted in the formation of 12a-methoxy-5H-benzo[c]xanthenes 5,7(12aH)-dione. Other examples of this novel transformation are also outlined.
(2,4,5-三甲氧基苯基)(2-羟苯基)甲酮与硝酸铈铵的反应提供了x吨酮2,3-二甲氧基-9 H-黄原-9-酮。在相同条件下,相关的(1,4-二甲氧基萘-2-基)(2-羟苯基)甲酮导致形成12a-甲氧基-5 H-苯并[ c ]黄嘌呤5,7(12a H)-二酮。还概述了此新颖转换的其他示例。