678967-04-9Relevant articles and documents
Ceric Ammonium Sulfate (CAS) Mediated Oxidations of Benzophenones Possessing a Phenolic Substituent for the Synthesis of Xanthones and Related Products
Dam, Jean,Bode, Moira L.,De Koning, Charles B.
, p. 150 - 160 (2019/01/10)
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, 3H-spiro[benzofuran-2,1′-cyclohexa[2,5]diene]-3,4′-diones, and biaryl compounds. A comparison of these reactions with the more commonly used oxidant ceric ammonium nitrate (CAN) was also conducted. Based on these results, greater insight into the reaction mechanism has been gained. In addition, the conversion of the synthesized xanthen-2,9(4aH)-diones to xanthones by treatment with sodium dithionite is described.
Substituted tetraarylethylene compounds
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, (2008/06/13)
The present invention seeks to provide novel tetraarylethylene compounds which are substituted on the aryl rings ortho to the ethylenic carbon atoms and processes for the preparation for such compounds. The compounds have potential use as molecular templates.