Obtention of Anthraquinones by Selective Oxidation of the Corresponding Anthracenes and 9,10-Dimethoxyanthracenes with Copper or Zinc Nitrate supported on Silica Gel
Efficient Synthesis of<i>peri</i>-Hydroxylated 9,10-Anthracenedione Ethers via Alkylation of Cesium Phenolates
作者:R. Thomas Winters、Anthony D. Sercel、H. D. Hollis Showalter
DOI:10.1055/s-1988-27682
日期:——
A comparison of the reaction of the potassium and cesium phenolates of a series of peri-hydroxylated 9,10-anthracenediones with a range of alkylating agents is described. Cesium phenolates promote accelerated reaction rates, give higher product yields, and provide for the introduction of a wider range of alkyl groups.
yields by zinc in refluxing acetic acid. Under similar conditions, ethyl I'-anthracenoxyacetate (3i) with the ester group unaffected and 1,8-oxybis(ethyleneoxyethyleneoxy)anthracene (5) were also conveniently synthesized in 65 and 70% yields, respectively.
Obtention of Anthraquinones by Selective Oxidation of the Corresponding Anthracenes and 9,10-Dimethoxyanthracenes with Copper or Zinc Nitrate supported on Silica Gel
作者:Mario Anastasia、Pietro Allevi、Cristina Bettini、Alberto Fiecchi、Anna Maria Sanvito
DOI:10.1055/s-1990-27101
日期:——
Anthracene, 9,10-dimethoxyanthracene and substituted analogues are selectively oxidized to the corresponding anthraquinones in good yields by copper(II) or zinc(II) nitrate supported on silica gel; the ether groups at different position from 9 and 10 are unaffected.