First Asymmetric Synthesis of Orthoquinone Monoketal Enantiomers via Anodic Oxidation
- 28 October 2004
- journal article
- research article
- Published by American Chemical Society (ACS) in Organic Letters
- Vol. 6 (24) , 4571-4573
Abstract
An asymmetric synthesis of orthoquinone monoketals was accomplished using anodic oxidation to convert aryl methyl ethers bearing a chiral ethanol unit into orthoquinone bisketals, followed by monohydrolysis of their dimethyl ketal unit. All four possible stereoisomers were generated in a diastereoselective manner by varying the attachment point of the chiral pro-ketal alcoholic auxiliary to the starting arene. A preliminary screening of subsequent nucleophilic addition reactions confirmed the potential utility of these synthons in asymmetric synthesis.Keywords
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