Acid-catalyzed rearrangements of flavans to novelbenzofuran derivatives

Richard W. Hemingway; Weiling Peng; Anthony H. Conner; Petrus J. Steynberg; Jan P. Steynberg

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Acid-catalyzed rearrangements of flavans to novelbenzofuran derivatives

Informally Refereed

Authors:

Richard W. Hemingway, Weiling Peng, Anthony H. Conner, Petrus J. Steynberg, Jan P. Steynberg

Year:

1998

Type:

Scientific Journal

Station:

Southern Research Station

Source:

olyphenols Communications 98; XIXth international conference on polyphenols; volume 1; 1998 September 1-4; Lille, France.Bordeaux Cedex, France: Groupe Polyphenols: 191-192.

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Abstract

The objective of this work was to define reactions that occur when proanthocyanidins and their derivatives are reacted in the presence of acid catalysts. Pure compounds (either as the free phenols, the methyl ether, or the methyl ether-acetate derivatives) were isolated by a variety of chromatographic methods. Proof of their structure was based mainly on 2D-NMR, as well as high-resolution MS and CD experiments. This publication summarizes some of the results of these experiments.

Citation

Hemingway, Richard W.; Peng, Weiling; Conner, Anthony H.; Steynberg, Petrus J.; Steynberg, Jan P. 1998. Acid-catalyzed rearrangements of flavans to novelbenzofuran derivatives. olyphenols Communications 98; XIXth international conference on polyphenols; volume 1; 1998 September 1-4; Lille, France.Bordeaux Cedex, France: Groupe Polyphenols: 191-192.