Condensed tannins: Preferential substitution at the interflavanoid bond by sulphite ion

L. Yeap Foo; Gerald W. McGraw; Richard W. Hemingway

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Condensed tannins: Preferential substitution at the interflavanoid bond by sulphite ion

Informally Refereed

Authors:

L. Yeap Foo, Gerald W. McGraw, Richard W. Hemingway

Year:

1983

Type:

Scientific Journal

Station:

Southern Research Station

Source:

Journal of The Chemical Society Chemical Communications 12:672-673

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Abstract

The reaction of loblolly pine (Pinus taeda L.) bark tannins with sodium hydrogen sulphite gave sodium epicatechin-(4β)-sulphonate(1) and sodium epicatechin-(4β→8)-epicatechin-(4β)-sulphonate(2) in high yield with only a minor amount of sodium 1-(3,4-dihydroxyphenyl)-2-hydroxy-3-(2,4,6-trihydroxyphenyl)-propane-1-sulphonate(3).

Citation

Foo, L. Yeap; McGraw, Gerald W.; Hemingway, Richard W. 1983. Condensed tannins: Preferential substitution at the interflavanoid bond by sulphite ion. Journal of The Chemical Society Chemical Communications 12:672-673