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    Author(s): L. Yeap Foo; Gerald W. McGraw; Richard W. Hemingway
    Date: 1983
    Source: Journal of The Chemical Society Chemical Communications 12:672-673
    Publication Series: Miscellaneous Publication
    PDF: Download Publication  (558 KB)


    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).

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    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

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