Tannins and Related Compounds. XXXVIII.1) Isolation and Characterization of Flavan-3-ol Glucosides and Procyanidin Oligomers from Cassia Bark (Cinnamomum cassia Blume)

Satoshi Morimoto, Genichiro Nonaka, Itsuo Nishioka

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101 Citations (Scopus)

Abstract

A chemical examination of the bark of Cinnamomum cassia: Lauraceae) has led to the isolation of three flavan-3-ol glucosides (1—3) and three oligomeric procyanidins (4—6) named cinnamtannins A2-A4, together with (—) -epicatechin(7), procyanidins B-2 (8), B-5 (9) and C-l (11), and a doubly-linked proanthocyanidin (10). On the basis of chemical and spectroscopic evidence, compounds 1—3 were characterized as (—) -epicatechin 3-O-, 8-C- and 6-C-b-D-glucopyranosides, respectively, while compounds 4—6 were shown to be tetrameric, pentameric and hexameric procyanidins, respectively, consisting exclusively of (—) -epicatechin units linked linearly through C(4b)-C(8) bonds.

Original languageEnglish
Pages (from-to)633-642
Number of pages10
JournalChemical and Pharmaceutical Bulletin
Volume34
Issue number2
DOIs
Publication statusPublished - Jan 1 1986

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Drug Discovery

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