Tannins and related compounds. Part 13. Isolation and structures of trimeric, tetrameric, and pentameric proanthicyanidins from cinnamon

Gen Ichiro Nonaka, Satoshi Morimoto, Itsuo Nishioka

研究成果: Contribution to journalArticle査読

92 被引用数 (Scopus)

抄録

A proanthocyanidin trimer, two tetramers, and a pentamer have been isolated in their free phenolic forms from cinnamon, the bark of Cinnamomum zeylanicum (Lauraceae). Partial acid-catalysed degradation of these tannins with phenylmethanethiol, in conjunction with 1H- and 13C-n.m.r. analysis, has unequivocally established their structures as epicatechin-(4β→8, 2β→7)epicatechin-(4α→8)- epicatechin (5); epicatechin-(4β→8)epicatechin-(4β→8, 2β→7)-epicatechin-(4α→8)-epicatechin (6); epicatechin-(4β→6)-epicatechin-(4β→8, 2β→7)- epicatechin-(4α→8)-epicatechin (7); and epicatechin-(4β→8)- epicatechin-(4β→8)epicatechin-(4β-→8, 2β→7)- epicatechin-(4α→8)-epicatechin (8).

本文言語英語
ページ(範囲)2139-2145
ページ数7
ジャーナルJournal of the Chemical Society, Perkin Transactions 1
DOI
出版ステータス出版済み - 1 1 1983

All Science Journal Classification (ASJC) codes

  • 化学 (全般)

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