Hydrolyzable tannins with the hexahydroxydiphenoyl unit and the m-depsidic link:: HPLC-DAD-MS identification and model synthesis

被引：38

作者：

Arapitsas, Panagiotis

Menichetti, Stefano

Vincieri, Franco F.

Romani, Annalisa

机构：

[1] Univ Florence, Dipartimento Sci Farmaceut, Polo Sci & Tecnol, I-50019 Sesto Fiorentino, FI, Italy

[2] Univ Florence, Dipartimento Chim Organ Ugo Schiff, Polo Sci & Tecnol, I-50019 Sesto Fiorentino, FI, Italy

[3] Univ Florence, Lab Progettaz Sintesi, Polo Sci & Tecnol, HeteroBioLab, I-50019 Sesto Fiorentino, FI, Italy

[4] Univ Florence, Studio Eterocicli Bioatt, Polo Sci & Tecnol, HeteroBioLab, I-50019 Sesto Fiorentino, FI, Italy

来源：

JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY | 2007年 / 55卷 / 01期

关键词：

polyphenols; gallotannins; ellagitannins; tannic acid; berries;

D O I：

10.1021/jf0622329

中图分类号：

S [农业科学];

学科分类号：

09 ;

摘要：

This study was designed to develop efficient analytical tools for the difficult HPLC-DAD-MS identification of hydrolyzable tannins in natural tissue extracts. Throughout the study of the spectroscopic characteristics of properly synthesized stereodefined standards, it was observed that the UV-vis spectra of compounds with the m-depsidic link showed a characteristic shoulder at 300 nm, consistent with the simple glucogalloyl esters, whereas compounds with the hexahydroxydiphenoyl (HHDP) unit gave a diagnostic fragmentation pattern, caused by a spontaneous lactonization in the mass spectrometer. These observations were confirmed by HPLC-DAD-MS analyses of tannic acid and raspberry extracts, which are rich in hydrolyzable tannins with the m-depsidic link and the HHDP unit, respectively.

引用

页码：48 / 55

页数：8

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