Gallotannins and ellagitannins as regulators of cytokine release
申请人:The Penn State Research Foundation
公开号:US07288273B1
公开(公告)日:2007-10-30
A means and method for increasing or inhibiting the secretion of cytokines using gallotannins and ellagitannins is described. The preferred cytokine release inhibiting compounds are dimeric gallotannins having a linker molecule that misaligns the carbohydrate cores of the compounds. The preferred cytokine release promoting gallotannins and ellagitannins include a diaryl ether linker unit. In comparison to the more structurally complex ellagitannins, the compounds of this invention are structurally simpler, easier to synthesize, and more potent.
Ellagitannin Chemistry. Evolution of a Three-Component Coupling Strategy for the Synthesis of the Dimeric Ellagitannin Coriariin A and a Dimeric Gallotannin Analogue
作者:Ken S. Feldman、Michael D. Lawlor、Kiran Sahasrabudhe
DOI:10.1021/jo0010936
日期:2000.11.1
The total synthesis of the dimeric ellagitannin coriariin A is reported. The key reaction to access the dimeric framework was realized early in the synthesis pathway via a bis acylation reaction of a dehydrodigalloyl diacid with 2 equiv of a glucopyranose trichloroacetimidate. The glucose rings were subsequently functionalized, culminating in a double oxidative cyclization to form stereoselectively
Ellagitannin Chemistry. The First Total Synthesis of a Dimeric Ellagitannin, Coriariin A
作者:Ken S. Feldman、Michael D. Lawlor
DOI:10.1021/ja001013f
日期:2000.8.1
Ellagitannin Chemistry. Syntheses of Tellimagrandin II and a Dehydrodigalloyl Ether-Containing Dimeric Gallotannin Analogue of Coriariin A
作者:Ken S. Feldman、Kiran Sahasrabudhe
DOI:10.1021/jo9816966
日期:1999.1.1
The first chemical synthesis of the naturally occurring ellagitannin tellimagrandin II is reported. Key steps of the synthesis include the atropselective oxidative coupling of suitably protected galloyl rings at the O(4) and O(6) positions of a glucopyranose core, and the stereoselective acylation of the derived anomeric alcohol with a galloyl chloride. In addition, the synthesis of a novel gallotannin-ellagitannin