Efficient Synthesis of a Bisglycosyl Kaempferol from<i>Fagonia taeckholmiana</i>
作者:Qingchao Liu、Wenhong Li、Tiantian Guo、Dong Li、Zhen Fan、Suihong Yan
DOI:10.1246/cl.2011.324
日期:2011.3.5
The first total synthesis of kaempferol-3-O-β-l-arabinopyranosyl-(1→4)-α-l-rhamnopyranoside-7-O-α-l-rhamnopyranoside (1), a 3,7-triglycosylflavone, which was isolated from the aerial parts of Fagonia taeckholmiana, was accomplished in 13 steps and 9.2% overall yield from commercially available kaempferol. We efficiently employed phase-transfer-catalyzed (PTC) glycosylation for the construction of phenol glycosides. Applying this approach will allow the preparation of derivatives for further study of structure–activity relationships (SAR).
Synthesis of quercetin 3-O-(2′′-galloyl)-α-l-arabinopyranoside
作者:Ming Li、Xiuwen Han、Biao Yu
DOI:10.1016/s0040-4039(02)02139-1
日期:2002.12
Quercetin 3-O-(2′′-galloyl)-α-l-arabinopyranoside, a plant flavonol glycoside showing HIV-1 integrase inhibition, antibacterial, and antioxidant activities, was synthesized, with the glycosylation of the flavonol 3-OH being explored.
Twelve glycosides bearing the disaccharide of OSW-1, namely 2-O-(4-methoxybenzoyl)-beta -D-xylopyranosyl-(1 --> 3)-2-O-acetyl-alpha -L-arabinopyranosides, or its 1 --> 4-linked analogue, were synthesized, and their antitumor activities were determined. (C) 2000 Elsevier Science Ltd. All rights reserved.
Carbohydrate-Based NK1R Antagonists with Broad-Spectrum Anticancer Activity