Synthesis of digalactosyl diacylglycerols and their structure–inhibitory activity on human lanosterol synthase
作者:Rie Tanaka、Yuichi Sakano、Akito Nagatsu、Masaaki Shibuya、Yutaka Ebizuka、Yukihiro Goda
DOI:10.1016/j.bmcl.2004.10.013
日期:2005.1
Digalactosyl and monogalactocyl diacylglycerols (DGDG and MGDG), which were identified as anti-hyperlipemia active components in Colocasia esculenta (Taro), were synthesized. The inhibitory activity of DGDG, MGDG and related compounds on human lanosterol synthase was evaluated as anti-hyperlipemic activity. DGDG with two myristoyl groups at both sn-1 and sn-2 positions and with an oleoyl group at the sn-1 position showed the most potent activity. (C) 2004 Elsevier Ltd. All rights reserved.
Novel Galactolipids from the Leaves of Ipomoea batatas L.: Characterization by Liquid Chromatography Coupled with Electrospray Ionization–Quadrupole Time-of-Flight Tandem Mass Spectrometry
Sixteen novel and ten known galactolipids have been isolated and characterized from the leaves of Ipomoeabatatas L. (sweetpotato) using an analytical method based on high-performance liquid chromatography coupled with electrospray ionization-quadrupole time-of-flight tandem mass spectrometry. Using this technique, the structures and regiochemistries of the fatty acyl groups and the positions of the
diacylglycerols (DGDGs), which have both a galactose–galactose α(1→6)-linkage and a galactose–glycerol β-linkage along with a diacylglycerol containing various kinds of fatty acids, have been accomplished. In order to achieve a concise synthesis, we chose to use allylic protective groups as permanent protective groups. We have also achieved α- and β-selectiveglycosylations for the respective linkages with