Total synthesis of panaxydol and its stereoisomers as potential anticancer agents
摘要:
An efficient total synthesis of natural panaxydol la and its seven stereoisomers 1b-h was accomplished; four diastereomers of the natural form were prepared for the first time. Our strategy involves the Cadiot-Chodkiewicz cross-coupling reaction of chiral terminal alkynes with bromoalkynes, the asymmetric alkynylation of aldehydes, and the enantioselective Sharpless epoxidation of allylic alcohols. Preliminary in vitro cytotoxicity evaluation indicated that some synthetic panaxydols possess anticancer activities, and (3S,9R,10S)-panaxydol 1e showed a particularly promising cytotoxic effect. (C) 2015 Elsevier Ltd. All rights reserved.
New Polyacetylenes, DGAT Inhibitors from the Roots of<i>Panax ginseng</i>
作者:Lee, Seung Woong、Kim, Koanhoi、Rho, Mun-Chual、Chung, Mi Yeon、Kim, Young Ho、Lee, Sangku、Lee, Hyun Sun、Kim, Young Kook
DOI:10.1055/s-2004-815534
日期:2004.3
The petroleum ether extract of Panaxginseng showed a significant inhibition of the diacylglycerol acyltransferase (DGAT) enzyme from rat liver microsomes. Bioactivity-guided fractionation led to the isolation of two newpolyacetylenic compounds, (9 R,10 S)-epoxyheptadecan-4,6-diyn-3-one ( 1) and 1-methoxy-(9 R,10 S)-epoxyheptadecan-4,6-diyn-3-one ( 2). Their chemical structures were elucidated on
Total synthesis and absolute stereochemistry of (9R,10S)-epoxyheptadecan-4,6-diyn-3-one, a diacylglycerol acyltransferase inhibitor from Panax ginseng
作者:Jung-Hoon Oh、Hyun Sun Lee、Mun-Chual Rho、Young Kook Kim、Hyeong Kyu Lee、Woo Song Lee、Jae Nyoung Kim、Sangku Lee、Sang-Hun Jung
DOI:10.1016/j.tetlet.2004.07.153
日期:2004.9
Asymmetric synthesis of four possible stereoisomers of (9,10) -epoxyheptadecan-4,6-diyn-3-one was accomplished, and the absolute configuration of the naturally occurring (9R,10S)-epoxyheptadecan-4,6-diyn-3-one (1) was elucidated. (C) 2004 Elsevier Ltd. All rights reserved.