Cytotoxic phenylpropanoids and an additional thapsigargin analogue isolated from Thapsia garganica
作者:Huizhen Liu、Kent Gunnertoft Jensen、Linh My Tran、Ming Chen、Lin Zhai、Carl Erik Olsen、Helmer Søhoel、Samuel R. Denmeade、John T. Isaacs、S. Brøgger Christensen
DOI:10.1016/j.phytochem.2006.10.005
日期:2006.12
Four phenylpropanoids and a thapsigargin analogue have been isolated from the fruits of Thapsia garganica. A spectroscopic method for elucidating the relative stereochemistry at the two pairs of stereogenic centers in the phenylpropanoids has been developed. The phenylpropanoids were found to be potent cytotoxins. (c) 2006 Elsevier Ltd. All rights reserved.
Five phenylpropanoids have been isolated from the roots of Thapsia transtagana. Their structures have been elucidated by spectroscopic means. (c) 2006 Elsevier Ltd. All rights reserved.
The first total synthesis of neohelmanticins A–D, amino derivatives of the 1,2-dihydroxypropane core and biological evaluation
accomplished in 15 steps starting from commercially available gallic acid. Swern oxidation conditions, a Grignard reaction, Sharpless kinetic resolution, and regioselective ringopening of an epoxide with lithiumaluminumhydride (LAH) are the key features to install the basic core, dihydroxy phenyl propane 2. One hydroxyl group of this core was esterified with tiglic acid followed by the oxidation