Morning glory-derived anticancer agents, and novel ipomoeassin compounds
申请人:Kingston G. I. David
公开号:US20060264383A1
公开(公告)日:2006-11-23
Ipomoeassin compounds derived from morning glory plant material (especially
Ipomoea
sp. from Suriname) are useful as anti-cancer agents. The novel compounds also are useful for treating neurodegenerative disorders (such as Alzheimer's disease) in human patients.
acid represents the key design element of a totalsynthesis of all known members of the ipomoeassin family of resin glyosides. This protecting group maneuver allows the unsaturated acids decorating the glucose subunit of the targets to be attached at an early phase of the synthesis, prevents their participation in the ruthenium‐catalyzed ring‐closing metathesis (RCM) used to form the macrocyclic ring,
Ipomoeassins A−E, Cytotoxic Macrocyclic Glycoresins from the Leaves of <i>Ipomoea </i><i>s</i><i>quamosa</i> from the Suriname Rainforest
作者:Shugeng Cao、Rebecca C. Guza、Jan H. Wisse、James S. Miller、Randy Evans、David G. I. Kingston
DOI:10.1021/np049629w
日期:2005.4.1
The new glycoresins, ipomoeassins A-E (1-5), have been isolated from the leaves of Ipomoea squamosa. The structures were elucidated by spectroscopic analyses and chemical transformations. The absolute configurations of C-5 (ipomoeassins 3-5) and C-11 (ipomoeassins 1 and 2) were determined by their derivatives with (R)- and (S)-MPA. All the isolates were active in the A2780 human ovarian cancer cell line assay, and 4 showed the highest activity with an IC50 value of 35 nM.