Oxabicyclo[3.2.1]octane Derivatives as Highly Reactive Dienophiles: Synthesis of Bicyclo[5.<i>n</i>.0] Systems
作者:Phillip Pelphrey、Jerry Jasinski、Ray J. Butcher、Dennis L. Wright
DOI:10.1021/ol047725i
日期:2005.2.1
homochiral oxabicyclo[3.2.1]octadiene buildingblocks for the synthesis of naturalproducts. We have found that these bridged alkenes undergo exceptionally facile Diels-Alder reactions and react faster than several well studied bicyclo[2.2.1]heptene dienophiles. The reaction proceeds with high levels of stereochemical control and in very good to excellent yields, providing access to bicyclo[5.4.0]undecane
Compounds of formula (I), wherein the substituents are as defined in claim
1
, and the agrochemically acceptable salts and all stereoisomers and tautomeric forms of the compounds of formula I are suitable for use as herbicides.
Synthetic and computational studies on liphagal: a natural product inhibitor of PI-3K
作者:Yanzhong Zhang、E. Zachary Oblak、Erin S.D. Bolstad、Amy C. Anderson、Jerry P. Jasinski、Ray J. Butcher、Dennis L. Wright
DOI:10.1016/j.tetlet.2010.09.058
日期:2010.11
The natural product liphagal has been shown to function as a reasonably potent and selective inhibitor of the key signaling enzyme PI-3K alpha. We have been interested in developing an analog class of PI-3K inhibitors based upon this unusual terpenoid natural product. Toward that end, we have evaluated the binding of the natural product to its target protein computationally and formulated a class of simplified analogs based on the structural analysis. Utilizing the cycloadduct derived from tetrabromocyclopropene and furan, we were able to generate a key, versatile scaffold upon which to pursue this analog design. (C) 2010 Elsevier Ltd. All rights reserved.