Synthesis of (−)-Ilimaquinone via a Radical Decarboxylation and Quinone Addition Reaction
作者:Taotao Ling、Erwan Poupon、Erik J. Rueden、Emmanuel A. Theodorakis
DOI:10.1021/ol025501z
日期:2002.3.1
[reaction: see text] A stereoselective synthesis of (-)-ilimaquinone (4) is presented. The synthetic strategy is based on a novel radical decarboxylation and quinone addition methodology that produces quinone 7 from reaction of thiohydroxamic acid derivative 8 with benzoquinone (9). Final functionalization of 7 to ilimaquinone (4) is achieved by exploring the electronic effects of the residual thiopyridyl
focussed biological activities of this library were also investigated; quorumsensing activity of Vibrio harveyi was envisaged and some of the new compounds were shown to be good quorumsensing inhibitor candidates, whereas others were activators. Toxicities were also evaluated and some products showed micromolar activities against human umbilical vein endothelium, human hepatocellular carcinoma and human
Unified Synthesis of Quinone Sesquiterpenes Based on a Radical Decarboxylation and Quinone Addition Reaction
作者:Taotao Ling、Erwan Poupon、Erik J. Rueden、Sun H. Kim、Emmanuel A. Theodorakis
DOI:10.1021/ja027517q
日期:2002.10.1
several quinone sesquiterpenes is described herein. Essential to this strategy is a novel radical additionreaction that permits the attachment of a fully substituted bicyclic core 16 to a variably substitutedquinone 10. The addition product 15 can be further functionalized, giving access to natural products with a high degree of oxygenation at the quinone unit. The quinoneadditionreaction is characterized
Synthetic and stereochemical studies related to -clerodane diterpenoids and congeners
作者:Aluru S. Sarma、Ashok K. Gayen
DOI:10.1016/s0040-4039(00)86277-2
日期:1983.1
which is also a degradation product of ilimaquinone, is described. In view of a discrepancy in our earlier work on correlation of the stereochemistry of ketoester (5), with that of avarol, the present studies have also been useful in re-establishing our previous conclusions.