A strategy for the synthesis of the fargenone/fargenin family of natural products: synthesis of the tricyclic core
作者:Ross M. Denton、James T. Scragg
DOI:10.1039/c2ob25489a
日期:——
A synthesis of the core ring structure of the fargenin/fargenone family of naturalproducts is presented. The general strategy is based upon biosynthetic speculation and exploits a cascade reaction, which transforms a spirocyclic dienone into the core ring system via a deprotonation–oxy-Michael–Wittig olefination sequence. This study represents the first synthesis work towards this family of natural
efficient strategy for the first totalsynthesis of bi-magnolignan is reported. The bi-dibenzofuran skeleton was constructed via functional group interconversions of commercially available materials 1,2,4-trimethoxybenzene and 4-allylanisole. Then, the dibenzofuran skeleton was afforded by subsequent Suzuki coupling and intramolecular dehydration. The totalsynthesis of natural product was accomplished
A versatile synthetic route is reported towards the preparation of new analogues for potent neurotrophic agent biaryl-type lignan honokiol. A focused 24-membered library of derivatives containing five different groups at 5'-position of honokiol has been prepared in fair to good overall yields. Compared to the natural product, or to analogues with a short alkyl chain in this position, these new derivatives have lost most of the neurotrophic activity. (C) 2011 Elsevier Ltd. All rights reserved.
A concise synthesis of honokiol
作者:Ross M. Denton、James T. Scragg、Adrià M. Galofré、Xiechao Gui、William Lewis
DOI:10.1016/j.tet.2010.08.005
日期:2010.10
Two approaches to the synthesis of the plant-derived biaryl neolignan honokiol are described. The second approach provided the natural product in either four steps with 34% overall yield or five steps and 55% overall yield. (C) 2010 Elsevier Ltd. All rights reserved.