A Concise Asymmetric Synthesis of (-)-Virolin, (-)-Surinamensin, (-)-Raphidecursinol B and (-)-Polysphorin
作者:Bhimrao Gawali、Manda Nagaraju、Rajesh Chandra
DOI:10.1055/s-0031-1290678
日期:2012.6
Highly concise and general asymmetric syntheses of biologically important natural (–)-8,4′-oxyneolignans [(–)-virolin, (–)-surinamensin, (–)-raphidecursinol B, and (–)-polysphorin] are reported. The key step in the synthesis is the Evan’s syn-aldol reaction to achieve the adducts with the desired stereochemistry. The four biologically important plant metabolites were synthesized using two common intermediates
报道了具有生物学重要性的天然 (-)-8,4'-氧化木脂素 [(-)-virolin、(-)-surinamensin、(-)-raphidecursinol B 和 (-)-polysphorin] 的高度简洁和通用的不对称合成。合成中的关键步骤是 Evan 的合成羟醛反应,以实现具有所需立体化学的加合物。四种生物学上重要的植物代谢物是使用两种常见的中间体合成的。
Asymmetric synthesis and anti-protozoal activity of the 8,4′-oxyneolignans virolin, surinamensin and analogues
作者:Claire E. Rye、David Barker
DOI:10.1016/j.ejmech.2012.12.013
日期:2013.2
The asymmetric synthesis of 8,4′-oxyneolignans (−)-virolin, (−)-surinamensin and a number of analogues has been achieved. A divergent synthesis was used, with all compounds being elaborated from a single chiral aldehyde derived from ethyl lactate. In the 15 compounds that were tested, the level of substitution on the A-ring was found to directly influence the activity against Leishmania donovani whilst