报道了(+)-和(-)-clusianone以及(+)-和(-)-clusianone甲基烯醇醚的完全不对称合成。不对称诱导是通过使用 ACC 烷基化实现的,提供了 er 为 99:1 的关键中间体。对四种合成化合物的抗 HIV 活性进行了评估。(+)-和(-)-clusianone均表现出显着的抗HIV活性。
Development of a Strategy for the Asymmetric Synthesis of Polycyclic Polyprenylated Acylphloroglucinols via <i>N</i>-Amino Cyclic Carbamate Hydrazones: Application to the Total Synthesis of (+)-Clusianone
作者:Michelle R. Garnsey、Daniel Lim、Julianne M. Yost、Don M. Coltart
DOI:10.1021/ol1022728
日期:2010.11.19
A broadly applicable asymmetric synthetic strategy utilizing N-amino cyclic carbamate alkylation that provides access to the various stereochemical permutations of a common structural motif found in many polycyclic polyprenylated acylphloroglucinols is described. The utility of this methodology is demonstrated through the first asymmetric total synthesis of the antiviralagent (+)-clusianone.
α,α‘-Annulation of 2,6-Prenyl-Substituted Cyclohexanone Derivatives with Malonyl Chloride: Application to a Short Synthesis of (±)-Clusianone. Formation and Rearrangement of a Biogenetic-Like Intermediate
were found for the successful Effenberger alpha,alpha'-annulation of 3,3-dimethyl-2,4,6-triprenyl cyclohexanone silyl enol ethers with malonyl chloride to give the corresponding bicyclo[3.3.1]nonane-trione in 35% yield, this result allowing a short synthesis of (+/-)-clusianone. An isomeric rearranged bicyclo[3.3.1]nonane-trione was also isolated in 25% yield, and changing the Lewis acid resulted in
Synthesis of (+/−)-Clusianone: High-Yielding Bridgehead and Diketone Substitutions by Regioselective Lithiation of Enol Ether Derivatives of Bicyclo[3.3.1]nonane-2,4,9-triones
作者:Vincent Rodeschini、Nadia M. Ahmad、Nigel S. Simpkins
DOI:10.1021/ol0620592
日期:2006.11.9
[Structure: see text] A concise synthesis of the polyprenylated acylphloroglucinol natural product, clusianone, in racemic form, is described. An Effenburger cyclization generated a core bicyclo[3.3.1]nonane-trione structure, which was then elaborated by means of regioselective lithiation reactions.