从金丝桃属植物 H. chinese L. var. 中分离。在 NMR 光谱分析的基础上,杨柳、biyouyanagin A 被指定为结构 1a 或 1b。这种新型天然产物表现出显着的抗 HIV 特性并抑制脂多糖诱导的细胞因子产生。本文描述了 biyouyanagin A 和几种类似物 (3-11) 的全合成、biyouyanagin A 到 2b 的结构修订,以及所有合成化合物的生物学特性。全合成通过级联序列进行,该序列有效地产生对映体纯的关键构建块 15b(ent-zingiberene)和 18(超内酯 C),并具有新颖的 [2 + 2] 光诱导环加成反应,该反应具有完全的区域和立体选择性。
Construction of Two Vicinal Quaternary Carbons by Asymmetric Allylic Alkylation: Total Synthesis of Hyperolactone C and (−)-Biyouyanagin A
作者:Chao Du、Liqi Li、Ying Li、Zhixiang Xie
DOI:10.1002/anie.200902908
日期:2009.10.5
Call on triple A: Palladium‐catalyzed asymmetric allylic alkylation (Pd‐AAA; see scheme) has enabled a concise and efficient synthesis of hyperolactoneC and (−)‐biyouyanagin A in only six (20 % overall yield) and seven (8 % overall yield) steps, respectively. The enantiomers of these natural products were also prepared by exploiting the same methodology.
Total Synthesis and Structural Revision of Biyouyanagin B
作者:K. C. Nicolaou、Silvano Sanchini、T. Robert Wu、David Sarlah
DOI:10.1002/chem.201001474
日期:——
An intriguing chase of the newly reported biyouyanagin B leads to its totalsynthesis and structuralrevision from 1′ to 1.
对新报道的 biyouyanagin B的有趣追逐导致其从1'到1 的全合成和结构修改。
Total Synthesis and Revised Structure of Biyouyanagin A
作者:K. C. Nicolaou、David Sarlah、David M. Shaw
DOI:10.1002/anie.200701552
日期:2007.6.18
Total Synthesis, Revised Structure, and Biological Evaluation of Biyouyanagin A and Analogues Thereof
作者:K. C. Nicolaou、T. Robert Wu、David Sarlah、David M. Shaw、Eric Rowcliffe、Dennis R. Burton
DOI:10.1021/ja802805c
日期:2008.8.1
compounds. The total synthesis proceeded through cascade sequences that efficiently produced enantiomerically pure key building blocks 15b (ent-zingiberene) and 18 (hyperolactoneC) and featured a novel [2 + 2] photoinduced cycloaddition reaction which occurred with complete regio- and stereoselectivity. Biological investigations with the synthesized biyouyangagins A (2-11) and hyperolactonesC (12-16) revealed
从金丝桃属植物 H. chinese L. var. 中分离。在 NMR 光谱分析的基础上,杨柳、biyouyanagin A 被指定为结构 1a 或 1b。这种新型天然产物表现出显着的抗 HIV 特性并抑制脂多糖诱导的细胞因子产生。本文描述了 biyouyanagin A 和几种类似物 (3-11) 的全合成、biyouyanagin A 到 2b 的结构修订,以及所有合成化合物的生物学特性。全合成通过级联序列进行,该序列有效地产生对映体纯的关键构建块 15b(ent-zingiberene)和 18(超内酯 C),并具有新颖的 [2 + 2] 光诱导环加成反应,该反应具有完全的区域和立体选择性。