A Facile Total Synthesis of
All Stereoisomers of Tarchonanthuslactone and Euscapholide from
Chiral Epichlorohydrin
作者:Hee-Yoon Lee、Vasu Sampath、Yeokwon Yoon
DOI:10.1055/s-0028-1087524
日期:——
A versatile and facile synthetic route to all the stereoisomers of tarchonanthuslactone and euscapholide was developed using epichlorohydrin as the source of all the chiral centers.
Total Synthesis of (+)-7-epi-Tarchonanthuslactone via a Chelation-Controlled Mukaiyama Aldol Reaction
作者:Shuangping Huang、Dongwang Liu、Linjun Tang、Fei Fei Huang、Jianting Zhang、Xiaoji Wang
DOI:10.1080/00397911.2015.1014498
日期:2015.5.19
Abstract An asymmetric total synthesis of (+)-7-epi-tarchonanthuslactone was achieved from commercially available methyl (R)-3-hydroxybutyrate. The key step employed a diastereoselective chelation-controlled Mukaiyama aldol reaction to construct the chiral hydroxyl group at the C-5 position. GRAPHICAL ABSTRACT
A Concise and Versatile Total Synthesis of All Stereoisomers of Tarchonanthuslactone
作者:Xiaoji Wang、Shuangping Huang、Dongwang Liu、Linjun Tang、Feifei Huang、Wei Yang
DOI:10.1055/s-0034-1378784
日期:——
We describe the versatile and concise total synthesis of all stereoisomers of tarchonanthuslactone from ( R )- or ( S )-3-hydroxybutyrate via eight steps. The key steps of the synthesis include a highly diastereoselective chelation-controlled Mukaiyama aldol reaction of a p -methoxybenzyl-protected aldehyde and a Yamaguchi lactonization of a δ-hydroxy- trans -α,β-unsaturated carboxylic acid.
我们描述了从 ( R )- 或 ( S )-3- 羟基丁酸酯通过八个步骤对所有 tarchonanthuslactone 立体异构体进行通用和简洁的全合成。合成的关键步骤包括高度非对映选择性螯合控制的对-甲氧基苄基保护醛的 Mukaiyama 羟醛反应和 δ-羟基-反式-α,β-不饱和羧酸的 Yamaguchi 内酯化。
Asymmetric synthesis of all the stereoisomers of tarchonanthuslactone
作者:S. Baktharaman、S. Selvakumar、Vinod K. Singh
DOI:10.1016/j.tetlet.2005.08.164
日期:2005.10
We describe herein an efficientsynthesis of all the four stereoisomers of tarchonanthuslactone from (R)-3-hydroxy butanoate, easily prepared from l-threonine. The approach involves the use of a β,γ-unsaturated δ-lactone as an intermediate, obtained via a Kulinkovich reaction followed by a ring-closing metathesis strategy.