Divergent Syntheses of (-)-Chicanine, (+)-Fragransin A2, (+)-Galbelgin, (+)-Talaumidin, and (+)-Galbacin via One-Pot Homologative γ-Butyrolactonization
作者:Hosam Choi、Jongyeol Han、Joohee Choi、Kiyoun Lee
DOI:10.3390/molecules29030701
日期:——
In this study, the divergent syntheses of (-)-chicanine, (+)-fragransin A2, (+)-galbelgin, (+)-talaumidin, and (+)-galbacin are detailed. In this approach, an early-stage modified Kowalski one-carbon homologation reaction is utilized to construct the central γ-butyrolactone framework with the two necessary β,γ-vicinal stereogenic centers. The two common chiral γ-butyrolactone intermediates were designed
在本研究中,详细介绍了 (-)-chicanine、(+)-fragransin A2、(+)-galbelgin、(+)-talaumidin 和 (+)-galbacin 的不同合成。在该方法中,利用早期改良的Kowalski单碳同系反应来构建具有两个必要的β,γ-邻位立体中心的中心γ-丁内酯框架。两种常见的手性γ-丁内酯中间体被设计为能够通过市售材料以简洁有效的发散方式在五到八步内组装五种不同的光学活性四氢呋喃木脂素。这五种合成是迄今为止报道的最短且产率最高的合成。