Protecting-Group-Free Total Synthesis of (−)-Jiadifenolide: Development of a [4 + 1] Annulation toward Multisubstituted Tetrahydrofurans
作者:Yang Shen、Linbin Li、Zhisheng Pan、Yinglu Wang、Jundong Li、Kuangyu Wang、Xiance Wang、Youyu Zhang、Tianhui Hu、Yandong Zhang
DOI:10.1021/acs.orglett.5b02845
日期:2015.11.6
reported. The convergent route features a SmI2/H2O-mediated stereoselective reductive cyclization, an unprecedented formal [4 + 1] annulative tetrahydrofuran-forming reaction and programmed redox manipulations. The newly developed annulation of β-hydroxy aldehydes or ketones with lithium trimethylsilyldiazomethane provides access to a diverse array of multisubstituted tetrahydrofurans. The synthetic
( - ) -的简明,游离保护基团的全合成jiadifenolide,一个合成具有挑战性的开环-prezizaane倍半萜烯具有有效的神经营养活性,报道。收敛路线具有SmI 2 / H 2 O介导的立体选择性还原环化,前所未有的形式化[4 + 1]环四氢呋喃环化反应和程序化的氧化还原操作。新开发的β-羟基醛或酮与三甲基甲硅烷基重氮甲烷环化反应提供了使用多种多样的多取代四氢呋喃的途径。合成的jiadifenolide对五种人类癌细胞系表现出弱的细胞毒性。