作者:Xiao-Long Wang、Yang-Yang Yang、Hui-Jun Chen、Yikang Wu、Dong-Sheng Ma
DOI:10.1016/j.tet.2014.04.090
日期:2014.7
Using epoxy chiral building blocks readily derived from d-gluconolactone as the source of the stereogenic centers, both (6R,8R)- and (6R,8S)-isomers of (E)-1-chlorotridec-1-ene-6,8-diol were synthesized. The vinylchloro unit was installed onto the substrate carbon chain in an approximately 9:1 (E)/(Z) ratio via a condensation of CrCl2/CHCl3 with a terminal aldehyde. A tosylation protocol featuring
使用容易衍生自d-葡萄糖酸内酯的环氧手性结构单元作为立体中心的来源,(E)-1-chlorotridec-1-ene的(6 R,8 R)-和(6 R,8 S)异构体合成了-6,8-二醇。通过CrCl 2 / CHCl 3与末端醛的缩合,将乙烯基氯单元以大约9:1(E)/(Z)的比例安装在底物碳链上。具有添加H 2的甲苯磺酸化方案还开发了O用于高极性四醇。合成产物允许重新获得质量更高的NMR光谱,并且揭示了通过合成获得的天然异构体在13 C NMR中存在一些微妙但不可忽略的差异,这些差异是大约30年前从海洋蓝藻中分离出来的。最终显示出令人困惑的差异是由羟基的氘化引起的。