Cyclisation of 1,2-dioxines containing tethered hydroxyl and carboxylic acid functionality: synthesis of tetrahydrofurans and dihydrofuran-2(3H)-ones
作者:Ondrej Zvarec、Thomas D. Avery、Dennis K. Taylor、Edward R.T. Tiekink
DOI:10.1016/j.tet.2009.11.068
日期:2010.1
stereoselective manner and includes improved methods for previously reported carboxylic acid tether cyclisations. Additionally, improved methods for the oxidation of 1,2-dioxines containing tethered alcohols to furnish tethered carboxylic acids are also detailed. Subsequent reduction of the peroxide linkage enables the generation of functionalised tetrahydrofurans and dihydrofuran-2(3H)-ones, which are useful
在本文中,我们概述了将束缚的羟基和羧酸基团环化到1,2-二恶英的烯烃基序上,以生成四氢呋喃和二氢呋喃-2(3 H)-一,同时保持过氧化物键完好无损。这项工作证明了以高度立体选择性的方式将束缚的羟基基团分子内环化到生成功能化THF的1,2-二恶英上的第一个例子,并包括了先前报道的羧酸酯链环化的改进方法。另外,还详细描述了用于氧化含有1,2-二恶英的束缚的醇以提供束缚的羧酸的改进方法。随后过氧化物键的还原使得能够生成官能化的四氢呋喃和二氢呋喃-2(3 H)-,它们是用于构建天然产物的有用构建基块。