Montmorillonite K-10 promoted synthesis of chiral dioxa-caged compounds derived from levoglucosenone
作者:Mariano A. Zurita、Aylén Avila、Rolando A. Spanevello、Alejandra G. Suárez、Ariel M. Sarotti
DOI:10.1016/j.carres.2014.07.019
日期:2015.1
A short and efficient methodology for the synthesis of chiral dioxa-caged compounds from levoglucosenone, a biomass-derived enone, is herein presented. The key transformation, that involves a cascade 3-step cationic cyclization, was efficiently carried out in high yields and selectivities by Montmorillonite K-10 catalysis. The usefulness of K-10 in related semi-pinacol rearrangements to obtain pyran-3-ones
本文提出了一种短而有效的方法,用于从左旋葡聚糖酮(一种生物质衍生的烯酮)合成手性二氧杂笼类化合物。通过蒙脱土K-10催化,可以高效,高选择性地进行涉及级联三步阳离子环化的关键转化。还显示了K-10在相关的半频哪醇重排中获得吡喃-3-酮的有用性。发现了差向异构醇的反应模式有趣的差异,并且这些发现的来源是通过DFT计算确定的。