An efficient synthetic approach towards fully functionalized tetronic acids: the use of 1,3-dioxolane-2,4-diones as novel protected-activated synthons of α-hydroxy acids
作者:Kyriakos C. Prousis、John Markopoulos、Vickie Mckee、Olga Igglessi-Markopoulou
DOI:10.1016/j.tet.2015.09.017
日期:2015.11
A new strategy for the synthesis of tetronic acids with control over the regioselective introduction of substituents at the C-5 position has been developed. The construction of the densely functionalized quaternary carbon center within these molecules is of great importance. The key element for the proposed protocol was the utilization of O-carboxyanhydrides (OCA's) of optically active α-hydroxy acids
为的特窗酸与以上在C-5位区域选择性引入取代基的控制合成的新战略已经研制成功。这些分子中的官能密集季碳中心的建设是非常重要的。对于所提出的协议的关键因素是利用率ø -carboxyanhydrides(OCA的)的光学活性的α羟基酸,如二齿有为保护/活化前体。通过使用NMR光谱数据和X射线结构分析的新化合物的结构进行了研究。