Acid-promoted opening of 4,5- and 3,4-epoxy eudesmane scaffolds from α-isocostic acid
作者:Mohamed Zaki、Mohammed Tebbaa、Marie-Aude Hiebel、Ahmed Benharref、Mohamed Akssira、Sabine Berteina-Raboin
DOI:10.1016/j.tet.2014.12.061
日期:2015.4
The acid-catalyzed rearrangement of epoxide 3a and 8a derived from sesquiterpernic isocostic acid (1), the main component of Dittrichia viscosa, was studied using Lewis and Brönsted acids. Several new compounds were obtained with different selectivities depending on the catalyst used. These compounds were fully characterized by spectroscopic methods, and mechanistic explanations for their formation
环氧化物的酸催化的重排图3a和图8a从sesquiterpernic isocostic酸(派生1),其主要成分Dittrichia VISCOSA,使用路易斯和布朗斯台德酸进行了研究。根据所使用的催化剂,获得了几种具有不同选择性的新化合物。通过光谱方法对这些化合物进行了充分表征,并提出了有关其形成机理的解释。