作者:Lídia A. S. Cavaca、Catarina A. B. Rodrigues、Svilen P. Simeonov、Rafael F. A. Gomes、Jaime A. S. Coelho、Gustavo P. Romanelli、Angel G. Sathicq、José J. Martínez、Carlos A. M. Afonso
DOI:10.1002/cssc.201800980
日期:2018.7.20
The acid‐promoted methanolysis of oleuropein was studied using a variety of homogeneous and heterogeneous acid catalysts. Exclusive cleavage of the acetal bond between the glucoside and the monoterpene subunits or further hydrolysis of the hydroxytyrosol ester and subsequent intramolecular rearrangement were observed upon identification of the most efficient catalyst and experimental conditions. Furthermore
使用多种均相和非均相酸催化剂研究了橄榄苦苷的酸促进甲醇分解作用。在鉴定出最有效的催化剂和实验条件后,观察到了糖苷和单萜亚基之间的缩醛键的唯一切割或羟基酪醇酯的进一步水解和随后的分子内重排。此外,使用橄榄苦苷在连续流下并使用从橄榄叶中分批提取的粗混合物测试所选条件。在这项研究中还观察到了(-)-烯丙基甲基丙烯酸酯的形成,这是合成降压药(-)-ajmalicine的前体。