Rhaponticin and its 3”-fluoroanalog have been prepared from easily accessible starting materials. The key step of these syntheses is the silver carbonate-mediated glycosidation reaction employed for the selective formation of a β -glycosidic bond. A palladium acetate-catalyzed Heck-Mizoroki reaction in triethanolamine established an (E) configuration in the stilbene with simultaneous deprotection of the carbohydrate.
胡薄荷次苷及其3”-
氟类似物已从易得的起始原料中制备得到。这些合成中的关键步骤是使用
碳酸银介导的糖苷化反应,用于选择性地形成β-糖苷键。在
三乙醇胺中通过
钯醋酸盐催化的Heck-Mizoroki反应,在同时去保护
糖类的情况下,建立了
芪类化合物的(E)构型。