A new design for the synthesis of the 25-membered tris-oxazole macrolide core, 3, in the "ulapualide family" of marine natural products e.g. 1 isolated from nudibranchs and sponges, based on a macrolactamisation strategy, leading to 4, followed by oxazoline and oxazole ring formation using the substituted monooxazoles 5 and 6 as key precursor, is described.
描述了一种新的设计用于合成25元三
噁唑大环核3,这属于“乌拉普亚利德家族”的海洋
天然产物,例如从海兔和海绵中分离出的1。该方法基于大环内酰胺化策略,生成4,随后使用取代的单
噁唑5和6作为关键前体形成
噁唑啉和
噁唑环。