Diastereoselective synthesis of spongian diterpenes. Total synthesis of the furanoditerpene (−)-spongia-13(16),14-diene
作者:Manuel Arnó、Miguel A González、Ramón J Zaragozá
DOI:10.1016/s0040-4020(99)00725-5
日期:1999.10
An effective diastereoselective synthesis of the marine-sponge metabolite (−)-spongia-13(16),14-diene 1 is achieved starting from S-(+)-carvone via a homochiral phenanthrenone as the key intermediate for the construction of the furan ring system. S-(+)-Carvone was transformed into the phenanthrenone 2a in six steps (53% overall yield), using an intramolecular Diels-Alder reaction as the key step. Conversion
有效的非对映选择性合成海洋海绵代谢物(-)-spongia-13(16),14-二烯1从S -(+)-香芹酮开始,通过高手性菲蒽酮作为呋喃构建的关键中间体铃声系统。以分子内狄尔斯-阿尔德反应为关键步骤,通过六个步骤(总产率为53%)将S -(+)-香芹酮转化为菲咯啉酮2a。将2a中的烯酮官能团转化为环氧乙醛官能团,然后在酸性条件下进行环化和芳构化,完成了D环的构建。