A biomimetic synthesis of shimalactone A and B is described. Its key features are an unprecedented acid-catalyzed cyclization of a dienyl beta-ketolactone and a Stille coupling/8pi-6pi electrocyclization cascade to create the oxabicyclo[2.2.1]heptane and bicyclo[4.2.0]octadiene, respectively. The synthesis is convergent and void of protecting groups.
描述了岛内酯A和B的仿生合成。它的主要特征是空前的二烯基β-酮内酯的酸催化环化和Stille偶联/ 8pi-6pi电环化级联反应,分别生成了氧杂
双环[2.2.1]庚烷和双环[4.2.0]
辛二烯。该合成是收敛的并且没有保护基团。