A new route towards the Asteriscanolide skeleton is described. The key features include an efficient intramolecular [2+2] photocycloaddition of the α,β-unsaturated acid-ether 10 followed by a Curtius rearrangement/ ruthenium tetroxide/ fragmentation sequence to yield the cyclooctane lactones 13 and 14.
描述了一条通往Asteriscanolide骨架的新途径。关键特征包括有效的α,β-不饱和酸醚10的分子内[2 + 2]光环加成反应,然后进行Curtius重排/
四氧化钌/裂解序列,得到
环辛烷内酯13和14。