The marine sesquiterpene (±)-dactylol was prepared from 2,5-dimethyl-7-(3-methyl-4-pentenyl)tropone in six steps. Salient features of the synthesis include: (1) a stereo- and regioselective intramolecular tropone-alkene [6π+2π] photocyclization to furnish the dactylol carbocyclic skeleton, (2) a regioselective Baeyer-Villiger oxidation of a bisneopentyl ketone, and (3) a chemoselective 1,4-reduction
海洋
倍半萜 (±)-dactylol 由 2,5-二甲基-7-(3-甲基-4-
戊烯基) 托酮分六个步骤制备。该合成的显着特征包括:(1)立体和区域选择性的分子内特罗酮-烯烃 [6π+2π] 光环化以提供指醇碳环骨架,(2)双新
戊基酮的区域选择性 Baeyer-Villiger 氧化,以及(3) Cyclocta-1,3-二烯部分的
化学选择性 1,4-还原