A Unified Approach to the Daucane and Sphenolobane Bicyclo[5.3.0]decane Core: Enantioselective Total Syntheses of Daucene, Daucenal, Epoxydaucenal B, and 14-<i>para</i>-Anisoyloxydauc-4,8-diene
作者:Nathan B. Bennett、Brian M. Stoltz
DOI:10.1002/chem.201302353
日期:2013.12.23
enone intermediate enables the enantioselective total syntheses of daucene, daucenal, epoxydaucenal B, and 14‐para‐anisoyloxydauc‐4,8‐diene. Central aspects include a catalytic asymmetric alkylation followed by a ring contraction and ring‐closing metathesis to generate the five‐ and seven‐membered rings, respectively.
通过关键的烯酮中间体获得在胡萝卜烷和酚烷萜类化合物中发现的双环[5.3.0]癸烷核心,可以对映体选择性地全合成胡萝卜烯、胡萝卜烯醛、环氧胡萝卜醛B和14-对茴香酰氧基胡萝卜烯-4,8-二烯。核心方面包括催化不对称烷基化,然后进行环收缩和闭环复分解,分别生成五元环和七元环。