A versatile, RCM based approach to eudesmane and dihydroagarofuran sesquiterpenoids from (−)-carvone: a formal synthesis of (−)-isocelorbicol
作者:R. Senthil Kumaran、Goverdhan Mehta
DOI:10.1016/j.tet.2015.01.039
日期:2015.3
enantiospecific and diversity oriented approach to a range of functionalized eudesmane, nor-, iso-, and dihydroagarofuran frameworks from (−)-carvone is delineated. The cornerstone of this approach is the installation of the quaternary carbon center through reductive opening of the carvone epoxide and setting-up of RCM reaction to generate the bicyclic eudesmane framework. Various options like carbocation
的对映体特异性和多样性导向的方法的一系列官能eudesmane,去甲,的异-从和dihydroagarofuran框架( - ) -香芹酮划定。这种方法的基石是通过还原香芹酮环氧化物和建立RCM反应生成双环Eudesmane骨架来安装季碳中心。为了桥接四氢呋喃部分的构建,已经探索了各种选择,例如碳正离子介导的氧环化和分子内羟基定向的环氧化物开放。在本研究过程中获得的几种杜鹃花和二氢呋喃呋喃中,其中一种先前已被精制为异抗坏血酸,因此构成了其正式合成。