Asymmetric Total Synthesis of Caribenol A via an Intramolecular Diels–Alder Reaction
作者:Jing-Chun Han、Lian-Zhu Liu、Yuan-Yuan Chang、Guo-Zong Yue、Jie Guo、Li-Yan Zhou、Chuang-Chuang Li、Zhen Yang
DOI:10.1021/jo4006156
日期:2013.6.7
natural product with an intriguing tetracyclic framework, has been achieved. The synthesis features an intramolecularDiels–Alder (IMDA) reaction for the facile construction of the tricyclic [5–7–6] skeleton of caribenol A (1) and a biomimetic oxidation reaction for the formation of the 2-hydroxyfuran-2(5H)-one motif of caribenol A (1) as key steps. This synthetic approach also reveals that the sp2 carbon
Asymmetric, Protecting-Group-Free Total Synthesis of (+)-Caribenol A
作者:Jing-Chun Han、Lian-Zhu Liu、Chuang-Chuang Li、Zhen Yang
DOI:10.1002/asia.201300441
日期:2013.9
Caribenol Queen: A new asymmetric, protecting‐group‐freesynthesis of the marine tetracyclic diterpenoid (+)‐caribenol A (1) has been achieved. The enantioselective synthesis employed (S)‐methyl 1‐methyl‐2‐oxocyclopent‐3‐enecarboxylate as a chiral scaffold, and an intramolecular Diels–Alder (IMDA) reaction of substrate 3 afforded the [5.7.6] tricyclic core in compound 2.