Enantioselective Total Syntheses of Various Amphilectane and Serrulatane Diterpenoids via Cope Rearrangements
作者:Xuerong Yu、Fan Su、Chang Liu、Haosen Yuan、Shan Zhao、Zhiyao Zhou、Tianfei Quan、Tuoping Luo
DOI:10.1021/jacs.6b02624
日期:2016.5.18
was optimized to afford a precursor. The preparation of the chiral β-ketoester as a starting material was established via an optimized asymmetric 1,4-addition followed by trapping with Mander's reagent, and this initially installed stereogenic center provided good control in the subsequent introduction of all the other stereocenters. A rarely investigated one-pot conversion of α-pyrone into phenol was
Furans as Versatile Synthons: Total Syntheses of Caribenol A and Caribenol B
作者:Hong-Dong Hao、Dirk Trauner
DOI:10.1021/jacs.7b00234
日期:2017.3.22
caribenols A and B, were accessed from a common building block. Our synthesis of caribenol A features the diastereoselective formation of the seven-membered ring through a Friedel-Crafts triflation and a late-stage oxidation of a furan ring. The first synthesis of caribenol B was achieved using an intramolecular organocatalytic α-arylation. An unusual intramolecular aldol addition was developed for the
两种复杂的norditerpenoids,caribenols A和B,是从一个共同的构建块获得的。我们合成 caribenol A 的特点是通过 Friedel-Crafts 三氟甲磺酸反应和呋喃环的后期氧化非对映选择性地形成七元环。caribenol B 的首次合成是使用分子内有机催化 α-芳基化实现的。一种不寻常的分子内醛醇加成被开发用于组装其环戊烯酮部分,而具有挑战性的反式二醇部分是通过选择性亲核加成到羟基 1,2-二酮来安装的。我们的整体合成策略也导致了两性内酯的第二代合成,证实了呋喃作为强大的亲核试剂和多功能合成子的有用性。
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.
作者:Lian-Zhu Liu、Jin-Chun Han、Guo-Zong Yue、Chuang-Chuang Li、Zhen Yang
DOI:10.1021/ja106585n
日期:2010.10.6
A unified strategy toward the asymmetric total synthesis of carbenol A is reported, featuring intramolecular Diels-Alder (IMDA) and biomimetic oxidation reactions as key steps.
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