Total Synthesis of Sandresolide B and Amphilectolide
作者:Ingrid T. Chen、Irina Baitinger、Lucas Schreyer、Dirk Trauner
DOI:10.1021/ol403156r
日期:2014.1.3
The total synthesis of the diterpenoids sandresolide B and amphilectolide from a common furan building block is presented. Key steps include palladium-mediated carbonylation, lanthanide catalyzed ring closure, Myers alkylation, intramolecular Friedel–Crafts acylation, photooxygenation, and a Kornblum–DeLaMare rearrangement.
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。