Two Steps to Bicyclo[4.2.0]octadienes from Cyclooctatetraene: Total Synthesis of Kingianic Acid A
作者:Harshal D. Patel、Thomas Fallon
DOI:10.1021/acs.orglett.2c00325
日期:2022.4.1
the synthesis of linear tetraenes to initiate a biosynthetic 8π/6π-electrocyclization cascade. This work forges a functionalized bicyclo[4.2.0]octadiene in two steps from cyclooctatetraene. The versatility of this method is demonstrated through natural product synthesis, including the first totalsynthesis of kingianic acid A and formal syntheses of kingianins A, D, and F and cryptobeilic acid D ethyl
双环[4.2.0]辛二烯天然产物的合成方法经常使用线性四烯的合成来启动生物合成的8π/6π-电环化级联。这项工作从环辛四烯分两步锻造功能化的双环[4.2.0]辛二烯。该方法的多功能性通过天然产物合成得到证实,包括首次全合成金刚烷酸 A 以及金刚烷素 A、D 和 F 和隐贝酸 D 乙酯的正式合成。通过密度泛函理论建模使E、E、Z、E -四烯副产物的意外形成合理化。
A synthetic approach to kingianin A based on biosynthetic speculation
作者:Pallavi Sharma、Dougal J. Ritson、James Burnley、John E. Moses
DOI:10.1039/c1cc13949e
日期:——
A synthetic approach towards the structurally complex dimer, kingianin A is reported. The strategy involved a cascade of complexity generating reactions, inspired through biosynthetic speculation. A concise protecting group free synthesis of the proposed monomeric precursor pre-kingianin A has been achieved using a tandem Stille cross-coupling reaction and electrocyclisation process. However, preliminary studies of the key dimerisation reaction have been conducted, which indicate that the process is not spontaneous, raising questions as to the origin of this complex natural product.
作者:Samuel L. Drew、Andrew L. Lawrence、Michael S. Sherburn
DOI:10.1002/anie.201210084
日期:2013.4.8
A synthesis fit for a king: The totalsynthesis of (±)‐kingianins A, D, and F has been achieved in ten steps. Key features include the gram‐scale synthesis and partial reduction of a conjugated tetrayne to a (Z,Z,Z,Z)‐tetraene, the domino 8π–6π electrocyclic ring closure of a (Z,Z,Z,Z)‐tetraene, and the radical‐cation‐catalyzed formal Diels–Alder dimerization of functionalized bicyclo[4.2.0]octadiene