Totalsynthesis of (±)‐Englerin A has been achieved starting from γ,δ‐ynone 5 in 14 steps. The key feature of this synthesis is the highly efficient and stereoselective preparation of 8‐oxabicyclo[3.2.1]octane derivative 6, a core skeleton of Englerin A, based on an inverse electron‐demand [3+2] cycloaddition reaction of the platinum‐containing carbonylylide, which was developed in our laboratory
[EN] PROTEIN INHIBITOR OR DEGRADING AGENT, PHARMACEUTICAL COMPOSITION CONTAINING SAME AND PHARMACEUTICAL USE<br/>[FR] INHIBITEUR DE PROTÉINE OU AGENT DE DÉGRADATION, COMPOSITION PHARMACEUTIQUE LE CONTENANT ET UTILISATION PHARMACEUTIQUE<br/>[ZH] 蛋白抑制剂或降解剂、包含其的药物组合物及医药上的用途
Enantioselective Preparation of 8-Oxabicyclo[3.2.1]octane Derivatives via Asymmetric [3+2]-Cycloaddition of Platinum-Containing Carbonyl Ylides with Vinyl Ethers
作者:Kento Ishida、Hiroyuki Kusama、Nobuharu Iwasawa
DOI:10.1021/ja102391t
日期:2010.7.7
A catalytic asymmetric synthesis of 8-oxabicyclo[3.2.1]octane derivatives was achieved through the [3+2]-cycloaddition of the platinum-containing carbonyl ylides generated from acyclic gamma,delta-ynones on treatment with 10 mol % of PtCl(2)-Walphos and AgSbF(6). Synthetically useful 8-oxabicyclo[3.2.1]octane derivatives were obtained in good yields and mostly in over 90% ee's.