Divergent total syntheses of five illudalane sesquiterpenes and assignment of the absolute configuration
作者:Zhixiong Zeng、Yifan Zhao、Yandong Zhang
DOI:10.1039/c9cc00933g
日期:——
Concise, divergenttotalsyntheses of five bioactive illudalane sesquiterpenes have been achieved. Our synthesis features an intermolecular [2+2+2] cycloaddition, and a lactone-directed aromatic C–H oxygenation to generate a temporary phenolic hydroxyl group which enables regioselective methylation. Furthermore, the absolute configuration of radulactone was assigned by chemical synthesis.
The concise, divergenttotalsyntheses of four illudalane sesquiterpenes using an indanone as the key intermediate are reported. The key elements in these totalsyntheses, which involve only four to six operational steps, consist of a Suzuki cross-coupling and a one-pot Diels-Alder/oxidative aromatization reaction.
Collective Synthesis of Illudalane Sesquiterpenes via Cascade Inverse Electron Demand (4 + 2) Cycloadditions of Thiophene <i>S</i>,<i>S</i>-Dioxides
作者:Kun Ho Kenny Park、Nils Frank、Fernanda Duarte、Edward A. Anderson
DOI:10.1021/jacs.2c03304
日期:2022.6.8
dienophiles in this inverseelectrondemand Diels–Alder cascade, this concise and convergent approach enables the synthesis of these targets in as little as five steps. Theoretical studies rationalize the reactivity of thiophene S,S-dioxides with both electron-poor and electron-rich dienophiles and reveal reaction pathways involving either nonpolar pericyclic or bifurcating ambimodal cycloadditions. Overall,