A selective synthesis of azulenes with an extended n-electron system by olefin and enyne cross-metathesis is described. Electron-enriched five-membered ring and electron-deficient seven-membered ring of the azulene moietyaffected the reaction yield.
描述了通过烯烃和烯炔交叉复分解反应选择性合成具有扩展 n 电子系统的甘菊烯。芘烯部分的富电子五元环和缺电子七元环影响反应产率。