开发了一种简单实用的由 SelectFluor® 试剂介导的3-硒基-苯并[ b ]呋喃合成方案。这种新颖的方法提供了一种在温和条件下通过无金属程序生成 3-取代-苯并[ b ]呋喃的更环保的替代方案。分子内环化反应采用通过 SelectFluor® 和有机二硒化物之间的反应原位产生的亲电硒物质进行。通过异核核磁共振波谱证实了这种亲电硒物质(RSe-F)的形成,并探讨了其反应性。
In this manuscript we described the FeCl3/diorganyl diselenides promoted intramolecular cyclization of o-alkynyl anilines, as an alternative for the construction of functionalized 3-organoselenyl indoles. The cyclization reactions proceeded smoothly at room temperature in the presence of air giving the 3-organoselenyl indoles in good yields. Additionally, the 3-organoselenyl indoles proved to be quite useful as synthetic intermediates for the construction of more functionalized indole units through a selenium-lithium exchange reaction followed by trapping the lithium intermediate with different electrophiles.