A Simple and Efficient One-Pot Synthesis of Substituted Benzo[b]furans by Sonogashira Coupling-5-endo-dig Cyclization Catalyzed by Palladium Nanoparticles in Water Under Ligand- and Copper-Free Aerobic Conditions
作者:Debasree Saha、Raju Dey、Brindaban C. Ranu
DOI:10.1002/ejoc.201000980
日期:2010.11
the synthesis of 2-substituted benzo[b]furan derivatives has been developed by the reaction of 2-iodophenols and arylacetylenes in water catalyzed by palladium nanoparticles generated in situ in open air. The reaction does not require any additive, ligand, or co-catalyst. The reaction occurs through Sonogashira coupling of 2-iodophenols with phenylacetylenes followed by 5-endo-dig cyclization. A series
通过在露天原位生成的钯纳米颗粒催化 2-碘苯酚和芳基乙炔在水中的反应,开发了一种简单有效的合成 2-取代苯并 [b] 呋喃衍生物的方法。该反应不需要任何添加剂、配体或助催化剂。该反应通过 2-碘苯酚与苯乙炔的 Sonogashira 偶联,然后进行 5-endo-dig 环化而发生。通过该程序以高产率获得了一系列官能化的苯并[b]呋喃衍生物。