Synthesis of Indenes by the Palladium-Catalyzed Carboannulation of Internal Alkynes
摘要:
[GRAPHICS]A number of highly substituted indenes have been prepared in good yields by treating functionally substituted aryl halides with various internal alkynes in the presence of a palladium catalyst. The reaction is believed to proceed by regioselective arylpalladation of the alkyne and subsequent nucleophilic displacement of the palladium in the resulting vinylpalladium intermediate.
Synthesis of Indenes by the Transition Metal-Mediated Carboannulation of Alkynes
作者:Daohua Zhang、Zhijian Liu、Eul K. Yum、Richard C. Larock
DOI:10.1021/jo0620563
日期:2007.1.1
The synthesis of highly substituted indenes has been achieved by three different transition metal-mediated methods. The first method involves the palladium-catalyzed carboannulation of internalalkynes. The second method utilizes a two-step approach, which involves first the palladium/copper-catalyzed cross-coupling of terminalalkynes with appropriately functionalized aryl halides, followed by copper-catalyzed