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Synthesis of 2,3-Disubstituted Indole Using Palladium(II)-Catalyzed Cyclization with Alkenylation Reaction
2002 Volume 50 Issue 2 Pages 235-238
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2002 Volume 50 Issue 2 Pages 235-238
The reaction of ethyl 2-ethynylphenylcarbamate derivative with alkenes in the presence of a palladium(II) catalyst, copper dichloride and tetrabutylammonium fluoride (TBAF) produced 2-substituted 3-ethenylindoles during refluxing. The intramolecular cyclization reaction of ethyl 2-ethynylphenylcarbamates, which have an ethenyl part in the ethynyl group, was also used to produce carbazole derivatives.
