A Highly Regioselective Synthesis of N-Acyl-2-acyl(aroyl)indolium Chloride through Palladium-Copper Catalysis Followed by Friedel–Crafts Reaction
作者:Md. Khan、Arifa Akther、Md. Alam
DOI:10.1055/s-0033-1340831
日期:——
2-Trimethylsilylethynyl acetanilides, obtained from the palladium-catalyzed reactions of 2-iodoacetanilides with trimethylsilylacetylene, underwent Friedel–Crafts acylation reactions yielding the N-acyl-2-acyl(aroyl)indolium chlorides in good yields.
A new protocol for the synthesis of 2-allylindole and 2-allylbenzofuran derivatives has been developed from readily accessible starting material, 2-((trimethylsilyl)ethynyl)arenes via Pd-catalysis. The presence of trimethylsilyl group in the alkyne is vital for this reaction. Stereoselectivity of 2-allylindole derivatives is controlled by the use of different nitrogen-protecting groups for 2-((tri