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- W4303986156 abstract "Imidazolium ionic liquids containing second-generation MacMillan catalysts were synthesized and evaluated as organocatalysts (10 mol%) for enantioselective Friedel-Crafts reaction between N -benzylindole and crotonaldehyde using trifluoroacetic acid as a co-catalyst (10 mol%) at -60 °C, the corresponding product was obtained in 87% yield with 89% ee . The scope and limitation of organocatalyst were studied using substituted indoles and different α, β -unsaturated aldehydes, and enantioselective alkylated indoles were obtained in 43-95% yields with 58-90% ee’s . The second-generation modified MacMillan catalyst 6 was successfully recovered and reused up to four cycles and a significant drop in yields and ee was observed after the third recycle." @default.
- W4303986156 created "2022-10-10" @default.
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- W4303986156 date "2022-11-14" @default.
- W4303986156 modified "2023-10-16" @default.
- W4303986156 title "Enantioselective Friedel‐Crafts Alkylation of Indoles with <i>α, β</i> ‐Unsaturated Aldehydes Catalyzed by Recyclable Second‐generation MacMillan Catalysts" @default.
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- W4303986156 doi "https://doi.org/10.1002/ejoc.202200978" @default.
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