Nickel complexes of chiral spiroBox ligand catalyzed Friedel-Crafts alkylation reaction of indoles with nitroalkenes. Excellent yields (up to 99%) and enantiomeric excess (ee) values (up to 97%) were obtained with a broad scope of substrates. This catalytic system provides a facile synthesis of optically active 2-indolyl-1-nitro derivatives with high yield and enantioselectivity.
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| http://dx.doi.org/10.1039/d4ra08471c | DOI Listing |
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