Chiral Bis(oxazolidine)pyridine–Copper-Catalyzed Enantioselective Friedel–Crafts Alkylation of Indoles with Nitroalkenes
作者:Takayoshi Arai、Toru Sato
DOI:10.1055/s-0033-1340311
日期:——
asymmetric Friedel–Crafts reaction of indoles with nitroalkenes was catalyzed by the stereochemically tunable bis(oxazolidine)pyridine (PyBodine)–Cu(OTf)2 complex. Using the PyBodine(Val)–Cu(OTf)2 catalyst gave the Friedel–Crafts adducts with highly enantioselective manner. For the 1,4-bis[(E)-2-nitrovinyl]benzene, the reaction proceeded in a meso-trick manner to give the chiral double Friedel–Crafts adduct
A New Type of Bis(sulfonamide)-Diamine Ligand for a Cu(OTf)<sub>2</sub>-Catalyzed Asymmetric Friedel–Crafts Alkylation Reaction of Indoles with Nitroalkenes
作者:Jing Wu、Xincheng Li、Fan Wu、Boshun Wan
DOI:10.1021/ol201914r
日期:2011.9.16
Chiral bis(sulfonamide)-diamine served as new type of ligand for a Cu(OTf)2-catalyzed asymmetricFriedel–Craftsalkylation reaction of indoles with nitroalkenes. The desired products were obtained with up to 99% yield and 97% ee.