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.
Arene–Ruthenium Chemistry and Brønsted Acid Catalysis of a Chiral Phosphane-Hydroxyl Ligand
作者:Daniel Carmona、M. Pilar Lamata、Pilar Pardo、Ricardo Rodrı́guez、Fernando J. Lahoz、Pilar Garcı́a-Orduña、Ibon Alkorta、José Elguero、Luis A. Oro
DOI:10.1021/om401215m
日期:2014.2.10
The phosphane-hydroxyl ligand (S-C1,R-C2)-Ph2PC(Ph)HC(OH)HCH2OMe (POH) displays kappa P-1, kappa P-2,O, kappa P-3,O,O', and anionic deprotonated kappa P-3,O,O' coordination modes toward the metallic (eta(6)-p-MeC(6)H(4)iPr)Ru moiety. The hydroxyl group in [(eta(6)-p-MeC(6)H(4)iPr)Ru(kappa P-3,O,O'-POH)][SbF6](2) (3) has strong acidic properties. This complex catalyzes the Die Is Alder reaction between cyclopentadiene and trans-beta-nitrostyrene or. methacrolein as well as the Friedel Crafts reaction between indole and methyl 3,3,3,-trifluoropyruvate or trans-beta-nitrostyrene. Solution studies strongly indicate that complex 3 acts as a metallic Lewis acid assisted Bronsted-acid catalyst.