Highly Enantioselective Friedel−Crafts Alkylations of Indoles with Simple Enones Catalyzed by Zirconium(IV)−BINOL Complexes
作者:Gonzalo Blay、Isabel Fernández、José R. Pedro、Carlos Vila
DOI:10.1021/ol0710820
日期:2007.6.1
Complexes of BINOL-based ligands with Zr(OtBu)4 catalyze the Friedel-Craftsalkylation reaction of indoles and pyrrole with nonchelating beta-substituted alpha,beta-enones at room temperature affording the expected products with good yields and ee above 95% in most of the studied examples.
Nickel/Photoredox Dual-Catalyzed Conversion of Allyl Esters to Ketones via the Formal Deletion of Oxygen
作者:Ryoma Shimazumi、Riku Tanimoto、Mamoru Tobisu
DOI:10.1021/acs.orglett.3c02606
日期:2023.9.1
We report herein the catalytic conversion of allylic esters into the corresponding ketones by the formal deletion of an oxygen atom. The key to the success of the reaction is the dual use of nickel and photoredox catalysts; the former mediates C–O bond activation and C–C bond formation, while the latter is responsible for deoxygenation of the acyloxy group using PPh3 as a stoichiometric reductant.