incorporate fluxional groups provide enhanced selectivity in asymmetric transformations? To address this issue, we have designed chiral 4‐dimethylaminopyridine (DMAP) catalysts with fluxional chirality. These catalysts were found to be efficient in promoting the acylative kineticresolution of secondary alcohols and axially chiral biaryl compounds with selectivityfactors of up to 37 and 51, respectively.
hydrogenolysis of aryl triflates through desymmetrization and kinetic resolution that allows the facile construction of axially chiral biaryl scaffolds with excellent results. These chiral compounds could be further converted into chiral monophosphine ligands, which were then used in asymmetric allylicalkylation to produce the desired product with high regio- and enantioselectivities.
Ihara, Hideki; Suginome, Michinori, Journal of the American Chemical Society, 2009, vol. 131, p. 7502 - 7503
作者:Ihara, Hideki、Suginome, Michinori
DOI:——
日期:——
Dynamic kinetic resolution of biaryl atropisomers by chiral dialkylaminopyridine catalysts
作者:Gaoyuan Ma、Chao Deng、Jun Deng、Mukund P. Sibi
DOI:10.1039/c8ob00384j
日期:——
The acylative dynamic kineticresolution (DKR) of configurationally unstable biaryl atropisomers is achieved by using newly developed chiral dialkylaminopyridine catalysts with fluxional chirality. Various types of biaryl substrates containing phenolic structures were subjected to the DKR to obtain a range of acylated biaryl products with enantiomeric ratios up to 90 : 10.
Dearomatization of Biaryls through Polarity Mismatched Radical Spirocyclization
作者:Carlos R. Azpilcueta‐Nicolas、Derek Meng、Simon Edelmann、Jean‐Philip Lumb
DOI:10.1002/anie.202215422
日期:2023.2
A redox-neutral dearomatization transforms biaryls into complex spirocycles commonly found in bioactive natural products. This polaritymismatchedradicalspirocyclization tolerates diverse functional groups and is applied in the regioselective synthesis of 2,4- and 2,5-cyclohexadienones. The first synthesis of denobilone A, a cytotoxic plant metabolite, showcases its utility to access underexplored