C−H Activation of Phenyl Imines and 2-Phenylpyridines with [Cp*MCl<sub>2</sub>]<sub>2</sub> (M = Ir, Rh): Regioselectivity, Kinetics, and Mechanism
作者:Ling Li、William W. Brennessel、William D. Jones
DOI:10.1021/om9000742
日期:2009.6.22
activation mechanism. It was also found that the regioselectivity of the C−H activation was extremely sensitive to steric effects, with a meta methyl group leading to only one regioisomer. Solvent and temperature studies showed that the reaction rate can be increased both by increasing temperature and by using polar solvents such as methanol. The regioselectivity was solvent dependent for the reaction with
Rhodium‐Catalyzed Enantioselective Formal [4+1] Cyclization of Benzyl Alcohols and Benzaldimines: Facile Access to Silicon‐Stereogenic Heterocycles
作者:Bingxue Shen、Deng Pan、Wanying Xie、Xiao‐Xi Li、Songjie Yu、Genping Huang、Xingwei Li
DOI:10.1002/anie.202315230
日期:2024.1.2
A rhodium-catalyzedenantioselective formal [4+1] annulation of benzyl alcohols and benzaldimines with secondary silanes has been achieved in excellent enantioselectivity to afford a range of sila-O- and sila-N-heterocycles with silicon-stereogenic centers, where the rhodium catalyst plays a dual role in the O/N-Si and C-Si coupling.
Chiral Phosphoric Acid Catalyzed Asymmetric Addition of 2-(Vinyloxy)ethanol to Imines and Applications of the Products
作者:Xudong Wu、Xi Yuan、Haijun Yang、Hua Fu
DOI:10.1021/acs.orglett.9b01970
日期:2019.7.5
Chiral nitrogen-containing molecules such as chiral amines, azetidines, and 2-substituted tetrahydroquinolines are important privileged scaffolds in medicinal chemistry. In this paper, an efficient and highly enantioselective chiralphosphoricacidcatalyzed asymmetric addition of 2-(vinyloxy)ethanol to imines has been developed for the first time, providing the corresponding chiral amines containing
Reductive Umpolung of Carbonyl Derivatives with Visible-Light Photoredox Catalysis: Direct Access to Vicinal Diamines and Amino Alcohols via α-Amino Radicals and Ketyl Radicals
Visible-light-mediated photoredox-catalyzed aldimine-aniline and aldehyde-aniline couplings have been realized. The reductive single electron transfer (SET) umpolung of various carbonylderivatives enabled the generation of intermediary ketyl and α-amino radical anions, which were utilized for the synthesis of unsymmetrically substituted 1,2-diamines and amino alcohols.