Copper-catalyzed remote (δ) C(sp<sup>3</sup>)–H bond amination: a practical strategy to construct pyrrolidine derivatives
作者:Dongmei Meng、Yongzhen Tang、Junfa Wei、Xianying Shi、Mingyu Yang
DOI:10.1039/c7cc02624b
日期:——
We report a copper-catalyzed remote C(sp3)–H bond amination reaction that converts acyclic amines to pyrrolidines. This reaction occurs selectively at the carbon δ to the amine functionality. Primary, secondary and tertiary C–H bonds are all suitable for the amination reactions in the presence of an inexpensive and commercially available copper catalyst.
Comparative studies about the hydroamination of unactivatedalkenes and dienes catalyzed by either cationic gold(I) triphenyl phosphite complexes or silver salts were performed using sulfonamides, anilines and carbamates as nucleophiles. Gold-catalyzed reactions generally, need lower loadings than those carried out with silver salts. Simple alkenes react only with sulfonamides and weak aromatic amines
Mono- vs. Dinuclear Gold-Catalyzed Intermolecular Hydroamidation
作者:Juan M. Serrano-Becerra、Alexander F. G. Maier、Sandra González-Gallardo、Eric Moos、Christoph Kaub、Maximilian Gaffga、Gereon Niedner-Schatteburg、Peter W. Roesky、Frank Breher、Jan Paradies
DOI:10.1002/ejoc.201402068
日期:2014.7
Mono- and dinuclear gold catalysts were investigated in the intermolecularhydroamidation of olefins. Upon activation of [Ph3PAuCl] and [xantphos(AuCl)2] with various silver salts (AgOTf, Ag[BF4], and Ag[SbF6]), diverging reactivity of the resulting cationic gold complexes was observed. It was found that both the binding ability of the counterion and the solvent have a significant impact on the reactivity