Palladium — Catalyzed Reactions, 1 Palladium‐Catalyzed Enantioselective Hydrophenylation and Hydrohetarylation of Bicyclo[2.2.1]Hept‐2‐ene: Influence of the Chiral Ligand, the Leaving Group, and the Solvent
作者:Jan Christoph Namyslo、Dieter E. Kaufmann
DOI:10.1002/cber.19971300924
日期:1997.9
henylphosphane 7 as ligands in the Pd-catalyzed Heck-type hydroarylation of norbornene (1) with phenyl 2 and various hetaryl derivaties 3–5 leads exclusively to the formation of exo-2(het)arylnorbornanes 6 with asymmetric inductions of up to 86.4% ee. In addition to an investigation into the effects of different chiralligands, a systematic study has been made of the influence of various (het)aryl
Anti-Markovnikov Hydroarylation of Unactivated Olefins via Pyridyl Radical Intermediates
作者:Allyson J. Boyington、Martin-Louis Y. Riu、Nathan T. Jui
DOI:10.1021/jacs.7b03262
日期:2017.5.17
The intermolecular alkylation of pyridine units with simple alkenes has been achieved via a photoredox radical mechanism. This process occurs with complete regiocontrol, where single-electron reduction of halogenated pyridines regiospecifically yields the corresponding radicals in a programmed fashion, and radical addition to alkene substrates occurs with exclusive anti-Markovnikov selectivity. This