Palladium-catalyzed site-selective arylation of aliphatic ketones enabled by a transient ligand
作者:Lei Pan、Ke Yang、Guigen Li、Haibo Ge
DOI:10.1039/c8cc00980e
日期:——
Transition metal-catalyzed direct C–H bond functionalization enabled by transient ligands has become an attractive topic. Here we report a palladium-catalyzed site-selective arylation of β-C(sp3)–H bonds in aliphatic ketones with β-alanine as the transient ligand.
Synthesis of new derivatives of copper complexes of Josiphos family ligands for applications in asymmetric catalysis
作者:R. Oost、J. Rong、A. J. Minnaard、S. R. Harutyunyan
DOI:10.1039/c4cy00180j
日期:——
A series of new copper complexes containing chiral ferrocenyl diphosphine ligands of the Josiphos family have been prepared. These complexes have been studied in the catalytic asymmetric 1,2-addition of Grignard reagents to enones and aromatic ketones. Variation of the electronic and steric properties of the ligand resulted in a positive effect in the regio- and enantioselectivity of Grignard reagents
Copper-catalyzed enantioselective conjugate addition of Grignard reagents to acyclic enones using monodentate phosphoramidite ligands
作者:Beatriz Maciá、M. Ángeles Fernández-Ibáñez、Nataša Mršić、Adriaan J. Minnaard、Ben L. Feringa
DOI:10.1016/j.tetlet.2008.01.019
日期:2008.3
Herein, we report efficient catalysts based on phosphoramidites for the asymmetric copper-catalyzed conjugate addition of Grignard reagents to acyclic α,β-unsaturated ketones. A variety of Grignard reagents can be added to aliphatic and aromatic acyclicenones with good yields and moderate to good enantioselectivities.