Publications de Peng Ren | EPFL Graph Search

Nickel-Catalyzed Direct Alkylation of Terminal Alkynes at Room Temperature: A Hemilabile Pincer Ligand Enhances Catalytic Activity

Rosario Scopelliti, Xile Hu, Peng Ren, Pablo Marcelo Perez Garcia

Direct coupling of alkyl halides with terminal alkynes provides an efficient and streamlined access to alkyl-substituted alkynes, which are important synthetic intermediates, biologically active molecules, and organic materials. However, until now,there ha ...

American Chemical Society2015

Mild and Phosphine-Free Iron-Catalyzed Cross-Coupling of Nonactivated Secondary Alkyl Halides with Alkynyl Grignard Reagents

Xile Hu, Chi Wai Cheung, Peng Ren

A simple protocol for iron-catalyzed cross-coupling of nonactivated secondary alkyl bromides and iodides with alkynyl Grignard reagents at room temperature has been developed. A wide range of secondary alkyl halides and terminal alkynes are tolerated to af ...

American Chemical Society2014

Nickel-catalyzed diastereoselective alkyl-alkyl Kumada coupling

Xile Hu, Peng Ren, Thomas Clément Di Franco, Pablo Marcelo Perez Garcia, Alessio Orsino

A nickel pincer complex is found to catalyze alkyl–alkyl Kumada coupling reactions of 1,3- and 1,4-substituted cyclohexyl halides and tetrahydropyrans with an excellent diastereoselectivity. The mechanistic investigation of the coupling reactions provides ...

American Chemical Society2012

Copper-catalyzed cross coupling of functionalized alkyl halides and tosylates with secondary and tertiary alkyl Grignard reagents

Xile Hu, Lucas-Alexandre Stern, Peng Ren

A copper-based method is highly efficient for the cross-coupling of alkyl electrophiles with secondary and tertiary alkyl Grignard reagents. The method is distinguished by its broad substrate scope and high functional group tolerance. ...

Wiley-VCH Verlag GmbH2012

Copper-Catalyzed Alkylation of Benzoxazoles with Secondary Alkyl Halides

Rosario Scopelliti, Xile Hu, Peng Ren, Isuf Salihu

Copper-catalyzed direct alkylation of benzoxazoles using nonactivated secondary alkyl halides has been developed. The best catalyst is a new copper(I) complex (1), and the reactions are promoted by bis[2-(N,N-dimethylamino)ethyl] ether. ...

American Chemical Society2012

Synthesis and electronic properties of a pentafluoroethyl-derivatized nickel pincer complex

Xile Hu, Oleg Vechorkin, Peng Ren

The synthesis of a bis(amino)amide nickel pincer complex bearing a perfluoroethyl ligand was effected by reaction of the corresponding nickel chloride complex with cesium fluoride and trimethyl(pentafluoroethyl)silane. Electrochemical experiments revealed ...

Royal Society of Chemistry2012

Creating Tertiary and Quaternary Carbon Centers by Nickel and Copper-Catalyzed Cross-Coupling Reactions of Alkyl Electrophiles

Peng Ren

Transition-metal-catalyzed C-C coupling reactions have been extensively studied in the past three decades. These reactions have become invaluable to fundamental research and industrial applications, because they can be used construct complicated molecules ...

EPFL2012

Pd, Pt, and Ru complexes of a pincer bis(amino)amide ligand

Rosario Scopelliti, Xile Hu, Oleg Vechorkin, Peng Ren, Isuf Salihu

An improved synthesis of pincer ligand bis[(2-dimethylamino)phenyl]amine (MeN2NH) was reported. Reaction of the Li complex of MeN2N with suitable Pd, Pt, and Ru precursors gave the corresponding metal complexes. The structures of the Pd, Pt, and Ru complex ...

Royal Society of Chemistry2011

A Structure-Activity Study of Ni-Catalyzed Alkyl-Alkyl Kumada Coupling. Improved Catalysts for Coupling of Secondary Alkyl Halides

Rosario Scopelliti, Xile Hu, Oleg Vechorkin, Peng Ren, Kim Dimuth Von Allmen

A structure–activity study was carried out for Ni catalyzed alkyl–alkyl Kumada-type cross coupling reactions. A series of new nickel(II) complexes including those with tridentate pincer bis(amino)amide ligands (RN2N) and those with bidentate mixed amino-am ...

2011