Pyrene-Based Mono- and Di-N-Heterocyclic Carbene Ligand Complexes of Ruthenium for the Preparation of Mixed Arylated/Alkylated Arylpyridines
作者:Sergio Gonell、Eduardo Peris
DOI:10.1021/cs500735u
日期:2014.8.1
di-N-heterocyclic carbene ligands, two rutheniumcomplexes (one monometallic and the other dimetallic) have been obtained and fully characterized. The molecular structure of the dimetallic complex has been determined by means of X-ray diffraction studies. The electrochemical studies reveal that the metal–metal communication in the dimetallic complex is weak. The catalytic activity of both complexes has been
Cobalt-Phenanthroline Catalysts for the ortho Alkylation of Aromatic Imines under Mild Reaction Conditions
作者:Ke Gao、Naohiko Yoshikai
DOI:10.1002/anie.201101823
日期:2011.7.18
with phenanthroline‐type ligands and activated with Grignard reagents serve as inexpensive and effective catalysts for the ortho alkylation of aromaticimines with a variety of olefins (see scheme). The new catalytic systems feature remarkably mild reaction conditions for CH bond activation and functionalization.
Regioselective alkylation of 2-phenylpyridines with terminal alkenes via C–H bond activation by a rhodium catalyst
作者:Yeong-Gweon Lim、Jung-Bu Kang、Yong Hae Kim
DOI:10.1039/p19960002201
日期:——
2-Phenylpyridine 1a reacts with various terminal alkenes in the presence of a rhodium(I) complex catalyst to give the corresponding mono ortho-alkylated products 2a-i and doubly alkylated products 3a-b (9:1), The same reaction using 3-methyl-2-phenylpyridine 1b gives the mono alkylated products 2j-n exclusively under the same reaction conditions due to steric hindrance between the methyl group of the pyridine and the alkyl group of 2j-n.
Carboxylate-Assisted Ruthenium(II)-Catalyzed Hydroarylations of Unactivated Alkenes through C-H Cleavage
作者:Marvin Schinkel、Ilan Marek、Lutz Ackermann
DOI:10.1002/anie.201208446
日期:2013.4.2
Catalytic: Ruthenium(II)biscarboxylate complexes enabled highly effective hydroarylations of unactivatedalkenesthrough CH bond activation. This method has a broad substrate scope and allowed for versatile functionalizations of highly fluorinated alkenes.