skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Rhodium Complexes of 2,6-Bis(dialkylphosphinomethyl)pyridines: Improved C–H Activation, Expanded Reaction Scope, and Catalytic Direct Arylation

Journal Article · · Organometallics

The reactivity of (PNP)Rh(Ph) (PNP = 2,6-bis(dialkylphosphinomethyl)pyridine) toward a variety of electrophiles (Ar–I, ArCH2Cl, O2, I2, B2pin2, and ArSO3H) was explored, and several new modes of oxidative reactivity were observed. We note substituting tBu2P for iPr2P provided 100-fold rate enhancement toward C–H bond activation and addressed the previously reported challenge of N2 inhibition. Studying the stoichiometric reactivity of (PNP)Rh complexes toward C–H cleavage and oxidative functionalization led to (PNP)Rh-catalyzed cross-coupling of aryl iodides with sp2 and sp3 C–H bonds.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
National Science Foundation ((NSF); USDOE Office of Science (SC)
Grant/Contract Number:
AC02-06CH11357; NSF/CHE-1346572; NSF/DMR-1531283
OSTI ID:
1437457
Journal Information:
Organometallics, Vol. 36, Issue 24; ISSN 0276-7333
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
ENGLISH
Citation Metrics:
Cited by: 16 works
Citation information provided by
Web of Science

References (56)

Catalytic C–H functionalization by metal carbenoid and nitrenoid insertion journal January 2008
Guiding principles for site selective and stereoselective intermolecular C–H functionalization by donor/acceptor rhodium carbenes journal January 2011
Evolution of C–H Bond Functionalization from Methane to Methodology journal December 2015
Undirected, Homogeneous C–H Bond Functionalization: Challenges and Opportunities journal May 2016
Recent Advances in C–H Functionalization journal January 2016
The medicinal chemist's toolbox for late stage functionalization of drug-like molecules journal January 2016
Controlling Site Selectivity in Palladium-Catalyzed C–H Bond Functionalization journal January 2012
Catalyst-Controlled Site-Selective Bond Activation journal March 2017
Beyond Directing Groups: Transition-Metal-Catalyzed CH Activation of Simple Arenes journal September 2012
Palladium-Catalyzed Ligand-Directed C−H Functionalization Reactions journal February 2010
C−H Activation for the Construction of C−B Bonds journal February 2010
A meta-selective C–H borylation directed by a secondary interaction between ligand and substrate journal August 2015
Ion Pair-Directed Regiocontrol in Transition-Metal Catalysis: A Meta-Selective C–H Borylation of Aromatic Quaternary Ammonium Salts journal September 2016
Lewis Acid-Base Interaction-Controlled ortho -Selective C−H Borylation of Aryl Sulfides journal December 2016
Noncovalent Interactions in Ir-Catalyzed C–H Activation: L-Shaped Ligand for Para-Selective Borylation of Aromatic Esters journal June 2017
Outer-Sphere Direction in Iridium C–H Borylation
  • Roosen, Philipp C.; Kallepalli, Venkata A.; Chattopadhyay, Buddhadeb
  • Journal of the American Chemical Society, Vol. 134, Issue 28 https://doi.org/10.1021/ja303443m
journal July 2012
High Turnover Remote Catalytic Oxygenation of Alkyl Groups:  How Steric Exclusion of Unbound Substrate Contributes to High Molecular Recognition Selectivity journal February 2008
Directed evolution of RebH for catalyst-controlled halogenation of indole C–H bonds journal January 2016
Harnessing non-covalent interactions to exert control over regioselectivity and site-selectivity in catalytic reactions journal January 2017
Pursuit of Noncovalent Interactions for Strategic Site-Selective Catalysis journal March 2017
Attractive noncovalent interactions in asymmetric catalysis: Links between enzymes and small molecule catalysts journal October 2010
A supramolecular microenvironment strategy for transition metal catalysis journal December 2015
Scope and Mechanism of Cooperativity at the Intersection of Organometallic and Supramolecular Catalysis journal July 2016
Activation of C−H Bonds by Metal Complexes journal December 1997
Activation of carbon-hydrogen bonds in saturated hydrocarbons on photolysis of (.eta.5-C5Me5)(PMe3)IrH2. Relative rates of reaction of the intermediate with different types of carbon-hydrogen bonds and functionalization of the metal-bound alkyl groups journal June 1983
Generation, alkyne cycloaddition, arene carbon-hydrogen activation, nitrogen-hydrogen activation and dative ligand trapping reactions of the first monomeric imidozirconocene (Cp2Zr:NR) complexes journal December 1988
Mechanism of activation of carbon-hydrogen bonds in tetramethylsilane and mesitylene and mechanism of intramolecular activation in trimethylphosphine on thermolysis of tetrakis(trimethylphosphine)hydridoneopentylosmium(II) journal January 1990
Methane vs benzene activation via transient tantalum amido-imido complex tert-Bu3SiNHTa(:NSiBu3-tert)2: structure of (py)2MeTa(:NSiBu3-tert)2 journal January 1993
Mechanistic Investigation of Benzene C−H Activation at a Cationic Platinum(II) Center:  Direct Observation of a Platinum(II) Benzene Adduct journal November 2000
A Dearomatized Anionic PNP Pincer Rhodium Complex: C–H and H–H Bond Activation by Metal–Ligand Cooperation and Inhibition by Dinitrogen journal May 2011
The Importance of Steric Factors in Iridium Pincer Complexes journal February 2015
Oxidative Addition Reactions of Organorhodium(I) Complexes Containing the Tridentate Ligand 2,6-Bis(diphenylphosphanylmethyl)pyridine [Rh(PNP)R] (R = CH3, C6H5) with Iodine and Methyl Iodide and Investigation of the Reductive Elimination journal March 1999
Direct Observation of Reductive Elimination of MeX (X = Cl, Br, I) from Rh III Complexes: Mechanistic Insight and the Importance of Sterics journal July 2013
Competitive C−I versus C−CN Reductive Elimination from a Rh III Complex. Selectivity is Controlled by the Solvent journal October 2008
Synthesis and Characterization of Organorhodium(I) Complexes with the Tridentate Ligand 2,6-Bis(diphenylphosphanylmethyl)pyridine [Rh(PNP)R] (R = CH3, C6H5) and Their Reactivity toward Ethylene and Protic Acids journal October 1998
Bottom-Up Construction of a CO 2 -Based Cycle for the Photocarbonylation of Benzene, Promoted by a Rhodium(I) Pincer Complex journal July 2016
C−H Bond Activation by Rhodium(I) Phenoxide and Acetate Complexes: Mechanism of H−D Exchange between Arenes and Water journal April 2008
CH Bond Activation by Rhodium(I) Hydroxide and Phenoxide Complexes journal June 2007
ortho C−H Activation of Haloarenes and Anisole by an Electron-Rich Iridium(I) Complex:  Mechanism and Origin of Regio- and Chemoselectivity. An Experimental and Theoretical Study journal May 2006
Metal−Ligand Cooperation in C−H and H 2 Activation by an Electron-Rich PNP Ir(I) System:  Facile Ligand Dearomatization−Aromatization as Key Steps journal December 2006
Selective Addition to Iridium of Aryl C−H Bonds Ortho to Coordinating Groups. Not Chelation-Assisted journal October 2004
O 2 Activation by Metal–Ligand Cooperation with Ir I PNP Pincer Complexes journal April 2015
Carbon−Halide Oxidative Addition and Carbon−Carbon Reductive Elimination at a (PNP)Rh Center journal February 2006
Competition Studies of Oxidative Addition of Aryl Halides to the (PNP)Rh Fragment journal May 2011
Halobenzenes and Ir(I):  Kinetic C−H Oxidative Addition and Thermodynamic C−Hal Oxidative Addition journal December 2005
Thioether, Dinitrogen, and Olefin Complexes of (PNP)Rh:  Kinetics and Thermodynamics of Exchange and Oxidative Addition Reactions journal November 2007
Transition-Metal-Free Coupling Reactions journal September 2014
An efficient organocatalytic method for constructing biaryls through aromatic C–H activation journal October 2010
The electron is a catalyst journal August 2014
Insight into Transmetalation Enables Cobalt-Catalyzed Suzuki–Miyaura Cross Coupling journal November 2016
Cobalt-Catalyzed C(sp 2 )-H Borylation: Mechanistic Insights Inspire Catalyst Design journal August 2016
Investigations of Iridium-Mediated Reversible C−H Bond Cleavage: Characterization of a 16-Electron Iridium(III) Methyl Hydride Complex journal June 2009
Syntheses and Structures of Group 14 1,3-Dimetallacyclobutanes journal October 2003
Transition Metal-Catalyzed Addition of Amines to Acrylic Acid Derivatives. A High-Throughput Method for Evaluating Hydroamination of Primary and Secondary Alkylamines journal May 2001
Synthesis, Structure, and Reactivity of New Rhodium and Iridium Complexes, Bearing a Highly Electron-Donating PNP System. Iridium-Mediated Vinylic C−H Bond Activation journal March 2002
An efficient synthesis of 2,6-di-tert-butylphenyl esters by palladium-catalysed carbonylation of 4-bromobiphenyl journal January 1994

Cited By (3)

Selective Carbanion–Pyridine Coordination of a Reactive P,N Ligand to Rh I journal February 2019
Transition‐Metal‐Free Glucose‐Derived Carbonaceous Catalyst Catalyzes Direct C‐H Arylation of Unactivated Arenes with Aryl Halides journal May 2019
Ammonia borane and hydrazine bis(borane) dehydrogenation mediated by an unsymmetrical (PNN) ruthenium pincer hydride: metal–ligand cooperation for hydrogen production journal January 2019