Rutgers, the State University of New Jersey

Chevron U.s.a. Inc.

The University of North Carolina at Chapel Hill

Exxonmobil Research and Engineering Company

International Flavors & Fragrances Inc.

University of Virginia Patent Foundation

Alan Stuart Goldman

Robert James Saxton

William L Schinski

Robert Timothy Stibrany

Oleg Mironov

Thomas R Dugan

Akshai Kumar

Maurice S Brookhart

Zheng Huang

Ritu Ahuja

Kun Wang

David O Marler

Thomas Brent Gunnoe

Sunitha Rao Tadepalli

Geatesh Karunakaran Tampy

Michael S Webster-Gardiner

John P Cherkauskas

Long Van Dinh

Emily Carson

Xiaoguang Zhou

Sabuj Kumar Kundu

Nichole Schwartz

Amy H Roy

Andrew M Steffens

Santanu Malakar

Yang Gao

The present disclosure provides compounds which are useful for a number of catalytic transformations of organic molecules, non-limiting examples including dehydrogenation of alkanes. The present disclosure further relates to methods of preparing the compounds of the present disclosure.

Phebox ligands and methods of making same

Catalytic methods for synthesis of super linear alkenyl arenes and alkyl arenes are provided. The methods are capable of synthesizing super linear alkyl and alkenyl arenes from simple arene and olefin starting materials and with high selectivity for linear coupling. Methods are also provided for making a 2,6-dimethylnapthalene (DMN) or 2,6-methylethylnapthalene (MEN).

Catalytic synthesis of super linear alkenyl arenes using rhodium catalysts

Provided herein are transition metal complexes that are useful in the acceptorless dehydrogenation of various substrates, including alkanes. Also provided are methods of dehydrogenating substrates to provide unsaturated products such as olefins.

Dehydrogenation of substrates by transition metal complexes

The present invention relates in part to the unexpected discovery of novel complexes capable of catalyzing the selective dehydrogenative coupling of olefins. The invention further relates to the use of these complexes for the selective coupling of olefins.

Catalysts for selective coupling of olefins, and methods of making and using same

Disclosed are methods of preparing unsaturated carbocyclic compounds through dehydrogenation of corresponding saturated carbocyclic compounds.

Preparing unsaturated carbocyclic compounds

Described herein are methods useful for preparing alkylaromatics.

Preparation of alkylaromatic compounds

Disclosed herein are processes for tandem alkene dehydrogenation/alkene dimerization using an iridium pincer complex catalyst on a support comprising magnesium silicates (e.g., Florisil&#xae;). The reaction process comprises providing an iridium pincer complex bound to a solid support comprising magnesium silicates; providing a gaseous alkane feedstock comprising at least one alkane; and contacting the gaseous alkane feedstock with the iridium pincer complex bound to the solid support in the presence of a hydrogen acceptor to form dimerized alkenes. The processes disclosed herein can accomplish facile, low-temperature tandem transfer dehydrogenation of alkanes and dimerization of alkenes with unprecedented TONs at a reasonable rate of conversion.

Alkane-alkene coupling via tandem alkane-dehydrogenation/alkene-dimerization catalyzed by pincer iridium catalyst heterogenized on solid supports

Provided is a Group 9 novel metal catalyst complex further comprising a ketone-containing cocatalyst. The metal catalyst complex is useful in generating olefins from alkanes with great efficiency. In one embodiment, provided is an iridium catalyst complex useful in the dehydrogenation of alkanes comprising a ketone-containing cocatalyst and iridium complexed with a tridentate ligand. Also provided is a novel dehydrogenation method which utilizes the catalyst composition. In other embodiments, a novel process for preparing oligomers from alkanes utilizing the catalyst composition is provided.

Catalyst complex and use thereof in alkane oligomerization

Disclosed herein are processes for dehydrogenation of an alkane to an alkene using an iridium pincer complex and iridium pincer complexes. In the dehydrogenation reactions, hydrogen that is co-formed during the process must be removed for the chemical reaction to proceed and to prevent the excess hydrogen from poisoning the catalyst. In one embodiment the process comprises providing an alkane feedstock comprising at least one alkane and contacting the alkane with an iridium pincer complex in the presence of a hydrogen acceptor selected from the group consisting of ethylene, propene, or mixtures to form an alkene product. The processes disclosed herein can accomplish facile, low-temperature transfer dehydrogenation of alkanes with unprecedented selectivities and TONs at a reasonable rate of conversion.

Iridium pincer complex for alkane dehydrogenation process

Disclosed herein are processes for dehydrogenation of an alkane to an alkene using an iridium pincer complex. In the dehydrogenation reactions, hydrogen that is co-formed during the process must be removed for the chemical reaction to proceed and to prevent the excess hydrogen from poisoning the catalyst. In one embodiment the process comprises providing an alkane feedstock comprising at least one alkane and contacting the alkane with an iridium pincer complex in the presence of a hydrogen acceptor selected from the group consisting of ethylene, propene, or mixtures to form an alkene product. The processes disclosed herein can accomplish facile, low-temperature transfer dehydrogenation of alkanes with unprecedented selectivities and TONs at a reasonable rate of conversion.

Alkane dehydrogenation process

The invention provides methods and compositions useful for synthesizing alkylaromatics from an n-alkanes.

Aromatization or dehydrocyclization of N-alkanes using soluble transition metal complexes

Provided is a novel iridium catalyst complex which is useful in the dehydrogenation of alkanes. The iridium complex comprises the metal iridium atom complexed with a benzimidazolyl-containing ligand. The iridium atom can be coordinated with the nitrogen atoms in the benzimidazolyl-containing ligand to form an NCN pincer ligand complex. In another embodiment, the iridium catalyst is used, with or without a co-catalyst, in a dehydrogenation reaction converting alkanes to olefins. The reaction can be in a closed or open system, and can be run in a liquid or gaseous phase.

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Highland, NJ, United States of America

Alan Stuart Goldman