Search results for: Robert A. Gossage

Items from 1 to 20 out of 33 results

article

New Hypercoordinating Organostannanes for the Modular Functionalization of Mono‐ and Polystannanes: Synthetic and Computational Studies**

Jeffrey Pau, Jung‐Won Choi, Kaitlyn Silverthorne, Mokhamed Ranne, more

European Journal of Inorganic Chemistry > 2022 > 7 > n/a - n/a

A series of potentially hypercoordinate tin compounds derived from a substitutionally labile tosyl stannane (5) was produced to gain access to a library of propyloxybiphenyl (11), propylmethoxy (12, 14, 18, 22) or propylthioester (13, 15, 19, 23) stannanes for structure/property/polymerization investigations. Structural characterizations by single crystal X‐ray diffraction of 12, 14, 18 and 19 were...

article

On the kinetics and mechanism of the conversion of Cr(CO)₅(κ¹-P-dppm) to Cr(CO)₄(κ²-P,P′-dppm) (dppm = 1,2-diphenylphosphinomethane): an alternative hypothesis

Robert A. Gossage

Transition Metal Chemistry > 2018 > 43 > 1 > 39-43

The data from a previously reported kinetic evaluation dealing with the conversion of Cr(CO)₅(κ¹-P-dppm) (1: dppm = 1,2-diphenylphosphinomethane) into the corresponding chelated complex Cr(CO)₄(κ²-P,P′-dppm) (2), via CO loss, is re-evaluated. The conclusion is that the process is more likely to involve a rate-determining step that is first-order in [Cr(CO)₅(κ¹-P-dppm)], as opposed to the previously...

article

Proof of Concept Studies Directed Towards Designed Molecular Wires: Property‐Driven Synthesis of Air and Moisture‐Stable Polystannanes

Jeffrey Pau, Alan J. Lough, R. Stephen Wylie, Robert A. Gossage, more

Chemistry – A European Journal > 23 > 57 > 14367 - 14374

Polystannanes with azobenzene moieties designed to protect the Sn–Sn backbone from light‐ and moisture‐induced degradation are described. The azo‐stannyl precursor 3 (70 %) is converted in good yields (88–91 %) to the mono‐ (4), and dichlorostannanes (5), by sequential chlorination, followed by further reduction of 5 to the dihydride (6) using NaBH₄ (78 %). All stannanes were characterised by NMR...

article

Amido-pincer complexes of Cu(II): Synthesis, coordination chemistry and applications in catalysis

Mahroo Taghvaee, María J. Rodríguez-Álvarez, Joaquín García-Álvarez, Ignacio del Río, more

Journal of Organometallic Chemistry > 2017 > 845 > C > 107-114

The synthesis and characterisation of five novel copper (II) complexes incorporating an amido pincer ligand derived from the deprotonation of N-(2-{4,4-dimethyl-4,5-Dihydrooxazol-2-yl}phenyl)picolinamide (i.e., L1H) or a chiral indanol-based congener (L2H) are described. These Cu materials are obtained from the treatment of EtOH solutions of L1H or L2H with CuX₂(OH₂)_n species (X = Cl, Br, NO₃, BF₄...

chapter

A General Survey and Recent Advances in the Activation of Unreactive Chemical Bonds by Metal Complexes

Robert A. Gossage, Gerard Koten

Topics in Organometallic Chemistry > Activation of Unreactive Bonds and Organic Synthesis > 1-8

The activation of chemical bonds is perhaps the most important area of modern chemistry. In our never ending search for cheap raw materials, the use of abundant but traditionally unreactive molecules as synthetic precursors is becoming increasingly more attractive. A major goal of this endeavor is to devise not only better methods to produce bulk (commodity) chemicals but also to synthesize new materials...

article

Recent advances in the homogeneous polymerisation of olefins mediated by nickel complexes

Yee-Yue Grace Luk, Daniel A. Foucher, Robert A. Gossage

Comptes rendus - Chimie > 2013 > 16 > 6 > 573-579

A brief overview is presented on recent advances in the application of nickel coordination complexes as mediators of olefin polymerisation; in some cases involving stereo-regular polymer formation where appropriate. Emphasis is also given on recent findings concerning di- and tri-nuclear Ni clusters with details on ethylene, methyl methacrylate or styrene-based monomer polymerisations.

article

Unusual Cationic Trinuclear Nickel Clusters Incorporating Oxazolines or N , N , N ′, N ′-Tetramethylethylene-1,2-diamine: Applications in Olefin Polymerization

Sanja Resanović, R. Stephen Wylie, J. Wilson Quail, Daniel A. Foucher, more

Inorganic Chemistry > 2011 > 50 > 20 > 9930 - 9932

article

Synthesis and biological activities of 4-N-(anilinyl-n-[oxazolyl])-7-chloroquinolines (n=3′ or 4′) against Plasmodium falciparum in in vitro models

Erin E. Gordey, Paras N. Yadav, Marcus P. Merrin, Jill Davies, more

Bioorganic & Medicinal Chemistry Letters > 2011 > 21 > 15 > 4512-4515

The synthesis (Pd-mediated coupling strategy) and characterization (NMR, IR, elemental analysis, etc.) of a short series of quinoline–oxazole hybrid compounds has been carried out. These materials are found to be moderately active against Plasmodium falciparum in vitro, with activities in the sub-micromolar range, and to display acceptable cytotoxicity to mononuclear leukocytes. Chemical modification...

article

Piperonylic anhydride: Isolation and conformational analysis by X-ray crystallography and density functional theory calculations

Maja W. Chojnacka, Alan J. Lough, R. Stephen Wylie, Robert A. Gossage

Journal of Molecular Structure > 2011 > 991 > 1-3 > 158-161

The title compound (1), a symmetrically substituted acyclic anhydride, is shown to crystallise in the monoclinic space group P2 ₁ /n with a=4.7032(1)Å, b=17.8748(6)Å, c=15.6869(5)Å, β=98.3980(17)° and V=1304.64(7)Å ³ . There are four molecules in the unit cell. Bond lengths and angles of 1 are comparable to the limited number of benzoic anhydride crystal structures that have been previously...

article

Oxazoles XXI. Three Ester Ammonium Salts Resulting from the Rupture of an Oxazoline Ring

Robert A. Gossage, Hilary A. Jenkins, J. Wilson Quail

Journal of Chemical Crystallography > 2010 > 40 > 3 > 272-277

The synthesis and characterisation of three ammonium salts that are formed via a ring opening of a 2-oxazoline (i.e., a 4,5-dihydro-1,3-oxazole) are described. Compound 1, derived from 2-phenyl-2-oxazoline (Phox), was isolated as a major reaction product during an unrelated synthesis using Phox which was being carried out in the presence of NO₃ ⁻ ions. The isolated compound is identified as the nitrate...

article

Resveratrol analog trans 3,4,5,4′-tetramethoxystilbene (DMU-212) mediates anti-tumor effects via mechanism different from that of resveratrol

Zengshuan Ma, Ommoleila Molavi, Azita Haddadi, Raymond Lai, more

Cancer Chemotherapy and Pharmacology > 2008 > 63 > 1 > 27-35

Purpose Resveratrol is a well-known chemopreventive and chemotherapeutic agent. Among all of the resveratrol analogs synthesized, 3,4,5,4′-tetramethoxystilbene (DMU-212) shows high activity and selectivity against various cancer cell types. The objective of this study is to investigate why DMU-212 has higher anti-tumor activity than resveratrol. Methods The effects of DMU-212 and resveratrol on...

article

Mononuclear ruthenium complexes containing chiral aminooxazolines: Syntheses, X-ray studies and catalytic activity

Javier A. Cabeza, Iván da Silva, Ignacio del Río, Robert A. Gossage, more

Journal of Organometallic Chemistry > 2007 > 692 > 20 > 4346-4352

The synthesis and characterisation of three novel mononuclear ruthenium(II) complexes containing one of the following chiral auxiliary ligands: 2-amino-(4R)-phenyl-2-oxazoline (amphox), indanyl-2-amino-(4R,5S)-2-oxazoline (aminox) or indanyl-(2′-anilinyl)-(4R,5S)-2-oxazoline (aninox) is described using [Ru ₂ Cl ₄ (η ⁶ -p-cym) ₂ ] (p-cym=1-isopropyl-4-methylbenzene)...

article

Oxazoline chemistry IX. Synthesis and characterisation of the first Zinc oxazoline dialkyldithiocarbamato complexes; X-ray crystal structure determinations of [Zn(S2CNR2-κ2S)2(2-R′-4,4-R″-2-oxazoline-κ1N)] (R=R′=Me, R″=H; R=Et, R′=Me, Et or Ph, R″=H; R=Bz; R′=R″=Me)

Andreas Decken, Charles R. Eisnor, Robert A. Gossage, Sarah M. Jackson

Inorganica Chimica Acta > 2006 > 359 > 6 > 1743-1753

The synthesis and characterisation (NMR, IR, X-ray diffraction and elemental analysis) of a series of zinc dialkyldithiocarbamato complexes incorporating a monodentate oxazoline ligand are described. These compounds represent the first known examples of oxazolines that are bound to a [Zn(S ₂ CNR ₂ ) ₂ ] fragment. The syntheses of the title materials involves the treatment of...

article

Oxazoline Chemistry. Part 11: Syntheses of natural and synthetic isoflavones, stilbenes and related species via C–C bond formation promoted by a Pd–oxazoline complex

Charles R. Eisnor, Robert A. Gossage, Paras N. Yadav

Tetrahedron > 2006 > 62 > 14 > 3395-3401

The complex trans-[PdCl ₂ (2-ethyl-2-oxazoline-κ ¹ N) ₂ ] (1) is shown to be an active and oxidatively robust catalyst for C–C bond forming reactions (Heck, Sonogashira, Ullmann, Miyaura–Suzuki, etc.). These reactions can be carried out in air without rigorous solvent/substrate purification and in the absence of additional free ligand. The general methodology described above...

article

Oxazoline chemistry. Part 12: A metal-mediated synthesis of DMU-212; X-ray diffraction studies of an important anti-cancer agent

Gordon G. Cross, Charles R. Eisnor, Robert A. Gossage, Hilary A. Jenkins

Tetrahedron Letters > 2006 > 47 > 13 > 2245-2247

An improved synthesis of the anti-cancer agent DMU-212 (trans-3,4,5,4′-tetramethoxystilbene) is described. The methodology involves the use of a Pd-oxazoline catalyst as a mediator of a regio-selective (Heck) C–C bond formation reaction. A simple isolation step is then used to obtain the title material. The compound has been further characterised in the solid-state by X-ray diffraction methods.

article

[Tetrahedron Lett. 45 (2004) 7689]

Robert A. Gossage, Hilary A. Jenkins, Paras N. Yadav

Tetrahedron Letters > 2005 > 46 > 31 > 5243

article

Synthesis and characterisation of the first transition metal complex of zoxazolamine (2-amino-5-chlorobenzoxazole): the X-ray crystal structure determination of [ZnCl2(η1-Nbenzoxazole-2-amino-5-chlorobenzoxazole)2]

Andreas Decken, Robert A. Gossage

Journal of Inorganic Biochemistry > 2005 > 99 > 2 > 664-667

The synthesis and characterisation (NMR, X-ray, elemental analysis) of the first transition metal complex of Zoxazolamine (1: 2-amino-5-chlorobenzoxazole), viz. [ZnCl ₂ (1) ₂ ] (2) is described; complex 2 is obtained in 77% yield from the treatment of 1 with ZnCl ₂ in acetone solution. The Zn compound is a mononuclear species (X-ray) with a distorted tetrahedral array of ligands...

article

Diastereoselective Self-Assembly of Chiral Diamine-Chelated Aryllithiums to Dimeric Aggregates

Anne M. Arink, Claudia M. P. Kronenburg, Johann T. B. H. Jastrzebski, Martin Lutz, more

Journal of the American Chemical Society > 2004 > 126 > 49 > 16249 - 16258

article

Application of an air stable Pd oxazoline complex for Heck, Suzuki, Sonogashira and related C–C bond-forming reactions

Robert A. Gossage, Hilary A. Jenkins, Paras N. Yadav

Tetrahedron Letters > 2004 > 45 > 41 > 7689-7691

The novel complex trans-[PdCl ₂ (η ¹ -N-2-ethyl-2-oxazoline) ₂ ] is shown to be an active and oxidatively robust catalyst for C–C bond-forming reactions (Heck, Sonogashira, Ullman, Suzuki), which can be carried out in air without rigorous solvent/substrate purification and in the absence of additional free ligand.

article

Thin-Layer Electrochemistry of 1,3-Diferrocenyl-2-buten-1-one: Direct Correlation between Driving Force and Liquid/Liquid Interfacial Electron Transfer Rates

Jie Xu, Amir Frcic, Jason A. C. Clyburne, Robert A. Gossage, more

The Journal of Physical Chemistry B > 2004 > 108 > 18 > 5742 - 5746

Publication date

Last 3 years (1)

Close

Date range setting

Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.

From:

To:
Set your own date range

Content availability

Available (31)
None (2)

Publication type

article (32)
book (1)

Keywords

Data set

Elsevier (21)
ACS (6)
Springer (4)
Wiley (2)

Journal

Tetrahedron Letters (7)
Journal of Organometallic Chemistry (6)
Inorganic Chemistry (2)
Inorganica Chimica Acta (2)
Organometallics (2)
Tetrahedron (2)
Bioorganic & Medicinal Chemistry Letters (1)
Cancer Chemotherapy and Pharmacology (1)
Chemistry – A European Journal (1)
Comptes rendus - Chimie (1)
European Journal of Inorganic Chemistry (1)
Journal of Chemical Crystallography (1)
Journal of Inorganic Biochemistry (1)
Journal of Molecular Structure (1)
Journal of the American Chemical Society (1)
The Journal of Physical Chemistry B (1)
Transition Metal Chemistry (1)
more

INFONA - science communication portal

Search results for: Robert A. Gossage

New Hypercoordinating Organostannanes for the Modular Functionalization of Mono‐ and Polystannanes: Synthetic and Computational Studies**

On the kinetics and mechanism of the conversion of Cr(CO)₅(κ¹-P-dppm) to Cr(CO)₄(κ²-P,P′-dppm) (dppm = 1,2-diphenylphosphinomethane): an alternative hypothesis

Proof of Concept Studies Directed Towards Designed Molecular Wires: Property‐Driven Synthesis of Air and Moisture‐Stable Polystannanes

Amido-pincer complexes of Cu(II): Synthesis, coordination chemistry and applications in catalysis

A General Survey and Recent Advances in the Activation of Unreactive Chemical Bonds by Metal Complexes

Recent advances in the homogeneous polymerisation of olefins mediated by nickel complexes

Unusual Cationic Trinuclear Nickel Clusters Incorporating Oxazolines or N , N , N ′, N ′-Tetramethylethylene-1,2-diamine: Applications in Olefin Polymerization

Synthesis and biological activities of 4-N-(anilinyl-n-[oxazolyl])-7-chloroquinolines (n=3′ or 4′) against Plasmodium falciparum in in vitro models

Piperonylic anhydride: Isolation and conformational analysis by X-ray crystallography and density functional theory calculations

Oxazoles XXI. Three Ester Ammonium Salts Resulting from the Rupture of an Oxazoline Ring

Resveratrol analog trans 3,4,5,4′-tetramethoxystilbene (DMU-212) mediates anti-tumor effects via mechanism different from that of resveratrol

Mononuclear ruthenium complexes containing chiral aminooxazolines: Syntheses, X-ray studies and catalytic activity

Oxazoline chemistry IX. Synthesis and characterisation of the first Zinc oxazoline dialkyldithiocarbamato complexes; X-ray crystal structure determinations of [Zn(S2CNR2-κ2S)2(2-R′-4,4-R″-2-oxazoline-κ1N)] (R=R′=Me, R″=H; R=Et, R′=Me, Et or Ph, R″=H; R=Bz; R′=R″=Me)

Oxazoline Chemistry. Part 11: Syntheses of natural and synthetic isoflavones, stilbenes and related species via C–C bond formation promoted by a Pd–oxazoline complex

Oxazoline chemistry. Part 12: A metal-mediated synthesis of DMU-212; X-ray diffraction studies of an important anti-cancer agent

[Tetrahedron Lett. 45 (2004) 7689]

Synthesis and characterisation of the first transition metal complex of zoxazolamine (2-amino-5-chlorobenzoxazole): the X-ray crystal structure determination of [ZnCl2(η1-Nbenzoxazole-2-amino-5-chlorobenzoxazole)2]

Diastereoselective Self-Assembly of Chiral Diamine-Chelated Aryllithiums to Dimeric Aggregates

Application of an air stable Pd oxazoline complex for Heck, Suzuki, Sonogashira and related C–C bond-forming reactions

Thin-Layer Electrochemistry of 1,3-Diferrocenyl-2-buten-1-one: Direct Correlation between Driving Force and Liquid/Liquid Interfacial Electron Transfer Rates

Filter options

Publication date

Content availability

Publication type

Keywords

Data set

Journal

INFONA - science communication portal

Search results for: Robert A. Gossage

Add recipient

Sending message cancelled

Are you sure you want to cancel sending this message?

Send message

Filter options

Publication date

Date range setting

Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.

Content availability

Publication type

Keywords

Data set

Journal

Reporting an error / abuse

Sending the report failed

Accessibility options