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Witte JM, Service J, Addo MA, Semakieh B, Collins E, Sams C, Dorsey TR, Garrelts E, Blumenshine CA, Cooper T, Martinez M, Hamaker CG, Ferrence GM, Hitchcock SR. Diastereoselective and Enantioselective Synthesis of α- p-Methoxyphenoxy-β-Lactones: Dependence on the Stereoelectronic Properties of the β-Hydroxy-α- p-Methoxyphenoxycarboxylic Acid Precursors. J Org Chem 2022; 87:9619-9634. [PMID: 35862509 DOI: 10.1021/acs.joc.2c00608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Treatment of β-hydroxy-α-p-methoxyphenoxy carboxylic acids derived from the asymmetric glycolate aldol addition reaction with p-nitrobenzenesulfonyl chloride yielded divergent results depending on the nature of the β-substituent of the carboxylic acid. Substrates bearing either alkyl substituents (R = -n-butyl, -n-octyl, -benzyl, isopropyl, -tert-butyl) or aryl systems bearing electron-withdrawing substituents (R = -p-C6H4Cl, -p-C6H4Br, -p-C6H4NO2) yielded β-lactones. In contrast, α-p-methoxyphenoxy-β-hydroxycarboxylic acids bearing electron-donating aryl groups or the sterically demanding 2-naphthyl group formed (Z)-alkenes.
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Affiliation(s)
- Jordan M Witte
- Department of Chemistry, Illinois State University, Normal, Illinois 61790-4160, United States
| | - Jasmine Service
- Department of Chemistry, Illinois State University, Normal, Illinois 61790-4160, United States
| | - Marian Aba Addo
- Department of Chemistry, Illinois State University, Normal, Illinois 61790-4160, United States
| | - Bader Semakieh
- Department of Chemistry, Illinois State University, Normal, Illinois 61790-4160, United States
| | - Erin Collins
- Department of Chemistry, Illinois State University, Normal, Illinois 61790-4160, United States
| | - Christopher Sams
- Department of Chemistry, Illinois State University, Normal, Illinois 61790-4160, United States
| | - Timothy R Dorsey
- Department of Chemistry, Illinois State University, Normal, Illinois 61790-4160, United States
| | - Elizabeth Garrelts
- Department of Chemistry, Illinois State University, Normal, Illinois 61790-4160, United States
| | - Cassidy A Blumenshine
- Department of Chemistry, Illinois State University, Normal, Illinois 61790-4160, United States
| | - Trace Cooper
- Department of Chemistry, Illinois State University, Normal, Illinois 61790-4160, United States
| | - Moses Martinez
- Department of Chemistry, Illinois State University, Normal, Illinois 61790-4160, United States
| | - Christopher G Hamaker
- Department of Chemistry, Illinois State University, Normal, Illinois 61790-4160, United States
| | - Gregory M Ferrence
- Department of Chemistry, Illinois State University, Normal, Illinois 61790-4160, United States
| | - Shawn R Hitchcock
- Department of Chemistry, Illinois State University, Normal, Illinois 61790-4160, United States
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Yawson GK, Will MF, Huffman SE, Strandquist ET, Bothwell PJ, Oliver EB, Apuzzo CF, Platt DC, Weitzel CS, Jones MA, Ferrence GM, Hamaker CG, Webb MI. A Dual-Pronged Approach: A Ruthenium(III) Complex That Modulates Amyloid-β Aggregation and Disrupts Its Formed Aggregates. Inorg Chem 2022; 61:2733-2744. [PMID: 35102739 DOI: 10.1021/acs.inorgchem.1c01651] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Alzheimer's disease (AD) is a devastating neurological disorder for which soluble oligomers of the peptide amyloid-β (Aβ) are now recognized as the neurotoxic species. Metal-based therapeutics are uniquely suited to target Aβ, with ruthenium-based (Ru) complexes emerging as propitious candidates. Recently, azole-based Ru(III) complexes were observed to modulate the aggregation of Aβ in solution, where the inclusion of a primary amine proximal to the ligand coordination site improved the activity of the complexes. To advance these structure-activity relationships, a series of oxazole-based Ru complexes were prepared and evaluated for their ability to modulate Aβ aggregation. From these studies, a lead candidate, Oc, emerged that had superior activity relative to its azole predecessors in modulating the aggregation of soluble Aβ and diminishing its cytotoxicity. Further evaluation of Oc demonstrated its ability to disrupt formed Aβ aggregates, resulting in smaller amorphous species. Because altering both sides of the aggregation equilibrium for Aβ has not been previously suggested for metal-based complexes for AD, this work represents an exciting new avenue for improved therapeutic success.
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Affiliation(s)
- Gideon K Yawson
- Department of Chemistry, Illinois State University, Normal, Illinois 61790-4160, United States
| | - Mark F Will
- Department of Chemistry, Illinois State University, Normal, Illinois 61790-4160, United States
| | - Samantha E Huffman
- Department of Chemistry, Illinois State University, Normal, Illinois 61790-4160, United States
| | - Evan T Strandquist
- Department of Chemistry, Illinois State University, Normal, Illinois 61790-4160, United States
| | - Paige J Bothwell
- Core Microscope Facility, Department of Biological Sciences, Northern Illinois University, DeKalb, Illinois 60115, United States
| | - Ethan B Oliver
- Department of Chemistry, Illinois State University, Normal, Illinois 61790-4160, United States
| | - C Fiore Apuzzo
- Department of Chemistry, Illinois State University, Normal, Illinois 61790-4160, United States
| | - David C Platt
- Department of Chemistry, Illinois State University, Normal, Illinois 61790-4160, United States
| | - Christopher S Weitzel
- Department of Chemistry, Illinois State University, Normal, Illinois 61790-4160, United States
| | - Marjorie A Jones
- Department of Chemistry, Illinois State University, Normal, Illinois 61790-4160, United States
| | - Gregory M Ferrence
- Department of Chemistry, Illinois State University, Normal, Illinois 61790-4160, United States
| | - Christopher G Hamaker
- Department of Chemistry, Illinois State University, Normal, Illinois 61790-4160, United States
| | - Michael I Webb
- Department of Chemistry, Illinois State University, Normal, Illinois 61790-4160, United States
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Mensah S, Rosenthal JD, Dagar M, Brown T, Mills JJ, Hamaker CG, Ferrence GM, Webb MI. A Ru( ii)-arene-ferrocene complex with promising antibacterial activity. Dalton Trans 2022; 51:17609-17619. [DOI: 10.1039/d2dt02696a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The evolution of high virulence bacterial strains has necessitated the development of novel therapeutic agents to treat resistant infections.
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Affiliation(s)
- Stephen Mensah
- Department of Chemistry, Illinois State University, Normal, IL, 61790, USA
| | | | - Mamta Dagar
- Department of Chemistry, University of Rochester, Rochester, NY, 14627, USA
| | - Tyson Brown
- Department of Chemistry, Illinois State University, Normal, IL, 61790, USA
| | - Jonathan J. Mills
- Department of Chemistry, Illinois State University, Normal, IL, 61790, USA
| | | | | | - Michael I. Webb
- Department of Chemistry, Illinois State University, Normal, IL, 61790, USA
- Department of Chemistry, SUNY Geneseo, Geneseo, NY, 14454, USA
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Austermuehle BJ, Collins ES, Hamaker CG, Hitchcock SR. Synthetic preparation of N-alkyl and N-aryl arenesulfinamides using an arenesulfinic acid-CDI driven approach. SYNTHETIC COMMUN 2021. [DOI: 10.1080/00397911.2021.1981943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
| | - Erin S. Collins
- Department of Chemistry, Illinois State University, Normal, IL, USA
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Hitchcock SR, Shaw JL, Austermuehle BJ, Witte JM, Dorsey TR, Delach C, Hamaker CG. N-p-Toluenesulfinylimidazole: A New in situ Reagent for the Mild and Efficient Synthesis of p-Toluenesulfinate Alkyl Esters and Aryl Esters. SYNTHESIS-STUTTGART 2021. [DOI: 10.1055/a-1472-7578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
AbstractA new synthetic methodology has been developed for the synthesis of sulfinate alkyl and aryl esters. The methodology involves the combination of p-toluenesulfinic acid and 1,1′-carbonyldiimidazole (CDI) to create the putative reagent sulfinylimidazole. The process spontaneously releases carbon dioxide upon the addition of the CDI to the acid suggesting the rapid formation of the proposed reagent. Reaction of this reagent with a series of alcohols (primary, secondary, and tertiary) afforded the corresponding sulfinate alkyl esters in good to excellent yields by the addition of alcohols. It was also possible to form the related sulfinate aryl esters by treating the proposed sulfinylimidazole with selected phenols (phenol, p-tert-butylphenol, and thymol). The aryl esters were formed in excellent conversion based on analysis of the 500 MHz 1H NMR spectra of the crude reaction mixtures.
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Celestine MJ, Lawrence MA, Schott O, Picard V, Hanan GS, Marquez EM, Harold CG, Kuester CT, Frenzel BA, Hamaker CG, Hightower SE, McMillen CD, Holder AA. Synthesis, structure, and hydrogen evolution studies of a heteroleptic Co(III) complex. Inorganica Chim Acta 2021. [DOI: 10.1016/j.ica.2020.120195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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7
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Li EW, Katinas J, Jones MA, Hamaker CG. Structural characterization of naphthalene sulfonamides and a sulfonate ester and their in vitro efficacy against Leishmania tarentolae promastigotes. NEW J CHEM 2021. [DOI: 10.1039/d0nj06320g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Structural and biological activity analyses of two naphthalene sulfonamides and a naphthalene sulfonate ester.
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Affiliation(s)
- Edward W. Li
- Department of Chemistry
- Illinois State University Normal
- USA
- William Fremd High School
- Palatine
| | - Jade Katinas
- Department of Chemistry
- Illinois State University Normal
- USA
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Yawson GK, Huffman SE, Fisher SS, Bothwell PJ, Platt DC, Jones MA, Ferrence GM, Hamaker CG, Webb MI. Ruthenium(III) complexes with imidazole ligands that modulate the aggregation of the amyloid-β peptide via hydrophobic interactions. J Inorg Biochem 2020; 214:111303. [PMID: 33166864 DOI: 10.1016/j.jinorgbio.2020.111303] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 10/27/2020] [Accepted: 10/27/2020] [Indexed: 12/14/2022]
Abstract
Alzheimer's disease (AD) is the most common form of dementia, characterized by extracellular protein deposits, comprised primarily of the peptide amyloid-beta (Aβ), are a pathological indicator of the disease. Commonly known as Aβ plaques, these deposits contain a relatively high concentration of metals, making metallotherapeutics uniquely suited to target soluble Aβ, thereby limiting its aggregation and cytotoxicity. Ruthenium-based complexes are promising candidates for advancement, as the complex PMRU20 (2-aminothiazolium [trans-RuCl4(2-aminothiazole)2]) and several thiazole-based derivatives were found to prevent the aggregation of Aβ, with hydrogen-bonding functional groups improving their performance. Further investigation into the impact of the heteroatom in the azole ring on the activity of Ru complexes was achieved through the synthesis and evaluation of a small set of imidazole-based compounds. The ability of the complexes to prevent the aggregation of Aβ was determined where the same sample was subjected to analysis by three complementary methods: ThT fluorescence, dynamic light scattering (DLS), and transmission electron microscopy (TEM). It was found that hydrophobic interactions, along with hydrogen-bonding via the imidazole nitrogen heteroatom, promoted interactions with the Aβ peptide, thereby limiting its aggregation. Furthermore, it was found that having rapid and sequential exchange proved detrimental as it resulted in a decreased association with Aβ. These results highlight important considerations between a balance of intermolecular interactions and ligand exchange kinetics in the design of further therapeutic candidates.
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Affiliation(s)
- Gideon K Yawson
- Department of Chemistry, Illinois State University, Normal, IL 61790-4160, United States of America
| | - Samantha E Huffman
- Department of Chemistry, Illinois State University, Normal, IL 61790-4160, United States of America
| | - Samuel S Fisher
- Department of Chemistry, Illinois State University, Normal, IL 61790-4160, United States of America
| | - Paige J Bothwell
- Core Microscope Facility, Department of Biological Sciences, Northern Illinois University, DeKalb, IL 60115, United States of America
| | - David C Platt
- Department of Chemistry, Illinois State University, Normal, IL 61790-4160, United States of America
| | - Marjorie A Jones
- Department of Chemistry, Illinois State University, Normal, IL 61790-4160, United States of America
| | - Gregory M Ferrence
- Department of Chemistry, Illinois State University, Normal, IL 61790-4160, United States of America
| | - Christopher G Hamaker
- Department of Chemistry, Illinois State University, Normal, IL 61790-4160, United States of America
| | - Michael I Webb
- Department of Chemistry, Illinois State University, Normal, IL 61790-4160, United States of America.
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Huffman SE, Yawson GK, Fisher SS, Bothwell PJ, Platt DC, Jones MA, Hamaker CG, Webb MI. Ruthenium(iii) complexes containing thiazole-based ligands that modulate amyloid-β aggregation. Metallomics 2020; 12:491-503. [PMID: 32239079 DOI: 10.1039/d0mt00054j] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Alzheimer's Disease (AD) is a devastating neurodegenerative disorder where one of the commonly observed pathological hallmarks is extracellular deposits of the peptide amyloid-β (Aβ). These deposits contain a high concentration of metals and initially presented a promising target for therapy; however it has become increasingly evident that the soluble form of the peptide is neurotoxic, not the amyloidogenic species. Metal-based therapeutics are uniquely suited to target soluble Aβ and have shown considerable promise to prevent the aggregation and induced cytotoxicity of the peptide in vitro. Herein, we have prepared a small series of derivatives of two promising Ru(iii) complexes NAMI-A (imidazolium [trans-RuCl4(1H-imidazole)(dimethyl sulfoxide-S)]) and PMRU20 (2-aminothiazolium [trans-RuCl4(2-aminothiazole)2]), to determine structure-activity relationships (SAR) for Ru(iii) therapeutics for AD. Using the three complementary methods of Thioflavin T fluorescence, dynamic light scattering (DLS), and transmission electron microscopy (TEM), it was determined that the symmetry around the metal center did not significantly impact the activity of the complexes, but rather the attached thiazole ligand(s) mitigated Aβ aggregation. Across both families of Ru(iii) complexes the determined SAR for the functional groups on the thiazole ligands to modulate Aβ aggregation were NH2 > CH3 > H. These results highlight the importance of secondary interactions between the metallotherapeutic and the Aβ peptide where hydrogen-bonding has the greatest impact on modulating Aβ aggregation.
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Affiliation(s)
- Samantha E Huffman
- Department of Chemistry, Illinois State University, Normal, IL, 61790-4160, USA.
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Kaufman RH, Law CM, Simanis JA, Woodall EL, Zwick CR, Wedler HB, Wendelboe P, Hamaker CG, Goodell JR, Tantillo DJ, Mitchell TA. Oxidopyrylium-Alkene [5 + 2] Cycloaddition Conjugate Addition Cascade (C3) Sequences: Scope, Limitation, and Computational Investigations. J Org Chem 2018; 83:9818-9838. [DOI: 10.1021/acs.joc.8b01322] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Riley H. Kaufman
- Department of Chemistry, Illinois State University, Campus Box 4160, Normal, Illinois 61790-4160, United States
| | - Chunyin M. Law
- Department of Chemistry, Illinois State University, Campus Box 4160, Normal, Illinois 61790-4160, United States
| | - Justin A. Simanis
- Department of Chemistry, Illinois State University, Campus Box 4160, Normal, Illinois 61790-4160, United States
| | - Erica L. Woodall
- Department of Chemistry, Illinois State University, Campus Box 4160, Normal, Illinois 61790-4160, United States
| | - Christian R. Zwick
- Department of Chemistry, Illinois State University, Campus Box 4160, Normal, Illinois 61790-4160, United States
| | - Henry B. Wedler
- Department of Chemistry, University of California, Davis, 1 Shields Avenue, Davis, California 95616, United States
| | - Paul Wendelboe
- Department of Chemistry, University of California, Davis, 1 Shields Avenue, Davis, California 95616, United States
| | - Christopher G. Hamaker
- Department of Chemistry, Illinois State University, Campus Box 4160, Normal, Illinois 61790-4160, United States
| | - John R. Goodell
- Department of Chemistry, Illinois State University, Campus Box 4160, Normal, Illinois 61790-4160, United States
| | - Dean J. Tantillo
- Department of Chemistry, University of California, Davis, 1 Shields Avenue, Davis, California 95616, United States
| | - T. Andrew Mitchell
- Department of Chemistry, Illinois State University, Campus Box 4160, Normal, Illinois 61790-4160, United States
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Simanis JA, Law CM, Woodall EL, Hamaker CG, Goodell JR, Mitchell TA. Investigation of oxidopyrylium-alkene [5+2] cycloaddition conjugate addition cascade (C3) sequences. Chem Commun (Camb) 2015; 50:9130-3. [PMID: 24990799 DOI: 10.1039/c4cc04163a] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Novel oxidopyrylium-alkene [5+2] cycloaddition conjugate addition cascade (C(3)) sequences are described. Various acetoxypyranone-alkenes with pendant nucleophiles undergo [5+2] cycloaddition followed by conjugate addition from the concave face of the intermediate pyranone toward bridged, tetracyclic ethers. In several cases, 3 new rings, 4 new bonds, and 6 new contiguous stereocenters are constructed with excellent diastereoselectivity. Finally, an asynchronous concerted reaction pathway is proposed to explain the high diastereoselectivity of the oxidopyrylium-alkene [5+2] C(3).
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Affiliation(s)
- Justin A Simanis
- Department of Chemistry, Illinois State University, Normal, IL 61790-4160, USA.
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Sullivan E, Avdeev M, Blom DA, Gahrs CJ, Green RL, Hamaker CG, Vogt T. Structure, stability, and photoluminescence in the anti-perovskites Na3W1−Mo O4F (0≤x≤1). J SOLID STATE CHEM 2015. [DOI: 10.1016/j.jssc.2015.07.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Gooodman CA, Janci EM, Onwodi O, Simpson CC, Hamaker CG, Hitchcock SR. A two-step, one pot preparation of amines via acyl succinimides. Synthesis of the calcimimetic agents cinacalcet, NPS R-467, and NPS R-568. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.05.095] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Frenzel BA, Hamaker CG, Hightower SE. Synthesis, characterization, X-ray structure and DFT calculations of a bistridentate Co(III) complex based on the 2,6-bis(8′-quinolinyl)pyridine ligand. INORG CHEM COMMUN 2014. [DOI: 10.1016/j.inoche.2014.10.024] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Frenzel BA, Mergerdichian Z, Schumaker JE, Kuester CT, Hamaker CG, Hightower SE. Synthesis, structural characterization and spectroscopic properties of cobalt complexes with the 2,6-bis(8′-quinolinyl)pyridine ligand. Polyhedron 2014. [DOI: 10.1016/j.poly.2014.07.029] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Woodall EL, Simanis JA, Hamaker CG, Goodell JR, Mitchell TA. Unique Reactivity of anti- and syn-Acetoxypyranones en Route to Oxidopyrylium Intermediates Leading to a Cascade Process. Org Lett 2013; 15:3270-3. [DOI: 10.1021/ol4012986] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Erica L. Woodall
- Department of Chemistry, Illinois State University, Normal, Illinois 61790-4160, United States
| | - Justin A. Simanis
- Department of Chemistry, Illinois State University, Normal, Illinois 61790-4160, United States
| | - Christopher G. Hamaker
- Department of Chemistry, Illinois State University, Normal, Illinois 61790-4160, United States
| | - John R. Goodell
- Department of Chemistry, Illinois State University, Normal, Illinois 61790-4160, United States
| | - T. Andrew Mitchell
- Department of Chemistry, Illinois State University, Normal, Illinois 61790-4160, United States
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Goodman CA, Eagles JB, Rudahindwa L, Hamaker CG, Hitchcock SR. Synthesis, X-Ray Crystallography, and Reactions of N-Acyl and N-Carbamoyl Succinimides. SYNTHETIC COMMUN 2013. [DOI: 10.1080/00397911.2012.690061] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Cassie A. Goodman
- a Department of Chemistry , Illinois State University , Normal , Illinois , USA
| | - Joel B. Eagles
- a Department of Chemistry , Illinois State University , Normal , Illinois , USA
| | - Leandre Rudahindwa
- a Department of Chemistry , Illinois State University , Normal , Illinois , USA
| | | | - Shawn R. Hitchcock
- a Department of Chemistry , Illinois State University , Normal , Illinois , USA
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Losey DJ, Frenzel BA, Smith WM, Hightower SE, Hamaker CG. Tricarbonyl rhenium complex of 2,6-bis(8′-quinolinyl)pyridine: Synthesis, spectroscopic characterization, X-ray structure and DFT calculations. INORG CHEM COMMUN 2013. [DOI: 10.1016/j.inoche.2013.01.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Weddle CB, Steiger S, Hamaker CG, Ower GD, Mitchell C, Sakaluk SK, Hunt J. Cuticular hydrocarbons as a basis for chemosensory self-referencing in crickets: a potentially universal mechanism facilitating polyandry in insects. Ecol Lett 2012; 16:346-53. [PMID: 23279570 DOI: 10.1111/ele.12046] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2012] [Revised: 10/16/2012] [Accepted: 11/08/2012] [Indexed: 11/30/2022]
Abstract
Females of many species obtain benefits by mating polyandrously, and often prefer novel males over previous mates. However, how do females recognise previous mates, particularly in the face of cognitive constraints? Female crickets appear to have evolved a simple but effective solution: females imbue males with their own cuticular hydrocarbons (CHCs) at mating and utilise chemosensory self-referencing to recognise recent mates. Female CHC profiles exhibited significant additive genetic variation, demonstrating that genetically unique chemical cues are available to support chemosensory self-referencing. CHC profiles of males became more similar to those of females after mating, indicating physical transfer of CHCs between individuals during copulation. Experimental perfuming of males with female CHCs resulted in a female aversion to males bearing chemical cues similar to their own. Chemosensory self-referencing, therefore, could be a widespread mechanism by which females increase the diversity of their mating partners.
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Affiliation(s)
- Carie B Weddle
- Behavior, Ecology, Evolution and Systematics Section, School of Biological Sciences, Illinois State University, Normal, IL 61790-4120, USA
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Banerjee S, Camodeca AJ, Griffin GG, Hamaker CG, Hitchcock SR. Aromatic motifs in the design of Ephedra ligands for application in the asymmetric addition of diethylzinc to aldehydes and diphenylphosphinoylimines. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.tetasy.2010.02.026] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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22
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Jin G, Bierma TJ, Hamaker CG, Mucha R, Schola V, Stewart J, Wade C. Use of a whole-cell biocatalyst to produce biodiesel in a water-containing system. J Environ Sci Health A Tox Hazard Subst Environ Eng 2009; 44:21-28. [PMID: 19085591 DOI: 10.1080/10934520802515202] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
This study examined the use of a whole-cell biocatalyst to transesterify triglycerides, including high-Free Fatty Acid (FFA) waste greases, in a water-containing system. The whole-cell biocatalyst derived from Rhizopus oryzae (ATCC10260) was grown and reacted at room temperature without immobilization. The effectiveness of improving biodiesel yield through alteration of reaction temperature, additional alcohol, and additional transesterification reaction was also examined. Results showed that whole-cell biocatalyst was able to produce biodiesel with a yield of about 75% for virgin canola oil, 80% for waste vegetable oil and 55% for brown grease with a 72-hr transesterification reaction using no excess methanol. Elevating the reaction temperature to 35 degrees C significantly diminished the yield. An additional dose of methanol with another 24 hours of reaction time or a second 72-hr reaction resulted in biodiesel yield approaching 90% and only 3% residual glycerides (mono-, di- and tri-glycerides). These results suggest that whole-cell biocatalysts are able to transesterify waste oils or greases that are high in FFA and contain water. Brown (trap) grease and similar degraded or complex greases may be good candidates for further whole-cell biocatalyst research.
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Affiliation(s)
- Guang Jin
- Department of Health Sciences, Environmental Health Program, Illinois State University, Normal, Illinois, USA
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Hitchcock SR, Davis RA, Richmond DM, Dore DD, Kuschel SL, Vaughn JF, Wolfe JA, Hamaker CG, Casper DM, Dingle J. Synthesis, asymmetric aldol reactions, and x-ray crystallography of some oxadiazinanone derivatives. J Heterocycl Chem 2008. [DOI: 10.1002/jhet.5570450502] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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24
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Parrott RW, Hamaker CG, Hitchcock SR. Salicylaldehyde based oxazolidines as catalysts for the asymmetric addition of diethylzinc to aldehydes. J Heterocycl Chem 2008. [DOI: 10.1002/jhet.5570450336] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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25
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Jin G, Bierma TJ, Hamaker CG, Rhykerd R, Loftus LA. Producing biodiesel using whole-cell biocatalysts in separate hydrolysis and methanolysis reactions. J Environ Sci Health A Tox Hazard Subst Environ Eng 2008; 43:589-595. [PMID: 18393066 DOI: 10.1080/10934520801893576] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
This research examined the effect of using separate hydrolysis and methanolysis reactions for biodiesel production using a whole-cell biocatalysts derived from Rhizopus Oryzae (ATCC 10260). Biodiesel yield from separate hydrolysis and methanolysis was compared to transesterification reactions where both hydrolysis and methanolysis reactions occur in the same reactor. All reactions were conducted at room temperature. The effect of substituting ethanol for methanol was also studied. Separating the hydrolysis and methanolysis reactions did not significantly increase biodiesel yields; however, this approach successfully converted about 99% of triglycerides into fatty acid methyl esters (FAME) and free fatty acids (FFA). Use of ethanol in place of methanol did not significantly improve the biodiesel yield. However, there is evidence that ethanol may either esterify FFA more quickly than methanol, or result in a more stable ester. The best biodiesel yield was about 90% when a transesterification reaction using methanol was followed by one hydrolysis and one ethanolysis reaction; however, this is only slightly higher than the 88% biodiesel yield of two transesterification reactions in series (using methanol as alcohol).
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Affiliation(s)
- Guang Jin
- Environmental Health Program, Department of Health Sciences, Illinois State University, Normal, Illinois 61790, USA.
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26
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Dablemont C, Hamaker CG, Thouvenot R, Sojka Z, Che M, Maatta EA, Proust A. Cover Picture: Functionalization of Heteropolyanions—Osmium and Rhenium Nitrido Derivatives of Keggin- and Dawson-Type Polyoxotungstates: Synthesis, Characterization and Multinuclear (183W,15N) NMR, EPR, IR, and UV/Vis Fingerprints (Chem. Eur. J. 36/2006). Chemistry 2006. [DOI: 10.1002/chem.200690114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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27
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Dablemont C, Hamaker CG, Thouvenot R, Sojka Z, Che M, Maatta EA, Proust A. Functionalization of Heteropolyanions—Osmium and Rhenium Nitrido Derivatives of Keggin- and Dawson-Type Polyoxotungstates: Synthesis, Characterization and Multinuclear (183W,15N) NMR, EPR, IR, and UV/Vis Fingerprints. Chemistry 2006; 12:9150-60. [PMID: 17136778 DOI: 10.1002/chem.200600934] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Reaction of K(10)[alpha(2)-P(2)W(17)O(61)] or K(10)[alpha(1)-P(2)W(17)O(61)] or [Bu(4)N][OsCl(4)N] in a water/methanol mixture, and subsequent precipitation with (Bu(4)N)Br provided [alpha(2)-P(2)W(17)O(61){Os(VI)N}](7-) and [alpha(1)-P(2)W(17)O(61){Os(VI)N}](7-) Dawson structures as tetrabutylammonium salts. Reactions of [(Bu(4)N)(4)][alpha-H(3)PW(11)O(39)] with either [ReCl(3)(N(2)Ph(2))(PPh(3))(2)] or [Bu(4)N][ReCl(4)N] are alternatives to the synthesis of [(Bu(4)N)(4)][alpha-PW(11)O(39){Re(VI)N}]. (183)W and (15)N NMR, EPR, IR, and UV-visible spectroscopies and cyclic voltammetry have been used to characterize these compounds and the corresponding [(Bu(4)N)(4)][alpha-PW(11)O(39){Os(VI)N}] Keggin derivative.
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Affiliation(s)
- Céline Dablemont
- Université Pierre et Marie Curie-Paris6, Institut de Chimie Moléculaire FR 2769, Laboratoire de Chimie Inorganique et Matériaux Moléculaires UMR CNRS 7071, 4 Place Jussieu, Case 42, 75252 Paris Cedex 05, France
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28
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Halbach DP, Hamaker CG. Synthesis, characterization, and X-ray structural analysis of some half-sandwich ruthenium(II) arene complexes with new N,S-donor Schiff base ligands. J Organomet Chem 2006. [DOI: 10.1016/j.jorganchem.2006.04.017] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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29
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Hamaker CG, Halbach DP. Synthesis, structure, and characterization of some ruthenium arene complexes of N-(arylmethylene)-2-(methylthio)anilines and 2-(methylthio)aniline. Inorganica Chim Acta 2006. [DOI: 10.1016/j.ica.2005.06.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Wolf JR, Hamaker CG, Djukic JP, Kodadek T, Woo LK. Shape and stereoselective cyclopropanation of alkenes catalyzed by iron porphyrins. J Am Chem Soc 2002. [DOI: 10.1021/ja00141a011] [Citation(s) in RCA: 208] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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32
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Moore AR, Kwen H, Hamaker CG, Mohs TR, Beatty AM, Harmon B, Needham K, Maatta EA. New Classes of Functionalized Polyoxometalates: Organo-Nitrogen Derivatives of Lindqvist Systems. Nanostructure Science and Technology 2002. [DOI: 10.1007/0-306-47933-8_10] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Affiliation(s)
| | | | - L. Keith Woo
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111
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Hamaker CG, Djukic JP, Smith DA, Woo LK. Mechanism of Cyclopropanation Reactions Mediated by (5,10,15,20-Tetra-p-tolylporphyrinato)osmium(II) Complexes. Organometallics 2001. [DOI: 10.1021/om010787h] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Christopher G. Hamaker
- Department of Chemistry, Campus Box 4160, Illinois State University, Normal, Illinois 61790-4160, Laboratoire de Syntheses Metallo-induitesUMR 7513 CNRS, Universite Louis Pasteur, 4, rue Blaise Pascal, 67070 Strasbourg, France, Department of Chemistry, Goshen College, Goshen, Indiana 46526, and Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111
| | - Jean-Pierre Djukic
- Department of Chemistry, Campus Box 4160, Illinois State University, Normal, Illinois 61790-4160, Laboratoire de Syntheses Metallo-induitesUMR 7513 CNRS, Universite Louis Pasteur, 4, rue Blaise Pascal, 67070 Strasbourg, France, Department of Chemistry, Goshen College, Goshen, Indiana 46526, and Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111
| | - Daniel A. Smith
- Department of Chemistry, Campus Box 4160, Illinois State University, Normal, Illinois 61790-4160, Laboratoire de Syntheses Metallo-induitesUMR 7513 CNRS, Universite Louis Pasteur, 4, rue Blaise Pascal, 67070 Strasbourg, France, Department of Chemistry, Goshen College, Goshen, Indiana 46526, and Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111
| | - L. Keith Woo
- Department of Chemistry, Campus Box 4160, Illinois State University, Normal, Illinois 61790-4160, Laboratoire de Syntheses Metallo-induitesUMR 7513 CNRS, Universite Louis Pasteur, 4, rue Blaise Pascal, 67070 Strasbourg, France, Department of Chemistry, Goshen College, Goshen, Indiana 46526, and Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111
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