1
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Jung H, Kweon J, Suh JM, Lim MH, Kim D, Chang S. Mechanistic snapshots of rhodium-catalyzed acylnitrene transfer reactions. Science 2023:eadh8753. [PMID: 37471480 DOI: 10.1126/science.adh8753] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Accepted: 06/26/2023] [Indexed: 07/22/2023]
Abstract
Rhodium acylnitrene complexes are widely implicated in catalytic C-H amidation reactions but have eluded isolation and structural characterization. To overcome this challenge, we designed a chromophoric octahedral rhodium complex with a bidentate dioxazolone ligand, in which photoinduced metal-to-ligand charge transfer initiates catalytic C-H amidation. X-ray photocrystallographic analysis of the Rh-dioxazolone complex allowed structural elucidation of the targeted Rh-acylnitrenoid and provided firm evidence that the singlet nitrenoid species is primarily responsible for acylamino transfer reactions. We also monitored in crystallo reaction of a nucleophile with the in situ generated Rh-acylnitrenoid, providing a crystallographically traceable reaction system to capture mechanistic snapshots of nitrenoid transfer.
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Affiliation(s)
- Hoimin Jung
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, South Korea
| | - Jeonguk Kweon
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, South Korea
| | - Jong-Min Suh
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
| | - Mi Hee Lim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
| | - Dongwook Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, South Korea
| | - Sukbok Chang
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, South Korea
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2
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Rahman ML, Sarjadi MS, Sarkar SM, Walsh DJ, Hannan JJ. Poly(hydroxamic acid) resins and their applications. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2022.214727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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3
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Ishihara K, Shioiri T, Matsugi M. Synthesis of carbamoyl azides via the Lossen rearrangement utilizing diphenyl phosphorazidate. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.153727] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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4
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Jiang Y, Li M, Liu S, Li R, Zheng Y, Song W, Zheng N. Synthesis and application of thiocarbamates via thiol-dioxazolone modified Lossen rearrangement. Chem Commun (Camb) 2022; 58:12353-12356. [DOI: 10.1039/d2cc05198b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Thiocarbamates afforded from thiol-dioxazolone modified Lossen rearrangement under mild conditions were further applied to prepare polythiocarbamates with self-healing properties.
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Affiliation(s)
- Yu Jiang
- Department of Polymer Science & Materials, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, P. R. China
| | - Ming Li
- Department of Polymer Science & Materials, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, P. R. China
| | - Shuxin Liu
- Department of Polymer Science & Materials, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, P. R. China
| | - Rui Li
- Department of Polymer Science & Materials, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, P. R. China
| | - Yubin Zheng
- Department of Polymer Science & Materials, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, P. R. China
| | - Wangze Song
- Department of Polymer Science & Materials, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, P. R. China
| | - Nan Zheng
- Department of Polymer Science & Materials, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, P. R. China
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5
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Kijewska M, Sharfalddin AA, Jaremko Ł, Cal M, Setner B, Siczek M, Stefanowicz P, Hussien MA, Emwas AH, Jaremko M. Lossen Rearrangement of p-Toluenesulfonates of N-Oxyimides in Basic Condition, Theoretical Study, and Molecular Docking. Front Chem 2021; 9:662533. [PMID: 33937199 PMCID: PMC8082858 DOI: 10.3389/fchem.2021.662533] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Accepted: 03/12/2021] [Indexed: 11/13/2022] Open
Abstract
The sulfonic esters of N-oxyimides are a group of compounds with a wide range of biological activities, as well as a unique reactivity toward amines. They undergo this reaction with primary amines and other nucleophilic reagents according to a Lossen-like rearrangement. The reaction is initiated by nucleophilic attack on a carbonyl group in the succinimide ring followed by isocyanate formation, which next interacts with another nucleophile molecule forming an addition product (e.g., ureido or urethane derivative). However, the secondary amines are also susceptible to other reactions leading to products containing the maleimide ring formed by sulphonic acid elimination. In the case of tertiary amines, this reaction is predominant. To explain the phenomenon of the reactivity of the N- oxyimides toward different types of amines, we employed various spectroscopic and X-ray approaches as well as DFT calculation. Results suggest that the basicity of the amine used for the reaction plays a crucial role in the reaction mechanism that eventually dominates the entire chemical process. Moreover, we applied molecular docking to investigate the ability of the products to act as serine protease inhibitors using human leukocyte elastase (HLE).
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Affiliation(s)
- Monika Kijewska
- Faculty of Chemistry, University of Wrocław, Wrocław, Poland
| | - Abeer A. Sharfalddin
- Department of Chemistry, Faculty of Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Łukasz Jaremko
- Division of Biological and Environmental Sciences and Engineering, King Abdullah University of Science and Technology, Jeddah, Saudi Arabia
| | - Marta Cal
- Faculty of Chemistry, University of Wrocław, Wrocław, Poland
| | - Bartosz Setner
- Faculty of Chemistry, University of Wrocław, Wrocław, Poland
| | - Miłosz Siczek
- Faculty of Chemistry, University of Wrocław, Wrocław, Poland
| | | | - Mostafa A. Hussien
- Department of Chemistry, Faculty of Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
- Department of Chemistry Faculty of Science, Port Said University, Port Said, Egypt
| | - Abdul-Hamid Emwas
- Core Labs, King Abdullah University of Science and Technology (KAUST), Jeddah, Saudi Arabia
| | - Mariusz Jaremko
- Division of Biological and Environmental Sciences and Engineering, King Abdullah University of Science and Technology, Jeddah, Saudi Arabia
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6
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Bhagat SD, Chanchal A, Gujrati M, Banerjee A, Mishra RK, Srivastava A. Implantable HDAC-inhibiting chemotherapeutics derived from hydrophobic amino acids for localized anticancer therapy. Biomater Sci 2021; 9:261-271. [PMID: 33196720 DOI: 10.1039/d0bm01417f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Epigenetic targeting of different cancers by inhibiting particular histone deacetylase (HDAC) isozymes is a promising treatment approach against cancer. Development of locally-implantable molecular inhibitors of HDAC (henceforth called HDACi) promises high tumour site concentration and reduced systemic degradation of the HDACi. Herein, we report the design of such implantable HDACi based on amphiphilic derivatives of hydrophobic amino acids endowed with a hydroxamic acid (hxa)-based zinc-binding residue. The amino acids present in HDACi influenced the HDAC isozyme that could be inhibited most effectively; the l-phenylalanine derivative 4e inhibited the HDAC6 isozyme most potently (IC50 ∼ 88 nM), while the l-isoleucine derivative 4h was most effective against the isozyme HDAC2 (IC50 ∼ 94 nM). We also noticed that the l-Phe derivative 4e was up to 5× more potent towards inhibiting HDAC6 than its optical antipode 4f derived from d-Phe. This was rationalized in terms of the varying extent of penetration of the enantiomeric inhibitors inside the catalytic tunnel of the enzyme. Since the isozymes HDAC6 and HDAC2 are overexpressed in different cancer cells, 4e and 4h elicited selective anticancer activity in different cancer cell lines. Additive therapeutic action of the combination therapy of 4e and 4h was observed on lung cancer cells that overexpress both these isozymes. Further, 4e formed implantable self-assembled hydrogels that achieved sustained and selective killing of cancer cells in the vicinity of implantation.
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Affiliation(s)
- Somnath Dharmaraj Bhagat
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhopal, Madhya Pradesh 462066, India.
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7
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Kannan N, Patil AR, Sinha A. Direct C-H bond halogenation and pseudohalogenation of hydrocarbons mediated by high-valent 3d metal-oxo species. Dalton Trans 2020; 49:14344-14360. [PMID: 33057538 DOI: 10.1039/d0dt02533j] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Late-stage direct functionalization of the C-H bond is synthetically desirable. Metalloenzymes having metal-oxo active sites are well known to selectively catalyze hydroxylation and halogenation reactions with high efficiency. This review highlights the recent developments in the field of direct C-H halogenation and pseudohalogenation reactions catalyzed by the functional models of metalloenzymes.
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Affiliation(s)
- Neppoliyan Kannan
- Department of Chemistry, School of Advanced Science, Vellore Institute of Technology, Vellore-632014, Tamil Nadu, India.
| | - Akshay R Patil
- Department of Chemistry, School of Advanced Science, Vellore Institute of Technology, Vellore-632014, Tamil Nadu, India.
| | - Arup Sinha
- Department of Chemistry, School of Advanced Science, Vellore Institute of Technology, Vellore-632014, Tamil Nadu, India.
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8
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Richaud AD, Roche SP. Structure-Property Relationship Study of N-(Hydroxy)Peptides for the Design of Self-Assembled Parallel β-Sheets. J Org Chem 2020; 85:12329-12342. [PMID: 32881524 DOI: 10.1021/acs.joc.0c01441] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
The design of novel and functional biomimetic foldamers remains a major challenge in creating mimics of native protein structures. Herein, we report the stabilization of a remarkably short β-sheet by incorporating N-(hydroxy)glycine (Hyg) residues into the backbone of peptides. These peptide-peptoid hybrids form unique parallel β-sheet structures by self-assembly upon hydrogenation. Our spectroscopic and crystallographic data suggest that the local conformational perturbations induced by N-(hydroxy)amides are outweighed by a network of strong interstrand hydrogen bonds.
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Affiliation(s)
- Alexis D Richaud
- Department of Chemistry and Biochemistry, Florida Atlantic University, Boca Raton, Florida 33431, United States
| | - Stéphane P Roche
- Department of Chemistry and Biochemistry, Florida Atlantic University, Boca Raton, Florida 33431, United States.,Center for Molecular Biology and Biotechnology, Florida Atlantic University, Jupiter, Florida 33458, United States
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9
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Derasp JS, Barbera EA, Séguin NR, Brzezinski DD, Beauchemin AM. Synthesis of Hydroxamic Acid Derivatives Using Blocked (Masked) O-Isocyanate Precursors. Org Lett 2020; 22:7403-7407. [PMID: 32880464 DOI: 10.1021/acs.orglett.0c02782] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Hydroxamic acids are present in a several pharmaceuticals and agrochemicals. Synthetic strategies providing access to hydroxamic acid derivatives remain limited, typically requiring the use of nucleophilic hydroxylamine reagents. Herein, a synthesis of hydroxamates from unactivated carboxylic acids is reported making use of rare blocked (masked) O-substituted isocyanates. The applicability of this transformation was highlighted by targeting the synthesis of vorinostat and belinostat derivatives.
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Affiliation(s)
- Joshua S Derasp
- Centre for Catalysis Research and Innovation, Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie-Curie, Ottawa, Ontario K1N 6N5, Canada
| | - Erica A Barbera
- Centre for Catalysis Research and Innovation, Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie-Curie, Ottawa, Ontario K1N 6N5, Canada
| | - Niève R Séguin
- Centre for Catalysis Research and Innovation, Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie-Curie, Ottawa, Ontario K1N 6N5, Canada
| | - David D Brzezinski
- Centre for Catalysis Research and Innovation, Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie-Curie, Ottawa, Ontario K1N 6N5, Canada
| | - André M Beauchemin
- Centre for Catalysis Research and Innovation, Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie-Curie, Ottawa, Ontario K1N 6N5, Canada
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10
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Filippi L, Meier MAR. Fully Renewable Non-Isocyanate Polyurethanes via the Lossen Rearrangement. Macromol Rapid Commun 2020; 42:e2000440. [PMID: 32935889 DOI: 10.1002/marc.202000440] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 08/31/2020] [Indexed: 12/18/2022]
Abstract
In this work, a straightforward and efficient synthesis approach to renewable non-isocyanate polyurethanes (NIPUs) is described. For this purpose, suitable and renewable carbamate monomers, possessing two double bonds, are synthesized from hydroxamic fatty acid derivatives via the Lossen rearrangement in a one-step synthesis, and sustainable dithiols are synthesized from dialkenes derived from renewable feedstock (i.e., limonene and 1,4-cyclohexadiene). Subsequently, the comonomers are polymerized with the highly efficient thiol-ene reaction to produce NIPUs with Mn values up to 26 kg mol-1 bearing thioether linkages. The main side product of the Lossen rearrangement, a symmetric urea, can also be polymerized in the same fashion. Important in the view of sustainability, the monomer mixture can also be used directly, without separation. The obtained polymers are characterized by NMR, attenuated total reflection-infrared spectroscopy, differential scanning calorimetry, and size exclusion chromatography.
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Affiliation(s)
- Luca Filippi
- Karlsruhe Institute of Technology (KIT), Institute for Biological and Chemical Systems - Functional Molecular Systems (IBCS-FMS), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Michael A R Meier
- Karlsruhe Institute of Technology (KIT), Institute for Biological and Chemical Systems - Functional Molecular Systems (IBCS-FMS), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany.,Karlsruhe Institute of Technology (KIT), Institute of Organic Chemistry (IOC), Materialwissenschaftliches Zentrum (MZE), Straße am Forum 7, 76131, Karlsruhe, Germany
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11
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Dindarloo Inaloo I, Esmaeilpour M, Majnooni S, Reza Oveisi A. Nickel‐Catalyzed Synthesis of
N
‐(Hetero)aryl Carbamates from Cyanate Salts and Phenols Activated with Cyanuric Chloride. ChemCatChem 2020. [DOI: 10.1002/cctc.202000876] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
| | - Mohsen Esmaeilpour
- Chemistry Department College of Sciences Shiraz University Shiraz 71946 84795 Iran
- Chemistry and Process Engineering Department Niroo Research Institute Tehran 1468617151 Iran
| | - Sahar Majnooni
- Chemistry Department University of Isfahan Isfahan 81746-73441 Iran
| | - Ali Reza Oveisi
- Department of Chemistry Faculty of Sciences University of Zabol Zabol 98615-538 Iran
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12
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Keth J, Johann T, Frey H. Hydroxamic Acid: An Underrated Moiety? Marrying Bioinorganic Chemistry and Polymer Science. Biomacromolecules 2020; 21:2546-2556. [PMID: 32525665 DOI: 10.1021/acs.biomac.0c00449] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Even 150 years after their discovery, hydroxamic acids are mainly known as the starting material for the Lossen rearrangement in textbooks. However, hydroxamic acids feature a plethora of existing and potential applications ranging from medical purposes to materials science, based on their excellent complexation properties. This underrated functional moiety can undergo a broad variety of organic transformations and possesses unique coordination properties for a large variety of metal ions, for example, Fe(III), Zn(II), Mn(II), and Cr(III). This renders it ideal for biomedical applications in the field of metal-associated diseases or the inhibition of metalloenzymes, as well as for the separation of metals. Considering their chemical stability and reactivity, their biological origin and both medical and industrial applications, this Perspective aims at highlighting hydroxamic acids as highly promising chelators in the fields of both medical and materials science. Furthermore, the state of the art in combining hydroxamic acids with a variety of polymer structures is discussed and a perspective regarding their vast potential at the interface of bioinorganic and polymer chemistry is given.
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Affiliation(s)
- Jennifer Keth
- Department of Chemistry, Johannes Gutenberg University Mainz, Duesbergweg 10-14, D-55124 Mainz, Germany
| | - Tobias Johann
- Department of Chemistry, Johannes Gutenberg University Mainz, Duesbergweg 10-14, D-55124 Mainz, Germany
| | - Holger Frey
- Department of Chemistry, Johannes Gutenberg University Mainz, Duesbergweg 10-14, D-55124 Mainz, Germany
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13
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Priya B, Kumar A, Sharma N. Synthesis, characterization, and biological properties of oxidovanadium(IV) complexes of acetylsalicylhydroxamic acid ( N-acetyloxy-2-hydroxybenzamide) as potential antimicrobials. JOURNAL OF CHEMICAL RESEARCH 2020. [DOI: 10.1177/1747519820907563] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
New oxidovanadium(IV) complexes of composition [VO(AcSHA)2] 1 and [VO(acac)(AcSHA)] 2 are synthesized by reactions of VOSO4.5H2O and [VO(acac)2] with acetylsalicylhydroxamic acid AcSH2A (C6H4(OH)(CONHOCOCH3)) in a 1:2 molar ratio in absolute ethanol. The compounds are characterized by the Fourier-transform infrared spectroscopy, ultraviolet–visible spectroscopy, electron spin resonance, and mass spectrometry along with elemental analyses, molar conductivity, and magnetic moment measurements. The infrared spectra of the complexes suggest bonding through carbonyl and phenolic oxygen atoms (O,O coordination). The magnetic moment, electron spin resonance, and mass spectra of the complexes indicate that both exist as monomers, and a distorted square pyramidal geometry around vanadium is proposed. The thermal behavior of the complexes is studied by thermogravimetry and differential thermal analysis techniques under an N2 atmosphere, yielding VO2 as the decomposition product. The in vitro antimicrobial assays against pathogenic Gram-positive bacteria, Gram-negative bacteria, and fungi (minimum inhibitory concentration method) show the appreciable antimicrobial potential relative to the respective standard drugs, tetracycline hydrochloride, and fluconazole.
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Affiliation(s)
- Bhanu Priya
- Department of Chemistry, Himachal Pradesh University, Shimla, India
| | - Abhishek Kumar
- Department of Chemistry, Himachal Pradesh University, Shimla, India
| | - Neeraj Sharma
- Department of Chemistry, Himachal Pradesh University, Shimla, India
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14
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Priya B, Kumar A, Sharma N. Synthesis, Characterisation, and Biological Properties of Oxidovanadium(IV) 3,5-Dinitrosalicylhydroxamate Complexes. Aust J Chem 2020. [DOI: 10.1071/ch19486] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The new oxidovanadium(iv) complexes of composition [VO(3,5(NO2)2C6H2(OH)CONHO)2] 1 and [VO(acac)(3,5(NO2)2C6H2(OH)CONHO)] 2 (where acac=(CH3COCHCOCH3)–] have been synthesised by the reactions of VOSO4·5H2O and [VO(acac)2] with potassium 3,5-dinitrosalicylhydroxamate (3,5-(NO2)2SHK) and characterised by elemental analyses, molar conductivity, magnetic moment measurements and FT-IR, UV-vis, and electron spin resonance (ESR) spectroscopies and mass spectrometry. Infrared spectra of complexes have indicated bonding through oxygen atoms of carbonyl and hydroxamic groups (O,O coordination). The magnetic moment, ESR, and mass spectra of the complexes suggested their monomeric nature, and a distorted square-pyramidal geometry around the vanadium has tentatively been proposed. The electrochemical behaviour of 1 and 2 has been studied by cyclic voltammetry. Thermal behaviour of the complexes studied by thermogravimetric and differential thermal analysis techniques has yielded VO2 as the decomposition product. The invitro antimicrobial activity of the ligand and complexes has been assayed against pathogenic bacteria and fungi by the minimum inhibitory concentration (MIC) method. The invitro antioxidant activity of the complexes has been determined by 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical scavenging method.
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15
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Wei Z, Hu Y, Han H, Sun W. Configurations of lead(II)-benzohydroxamic acid complexes in colloid and interface: A new perspective. J Colloid Interface Sci 2019; 562:342-351. [PMID: 31855797 DOI: 10.1016/j.jcis.2019.11.115] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 11/27/2019] [Accepted: 11/28/2019] [Indexed: 10/25/2022]
Abstract
Lead(II)-benzohydroxamic acid (Pb-BHA) complex collectors perform well with respect to scheelite flotation, and, due to their structure, they are widely used for industrial purposes. This paper examines the controversial issue of whether "O, O" five-membered ring or "N, O" four-membered ring complexes are formed when BHA coordinates with Pb ions, with their structure being comprehensively studied from the aspect of colloid and interface science. The configurations of Pb-BHA complexes are examined in a solution and on a mineral surface with experimental and computational methods. Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and density functional theory (DFT) revealed that the five-membered ring is the dominant form of Pb-BHA complexes in a solution, whereas four-membered ring complexes are the stronger electron acceptor of the two. Moreover, XPS and time-of-flight secondary ion mass spectrometry (TOF-SIMS) confirmed that the four-membered ring complexes are stable with respect to being adsorbed on the scheelite surface. Therefore, although the four-membered ring is not as stable as the five-membered ring in a solution, it offers advantages with respect to adsorption on an electron-rich mineral surface during short-flotation processes.
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Affiliation(s)
- Zhao Wei
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Hunan Province for Clean and Efficient Utilization of Strategic Calcium-containing Mineral Resources, Central South University, Changsha 410083, China
| | - Yuehua Hu
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Hunan Province for Clean and Efficient Utilization of Strategic Calcium-containing Mineral Resources, Central South University, Changsha 410083, China
| | - Haisheng Han
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Hunan Province for Clean and Efficient Utilization of Strategic Calcium-containing Mineral Resources, Central South University, Changsha 410083, China.
| | - Wei Sun
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Hunan Province for Clean and Efficient Utilization of Strategic Calcium-containing Mineral Resources, Central South University, Changsha 410083, China.
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16
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Johann T, Keth J, Bros M, Frey H. A general concept for the introduction of hydroxamic acids into polymers. Chem Sci 2019; 10:7009-7022. [PMID: 31588268 PMCID: PMC6676332 DOI: 10.1039/c9sc02557j] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2019] [Accepted: 06/04/2019] [Indexed: 12/28/2022] Open
Abstract
Polyethers (PEG) with hydroxamic acid groups enable chelation of a variety of metal ions, coating of metal oxide surfaces and stabilization of nanoparticles. In contrast to catechol, hydroxamic acids are oxidation stable and biocompatible.
Hydroxamic acids (HA) form stable complexes with a large variety of metal-ions, affording hydroxamates with high complexation constants. Hydroxamic acid moieties play a crucial role in the natural iron metabolism. In this work, 1,4,2-dioxazoles linked to a hydroxyl group are introduced as key compounds for the installation of hydroxamic acids at synthetic polymers in well-defined positions. A general synthetic scheme is developed that gives access to a series of novel functional key building blocks that can be universally used to obtain hydroxamic acid-based monomers and polymers, for instance as protected HA-functional initiators or for the synthesis of a variety of novel HA-based monomers, such as epoxides or methacrylates. To demonstrate the excellent stability of the dioxazole-protected hydroxamic acids, direct incorporation of the dioxazole-protected hydroxamic acids into polyethers is demonstrated via oxyanionic polymerization. Convenient subsequent deprotection is feasible under mild acidic conditions. α-Functional HA-polyethers, i.e. poly ethylene glycol, polypropylene glycol and polyglycerol based on ethylene oxide, propylene oxide and ethoxy ethyl glycidyl ether, respectively are prepared with low dispersities (<1.2) in the molecular weight range of 1000 to 8500 g mol–1. Water-soluble hydroxamic acid functional poly(ethylene glycol) (HA-PEG) is explored for a variety of biomedical applications and surface coating. Complexation of Fe(iii) ions, coating of various metal surfaces, enabling e.g., solubilization of FeOx nanoparticles by HA-PEGs, are presented. No impact of the polyether chain on the chelation properties was observed, while significantly lower anti-proliferative effects were observed than for deferoxamine. HA-PEGs show the same complexation behavior as their low molecular weight counterparts. Hydroxamic acid functional polymers are proposed as an oxidatively stable alternative to the highly established catechol-based systems.
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Affiliation(s)
- Tobias Johann
- Institute of Organic Chemistry , Johannes Gutenberg University , Duesbergweg 10-14 , 55128 Mainz , Germany .
| | - Jennifer Keth
- Institute of Organic Chemistry , Johannes Gutenberg University , Duesbergweg 10-14 , 55128 Mainz , Germany .
| | - Matthias Bros
- Department of Dermatology , University Medical Center of the Johannes Gutenberg University Mainz , Langenbeckstrasse 1 , 55131 Mainz , Germany
| | - Holger Frey
- Institute of Organic Chemistry , Johannes Gutenberg University , Duesbergweg 10-14 , 55128 Mainz , Germany .
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17
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Johann T, Kemmer‐Jonas U, Barent RD, Frey H. Multifunctional Fe(III)‐Binding Polyethers from Hydroxamic Acid‐Based Epoxide Monomers. Macromol Rapid Commun 2019; 41:e1900282. [DOI: 10.1002/marc.201900282] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Revised: 07/12/2019] [Indexed: 12/27/2022]
Affiliation(s)
- Tobias Johann
- Institute of Organic Chemistry, Johannes Gutenberg University Duesbergweg 10–14 55128 Mainz Germany
| | - Ulrike Kemmer‐Jonas
- Institute of Organic Chemistry, Johannes Gutenberg University Duesbergweg 10–14 55128 Mainz Germany
| | - Ramona D. Barent
- Institute of Organic Chemistry, Johannes Gutenberg University Duesbergweg 10–14 55128 Mainz Germany
| | - Holger Frey
- Institute of Organic Chemistry, Johannes Gutenberg University Duesbergweg 10–14 55128 Mainz Germany
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18
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Li S, Khan R, Zhang X, Yang Y, Wang Z, Zhan Y, Dai Y, Liu YE, Fan B. One stone two birds: cobalt-catalyzed in situ generation of isocyanates and benzyl alcohols for the synthesis of N-aryl carbamates. Org Biomol Chem 2019; 17:5891-5896. [PMID: 31166354 DOI: 10.1039/c9ob00924h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
An efficient method for the synthesis of N-aryl carbamates from N-Boc-protected amines has been developed. The cobalt-catalyzed in situ generation of isocyanates from N-Boc-protected amines and benzyl alcohols from benzyl formates has been achieved for the first time, which in turn furnished the corresponding benzyl carbamates in moderate to high yields. The reaction was catalyzed by CoI2 with tris-(4-dimethylaminophenyl)-phosphine as the ligand and zinc powder as the reductant. The developed reaction conditions were found to be compatible for aromatic amines with both electron-donating and -withdrawing substituents.
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Affiliation(s)
- Sida Li
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, Yunnan Minzu University, Kunming 650500, China.
| | - Ruhima Khan
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, Yunnan Minzu University, Kunming 650500, China.
| | - Xia Zhang
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, Yunnan Minzu University, Kunming 650500, China.
| | - Yong Yang
- Chongqing Academy of Chinese Materia Medica, Chongqing, 400065, China.
| | - Zheting Wang
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, Yunnan Minzu University, Kunming 650500, China.
| | - Yong Zhan
- Chongqing Academy of Chinese Materia Medica, Chongqing, 400065, China.
| | - Yuze Dai
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, Yunnan Minzu University, Kunming 650500, China.
| | - Yue-E Liu
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, Yunnan Minzu University, Kunming 650500, China.
| | - Baomin Fan
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, Yunnan Minzu University, Kunming 650500, China.
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19
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Jia M, Zhang H, Lin Y, Chen D, Chen Y, Xia Y. Consecutive Lossen rearrangement/transamidation reaction of hydroxamic acids under catalyst- and additive-free conditions. Org Biomol Chem 2019; 16:3615-3624. [PMID: 29708257 DOI: 10.1039/c8ob00490k] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The Lossen rearrangement is a classic process for transforming activated hydroxamic acids into isocyanate under basic or thermal conditions. In the current report we disclosed a consecutive Lossen rearrangement/transamidation reaction in which unactivated hydroxamic acids were converted into N-substituted formamides in a one-pot manner under catalyst- and additive-free conditions. One feature of this novel transformation is that the formamide plays triple roles in the reaction by acting as a readily available solvent, a promoter for additive-free Lossen rearrangement, and a source of the formyl group in the final products. Acyl groups other than formyl could also be introduced into the product when changing the solvent to other low molecular weight aliphatic amide derivatives. The solvent-promoted Lossen rearrangement was better understood by DFT calculations, and the intermediacy of isocyanate and amine was supported well by experiments, in which the desired products were obtained in excellent yields under similar conditions. Not only monosubstituted formamides were synthesized from hydroxamic acids, but also N,N-disubstituted formamides were obtained when secondary amines were used as precursors.
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Affiliation(s)
- Mengmeng Jia
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China.
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20
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Li J, Wang S, Zou S, Huang H. Palladium-catalyzed relay hydroaminocarbonylation of alkenes with hydroxylamine hydrochloride as an ammonia equivalent. Commun Chem 2019. [DOI: 10.1038/s42004-019-0108-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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21
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Zhou D, Wang P, Long Y, Fei Y, Deng Y. Recovery of the polymers formed during thermal cracking of N-substituted dicarbamates over Fe–Ni/Al2O3. Catal Sci Technol 2019. [DOI: 10.1039/c9cy00031c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Regenerated carbamate from the thermal cracking polymers via the alcoholysis reaction in the presence of ethyl carbamate.
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Affiliation(s)
- Dawei Zhou
- State Key Laboratory for Oxo Synthesis and Selective Oxidation
- State Key Laboratory of Solid Lubrication
- Centre for Green Chemistry and Catalysis
- Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences
- Lanzhou
| | - Peixue Wang
- State Key Laboratory for Oxo Synthesis and Selective Oxidation
- State Key Laboratory of Solid Lubrication
- Centre for Green Chemistry and Catalysis
- Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences
- Lanzhou
| | - Yan Long
- State Key Laboratory for Oxo Synthesis and Selective Oxidation
- State Key Laboratory of Solid Lubrication
- Centre for Green Chemistry and Catalysis
- Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences
- Lanzhou
| | - Yuqing Fei
- State Key Laboratory for Oxo Synthesis and Selective Oxidation
- State Key Laboratory of Solid Lubrication
- Centre for Green Chemistry and Catalysis
- Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences
- Lanzhou
| | - Youquan Deng
- State Key Laboratory for Oxo Synthesis and Selective Oxidation
- State Key Laboratory of Solid Lubrication
- Centre for Green Chemistry and Catalysis
- Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences
- Lanzhou
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22
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Terent'ev AO, Mulina OM, Parshin VD, Kokorekin VA, Nikishin GI. Electrochemically induced oxidative S–O coupling: synthesis of sulfonates from sulfonyl hydrazides and N-hydroxyimides or N-hydroxybenzotriazoles. Org Biomol Chem 2019; 17:3482-3488. [DOI: 10.1039/c8ob03162b] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A variety of sulfonates were synthesized from sulfonyl hydrazides and N-hydroxy compounds via electrochemically induced oxidative S–O bond formation.
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Affiliation(s)
- Alexander O. Terent'ev
- N.D. Zelinsky Institute of Organic Chemistry
- Russian Academy of Sciences
- Moscow
- Russian Federation
- D.I. Mendeleev University of Chemical Technology of Russia
| | - Olga M. Mulina
- N.D. Zelinsky Institute of Organic Chemistry
- Russian Academy of Sciences
- Moscow
- Russian Federation
| | - Vadim D. Parshin
- D.I. Mendeleev University of Chemical Technology of Russia
- Moscow
- Russian Federation
| | - Vladimir A. Kokorekin
- N.D. Zelinsky Institute of Organic Chemistry
- Russian Academy of Sciences
- Moscow
- Russian Federation
- Sechenov First Moscow State Medical University
| | - Gennady I. Nikishin
- N.D. Zelinsky Institute of Organic Chemistry
- Russian Academy of Sciences
- Moscow
- Russian Federation
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23
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Thomas M, Alsarraf J, Araji N, Tranoy-Opalinski I, Renoux B, Papot S. The Lossen rearrangement from free hydroxamic acids. Org Biomol Chem 2019; 17:5420-5427. [DOI: 10.1039/c9ob00789j] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
During more than a century, the Lossen rearrangement was supposed to occur exclusively in the presence of stochiometric amount of activating reagents. Very recently, it was demonstrated that the Lossen rearrangement can take place directly from free hydroxamic acids offering a renewal of interest for this reaction.
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Affiliation(s)
- Mikaël Thomas
- Université de Poitiers
- UMR-CNRS 7285
- Institut de Chimie des Milieux et des Matériaux de Poitiers (IC2MP)
- Groupe Systèmes Moléculaires Programmés
- 86073 Poitiers
| | - Jérôme Alsarraf
- Chaire de recherche sur les agents anticancéreux d'origine naturelle
- Laboratoire d'analyse et de séparation des essences végétales (LASEVE)
- Département des Sciences Fondamentales
- Université du Québec à Chicoutimi
- Chicoutimi
| | - Nahla Araji
- Université de Poitiers
- UMR-CNRS 7285
- Institut de Chimie des Milieux et des Matériaux de Poitiers (IC2MP)
- Groupe Systèmes Moléculaires Programmés
- 86073 Poitiers
| | - Isabelle Tranoy-Opalinski
- Université de Poitiers
- UMR-CNRS 7285
- Institut de Chimie des Milieux et des Matériaux de Poitiers (IC2MP)
- Groupe Systèmes Moléculaires Programmés
- 86073 Poitiers
| | - Brigitte Renoux
- Université de Poitiers
- UMR-CNRS 7285
- Institut de Chimie des Milieux et des Matériaux de Poitiers (IC2MP)
- Groupe Systèmes Moléculaires Programmés
- 86073 Poitiers
| | - Sébastien Papot
- Université de Poitiers
- UMR-CNRS 7285
- Institut de Chimie des Milieux et des Matériaux de Poitiers (IC2MP)
- Groupe Systèmes Moléculaires Programmés
- 86073 Poitiers
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24
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Sockwell AK, Wetzler M. Beyond Biological Chelation: Coordination of f‐Block Elements by Polyhydroxamate Ligands. Chemistry 2018; 25:2380-2388. [DOI: 10.1002/chem.201803176] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Indexed: 11/10/2022]
Affiliation(s)
- A. Kirstin Sockwell
- Clemson UniversityChemistry Department Address 211 S Palmetto Blvd Clemson SC 29634 USA
| | - Modi Wetzler
- Clemson UniversityChemistry Department Address 211 S Palmetto Blvd Clemson SC 29634 USA
- Clemson UniversityNuclear Environmental Engineering, Sciences and Radioactive Waste Management Address 342 Computer Ct Anderson SC 29625 USA
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25
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Ghosh AK, Sarkar A, Brindisi M. The Curtius rearrangement: mechanistic insight and recent applications in natural product syntheses. Org Biomol Chem 2018; 16:2006-2027. [PMID: 29479624 PMCID: PMC5864567 DOI: 10.1039/c8ob00138c] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The Curtius rearrangement is a versatile reaction in which a carboxylic acid can be converted to an isocyanate through an acyl azide intermediate under mild conditions. The resulting stable isocyanate can then be readily transformed into a variety of amines and amine derivatives including urethanes and ureas. There have been wide-ranging applications of the Curtius rearrangement in the synthesis of natural products and their derivatives. Also, this reaction has been extensively utilized in the synthesis and application of a variety of biomolecules. In this review, we present mechanistic studies, chemical methodologies and reagents for the synthesis of isocyanates from carboxylic acids, the conversion of isocyanates to amines and amine derivatives, and their applications in the synthesis of bioactive natural products and their congeners.
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Affiliation(s)
- Arun K Ghosh
- Department of Chemistry and Department of Medicinal Chemistry, Purdue University, West Lafayette, Indiana 47907, USA.
| | - Anindya Sarkar
- Department of Chemistry and Department of Medicinal Chemistry, Purdue University, West Lafayette, Indiana 47907, USA.
| | - Margherita Brindisi
- Department of Chemistry and Department of Medicinal Chemistry, Purdue University, West Lafayette, Indiana 47907, USA.
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26
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Abstract
The facile rearrangement of "S-acyl isopeptides" to native peptide bonds via S,N-acyl shift is central to the success of native chemical ligation, the widely used approach for protein total synthesis. Proximity-driven amide bond formation via acyl transfer reactions in other contexts has proven generally less effective. Here, we show that under neutral aqueous conditions, "O-acyl isopeptides" derived from hydroxy-asparagine [aspartic acid-β-hydroxamic acid; Asp(β-HA)] rearrange to form native peptide bonds via an O,N-acyl shift. This process constitutes a rare example of an O,N-acyl shift that proceeds rapidly across a medium-size ring (t1/2 ∼ 15 min), and takes place in water with minimal interference from hydrolysis. In contrast to serine/threonine or tyrosine, which form O-acyl isopeptides only by the use of highly activated acyl donors and appropriate protecting groups in organic solvent, Asp(β-HA) is sufficiently reactive to form O-acyl isopeptides by treatment with an unprotected peptide-αthioester, at low mM concentration, in water. These findings were applied to an acyl transfer-based chemical ligation strategy, in which an unprotected N-terminal Asp(β-HA)-peptide and peptide-αthioester react under aqueous conditions to give a ligation product ultimately linked by a native peptide bond.
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27
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Aricò F, Maranzana A, Musolino M, Tundo P. 5-Membered cyclic ethers via phenonium ion mediated cyclization through carbonate chemistry. PURE APPL CHEM 2018. [DOI: 10.1515/pac-2017-0604] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Cyclization of 2-(2-hydroxyethyl)phenol via DMC chemistry in acidic conditions is herein discussed for the first time. Reaction conditions have been investigated and optimized. This substrate is quite appealing as it incorporates a 2-hydroxyethyl moiety in ortho to the aromatic hydroxyl group capable of stabilizing the related phenonium ion. When the reaction mechanism was investigated via theoretical calculations, the results suggest that the most favorable pathway encompasses a DMC-mediated formation of the phenonium ion that is converted into the 2-(2-methoxyethyl)phenol. The related cyclic ether is then formed via intramolecular cyclization of this intermediate. This peculiar cyclization reaction is another example of the versatility of DMC herein used as solvent, methoxycarbonylation agent and leaving group in the intramolecular cyclization leading to the phenonium ion.
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Affiliation(s)
- Fabio Aricò
- Department of Environmental Science, Informatics and Statistics , Ca’ Foscari University , Scientific Campus Via Torino 155 , 30172 Venezia Mestre , Italy
| | - Andrea Maranzana
- Department of Chemistry , Turin University , Via Pietro Giuria, 7 , 10125 Torino , Italy
| | - Manuele Musolino
- Department of Environmental Science, Informatics and Statistics , Ca’ Foscari University , Scientific Campus Via Torino 155 , 30172 Venezia Mestre , Italy
| | - Pietro Tundo
- Department of Environmental Science, Informatics and Statistics , Ca’ Foscari University , Scientific Campus Via Torino 155 , 30172 Venezia Mestre , Italy
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28
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Wang Q, An J, Alper H, Xiao WJ, Beauchemin AM. Catalytic substitution/cyclization sequences of O-substituted Isocyanates: synthesis of 1-alkoxybenzimidazolones and 1-alkoxy-3,4-dihydroquinazolin-2(1H)-ones. Chem Commun (Camb) 2017; 53:13055-13058. [PMID: 29165447 DOI: 10.1039/c7cc07926e] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
O-Substituted isocyanates (O-isocyanates) have rarely been used in organic synthesis, given their tendency to undergo side reactions (e.g., trimerization). Herein, we show that masked (blocked) O-isocyanate precursors allow one-pot or cascade reaction sequences featuring base-catalyzed substitution with 2-iodoanilines and 2-iodobenzylamines followed by copper-catalyzed cyclization, to form benzimidazolones and 3,4-dihydroquinazolin-2(1H)-ones. This work shows that O-isocyanates can serve as efficient building blocks for the synthesis of hydroxylamine-containing heterocycles.
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Affiliation(s)
- Qiang Wang
- CCNU-uOttawa Joint Research Centre, Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei 430079, China
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29
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Huang X, Zhuang T, Kates PA, Gao H, Chen X, Groves JT. Alkyl Isocyanates via Manganese-Catalyzed C-H Activation for the Preparation of Substituted Ureas. J Am Chem Soc 2017; 139:15407-15413. [PMID: 28976738 DOI: 10.1021/jacs.7b07658] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Organic isocyanates are versatile intermediates that provide access to a wide range of functionalities. In this work, we have developed the first synthetic method for preparing aliphatic isocyanates via direct C-H activation. This method proceeds efficiently at room temperature and can be applied to functionalize secondary, tertiary, and benzylic C-H bonds with good yields and functional group compatibility. Moreover, the isocyanate products can be readily converted to substituted ureas without isolation, demonstrating the synthetic potential of the method. To study the reaction mechanism, we have synthesized and characterized a rare MnIV-NCO intermediate and demonstrated its ability to transfer the isocyanate moiety to alkyl radicals. Using EPR spectroscopy, we have directly observed a MnIV intermediate under catalytic conditions. Isocyanation of celestolide with a chiral manganese salen catalyst followed by trapping with aniline afforded the urea product in 51% enantiomeric excess. This represents the only example of an asymmetric synthesis of an organic urea via C-H activation. When combined with our DFT calculations, these results clearly demonstrate that the C-NCO bond was formed through capture of a substrate radical by a MnIV-NCO intermediate.
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Affiliation(s)
- Xiongyi Huang
- Department of Chemistry, Princeton University , Princeton, New Jersey 08544, United States
| | - Thompson Zhuang
- Department of Chemistry, Princeton University , Princeton, New Jersey 08544, United States
| | - Patrick A Kates
- Department of Chemistry, Princeton University , Princeton, New Jersey 08544, United States
| | - Hongxin Gao
- Department of Chemistry, Princeton University , Princeton, New Jersey 08544, United States
| | - Xinyi Chen
- Department of Chemistry, Princeton University , Princeton, New Jersey 08544, United States
| | - John T Groves
- Department of Chemistry, Princeton University , Princeton, New Jersey 08544, United States
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30
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Strotman NA, Ortiz A, Savage SA, Wilbert CR, Ayers S, Kiau S. Revisiting a Classic Transformation: A Lossen Rearrangement Initiated by Nitriles and "Pseudo-Catalytic" in Isocyanate. J Org Chem 2017; 82:4044-4049. [PMID: 28394130 DOI: 10.1021/acs.joc.7b00450] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The direct conversion of a hydroxamic acid to an amine has been accomplished in a single step in the synthesis of HIV drug candidate BMS-955176. This process utilizes catalytic base and proceeds under mild conditions (CH3CN, cat. DBU, 60 °C), without the need for strong electrophiles required for typical Lossen rearrangements, and can be applied to aliphatic and aromatic hydroxamic acids. Through investigation of the kinetics of this transformation, a mechanism was revealed involving a novel initiation pathway and a self-propagation cycle. The initiation pathway involves activation of hydroxamic acid by nitriles and subsequent Lossen rearrangement to generate the corresponding isocyanate. The isocyanate functions as a "pseudo-catalyst" for this system, leading to generation of product through a second Lossen rearrangement and regeneration of a new isocyanate molecule. Thorough mechanistic understanding allowed for this highly efficient process to be implemented on a 55 kg scale in 95.5% isolated yield.
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Affiliation(s)
- Neil A Strotman
- Chemical and Synthetic Development, Bristol-Myers Squibb , One Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Adrian Ortiz
- Chemical and Synthetic Development, Bristol-Myers Squibb , One Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Scott A Savage
- Chemical and Synthetic Development, Bristol-Myers Squibb , One Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Christopher R Wilbert
- Chemical and Synthetic Development, Bristol-Myers Squibb , One Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Sloan Ayers
- Chemical and Synthetic Development, Bristol-Myers Squibb , One Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Susanne Kiau
- Chemical and Synthetic Development, Bristol-Myers Squibb , One Squibb Drive, New Brunswick, New Jersey 08903, United States
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31
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Hendrick CE, Wang Q. Emerging Developments Using Nitrogen-Heteroatom Bonds as Amination Reagents in the Synthesis of Aminoarenes. J Org Chem 2017; 82:839-847. [PMID: 28058838 DOI: 10.1021/acs.joc.6b02792] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Aminoarenes constitute valuable building blocks in organic synthesis and an essential skeleton ubiquitously found in ligands, agrochemicals, and pharmaceuticals. This Synopsis presents recent amination methods using nitrogen-heteroatom bonds as a powerful and versatile platform to rapidly synthesize diverse aminoarenes, with a focus on aryne amino functionalization and transition-metal-catalyzed arene C-H amination.
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Affiliation(s)
- Charles E Hendrick
- Department of Chemistry, Duke University , Durham, North Carolina 27708, United States
| | - Qiu Wang
- Department of Chemistry, Duke University , Durham, North Carolina 27708, United States
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32
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Hoshino Y, Ohtsuka N, Honda K. Highly Selective Synthesis of Primary Amines via Self-Propagative Lossen Rearrangement. J SYN ORG CHEM JPN 2017. [DOI: 10.5059/yukigoseikyokaishi.75.746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yujiro Hoshino
- Graduate School of Environment and Information Sciences, Yokohama National University
| | | | - Kiyoshi Honda
- Graduate School of Environment and Information Sciences, Yokohama National University
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33
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Li F, Huang CH, Xie LN, Qu N, Shao J, Shao B, Zhu BZ. An Exceptionally Facile Two-Step Structural Isomerization and Detoxication via a Water-Assisted Double Lossen Rearrangement. Sci Rep 2016; 6:39207. [PMID: 28008985 PMCID: PMC5180244 DOI: 10.1038/srep39207] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Accepted: 11/14/2016] [Indexed: 11/16/2022] Open
Abstract
N-hydroxyphthalimide (NHPI), which is best known as an organocatalyst for efficient C-H activation, has been found to be oxidized by quinoid compounds to its corresponding catalytically active nitroxide-radical. Here, we found that NHPI can be isomerized into isatoic anhydride by an unusually facile two-step method using tetrachloro-1,4-benzoquinone (TCBQ, p-chloranil), accompanied by a two-step hydrolytic dechlorination of highly toxic TCBQ into the much less toxic dihydroxylation product, 2,5-dichloro-3,6-dihydroxy-1,4-benzoquinone (chloranilic acid). Interestingly, through the complementary application of oxygen-18 isotope-labeling, HPLC combined with electrospray ionization quadrupole time-of-flight and high resolution Fourier transform ion cyclotron resonance mass spectrometric studies, we determined that water was the source and origin of oxygen for isatoic anhydride. Based on these data, we proposed that nucleophilic attack with a subsequent water-assisted Lossen rearrangement coupled with rapid intramolecular addition and cyclization in two consecutive steps was responsible for this unusual structural isomerization of NHPI and concurrent hydroxylation/detoxication of TCBQ. This is the first report of an exceptionally facile double-isomerization of NHPI via an unprecedented water-assisted double-Lossen rearrangement under normal physiological conditions. Our findings may have broad implications for future research on hydroxamic acids and polyhalogenated quinoid carcinogens, two important classes of compounds of major chemical and biological interest.
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Affiliation(s)
- Feng Li
- State Key Laboratory of Environmental Chemistry and Eco-toxicology, Research Centre for Eco-environmental Sciences, the Chinese Academy of Sciences, Beijing 100085, PR China
| | - Chun-Hua Huang
- State Key Laboratory of Environmental Chemistry and Eco-toxicology, Research Centre for Eco-environmental Sciences, the Chinese Academy of Sciences, Beijing 100085, PR China
| | - Lin-Na Xie
- State Key Laboratory of Environmental Chemistry and Eco-toxicology, Research Centre for Eco-environmental Sciences, the Chinese Academy of Sciences, Beijing 100085, PR China
| | - Na Qu
- State Key Laboratory of Environmental Chemistry and Eco-toxicology, Research Centre for Eco-environmental Sciences, the Chinese Academy of Sciences, Beijing 100085, PR China
| | - Jie Shao
- State Key Laboratory of Environmental Chemistry and Eco-toxicology, Research Centre for Eco-environmental Sciences, the Chinese Academy of Sciences, Beijing 100085, PR China
| | - Bo Shao
- State Key Laboratory of Environmental Chemistry and Eco-toxicology, Research Centre for Eco-environmental Sciences, the Chinese Academy of Sciences, Beijing 100085, PR China
| | - Ben-Zhan Zhu
- State Key Laboratory of Environmental Chemistry and Eco-toxicology, Research Centre for Eco-environmental Sciences, the Chinese Academy of Sciences, Beijing 100085, PR China
- Linus Pauling Institute, Oregon State University, Corvallis, OR 97331, USA
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34
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Kim HK, Lee A. One-pot synthesis of carbamates and thiocarbamates from Boc-protected amines. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.09.038] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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35
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One-pot synthesis of primary amines from carboxylic acids through rearrangement of in situ generated hydroxamic acid derivatives. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.10.037] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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36
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Shuler SA, Yin G, Krause SB, Vesper CM, Watson DA. Synthesis of Secondary Unsaturated Lactams via an Aza-Heck Reaction. J Am Chem Soc 2016; 138:13830-13833. [PMID: 27754648 DOI: 10.1021/jacs.6b08932] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The preparation of unsaturated secondary lactams via the palladium-catalyzed cyclization of O-phenyl hydroxamates onto a pendent alkene is reported. This method provides rapid access to a broad range of lactams that are widely useful building blocks in alkaloid synthesis. Mechanistic studies support an aza-Heck-type pathway.
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Affiliation(s)
- Scott A Shuler
- Department of Chemistry and Biochemistry, University of Delaware , Newark, Delaware 19716, United States
| | - Guoyin Yin
- Department of Chemistry and Biochemistry, University of Delaware , Newark, Delaware 19716, United States
| | - Sarah B Krause
- Department of Chemistry and Biochemistry, University of Delaware , Newark, Delaware 19716, United States
| | - Caroline M Vesper
- Department of Chemistry and Biochemistry, University of Delaware , Newark, Delaware 19716, United States
| | - Donald A Watson
- Department of Chemistry and Biochemistry, University of Delaware , Newark, Delaware 19716, United States
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37
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Albada B, Metzler-Nolte N. Organometallic–Peptide Bioconjugates: Synthetic Strategies and Medicinal Applications. Chem Rev 2016; 116:11797-11839. [DOI: 10.1021/acs.chemrev.6b00166] [Citation(s) in RCA: 149] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Bauke Albada
- Laboratory of Organic Chemistry, Wageningen University & Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands
| | - Nils Metzler-Nolte
- Inorganic
Chemistry I − Bioinorganic Chemistry, Ruhr University Bochum, Universitätsstrasse 150, 44780-D Bochum, Germany
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38
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Mocci R, Luca LD, Delogu F, Porcheddu A. An Environmentally Sustainable Mechanochemical Route to Hydroxamic Acid Derivatives. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600350] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Rita Mocci
- Università degli Studi di Cagliari, Dipartimento di Scienze Chimiche e Geologiche; SS 554 bivio per Sestu 09042 Monserrato (Ca Italy
| | - Lidia De Luca
- Università degli Studi di Sassari, Dipartimento di Chimica e Farmacia; via Vienna 2 07100 Sassari Italy
| | - Francesco Delogu
- Università degli Studi di Cagliari, Dipartimento di Ingegneria Meccanica, Chimica, e dei Materiali; via Marengo 2 09123 Cagliari Italy
| | - Andrea Porcheddu
- Università degli Studi di Cagliari, Dipartimento di Scienze Chimiche e Geologiche; SS 554 bivio per Sestu 09042 Monserrato (Ca Italy
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39
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Totaro KA, Liao X, Bhattacharya K, Finneman JI, Sperry JB, Massa MA, Thorn J, Ho SV, Pentelute BL. Systematic Investigation of EDC/sNHS-Mediated Bioconjugation Reactions for Carboxylated Peptide Substrates. Bioconjug Chem 2016; 27:994-1004. [PMID: 26974183 DOI: 10.1021/acs.bioconjchem.6b00043] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
1-Ethyl-3-(3-(dimethylamino)propyl)carbodiimide (EDC) bioconjugations have been utilized in preparing variants for medical research. While there have been advances in optimizing the reaction for aqueous applications, there has been limited focus toward identifying conditions and side reactions that interfere with product formation. We present a systematic investigation of EDC/N-hydroxysulfosuccinimide (sNHS)-mediated bioconjugations on carboxylated peptides and small proteins. We identified yet-to-be-reported side products arising from both the reagents and substrates. Model peptides used in this study illustrate particular substrates are more susceptible to side reactions than others. From our studies, we found that bioconjugations are more efficient with high concentrations of amine nucleophile but not sNHS. Performing bioconjugations on a model affibody protein show that the trends established with model peptides hold for more complex systems.
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Affiliation(s)
- Kyle A Totaro
- Department of Chemistry, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Xiaoli Liao
- Department of Chemistry, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Keshab Bhattacharya
- Pfizer Worldwide Research and Development , 700 Chesterfield Parkway West, Chesterfield, Missouri 63017, United States
| | - Jari I Finneman
- Pfizer Worldwide Research and Development , 700 Chesterfield Parkway West, Chesterfield, Missouri 63017, United States
| | - Justin B Sperry
- Pfizer Worldwide Research and Development , 700 Chesterfield Parkway West, Chesterfield, Missouri 63017, United States
| | - Mark A Massa
- Pfizer Worldwide Research and Development , 700 Chesterfield Parkway West, Chesterfield, Missouri 63017, United States
| | - Jennifer Thorn
- Pfizer Worldwide Research and Development , 700 Chesterfield Parkway West, Chesterfield, Missouri 63017, United States
| | - Sa V Ho
- Pfizer Worldwide Research and Development , 1 Burtt Road, Andover, Massachusetts 01810, United States
| | - Bradley L Pentelute
- Department of Chemistry, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
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40
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Orlowska E, Roller A, Wiesinger H, Pignitter M, Jirsa F, Krachler R, Kandioller W, Keppler BK. Benzoic hydroxamate-based iron complexes as model compounds for humic substances: synthesis, characterization and algal growth experiments. RSC Adv 2016. [DOI: 10.1039/c5ra25256c] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Benzoic hydroxamate-based monomeric and dimeric Fe(iii) complexes has been investigated as humic acid models. The stability in pure water and seawater was monitored and the ability to release iron has been examined with the algae feeding trials.
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Affiliation(s)
- Ewelina Orlowska
- Institute of Inorganic Chemistry
- Faculty of Chemistry
- University of Vienna
- A-1090 Vienna
- Austria
| | - Alexander Roller
- Institute of Inorganic Chemistry
- Faculty of Chemistry
- University of Vienna
- A-1090 Vienna
- Austria
| | - Hubert Wiesinger
- Institute of Inorganic Chemistry
- Faculty of Chemistry
- University of Vienna
- A-1090 Vienna
- Austria
| | - Marc Pignitter
- Department of Nutritional and Physiological Chemistry
- Faculty of Chemistry University of Vienna
- A-1090 Vienna
- Austria
| | - Franz Jirsa
- Institute of Inorganic Chemistry
- Faculty of Chemistry
- University of Vienna
- A-1090 Vienna
- Austria
| | - Regina Krachler
- Institute of Inorganic Chemistry
- Faculty of Chemistry
- University of Vienna
- A-1090 Vienna
- Austria
| | - Wolfgang Kandioller
- Institute of Inorganic Chemistry
- Faculty of Chemistry
- University of Vienna
- A-1090 Vienna
- Austria
| | - Bernhard K. Keppler
- Institute of Inorganic Chemistry
- Faculty of Chemistry
- University of Vienna
- A-1090 Vienna
- Austria
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41
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Ohtsuka N, Okuno M, Hoshino Y, Honda K. A base-mediated self-propagative Lossen rearrangement of hydroxamic acids for the efficient and facile synthesis of aromatic and aliphatic primary amines. Org Biomol Chem 2016; 14:9046-54. [DOI: 10.1039/c6ob01178k] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
A variety of aromatic and aliphatic hydroxamic acids were converted to the corresponding primary amines via base-mediated rearrangement.
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Affiliation(s)
- Naoya Ohtsuka
- Graduate School of Environment and Information Sciences
- Yokohama National University
- Yokohama 240-8501
- Japan
| | - Moriaki Okuno
- Graduate School of Environment and Information Sciences
- Yokohama National University
- Yokohama 240-8501
- Japan
| | - Yujiro Hoshino
- Graduate School of Environment and Information Sciences
- Yokohama National University
- Yokohama 240-8501
- Japan
| | - Kiyoshi Honda
- Graduate School of Environment and Information Sciences
- Yokohama National University
- Yokohama 240-8501
- Japan
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42
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Lu S, Zhang Y, Kalin JH, Cai L, Kozikowski AP, Pike VW. Exploration of the labeling of [11C]tubastatin A at the hydroxamic acid site with [11C]carbon monoxide. J Labelled Comp Radiopharm 2015; 59:9-13. [PMID: 26647018 DOI: 10.1002/jlcr.3360] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Revised: 10/28/2015] [Accepted: 11/10/2015] [Indexed: 12/11/2022]
Abstract
We aimed to label tubastatin A (1) with carbon-11 (t1/2 = 20.4 min) in the hydroxamic acid site to provide a potential radiotracer for imaging histone deacetylase 6 in vivo with positron emission tomography. Initial attempts at a one-pot Pd-mediated insertion of [(11)C]carbon monoxide between the aryl iodide (2) and hydroxylamine gave low radiochemical yields (<5%) of [(11) C]1. Labeling was achieved in useful radiochemical yields (16.1 ± 5.6%, n = 4) through a two-step process based on Pd-mediated insertion of [(11)C]carbon monoxide between the aryl iodide (2) and p-nitrophenol to give the [(11)C]p-nitrophenyl ester ([(11)C]5), followed by ultrasound-assisted hydroxyaminolysis of the activated ester with excess hydroxylamine in a DMSO/THF mixture in the presence of a strong phosphazene base P1-t-Bu. However, success in labeling the hydroxamic acid group of [(11)C]tubastatin A was not transferable to the labeling of three other model hydroxamic acids.
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Affiliation(s)
- Shuiyu Lu
- Molecular Imaging Branch, National Institute of Mental Health, National Institutes of Health, Bethesda, MD, USA
| | - Yi Zhang
- Molecular Imaging Branch, National Institute of Mental Health, National Institutes of Health, Bethesda, MD, USA
| | - Jay H Kalin
- Department of Medicinal Chemistry and Pharmacognosy, University of Illinois at Chicago, Chicago, IL, USA
| | - Lisheng Cai
- Molecular Imaging Branch, National Institute of Mental Health, National Institutes of Health, Bethesda, MD, USA
| | - Alan P Kozikowski
- Department of Medicinal Chemistry and Pharmacognosy, University of Illinois at Chicago, Chicago, IL, USA
| | - Victor W Pike
- Molecular Imaging Branch, National Institute of Mental Health, National Institutes of Health, Bethesda, MD, USA
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43
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Lourie LF, Serguchev YA, Bentya AV, Ponomarenko MV, Rusanov EB, Vovk MV, Fokin AA, Ignat’ev NV. Metal free electrophilic fluoro-cyclization of unsaturated N-hydroxy- and N-acetoxyamides with N–F reagents. J Fluor Chem 2015. [DOI: 10.1016/j.jfluchem.2015.04.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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44
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Sati GC, Crich D. Facile Synthesis of 3-N-Alkyl Pyrimidin-2,4-diones from N-Sulfonyloxy Maleimides and Amines. Org Lett 2015; 17:4122-4. [DOI: 10.1021/acs.orglett.5b02079] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Girish C. Sati
- Department
of Chemistry, Wayne State University, 5101 Cass Avenue, Detroit, Michigan 48202, United States
| | - David Crich
- Department
of Chemistry, Wayne State University, 5101 Cass Avenue, Detroit, Michigan 48202, United States
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45
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Park Y, Jee S, Kim JG, Chang S. Study of Sustainability and Scalability in the Cp*Rh(III)-Catalyzed Direct C–H Amidation with 1,4,2-Dioxazol-5-ones. Org Process Res Dev 2015. [DOI: 10.1021/acs.oprd.5b00164] [Citation(s) in RCA: 105] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yoonsu Park
- Department
of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 305-701, Republic of Korea
- Center
for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon, 305-701, Republic of Korea
| | - Soyeon Jee
- Department
of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 305-701, Republic of Korea
- Center
for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon, 305-701, Republic of Korea
| | - Jeung Gon Kim
- Department
of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 305-701, Republic of Korea
- Center
for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon, 305-701, Republic of Korea
| | - Sukbok Chang
- Department
of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 305-701, Republic of Korea
- Center
for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon, 305-701, Republic of Korea
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46
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Brandès S, Sornosa-Ten A, Rousselin Y, Lagrelette M, Stern C, Moncomble A, Cornard JP, Meyer M. Conformational and structural studies of N-methylacetohydroxamic acid and of its mono- and bis-chelated uranium(VI) complexes. J Inorg Biochem 2015; 151:164-75. [PMID: 26116424 DOI: 10.1016/j.jinorgbio.2015.06.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2015] [Revised: 05/29/2015] [Accepted: 06/01/2015] [Indexed: 12/18/2022]
Abstract
The thermodynamics and kinetics of the cis/trans isomerism of N-methylacetohydroxamic acid (NMAH) and its conjugated base (NMA(-)) have been reinvestigated in aqueous media by (1)H NMR spectroscopy. Hindered rotation around the central C-N bond due to electronic delocalization becomes slow enough on the NMR time scale to observe both rotamers in equilibrium in D2O at room temperature. By properly assigning the methyl group resonances, evidence for the prevalence of the E over the Z form is unambiguously provided [K300=[E]/[Z]=2.86(2) and 9.63(5) for NMAH and NMA(-), respectively], closing thereby a long-lasting dispute about the most stable conformer. To that end, calculations of the chemical shifts by density functional theory (DFT), which accurately reproduced the experimental data, turned out to be a much more reliable method than the direct computation of the relative energy for each conformer. The Z ⇌ E interconversion dynamics was probed at 300 K in D2O by 2D exchange-correlated spectroscopy (EXSY), affording the associated rate constants [kZE=9.0(2) s(-1) and kEZ=3.14(5) s(-1) for NMAH, kZE=0.96(3) s(-1) and kEZ=0.10(2) s(-1) for NMA(-)] and activation barriers at 300 K [ΔG(≠)ZE=68.0 kJ mol(-1) and ΔG(≠)EZ=70.6 kJ mol(-1) for NMAH, ΔG(≠)ZE=73.6 kJ mol(-1) and ΔG(≠)EZ=79.2 kJ mol(-1) for NMA(-)]. For the first time, mono- and bis-chelated uranium(VI) complexes of NMA(-) have been isolated. Crystals of [UO2(NMA)(NO3)(H2O)2] and [UO2(NMA)2(H2O)] have been characterized by X-ray diffractometry, infrared and Raman spectroscopies.
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Affiliation(s)
- Stéphane Brandès
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB), UMR 6302, CNRS, Université de Bourgogne Franche-Comté, 9 avenue Alain Savary, BP 47870, 21078 Dijon Cedex, France
| | - Alejandra Sornosa-Ten
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB), UMR 6302, CNRS, Université de Bourgogne Franche-Comté, 9 avenue Alain Savary, BP 47870, 21078 Dijon Cedex, France
| | - Yoann Rousselin
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB), UMR 6302, CNRS, Université de Bourgogne Franche-Comté, 9 avenue Alain Savary, BP 47870, 21078 Dijon Cedex, France
| | - Mickael Lagrelette
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB), UMR 6302, CNRS, Université de Bourgogne Franche-Comté, 9 avenue Alain Savary, BP 47870, 21078 Dijon Cedex, France
| | - Christine Stern
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB), UMR 6302, CNRS, Université de Bourgogne Franche-Comté, 9 avenue Alain Savary, BP 47870, 21078 Dijon Cedex, France
| | - Aurélien Moncomble
- Laboratoire de Spectrochimie Infrarouge et Raman (LASIR), UMR 8516, CNRS, Université de Lille - Sciences et Technologies, 59655 Villeneuve d'Ascq Cedex, France
| | - Jean-Paul Cornard
- Laboratoire de Spectrochimie Infrarouge et Raman (LASIR), UMR 8516, CNRS, Université de Lille - Sciences et Technologies, 59655 Villeneuve d'Ascq Cedex, France
| | - Michel Meyer
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB), UMR 6302, CNRS, Université de Bourgogne Franche-Comté, 9 avenue Alain Savary, BP 47870, 21078 Dijon Cedex, France.
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47
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Rokicki G, Parzuchowski PG, Mazurek M. Non-isocyanate polyurethanes: synthesis, properties, and applications. POLYM ADVAN TECHNOL 2015. [DOI: 10.1002/pat.3522] [Citation(s) in RCA: 229] [Impact Index Per Article: 25.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Gabriel Rokicki
- Warsaw University of Technology; Faculty of Chemistry; Noakowskiego 3 00-664 Warsaw Poland
| | - Paweł G. Parzuchowski
- Warsaw University of Technology; Faculty of Chemistry; Noakowskiego 3 00-664 Warsaw Poland
| | - Magdalena Mazurek
- Warsaw University of Technology; Faculty of Chemistry; Noakowskiego 3 00-664 Warsaw Poland
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48
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Zhao J, Gimi R, Katti S, Reardon M, Nivorozhkin V, Konowicz P, Lee E, Sole L, Green J, Siegel CS. Process Development of a GCS Inhibitor Including Demonstration of Lossen Rearrangement on Kilogram Scale. Org Process Res Dev 2015. [DOI: 10.1021/op500379a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jin Zhao
- Synthesis Development, Sanofi U.S. R&D, 153 Second Ave, Waltham, Massachusetts 02451, United States
| | - Rayomand Gimi
- Synthesis Development, Sanofi U.S. R&D, 153 Second Ave, Waltham, Massachusetts 02451, United States
| | - Sanjeev Katti
- Chemical
Process Development, Genzyme, Waltham, Massachusetts 02451, United States
| | - Michael Reardon
- Genzyme, Sanofi U.S. R&D, 270 Albany Street, Cambridge, Massachusetts 02193, United States
| | - Vitaly Nivorozhkin
- Chemical
Process Development, Genzyme, Waltham, Massachusetts 02451, United States
| | - Paul Konowicz
- Genzyme, Sanofi U.S. R&D, 270 Albany Street, Cambridge, Massachusetts 02193, United States
| | - Edward Lee
- Chemical
Process Development, Genzyme, Waltham, Massachusetts 02451, United States
| | - Lynne Sole
- Chemical
Process Development, Genzyme, Waltham, Massachusetts 02451, United States
| | - Jerome Green
- Chemical
Process Development, Genzyme, Waltham, Massachusetts 02451, United States
| | - Craig S. Siegel
- Synthesis Development, Sanofi U.S. R&D, 153 Second Ave, Waltham, Massachusetts 02451, United States
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49
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Starkov P, Jamison TF, Marek I. Electrophilic Amination: The Case of Nitrenoids. Chemistry 2015; 21:5278-300. [DOI: 10.1002/chem.201405779] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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50
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Sardarian AR, Inaloo ID. 4-Dodecylbenzenesulfonic acid (DBSA) promoted solvent-free diversity-oriented synthesis of primary carbamates, S-thiocarbamates and ureas. RSC Adv 2015. [DOI: 10.1039/c5ra14528g] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A simple and efficient solvent-free preparation of primary carbamates, S-thiocarbamates and ureas from alcohols, phenols, thiols and amines in the presence of 4-dodecylbenzenesulfonic acid, as a cheap and green Brønsted acid, has been described.
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Affiliation(s)
- Ali Reza Sardarian
- Chemistry Department
- College of Sciences
- Shiraz University
- Shiraz 71454
- Iran
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