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Markham GD, Rostami H, Larkin JD, Bock CW. Models for boronic acid receptors II: a computational structural, bonding, and thermochemical investigation of the RB(OH)2∙H2O∙NH3 and RB(−OCH2CH2O−)∙NH3∙H2O potential energy surfaces (R = H, methyl, phenyl, and ortho-methyl-phenyl). Struct Chem 2023. [DOI: 10.1007/s11224-023-02131-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
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2
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Proniewicz E, Gralec B, Ozaki Y. Homogeneous Pt nanostructures surface functionalized with phenylboronic acid phosphonic acid derivatives as potential biochemical nanosensors and drugs: SERS and TERS studies. J Biomed Mater Res B Appl Biomater 2023; 111:1197-1206. [PMID: 36715221 DOI: 10.1002/jbm.b.35225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 12/26/2022] [Accepted: 01/13/2023] [Indexed: 01/31/2023]
Abstract
Here, surface-enhanced Raman scattering (SERS) and tip-enhanced Raman scattering (TERS) were used to characterize the selective adsorption of N-substituted 4-[(NH-R)(phosphono)-S-methyl]phenylboronic acids on the surface of platinum nanoparticles (PtNPs) from an aqueous solution and from air. The nature of the interaction of the studied compounds with the PtNPs/H2 O and PtNPs/air interfaces was discussed and compared. For this purpose, 4-[(N-anilino)(phosphono)-S-methyl]phenylboronic acid (1-PBA-PA) and its two analogs (2-PBA-PA and bis{1-PBA-PA}) as well as the PtNPs were synthesized in surfactant/ion-free solution via a synthetic route that allows control of the size and morphology of the NPs. The positively charged PtNPs with a size of ~12 nm were characterized by ultraviolet-visible spectroscopy (UV-Vis), dynamic light scattering (DLS), scanning electron microscopy (SEM), and X-ray powder diffraction (XRD).
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Affiliation(s)
- Edyta Proniewicz
- Faculty of Foundry Engineering, AGH University of Science and Technology, Krakow, Poland.,School of Biological and Environmental Sciences, Kwansei Gakuin University 1, Sanda, Hyogo, Japan
| | - Barbara Gralec
- Faculty of Chemistry, University of Warsaw, Warsaw, Poland
| | - Yukihiro Ozaki
- School of Biological and Environmental Sciences, Kwansei Gakuin University 1, Sanda, Hyogo, Japan
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Proniewicz E, Starowicz M, Ozaki Y. Determination of the Influence of Various Factors on the Character of Surface Functionalization of Copper(I) and Copper(II) Oxide Nanosensors with Phenylboronic Acid Derivatives. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:557-568. [PMID: 34933549 PMCID: PMC8757468 DOI: 10.1021/acs.langmuir.1c02990] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 12/08/2021] [Indexed: 06/14/2023]
Abstract
In this work, we attempt to determine the influence of the oxidation state of copper [Cu(I) vs Cu(II)], the nature of the interface (solid/aqueous vs solid/air), the incubation time, and the structure of N-substituted phenylboronic acids (PBAs) functionalizing the surface of copper oxide nanostructures (NSs) on the mode of adsorption. For this purpose, 4-[(N-anilino)(phosphono)-S-methyl]phenylboronic acid (1-PBA) and its two analogues (2-PBA and bis{1-PBA}) and the copper oxide NSs were synthesized in a surfactant-/ion-free solution via a synthetic route that allows controlling the size and morphology of NSs. The NSs were characterized by scanning electron microscopy, ultraviolet-visible spectroscopy, Raman spectroscopy, and X-ray diffraction, which confirmed the formation of spherical Cu2O nanoparticles (Cu2ONPs) with a size of 1.5 μm to 600 nm crystallized in a cubic cuprite structure and leaf-like CuO nanostructures (CuONSs) with dimensions of 80-180 nm in width and 400-700 nm in length and crystallized in a monoclinic structure. PBA analogues were deposited on the surface of the copper oxide NSs, and adsorption was investigated using surface-enhanced Raman spectroscopy (SERS). The changes in the orientation of the molecule relative to the substrate surface caused by the abovementioned factors were described, and the signal enhancement on the copper oxide NSs was determined. This is the first study using vibrational spectroscopy for these compounds.
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Affiliation(s)
- Edyta Proniewicz
- Faculty
of Foundry Engineering, AGH University of
Science and Technology, ul. Reymonta 23, 30-059 Krakow, Poland
- School
of Biological and Environmental Sciences, Kwansei Gakuin University, 2-1, Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Maria Starowicz
- Faculty
of Foundry Engineering, AGH University of
Science and Technology, ul. Reymonta 23, 30-059 Krakow, Poland
| | - Yukihiro Ozaki
- School
of Biological and Environmental Sciences, Kwansei Gakuin University, 2-1, Gakuen, Sanda, Hyogo 669-1337, Japan
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4
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Donald KJ, Gillespie S, Shafi Z. Ouroboros: Heterocycles closed by dative σ bonds and stabilized by π delocalization. Tetrahedron 2019. [DOI: 10.1016/j.tet.2018.11.058] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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5
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Brooks WLA, Sumerlin BS. Synthesis and Applications of Boronic Acid-Containing Polymers: From Materials to Medicine. Chem Rev 2015; 116:1375-97. [DOI: 10.1021/acs.chemrev.5b00300] [Citation(s) in RCA: 552] [Impact Index Per Article: 61.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- William L. A. Brooks
- George & Josephine Butler Polymer Research Laboratory, Center for Macromolecular Science & Engineering, Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
| | - Brent S. Sumerlin
- George & Josephine Butler Polymer Research Laboratory, Center for Macromolecular Science & Engineering, Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
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Sas EB, Kose E, Kurt M, Karabacak M. FT-IR, FT-Raman, NMR and UV-Vis spectra and DFT calculations of 5-bromo-2-ethoxyphenylboronic acid (monomer and dimer structures). SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 137:1315-1333. [PMID: 25305625 DOI: 10.1016/j.saa.2014.08.049] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2014] [Revised: 08/19/2014] [Accepted: 08/24/2014] [Indexed: 06/04/2023]
Abstract
In this study, the Fourier Transform Infrared (FT-IR) and Fourier Transform Raman (FT-Raman) spectra of 5-bromo-2-ethoxyphenylboronic acid (5Br2EPBA) are recorded in the solid phase in the region 4000-400 cm(-1) and 3500-10 cm(-1), respectively. The (1)H, (13)C and DEPT nuclear magnetic resonance (NMR) spectra are recorded in DMSO solution. The UV-Vis absorption spectrum of 5Br2EPBA is saved in the range of 200-400 nm in ethanol and water. The following theoretical calculations for monomeric and dimeric structures are supported by experimental results. The molecular geometry and vibrational frequencies in the ground state are calculated by using DFT methods with 6-31G(d,p) and 6-311G(d,p) basis sets. There are four conformers for the present molecule. The computational results diagnose the most stable conformer of 5Br2EPBA as Trans-Cis (TC) form. The complete assignments are performed on the basis of the total energy distribution (TED) of vibrational modes, calculated with scaled quantum mechanics (SQM) method in parallel quantum solutions (PQS) program. The (1)H and (13)C NMR chemical shifts of 5Br2EPBA molecule are calculated by using the Gauge Invariant Atomic Orbital (GIAO) method in DMSO and gas phase for monomer and dimer structures of the most stable conformer. Moreover, electronic properties, such as the HOMO and LUMO energies (by TD-DFT and CIS methods) and molecular electrostatic potential surface (MEPs) are investigated. Stability of the molecule arising from hyper-conjugative interactions, charge delocalization is analyzed using natural bond orbital (NBO) analysis. Nonlinear optical (NLO) properties and thermodynamic features are presented. All calculated results are compared with the experimental data of the title molecule. The correlation of theoretical and experimental results provides a detailed description of the structural and physicochemical properties of the title molecule.
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Affiliation(s)
- E B Sas
- Department of Physics, Ahi Evran University, Kırsehir, Turkey
| | - E Kose
- Department of Physics, Celal Bayar University, Manisa, Turkey
| | - M Kurt
- Department of Physics, Ahi Evran University, Kırsehir, Turkey.
| | - M Karabacak
- Department of Mechatronics Engineering, H.F.T. Technology Faculty, Celal Bayar University, Turgutlu, Manisa, Turkey
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Deng CC, Brooks WL, Abboud KA, Sumerlin BS. Boronic Acid-Based Hydrogels Undergo Self-Healing at Neutral and Acidic pH. ACS Macro Lett 2015; 4:220-224. [PMID: 35596411 DOI: 10.1021/acsmacrolett.5b00018] [Citation(s) in RCA: 271] [Impact Index Per Article: 30.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
This report describes the synthesis and characterization of boronate ester-cross-linked hydrogels capable of self-healing behavior at neutral and acidic pH. This atypically wide pH range over which healing behavior is observed was achieved through the use of an intramolecular coordinating boronic acid monomer, 2-acrylamidophenylboronic acid (2APBA), where the internal coordination helped to stabilize cross-links formed at acidic and neutral pH. Two different hydrogels were formed from a 2APBA copolymer cross-linked with either poly(vinyl alcohol) or a catechol-functionalized copolymer. The self-healing ability of these hydrogels was characterized through physical testing and rheological studies. Furthermore, the catechol cross-linked hydrogel was shown to be oxygen sensitive, demonstrating reduced self-healing and stress relaxation after partial oxidation. The synthesis of these hydrogels demonstrates a new strategy to produce boronic acid materials capable of self-healing at physiological pH.
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Affiliation(s)
- Christopher C. Deng
- George and Josephine Butler Polymer
Research Laboratory, Center for
Macromolecular Science and Engineering, Department of Chemistry, and ‡Department of
Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611-7200, United States
| | - William L.A. Brooks
- George and Josephine Butler Polymer
Research Laboratory, Center for
Macromolecular Science and Engineering, Department of Chemistry, and ‡Department of
Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611-7200, United States
| | - Khalil A. Abboud
- George and Josephine Butler Polymer
Research Laboratory, Center for
Macromolecular Science and Engineering, Department of Chemistry, and ‡Department of
Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611-7200, United States
| | - Brent S. Sumerlin
- George and Josephine Butler Polymer
Research Laboratory, Center for
Macromolecular Science and Engineering, Department of Chemistry, and ‡Department of
Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611-7200, United States
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8
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Karabacak M, Kose E, Atac A, Sas E, Asiri A, Kurt M. Experimental (FT-IR, FT-Raman, UV–Vis, 1H and 13CNMR) and computational (density functional theory) studies on 3-bromophenylboronic acid. J Mol Struct 2014. [DOI: 10.1016/j.molstruc.2014.07.058] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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9
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Monomeric and dimeric structures analysis and spectroscopic characterization of 3,5-difluorophenylboronic acid with experimental (FT-IR, FT-Raman, 1H and 13C NMR, UV) techniques and quantum chemical calculations. J Mol Struct 2014. [DOI: 10.1016/j.molstruc.2013.10.064] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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10
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Silla JM, Cormanich RA, Rittner R, Freitas MP. Conformational analysis and intramolecular interactions in monosubstituted phenylboranes and phenylboronic acids. Beilstein J Org Chem 2013; 9:1127-34. [PMID: 23843904 PMCID: PMC3701380 DOI: 10.3762/bjoc.9.125] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2013] [Accepted: 05/15/2013] [Indexed: 11/23/2022] Open
Abstract
A 1TSJF,H(O) coupling pathway, dictated by a hydrogen bond, in some 2-fluorobenzoic acids has been observed, while such an interaction does not occur in 2-fluorophenol. Thus, this work reports the conformational analysis of 2-fluorophenylboronic acid (1), in order to evaluate a possible intramolecular OH∙∙∙F hydrogen bond in comparison to an nF→pB interaction, which mimics the quantum nF→σ*OH hydrogen bond that would be expected in 2-fluorophenol. 2-Fluorophenylborane (3), which does not experience hydrogen bonding, was used to verify whether nF→pB interaction governs the conformational equilibrium in 1 due to a predominant OH∙∙∙F hydrogen bond or to other effects. A series of 2-X-phenylboranes (X = Cl, Br, NH2, PH2, OH and SH) were further computationally analyzed to search for electron donors to boron, capable of influencing the conformational equilibrium. Overall, the intramolecular OH∙∙∙F hydrogen bond in 1 is quite stabilizing and dictates the 1hJF,H(O) coupling constant. Moreover, electron donation to the empty p orbital of boron (for noncoplanar BH2 moiety relative to the phenyl ring) is also significantly stabilizing for the NH2 and PH2 derivatives, but not enough to make the corresponding conformers appreciably populated, because of steric effects and the loss of πCC→pB resonance. Thus, the results found earlier for 2-fluorophenol about the lack of intramolecular hydrogen bonding are now corroborated.
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Affiliation(s)
- Josué M Silla
- Department of Chemistry, Federal University of Lavras, P.O. Box 3037, 37200-000, Lavras, MG, Brazil
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11
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Kuttler A, Durganala S, Fratini A, Morgan AB, Benin V. Structure, Theoretical Studies, and Coupling Reactions of Some New Cyclic Boronic Esters. HETEROATOM CHEMISTRY 2013. [DOI: 10.1002/hc.21102] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Andrew Kuttler
- Department of Chemistry; University of Dayton; Dayton; Ohio; 45469-2357
| | | | - Albert Fratini
- Department of Chemistry; University of Dayton; Dayton; Ohio; 45469-2357
| | - Alexander B. Morgan
- Applied Combustion and Energy Group; University of Dayton Research Institute; Dayton; Ohio; 45469-0170
| | - Vladimir Benin
- Department of Chemistry; University of Dayton; Dayton; Ohio; 45469-2357
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12
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Karabacak M, Kose E, Atac A, Ali Cipiloglu M, Kurt M. Molecular structure investigation and spectroscopic studies on 2,3-difluorophenylboronic acid: a combined experimental and theoretical analysis. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 97:892-908. [PMID: 22902933 DOI: 10.1016/j.saa.2012.07.077] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2012] [Revised: 07/06/2012] [Accepted: 07/22/2012] [Indexed: 06/01/2023]
Abstract
This work presents the characterization of 2,3-difluorophenylboronic acid (abbreviated as 2,3-DFPBA, C(6)H(3)B(OH)(2)F(2)) by quantum chemical calculations and spectral techniques. The spectroscopic properties were investigated by FT-IR, FT-Raman UV-Vis, (1)H and (13)C nuclear magnetic resonance (NMR) techniques. The FT-IR spectrum (4000-400 cm(-1)) and the FT-Raman spectrum (3500-10 cm(-1)) in the solid phase were recorded for 2,3-DFPBA. The (1)H and (13)C NMR spectra were recorded in DMSO solution. The UV-Vis absorption spectra of the 2,3-DFPBA that dissolved in water and ethanol were recorded in the range of 200-400 nm. There are four possible conformers for this molecule. The computational results diagnose the most stable conformer of the 2,3-DFPBA as the trans-cis form. The structural and spectroscopic data of the molecule were obtained for all four conformers from DFT (B3LYP) with 6-311++G (d,p) basis set calculations. The theoretical wavenumbers were scaled and compared with experimental FT-IR and FT-Raman spectra. The complete assignments were performed on the basis of the experimental results and total energy distribution (TED) of the vibrational modes, calculated with scaled quantum mechanics (SQM) method, interpreted in terms of fundamental modes. We obtained good consistency between experimental and theoretical spectra. (13)C and (1)H NMR chemical shifts of the molecule were calculated by using the gauge-invariant atomic orbital (GIAO) method. The electronic properties, such as excitation energies, absorption wavelengths, HOMO and LUMO energies, were performed by time-dependent DFT (TD-DFT) approach. Finally the calculation results were analyzed to simulate infrared, Raman, NMR and UV spectra of the 2,3-DFPBA which show good agreement with observed spectra.
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Affiliation(s)
- Mehmet Karabacak
- Department of Physics, Afyon Kocatepe University, Afyonkarahisar, Turkey
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13
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Schumacher S, Katterle M, Hettrich C, Paulke BR, Hall DG, Scheller FW, Gajovic-Eichelmann N. Label-free detection of enhanced saccharide binding at pH 7.4 to nanoparticulate benzoboroxole based receptor units. J Mol Recognit 2011; 24:953-9. [DOI: 10.1002/jmr.1142] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Soeren Schumacher
- Fraunhofer Institute for Biomedical Engineering; Am Mühlenberg 13; 14476; Potsdam; Germany
| | - Martin Katterle
- Fraunhofer Institute for Biomedical Engineering; Am Mühlenberg 13; 14476; Potsdam; Germany
| | - Cornelia Hettrich
- Fraunhofer Institute for Biomedical Engineering; Am Mühlenberg 13; 14476; Potsdam; Germany
| | - Bernd-Reiner Paulke
- Fraunhofer Institute for Applied Polymer Research; Geiselbergstr. 69; 14476; Potsdam; Germany
| | - Dennis G. Hall
- Department of Chemistry; University of Alberta; Edmonton; Alberta; T6G 2G2; Canada
| | - Frieder W. Scheller
- Fraunhofer Institute for Biomedical Engineering; Am Mühlenberg 13; 14476; Potsdam; Germany
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Mahalingam A, Geonnotti AR, Balzarini J, Kiser PF. Activity and safety of synthetic lectins based on benzoboroxole-functionalized polymers for inhibition of HIV entry. Mol Pharm 2011; 8:2465-75. [PMID: 21879735 DOI: 10.1021/mp2002957] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Lectins derived from plant and microbial sources constitute a vital class of entry inhibitors that target the oligomannose residues on the HIV envelope gp120. Despite their potency and specificity, success of lectin-based entry inhibitors may be impeded by high manufacturing costs, formulation and potential mitogenicity. Therefore, there exists a gap in the HIV microbicides pipeline that underscores the need for mass producible, synthetic, broad-spectrum, and biocomptabile inhibitors of HIV entry. Here, we present the development of a polymeric synthetic lectin, based on benzoboroxole (BzB), which exhibits weak affinity (∼25 M(-1)) for nonreducing sugars, similar to those found on the HIV envelope. High molecular weight BzB-functionalized polymers demonstrated antiviral activity that increased with an increase in ligand density and molecular weight of the polymer construct, revealing that polyvalency improves activity. Polymers showed significant increase in activity from 25 to 75 mol % BzB functionalization with EC(50) of 15 μM and 15 nM, respectively. A further increase in mole functionalization to 90% resulted in an increase of the EC(50) (59 ± 5 nM). An increase in molecular weight of the polymer at 50 mol % BzB functionalization showed a gradual but significant increase in antiviral activity, with the highest activity seen with the 382 kDa polymer (EC(50) of 1.1 ± 0.5 nM in CEM cells and 11 ± 3 nM in TZM-bl cells). Supplementing the polymer backbone with 10 mol % sulfonic acid not only increased the aqueous solubility of the polymers by at least 50-fold but also demonstrated a synergistic increase in anti-HIV activity (4.0 ± 1.5 nM in TZM-bl cells), possibly due to electrostatic interactions between the negatively charged polymer backbone and the positively charged V3-loop in the gp120. The benzoboroxole-sulfonic acid copolymers showed no decrease in activity in the presence of a seminal concentration of fructose (p > 0.05). Additionally, the copolymers exhibit minimal, if any, effect on the cellular viability, barrier properties, or cytokine levels in human reconstructed ectocervical tissue after 3 days of repeated exposure and did not show pronounced activity against a variety of other RNA and DNA viruses.
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Affiliation(s)
- Alamelu Mahalingam
- Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, Utah 84112-5820, United States
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Nishiyabu R, Kubo Y, James TD, Fossey JS. Boronic acid building blocks: tools for sensing and separation. Chem Commun (Camb) 2011; 47:1106-23. [DOI: 10.1039/c0cc02920c] [Citation(s) in RCA: 313] [Impact Index Per Article: 24.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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17
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Nishiyabu R, Kubo Y, James TD, Fossey JS. Boronic acid building blocks: tools for self assembly. Chem Commun (Camb) 2011; 47:1124-50. [DOI: 10.1039/c0cc02921a] [Citation(s) in RCA: 411] [Impact Index Per Article: 31.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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18
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Larkin JD, Fossey JS, James TD, Brooks BR, Bock CW. A computational investigation of the nitrogen-boron interaction in o-(N,N-dialkylaminomethyl)arylboronate systems. J Phys Chem A 2010; 114:12531-9. [PMID: 21050022 DOI: 10.1021/jp1087674] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
o-(N,N-Dialkylaminomethyl)arylboronate systems are an important class of compounds in diol-sensor development. We report results from a computational investigation of fourteen o-(N,N-dialkylaminomethyl)arylboronates using second-order Møller-Plesset (MP2) perturbation theory. Geometry optimizations were performed at the MP2/cc-pVDZ level and followed by single-point calculations at the MP2/aug-cc-pVDZ(cc-pVTZ) levels. These results are compared to those from density functional theory (DFT) at the PBE1PBE(PBE1PBE-D)/6-311++G(d,p)(aug-cc-pVDZ) levels, as well as to experiment. Results from continuum PCM and CPCM solvation models were employed to assess the effects of a bulk aqueous environment. Although the behavior of o-(N,N-dialkylaminomethyl) free acid and ester proved to be complicated, we were able to extract some important trends from our calculations: (1) for the free acids the intramolecular hydrogen-bonded B-O-H···N seven-membered ring conformers 12 and 16 are found to be slightly lower in energy than the dative-bonded N→B five-membered ring conformers 10 and 14 while conformers 13 and 17, with no direct boron-nitrogen interaction, are significantly higher in energy than 12 and 16; (2) for the esters where no intramolecular B-O-H···N bonded form is possible, the N→B conformers 18 and 21 are significantly lower in energy than the no-interaction forms 20 and 23; (3) H(2)O insertion reactions into the N→B structures 10, 14, 18, and 21 leading to the seven-membered intermolecular hydrogen-bonded B···OH(2)···N ring structures 11, 15, 19, and 22 are all energetically favorable.
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Affiliation(s)
- Joseph D Larkin
- National Heart, Lung, and Blood Institute, The National Institutes of Health, Building 50, Bethesda, Maryland 20851, USA
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Larkin JD, Markham GD, Milkevitch M, Brooks BR, Bock CW. Computational investigation of the oxidative deboronation of boroglycine, H2N-CH2-B(OH)2, Using H2O and H2O2. J Phys Chem A 2009; 113:11028-34. [PMID: 19810757 PMCID: PMC4219543 DOI: 10.1021/jp904149w] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We report results from a computational investigation of the oxidative deboronation of boroglycine, H2N-CH2-B(OH)2, using H2O and H2O2 as the reactive oxygen species (ROS) to yield aminomethanol, H2N-CH2-OH; these results complement our study on the protodeboronation of boroglycine to produce methylamine, H2N-CH3 (Larkin et al. J. Phys. Chem. A 2007, 111, 6489-6500). Second-order Møller-Plesset (MP2) perturbation theory with Dunning-Woon correlation-consistent (cc) basis sets were used for the calculations with comparisons made to results from density functional theory (DFT) at the PBE1PBE/6-311++G(d,p)(cc-pVDZ) levels. The effects of a bulk aqueous environment were also incorporated into the calculations employing PCM and CPCM methodology. Using H2O as the ROS, the reaction H2O + H2N-CH2-B(OH)2 --> H2N-CH2-OH + H-B(OH)2 was calculated to be endothermic; the value of DeltaH(298)(0) was +12.0 kcal/mol at the MP2(FC)/cc-pVTZ computational level in vacuo and +13.7 kcal/mol in PCM aqueous media; the corresponding value for the activation barrier, DeltaH(double dagger), was +94.3 kcal/mol relative to the separated reactants in vacuo and +89.9 kcal/mol in PCM aqueous media. In contrast, the reaction H2O2 + H2N-CH2-B(OH)2 --> H2N-CH2-OH + B(OH)3 was calculated to be highly exothermic with an DeltaH(298)(0) value of -100.9 kcal/mol at the MP2(FC)/cc-pVTZ computational level in vacuo and -99.6 kcal/mol in CPCM aqueous media; the highest-energy transition state for the multistep process associated with this reaction involved the rearrangement of H2N-CH2-B(OH)(OOH) to H2N-CH2-O-B(OH)2 with a DeltaH(double dagger) value of +23.2 kcal/mol in vacuo relative to the separated reactants. These computational results for boroglycine are in accord with the experimental observations for the deboronation of the FDA approved anticancer drug bortezomib (Velcade, PS-341), where it was found to be the principle deactivation pathway (Labutti et al. Chem. Res. Toxicol. 2006, 19, 539-546).
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Affiliation(s)
- Joseph D. Larkin
- The National Institutes of Health, National Heart, Lung, and Blood Institute, 5635 Fishers Lane, Rockville, MD 20852
| | - George D. Markham
- The Institute for Cancer Research, Fox Chase Cancer Center, 333 Cottman Avenue, Philadelphia, PA 19111
| | - Matt Milkevitch
- Department of Chemistry and Biochemistry, School of Science and Health, Philadelphia University, School House Lane and Henry Avenue, Philadelphia, PA 19144
| | - Bernard R. Brooks
- The National Institutes of Health, National Heart, Lung, and Blood Institute, 5635 Fishers Lane, Rockville, MD 20852
| | - Charles W. Bock
- Department of Chemistry and Biochemistry, School of Science and Health, Philadelphia University, School House Lane and Henry Avenue, Philadelphia, PA 19144
- The Institute for Cancer Research, Fox Chase Cancer Center, 333 Cottman Avenue, Philadelphia, PA 19111
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Zoellner JM, Zoellner RW. Uncharged analogues of the phenalenyl cation: Hartree–Fock, Møller–Plesset, and density functional computational investigations of the isomers of boraphenalene. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.theochem.2009.02.032] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Kurt M, Raci Sertbakan T, Özduran M, Karabacak M. Infrared and Raman spectrum, molecular structure and theoretical calculation of 3,4-dichlorophenylboronic acid. J Mol Struct 2009. [DOI: 10.1016/j.molstruc.2008.12.048] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Larkin JD, Bhat KL, Markham GD, Brooks BR, Schaefer HF, Bock CW. Structure of the Boronic Acid Dimer and the Relative Stabilities of Its Conformers. J Phys Chem A 2006; 110:10633-42. [PMID: 16956246 DOI: 10.1021/jp062407h] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Despite the widespread use of boronic acids in materials science and as pharmaceutical agents, many aspects of their structure and reactivity are not well understood. In this research the boronic acid dimer, [HB(OH)(2)](2), was studied by second-order Møller-Plesset (MP2) perturbation theory and coupled cluster methodology with single and double excitations (CCSD). Pople split-valence 6-31+G*, 6-311G**, and 6-311++G** and Dunning-Woon correlation-consistent cc-pVDZ, aug-cc-pVDZ, cc-pVTZ, and aug-cc-pVTZ basis sets were employed for the calculations. A doubly hydrogen-bonded conformer (1) of the dimer was consistently found to be lowest in energy; the structure of 1 was planar (C(2h)) at most computational levels employed but was significantly nonplanar (C(2)) at the MP2/6-311++G** and CCSD/6-311++G** levels, the result of an intrinsic problem with Pople-type sp-diffuse basis functions on heavy atoms. The dimerization energy, enthalpy, and free energy for the formation of (1) from the exo-endo conformer of the monomer were -10.8, -9.2, and +1.2 kcal/mol, respectively, at the MP2/aug-cc-pVTZ level. Several other hydrogen-bonded conformers of the dimer were local minima on the potential energy surface (PES) and ranged from 2 to 5 kcal/mol higher in energy than 1. Nine doubly OH-bridged conformers, in which the boron atoms were tetracoordinated, were also local minima on the PES, but they were all greater than 13 kcal/mol higher in energy than 1; doubly H-bridged structures proved to be transition states. MP2 and CCSD results were compared to those from the BLYP, B3LYP, OLYP, O3LYP, PBE1PBE, and TPSS functionals with the 6-311++G** and aug-cc-pVTZ basis sets; the PBE1PBE functional performed best relative to the MP2 and CCSD results. Self-consistent reaction field (SCRF) calculations predict that boronic acid dimerization is less favorable in solution than in vacuo.
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Affiliation(s)
- Joseph D Larkin
- Center for Computational Chemistry, University of Georgia, Athens, GA 30602, USA.
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Bhat KL, Lai JH, Markham GD, DiJulio AM, Bock CW. Amine-Catalyzed B−O−C Bond Formation: Mechanistic Insights from Density Functional Theory and Second-Order Møller−Plesset Perturbation Theory. Organometallics 2006. [DOI: 10.1021/om0509239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Krishna L. Bhat
- Department of Chemistry and Biochemistry, School of Science and Health, Philadelphia University, School House Lane and Henry Avenue, Philadelphia, Pennsylvania 19144, Department of Biochemistry, Tufts University School of Medicine, 136 Harrison Avenue, Boston, Massachusetts 02111, The Institute for Cancer Research, Fox Chase Cancer Center, 333 Cottman Avenue, Philadelphia, Pennsylvania 19111, and Department of Chemistry, Muhlenberg College, 2400 Chew Street, Allentown, Pennsylvania 18104
| | - Jack H. Lai
- Department of Chemistry and Biochemistry, School of Science and Health, Philadelphia University, School House Lane and Henry Avenue, Philadelphia, Pennsylvania 19144, Department of Biochemistry, Tufts University School of Medicine, 136 Harrison Avenue, Boston, Massachusetts 02111, The Institute for Cancer Research, Fox Chase Cancer Center, 333 Cottman Avenue, Philadelphia, Pennsylvania 19111, and Department of Chemistry, Muhlenberg College, 2400 Chew Street, Allentown, Pennsylvania 18104
| | - George D. Markham
- Department of Chemistry and Biochemistry, School of Science and Health, Philadelphia University, School House Lane and Henry Avenue, Philadelphia, Pennsylvania 19144, Department of Biochemistry, Tufts University School of Medicine, 136 Harrison Avenue, Boston, Massachusetts 02111, The Institute for Cancer Research, Fox Chase Cancer Center, 333 Cottman Avenue, Philadelphia, Pennsylvania 19111, and Department of Chemistry, Muhlenberg College, 2400 Chew Street, Allentown, Pennsylvania 18104
| | - Anthony M. DiJulio
- Department of Chemistry and Biochemistry, School of Science and Health, Philadelphia University, School House Lane and Henry Avenue, Philadelphia, Pennsylvania 19144, Department of Biochemistry, Tufts University School of Medicine, 136 Harrison Avenue, Boston, Massachusetts 02111, The Institute for Cancer Research, Fox Chase Cancer Center, 333 Cottman Avenue, Philadelphia, Pennsylvania 19111, and Department of Chemistry, Muhlenberg College, 2400 Chew Street, Allentown, Pennsylvania 18104
| | - Charles W. Bock
- Department of Chemistry and Biochemistry, School of Science and Health, Philadelphia University, School House Lane and Henry Avenue, Philadelphia, Pennsylvania 19144, Department of Biochemistry, Tufts University School of Medicine, 136 Harrison Avenue, Boston, Massachusetts 02111, The Institute for Cancer Research, Fox Chase Cancer Center, 333 Cottman Avenue, Philadelphia, Pennsylvania 19111, and Department of Chemistry, Muhlenberg College, 2400 Chew Street, Allentown, Pennsylvania 18104
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Lai JH, Liu Y, Wu W, Zhou Y, Maw HH, Bachovchin WW, Bhat KL, Bock CW. Synthesis and Structural Investigation of Internally Coordinated α-Amidoboronic Acids. J Org Chem 2005; 71:512-9. [PMID: 16408958 DOI: 10.1021/jo051757h] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[structure: see text] Six new N-acyl-boroGly derivatives, along with their N-acyl-boroSar analogues, have been synthesized by modification of conventional procedures. Structural characterization of these alpha-amidoboronic acids was accomplished by extensive use of 11B and 1H NMR spectroscopy. These compounds were prepared to determine the extent of intramolecular B-O dative bond formation within the context of a five-membered (:O=C-N-C-B) ring motif. It is shown that the formation of such dative bonds depends on the nature of the substituents at both the acyl carbon and the nitrogen atoms. Computational evidence from second-order Møller-Plesset perturbation theory is provided in support of these findings.
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Affiliation(s)
- Jack H Lai
- Department of Biochemistry, Tufts University School of Medicine, 136 Harrison Avenue, Boston, Massachusetts 02111, USA
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