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Joseph V, Levine M. Ronald C.D. Breslow (1931-2017): A career in review. Bioorg Chem 2021; 115:104868. [PMID: 34523507 DOI: 10.1016/j.bioorg.2021.104868] [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: 02/02/2021] [Accepted: 03/23/2021] [Indexed: 11/26/2022]
Abstract
Reviewed herein are key research accomplishments of Professor Ronald Charles D. Breslow (1931-2017) throughout his more than 60 year research career. These accomplishments span a wide range of topics, most notably physical organic chemistry, medicinal chemistry, and bioorganic chemistry. These topics are reviewed, as are topics of molecular electronics and origin of chirality, which combine to make up the bulk of this review. Also reviewed briefly are Breslow's contributions to the broader chemistry profession, including his work for the American Chemical Society and his work promoting gender equity. Throughout the article, efforts are made to put Breslow's accomplishments in the context of other work being done at the time, as well as to include subsequent iterations and elaborations of the research.
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Affiliation(s)
- Vincent Joseph
- Department of Chemical Sciences, Ariel University, Israel
| | - Mindy Levine
- Department of Chemical Sciences, Ariel University, Israel.
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2
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Beatty MA, Pye AT, Shaurya A, Kim B, Selinger AJ, Hof F. Using reversible non-covalent and covalent bonds to create assemblies and equilibrating molecular networks that survive 5 molar urea. Org Biomol Chem 2019; 17:2081-2086. [PMID: 30698579 DOI: 10.1039/c8ob02909a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The limits of self-assembly and host-guest chemistry in water solutions containing competitive solutes are largely unexplored. We report here a new family of self-assembling systems that are stitched together at two levels by reversible hydrazone bonds and by non-covalent self-assembly in strongly denaturing conditions. Three different hydrazides of various charge and hydrophobicity are combined with an aldehyde-containing calixarene, and each system spontaneously forms AB hydrazones that subsequently self-assemble into four-component (AB)2 structures in water. The assemblies display varying responses to added NaCl and/or urea. The most robust assembly survives completely intact in solution up to 5 M urea. We also combine the aldehyde calixarene with two different hydrazides in the same tube to create complex, competitive dynamic libraries. We report experiments in which the composition of the dynamic equilibrating library is under the control of self-assembly, allowing the systems to choose the components that form the most stable assemblies under a variety of competitive solutions conditions. These dynamic networks of equilibrating molecules maintain remarkably similar equilibrium positions under widely varying concentrations of urea and NaCl.
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Affiliation(s)
- Meagan A Beatty
- Department of Chemistry, University of Victoria, Victoria, BC V8W 3V6 Canada.
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Chaudhuri S, Verderame M, Mako TL, Bandara YMNDY, Fernando AI, Levine M. Synthetic β‐Cyclodextrin Dimers for Squaraine Binding: Effect of Host Architecture on Photophysical Properties, Aggregate Formation and Chemical Reactivity. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800283] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Sauradip Chaudhuri
- Department of Chemistry University of Rhode Island 140 Flagg Road 02881 Kingston RI USA
| | - Molly Verderame
- Department of Chemistry University of Rhode Island 140 Flagg Road 02881 Kingston RI USA
| | - Teresa L. Mako
- Department of Chemistry University of Rhode Island 140 Flagg Road 02881 Kingston RI USA
| | | | - Ashvin I. Fernando
- Department of Chemistry University of Rhode Island 140 Flagg Road 02881 Kingston RI USA
| | - Mindy Levine
- Department of Chemistry University of Rhode Island 140 Flagg Road 02881 Kingston RI USA
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4
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Affiliation(s)
- Dana J. DiScenza
- Department of Chemistry, University of Rhode Island, Kingston, RI, USA
| | - Mindy Levine
- Department of Chemistry, University of Rhode Island, Kingston, RI, USA
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Assaf KI, Ural MS, Pan F, Georgiev T, Simova S, Rissanen K, Gabel D, Nau WM. Water Structure Recovery in Chaotropic Anion Recognition: High-Affinity Binding of Dodecaborate Clusters to γ-Cyclodextrin. Angew Chem Int Ed Engl 2015; 54:6852-6. [PMID: 25951349 PMCID: PMC4510780 DOI: 10.1002/anie.201412485] [Citation(s) in RCA: 199] [Impact Index Per Article: 22.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2014] [Revised: 03/18/2015] [Indexed: 12/29/2022]
Abstract
Dodecaborate anions of the type B12X12(2-) and B12X11Y(2-) (X=H, Cl, Br, I and Y=OH, SH, NH3(+), NR3(+)) form strong (K(a) up to 10(6) L mol(-1), for B12Br12(2-)) inclusion complexes with γ-cyclodextrin (γ-CD). The micromolar affinities reached are the highest known for this native CD. The complexation exhibits highly negative enthalpies (up to -25 kcal mol(-1)) and entropies (TΔS up to -18.4 kcal mol(-1), both for B12I12(2-)), which position these guests at the bottom end of the well-known enthalpy-entropy correlation for CDs. The high driving force can be traced back to a chaotropic effect, according to which chaotropic anions have an intrinsic affinity to hydrophobic cavities in aqueous solution. In line with this argument, salting-in effects revealed dodecaborates as superchaotropic dianions.
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Affiliation(s)
- Khaleel I Assaf
- Department of Life Sciences and Chemistry, Jacobs University Bremen, Campus Ring 1, 28759 Bremen (Germany)
| | - Merve S Ural
- Department of Life Sciences and Chemistry, Jacobs University Bremen, Campus Ring 1, 28759 Bremen (Germany)
| | - Fangfang Pan
- University of Jyvaskyla, Department of Chemistry, Nanoscience Center, P.O. Box. 35, 40014 University of Jyvaskyla (Finland)
| | - Tony Georgiev
- Department of Life Sciences and Chemistry, Jacobs University Bremen, Campus Ring 1, 28759 Bremen (Germany)
| | - Svetlana Simova
- Institute of Organic Chemistry with Center of Phytochemistry, Bulgarian Academy of Science, 1113 Sofia (Bulgaria)
| | - Kari Rissanen
- University of Jyvaskyla, Department of Chemistry, Nanoscience Center, P.O. Box. 35, 40014 University of Jyvaskyla (Finland).
| | - Detlef Gabel
- Department of Life Sciences and Chemistry, Jacobs University Bremen, Campus Ring 1, 28759 Bremen (Germany).
| | - Werner M Nau
- Department of Life Sciences and Chemistry, Jacobs University Bremen, Campus Ring 1, 28759 Bremen (Germany).
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Assaf KI, Ural MS, Pan F, Georgiev T, Simova S, Rissanen K, Gabel D, Nau WM. Water Structure Recovery in Chaotropic Anion Recognition: High-Affinity Binding of Dodecaborate Clusters to γ-Cyclodextrin. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201412485] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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7
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Affiliation(s)
- Sanem Senler
- Department of Chemistry, Center for Supramolecular Science, University of Miami, Coral Gables, FL 33124-0431, USA
| | - Wei Li
- Department of Chemistry, Center for Supramolecular Science, University of Miami, Coral Gables, FL 33124-0431, USA
| | - Mohammad Hossein Tootoonchi
- Department of Chemistry, Center for Supramolecular Science, University of Miami, Coral Gables, FL 33124-0431, USA
| | - Song Yi
- Department of Chemistry, Center for Supramolecular Science, University of Miami, Coral Gables, FL 33124-0431, USA
| | - Angel E. Kaifer
- Department of Chemistry, Center for Supramolecular Science, University of Miami, Coral Gables, FL 33124-0431, USA
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Mathew A, Natarajan G, Lehtovaara L, Häkkinen H, Kumar RM, Subramanian V, Jaleel A, Pradeep T. Supramolecular functionalization and concomitant enhancement in properties of Au(25) clusters. ACS NANO 2014; 8:139-52. [PMID: 24313537 DOI: 10.1021/nn406219x] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
We present a versatile approach for tuning the surface functionality of an atomically precise 25 atom gold cluster using specific host-guest interactions between β-cyclodextrin (CD) and the ligand anchored on the cluster. The supramolecular interaction between the Au25 cluster protected by 4-(t-butyl)benzyl mercaptan, labeled Au25SBB18, and CD yielding Au25SBB18∩CDn (n = 1, 2, 3, and 4) has been probed experimentally using various spectroscopic techniques and was further analyzed by density functional theory calculations and molecular modeling. The viability of our method in modifying the properties of differently functionalized Au25 clusters is demonstrated. Besides modifying their optoelectronic properties, the CD moieties present on the cluster surface provide enhanced stability and optical responses which are crucial in view of the potential applications of these systems. Here, the CD molecules act as an umbrella which protects the fragile cluster core from the direct interaction with many destabilizing agents such as metal ions, ligands, and so on. Apart from the inherent biocompatibility of the CD-protected Au clusters, additional capabilities acquired by the supramolecular functionalization make such modified clusters preferred materials for applications, including those in biology.
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Affiliation(s)
- Ammu Mathew
- DST Unit of Nanoscience (DST UNS) and Thematic Unit of Excellence, Department of Chemistry, Indian Institute of Technology Madras , Chennai 600036, India
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Purkayastha P, Jaffer SS, Ghosh P. Physicochemical perspective of cyclodextrin nano and microaggregates. Phys Chem Chem Phys 2012; 14:5339-48. [PMID: 22428167 DOI: 10.1039/c2cp24052a] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
''Chemistry beyond the molecule'' is the nickname for supramolecular chemistry. This branch of study is based on molecular recognition that is host-guest chemistry. A number of potential hosts have been defined and applied in scores of studies. Among all potential hosts, cyclodextrins occupy a high position due to their characteristic solubilisation capability and biocompatibility. In the present article we are revisiting the host-guest aspects of cyclodextrins from a physicochemical perspective. We present details of formation and applications of cyclodextrin nanoaggregates induced by guest molecules, the concerned thermodynamics behind the process and also the effect of concentration of the guest molecules on the morphology of the aggregates. This article reviews the topic mainly from the spectroscopic point of view.
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Affiliation(s)
- Pradipta Purkayastha
- Department of Chemical Sciences, Indian Institute of Science Education and Research, Kolkata, Mohanpur 741252, WB, India.
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Legrand FX, Ménand M, Sollogoub M, Tilloy S, Monflier E. An N-heterocyclic carbene ligand based on a β-cyclodextrin–imidazolium salt: synthesis, characterization of organometallic complexes and Suzuki coupling. NEW J CHEM 2011. [DOI: 10.1039/c1nj20200f] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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11
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Jaffer SS, Purkayastha P. Steady state fluorescence spectroscopic technique to reveal the thermodynamics of fragmentation of compound induced α-cyclodextrin nanotubular suprastructures. J Colloid Interface Sci 2010; 342:57-61. [DOI: 10.1016/j.jcis.2009.10.017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2009] [Revised: 10/08/2009] [Accepted: 10/09/2009] [Indexed: 10/20/2022]
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12
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Inbar P, Bautista MR, Takayama SA, Yang J. Assay To Screen for Molecules That Associate with Alzheimer's Related β-Amyloid Fibrils. Anal Chem 2008; 80:3502-6. [DOI: 10.1021/ac702592f] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Petra Inbar
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093-0358
| | - Mahealani R. Bautista
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093-0358
| | - Stacy A. Takayama
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093-0358
| | - Jerry Yang
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093-0358
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13
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Zhao Y, Liu XQ, Gu J, Wang LQ, Zhu HY, Huang R, Wang YF, Yang ZM. Synthesis of novel bis(β-cyclodextrin)s linked with aromatic diamine and their molecular recognition with model substrates. J PHYS ORG CHEM 2008. [DOI: 10.1002/poc.1345] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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14
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Hammitzsch-Wiedemann M, Scriba GKE. Influence of buffer substances and urea on the β-cyclodextrin-mediated chiral separation of dipeptides in CE. Electrophoresis 2007; 28:2619-28. [PMID: 17592612 DOI: 10.1002/elps.200600728] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The influence of buffering substances and urea on the beta-CD-mediated chiral separations of the dipeptides Ala-Phe and Ala-Tyr was studied in the pH range of 2.5-3.8. Only minor effects of the buffer substances on the chiral separation selectivity alpha were observed at a beta-CD concentration of 15 mg/mL. In contrast, the selectivity improved at pH 2.5 but decreased at pH 3.8 upon the addition of 2 M urea. Complexation by beta-CD resulted in a shift of the pK(a) values toward higher values which was more pronounced for the DD-enantiomers of both dipeptides than for the LL-enantiomers. Addition of urea further increased the pK(a) shift. The consequence of this pK(a) shift is an increase of the fraction of the protonated, positively charged form of the peptides which explained the improved chiral separation at pH 2.5 and the reduced selectivity at pH 3.8. A pK(a) shift by the addition of urea was also observed for N-tert-butyloxycarbonyl phenylalanine (BOC-Phe) as a model compound that is strongly complexed by beta-CD. This effect was not stereospecific. Addition of urea resulted in a decrease of the apparent complexation constants between beta-CD and the BOC-Phe enantiomers to the same extent but this did not affect the separation selectivity alpha. For chiral separations that display strong pH dependence such as peptide enantioseparations close to the pK(a) values of the compounds, urea may not solely be regarded as a solubility enhancer for beta-CD but may also influence the separation.
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Liu Y, Li L, Zhang HY, Yang YW, Ding F. Correlation between Thermodynamic Behavior and Structure in the Complexation of Modified β-Cyclodextrins and Bile Salts. Supramol Chem 2007. [DOI: 10.1080/10610270410001713295] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Yu Liu
- a Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry , Nankai University , Tianjin, 300071, P. R. China
| | - Li Li
- a Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry , Nankai University , Tianjin, 300071, P. R. China
| | - Heng-Yi Zhang
- a Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry , Nankai University , Tianjin, 300071, P. R. China
| | - Ying-Wei Yang
- a Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry , Nankai University , Tianjin, 300071, P. R. China
| | - Fei Ding
- a Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry , Nankai University , Tianjin, 300071, P. R. China
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Dong Z, Li X, Liang K, Mao S, Huang X, Yang B, Xu J, Liu J, Luo G, Shen J. Telluroxides Exhibit Hydrolysis Capacity. J Org Chem 2006; 72:606-9. [PMID: 17221980 DOI: 10.1021/jo0620922] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
It has long been known that tellurium compounds are rather toxic to living organisms, and tellurium has not been found in natural biomacromolecules to date. The principles of telluride toxicity in biological processes are still controversial partly because of the lack of information on the biochemical features of tellurium. In this contribution, we report our finding for the first time that telluroxides exhibit hydrolysis capacity. For instance, 6,6'-telluroxy-bis(6-deoxy-beta-cyclodextrin) acts as a hydrolase mimic and shows a significant rate acceleration of 106,000 for the hydrolysis of 4,4'-dinitrodiphenyl carbonate.
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Affiliation(s)
- Zeyuan Dong
- Key Laboratory for Supramolecular Structure and Materials of Ministry of Education, Jilin University, Changchun 130012, People's Republic of China
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Liu Y, Chen Y. Cooperative binding and multiple recognition by bridged bis(beta-cyclodextrin)s with functional linkers. Acc Chem Res 2006; 39:681-91. [PMID: 17042468 DOI: 10.1021/ar0502275] [Citation(s) in RCA: 258] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Possessing two beta-cyclodextrin cavities in close vicinity and a functional linker with good structural variety in a single molecule, bridged bis(beta-cyclodextrin)s can significantly enhance the original binding ability and molecular selectivity of native beta-cyclodextrin and thus be successfully utilized in drug carriers, solubilizers, catalysis, photochemical materials, etc. This Account describes recent developments in the intramolecular cooperative binding and multiple recognition of bridged bis(beta-cyclodextrin)s with functional linkers in solution, as well as their molecular assembly behaviors through the intermolecular cooperative binding. It also gives a description of unique properties and wide applications of bis(beta-cyclodextrin)s and their assemblies.
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Affiliation(s)
- Yu Liu
- Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, People's Republic of China.
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Tang B, Liang HL, Tong LL, Li P. Synthesis of ethylenediamine linked β-cyclodextrin dimer and its analytical application for tranilast determination by spectrofluorimetry. Bioorg Med Chem 2006; 14:3947-52. [PMID: 16564175 DOI: 10.1016/j.bmc.2006.01.049] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2005] [Revised: 01/19/2006] [Accepted: 01/20/2006] [Indexed: 12/17/2022]
Abstract
A synthesis of beta-cyclodextrin (beta-CD) dimer, containing two beta-CD moieties that are linked through their sides by ethylenediamine, was presented. The dimer was characterized by means of IR, (1)H NMR, (13)C NMR, and elemental analysis. The inclusion complexation behavior of beta-cyclodextrin dimer with tranilast was studied in an aqueous KH(2)PO(4)-citric acid buffer solution of pH 2.00 at room temperature by spectrofluorimetry. Based on the significant enhancement of fluorescence intensity of tranilast, a spectrofluorimetric method with high sensitivity and selectivity was developed for the determination of tranilast in bulk aqueous solution in the presence of ethylenediamine beta-CD dimer. The apparent association constant of the complex was 8.39 x 10(3) L mol(-1), and the linear range was 10.8-1.40 x 10(4) ng mL(-1) with the detection limit 3.2 ng mL(-1). There was no interference from the excipients normally used in tablets and serum constituents. The proposed method was successfully applied to the determination of tranilast in serum.
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Affiliation(s)
- Bo Tang
- College of Chemistry, Chemical Engineer and Materials Science, Shandong Normal University, Jinan 250014, Shandong Province, PR China.
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An improved synthesis of disulfides linked β-cyclodextrin dimer and its analytical application for dequalinium chloride determination by spectrofluorimetry. Anal Chim Acta 2005. [DOI: 10.1016/j.aca.2005.08.048] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Liu Y, Li L, Chen Y, Yu L, Fan Z, Ding F. Molecular Recognition Thermodynamics of Bile Salts by β-Cyclodextrin Dimers: Factors Governing the Cooperative Binding of Cyclodextrin Dimers. J Phys Chem B 2005; 109:4129-34. [PMID: 16851473 DOI: 10.1021/jp045332v] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The complex stability constants (K(S)), standard molar enthalpy (DeltaH degrees), and entropy changes (DeltaS degrees) for the inclusion complexation of two families of beta-cyclodextrin (beta-CD) dimers, i.e. beta-CD dimers Se1-Se4 bearing 2,2'-diselenobis(benzoyl) tether (Se-dimers) and beta-CD dimers Py1-Py4 bearing 2,2'-bipyridine-4,4'-dicarboxy tether (Py-dimers), with four bile salt guests, i.e. sodium cholate (CA), sodium deoxycholate (DCA), sodium glycocholate (GCA), and sodium taurocholate (TCA), were determined at 25 degrees C in Tris buffer solution (pH 7.4) at 298.15 K by means of isothermal titration microcalorimetry. The thermodynamic parameters obtained, together with the ROESY spectra of interactions between beta-CD dimers and bile salts, consistently suggest that the length, flexibility, and structure of spacers linking the two beta-CD cavities not only determine the binding modes but also significantly alter the molecular selectivity of beta-CD dimers.
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Affiliation(s)
- Yu Liu
- Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, People's Republic of China.
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Liu Y, Li XQ, Chen Y, Guan XD. Spectrophotometric Study of Selective Binding Behaviors of Dye Molecules by Pyridine- and Bipyridine-Modified β-Cyclodextrin Derivatives with a Functional Tether in Aqueous Solution. J Phys Chem B 2004. [DOI: 10.1021/jp046363t] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yu Liu
- Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Xue-Qing Li
- Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Yong Chen
- Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Xu-Dong Guan
- Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, P. R. China
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Liu Y, Li L, Zhang HY, Liang P, Wang H. Inclusion complexation behavior of dyestuff guest molecules by a bridged bis(cyclomaltoheptaose)[bis(beta-cyclodextrin)] with a pyromellitic acid diamide tether. Carbohydr Res 2003; 338:1751-7. [PMID: 12892942 DOI: 10.1016/s0008-6215(03)00268-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
A novel bridged bis(beta-cyclodextrin) with a pyromellitic acid 2,5-diamide tether (2) has been synthesized by reaction of 6(I)-(2-aminoethyleneamino)-6-deoxycyclomaltoheptaose [mono 6-(2-aminoethyleneamino)-6-deoxy-beta-cyclodextrin] with 1,2,4,5-benzenetetracarboxylic dianhydride. Its inclusion complexation behavior with some representative dyestuffs, i.e., Acridine Red (AR), Rhodamine B (RhB), Neutral Red (NR), Brilliant Green (BG), was studied by using UV-absorption, fluorescence, and 2D NMR spectroscopy. Fluorescence titrations have been performed at 25 degrees C in pH 7.2 buffer solution to calculate the binding constants of resulting complexes. These results obtained indicated that bis(beta-cyclodextrin) 2 exhibits the strongly enhanced binding ability with all dye molecules examined compared with natural cyclodextrins. The binding modes of 2 with dye molecules have been deduced by 2D NMR experiments to establish the correlations between molecular conformations and binding constants of inclusion complexation. It is found that the improved binding ability and molecular selectivity of 2 could be attributed to double-cavity cooperative inclusion interaction and the size/shape matching between the host and guest.
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Affiliation(s)
- Yu Liu
- Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Weijin Road 94, Tianjin 300071, PR China.
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Bartlett PA, Yusuff N, Rico AC, Lindvall MK. Antihydrophobic solvent effects: an experimental probe for the hydrophobic contribution to enzyme-inhibitor binding. J Am Chem Soc 2002; 124:3853-7. [PMID: 11942821 DOI: 10.1021/ja012483s] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The hydrophobic component to the binding affinities of one acyclic phosphinate (4) and three macrocyclic phosphonamidate inhibitors (1-3) to the zinc peptidase thermolysin was probed by varying the solvent composition. Increasing the percentage of ethanol in the buffer solution over the range 0-9% increases the inhibition constants, K(i), by up to an order of magnitude. This approach represents an experimental method for distinguishing solvation from conformational or other effects on protein-ligand binding. The size of the "antihydrophobic effect" is correlated with the amount of hydrophobic surface area sequestered from solvent on association of the inhibitor and enzyme, although it is attenuated from that calculated from the surface tension of ethanol-water mixtures. The results are consistent with the Lum-Chandler-Weeks explanation for the size dependence of the hydrophobic effect.
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Affiliation(s)
- Paul A Bartlett
- Department of Chemistry, University of California, Berkeley, California 94720-1460, USA.
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25
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Varady J, Wu X, Wang S. Competitive and Reversible Binding of a Guest Molecule to Its Host in Aqueous Solution through Molecular Dynamics Simulation: Benzyl Alcohol/β-Cyclodextrin System. J Phys Chem B 2002. [DOI: 10.1021/jp0131469] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Judith Varady
- Departments of Internal Medicine and Medicinal Chemistry, University of Michigan, 3-316 CCGC Box 0934, 1500 E. Medical Center Drive, Ann Arbor, Michigan 48109-0934
| | - Xiongwu Wu
- Departments of Internal Medicine and Medicinal Chemistry, University of Michigan, 3-316 CCGC Box 0934, 1500 E. Medical Center Drive, Ann Arbor, Michigan 48109-0934
| | - Shaomeng Wang
- Departments of Internal Medicine and Medicinal Chemistry, University of Michigan, 3-316 CCGC Box 0934, 1500 E. Medical Center Drive, Ann Arbor, Michigan 48109-0934
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26
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Abstract
Nucleophilic addition of 4-methoxy-alpha-toluenethiol to capped cyclodextrins followed by deprotection in TFA affords cyclodextrin dithiols in good yields with no disulfide formation and requires only minimal purification.
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Affiliation(s)
- Jerry Yang
- Department of Chemistry, Columbia University, New York, NY 10027, USA.
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27
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Liu Y, You CC, Li B. Synthesis and molecular recognition of novel oligo(ethylenediamino) bridged bis(beta-cyclodextrin)s and their copper(II) complexes: enhanced molecular binding ability and selectivity by multiple recognition. Chemistry 2001; 7:1281-8. [PMID: 11322555 DOI: 10.1002/1521-3765(20010316)7:6<1281::aid-chem1281>3.0.co;2-h] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Four bridged bis(beta-cyclodextrin)s tethered by different lengths of oligo(ethylenediamine)s have been synthesized and their inclusion complexation behavior with selected substrates elucidated by circular dichroism spectroscopy and fluorescence decay. In order to study their binding ability quantitatively, inclusion complexation stability constants with four dye guests, that is, brilliant green (BG), methyl orange (MO), ammonium 8-anilino-1-naphthalenesulfonic acid (ANS), and sodium 6-(p-toluidino)-2-naphthalenesulfonate (TNS), have been determined in aqueous solution at 25 degrees C with spectrophotometric, spectropolarimetric, or spectrofluorometric titrations. The results obtained indicate that the two tethered cyclodextrin units might cooperatively bind to a guest, and the molecular binding ability toward model substrates, especially linear guests such as TNS and MO, could be extended. The tether length plays a crucial role in the molecular recognition, the binding constants for ANS and TNS decrease linearly with an increase in the tether length of dimeric cyclodextrin. The Gibbs free energy changes (-deltaGo) for the unit increment per ethylene are 0.99 kJ mol(-1) for ANS and 0.44 kJmol(-1) for TNS, respectively. On the other hand, the presence of a copper(II) ion in metallobis(beta-cyclodextrin)s oligo(ethylenediamino) tethers enhances not only the original binding ability, but also the molecular selectivity through triple or multiple recognition, as compared with the parent bis(beta-cyclodextrin)s.
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Affiliation(s)
- Y Liu
- Department of Chemistry, Nankai University, Tianjin, PR China.
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28
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Tastan P, Akkaya EU. A novel cyclodextrin homodimer with dual-mode substrate binding and esterase activity. ACTA ACUST UNITED AC 2000. [DOI: 10.1016/s1381-1169(00)00159-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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29
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Pawar SS, Phalgune U, Kumar A. Ionic Effects on the Stereoselectivities of Diels−Alder Reactions: The Cyclopentadiene−Methyl Acrylate Reaction in Aqueous LiCl, NaCl, NaBr, CaCl2, LiClO4, and Guanidinium Chloride. J Org Chem 1999. [DOI: 10.1021/jo990583z] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sanjay S. Pawar
- Physical Chemistry Division, National Chemical Laboratory, Pune 411 008, India
| | - Usha Phalgune
- Physical Chemistry Division, National Chemical Laboratory, Pune 411 008, India
| | - Anil Kumar
- Physical Chemistry Division, National Chemical Laboratory, Pune 411 008, India
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30
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Affiliation(s)
- Dragos Vizitiu
- Department of Chemistry, Queen's University, Kingston, Ontario K7L 3N6, Canada
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31
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Breslow R, Groves K, Mayer MU. Antihydrophobic cosolvent effects in organic displacement reactions. Org Lett 1999; 1:117-20. [PMID: 10822546 DOI: 10.1021/ol990037s] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[formula: see text] Rates of reactions in water can be modified by the presence of antihydrophobic cosolvents such as ethanol and DMSO, which lower the energies of nonpolar surfaces. The rate effects reflect changes both in the solvation of nonpolar surfaces and also in the solvation of polar groups. The effects have been sorted out for some displacement reactions, revealing the geometry of an interesting branching reaction whose two paths show different antihydrophobic effects.
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Affiliation(s)
- R Breslow
- Department of Chemistry, Columbia University, New York, New York 10027, USA.
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32
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Shen X, Belletête M, Durocher G. Spectral and Photophysical Studies of the 1:3 (Guest/Host) Rotaxane-like Inclusion Complex Formed by a 3H-Indole and β-Cyclodextrin. J Phys Chem B 1998. [DOI: 10.1021/jp9726854] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xinghai Shen
- Département de Chimie, Université de Montréal, C.P. 6128, Succ. A, Montréal, Québec, H3C 3J7, Canada
| | - Michel Belletête
- Département de Chimie, Université de Montréal, C.P. 6128, Succ. A, Montréal, Québec, H3C 3J7, Canada
| | - Gilles Durocher
- Département de Chimie, Université de Montréal, C.P. 6128, Succ. A, Montréal, Québec, H3C 3J7, Canada
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33
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Shen X, Belletête M, Durocher G. Quantitative Study of the Hydrophobic Interaction Mechanism between Urea and Molecular Probes Used in Sensing Some Microheterogeneous Media. J Phys Chem B 1997. [DOI: 10.1021/jp9703216] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xinghai Shen
- Département de chimie, Université de Montréal, C.P. 6128, Succ. A, Montréal, Québec, H3C 3J7, Canada
| | - Michel Belletête
- Département de chimie, Université de Montréal, C.P. 6128, Succ. A, Montréal, Québec, H3C 3J7, Canada
| | - Gilles Durocher
- Département de chimie, Université de Montréal, C.P. 6128, Succ. A, Montréal, Québec, H3C 3J7, Canada
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34
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Affiliation(s)
- Kenneth A. Connors
- School of Pharmacy, University of Wisconsin, 425 North Charter Street, Madison, Wisconsin 53706
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35
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Godínez LA, Schwartz L, Criss CM, Kaifer AE. Thermodynamic Studies on the Cyclodextrin Complexation of Aromatic and Aliphatic Guests in Water and Water−Urea Mixtures. Experimental Evidence for the Interaction of Urea with Arene Surfaces. J Phys Chem B 1997. [DOI: 10.1021/jp970359i] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Luis A. Godínez
- Chemistry Department, University of Miami, Coral Gables, Florida 33124-0431
| | - Lauren Schwartz
- Chemistry Department, University of Miami, Coral Gables, Florida 33124-0431
| | - Cecil M. Criss
- Chemistry Department, University of Miami, Coral Gables, Florida 33124-0431
| | - Angel E. Kaifer
- Chemistry Department, University of Miami, Coral Gables, Florida 33124-0431
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36
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Zhang B, Breslow R. Ester Hydrolysis by a Catalytic Cyclodextrin Dimer Enzyme Mimic with a Metallobipyridyl Linking Group. J Am Chem Soc 1997. [DOI: 10.1021/ja963769d] [Citation(s) in RCA: 146] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Biliang Zhang
- Contribution from the Department of Chemistry, Columbia University, New York, New York 10027
| | - Ronald Breslow
- Contribution from the Department of Chemistry, Columbia University, New York, New York 10027
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37
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Haskard CA, Easton CJ, May BL, Lincoln SF. Cooperative Binding of 6-(p-Toluidinyl)naphthalene-2-sulfonate by β-Cyclodextrin Dimers. ACTA ACUST UNITED AC 1996. [DOI: 10.1021/jp960701b] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Carolyn A. Haskard
- Department of Chemistry, University of Adelaide, South Australia 5005, Australia, and Research School of Chemistry, Australian National University, Canberra, ACT 0200, Australia
| | - Christopher J. Easton
- Department of Chemistry, University of Adelaide, South Australia 5005, Australia, and Research School of Chemistry, Australian National University, Canberra, ACT 0200, Australia
| | - Bruce L. May
- Department of Chemistry, University of Adelaide, South Australia 5005, Australia, and Research School of Chemistry, Australian National University, Canberra, ACT 0200, Australia
| | - Stephen F. Lincoln
- Department of Chemistry, University of Adelaide, South Australia 5005, Australia, and Research School of Chemistry, Australian National University, Canberra, ACT 0200, Australia
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38
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Liao Y, Bohne C. Alcohol Effect on Equilibrium Constants and Dissociation Dynamics of Xanthone−Cyclodextrin Complexes. ACTA ACUST UNITED AC 1996. [DOI: 10.1021/jp951697r] [Citation(s) in RCA: 97] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yuan Liao
- Department of Chemistry, University of Victoria, P.O. Box 3055, Victoria, B.C., Canada V8W 3P6
| | - Cornelia Bohne
- Department of Chemistry, University of Victoria, P.O. Box 3055, Victoria, B.C., Canada V8W 3P6
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39
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Beeson JC, Czarnik AW. Synthesis and transacylating reactivity of beta-cyclodextrin ethylenediamines. Bioorg Med Chem 1994; 2:297-303. [PMID: 7922140 DOI: 10.1016/s0968-0896(00)82172-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The synthesis of the ethylenediamine-connected cyclodextrin dimer is reported, together with the syntheses of several reference cyclodextrinylamines. Each compound displayed enhanced transacylation or transphosphorylation of activated substrates, with the primary amine-bearing monocyclodextrin compound showing the greatest activity. No special rate advantage was observed for this cyclodextrin dimer, although such effects do exist in other cycloextrin dimers reported previously.
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Affiliation(s)
- J C Beeson
- Department of Chemistry, Ohio State University, Columbus 43210
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