1
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Surina A, Eigner V, Krupička M, Lhoták P. Regioselective Lithiation of Tetrabromocalix[4]arenes: A Simple Way for the Desymmetrization of the Macrocyclic Skeleton. J Org Chem 2022; 87:10080-10089. [PMID: 35797454 DOI: 10.1021/acs.joc.2c01055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Desymmetrization of persubstituted calix[4]arenes represents an interesting way to yield distally disubstituted derivatives. The reaction of tetrabrominated calixarenes in three different conformations (cone, partial cone, and 1,3-alternate) with an excess of n-BuLi surprisingly leads with high selectivity to distally dilithiated derivatives that, by reaction with electrophiles, give substitution patterns which are difficult to obtain by other ways. Using a combination of synthetic and theoretical approaches (DFT), we tried to demonstrate the usefulness of this method and provide a possible explanation for this unexpected selectivity.
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Affiliation(s)
- Anastasia Surina
- Department of Organic Chemistry, University of Chemistry and Technology, Prague (UCTP), Technická 5, Prague 6 166 28, Czech Republic
| | - Václav Eigner
- Department of Solid State Chemistry, UCTP, Prague 6 166 28, Czech Republic
| | - Martin Krupička
- Department of Organic Chemistry, University of Chemistry and Technology, Prague (UCTP), Technická 5, Prague 6 166 28, Czech Republic
| | - Pavel Lhoták
- Department of Organic Chemistry, University of Chemistry and Technology, Prague (UCTP), Technická 5, Prague 6 166 28, Czech Republic
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2
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Horáčková T, Budka J, Eigner V, Chung WS, Cuřínová P, Lhoták P. Chiral anion recognition using calix[4]arene-based ureido receptors in a 1,3-alternate conformation. Beilstein J Org Chem 2020; 16:2999-3007. [PMID: 33363668 PMCID: PMC7736684 DOI: 10.3762/bjoc.16.249] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Accepted: 11/24/2020] [Indexed: 11/23/2022] Open
Abstract
The introduction of chiral alkyl substituents into the lower rim of calix[4]arene immobilised in the 1,3-alternate conformation led to a system possessing a preorganised ureido cavity hemmed with chiral alkyl units in the near proximity. As shown by the 1H NMR titration experiments, these compounds can be used as receptors for chiral anions in DMSO-d 6. The chiral recognition ability can be further strengthened by the introduction of another chiral moiety directly onto the urea N atoms. The systems with double chiral units being located around the binding ureido cavity showed better stereodiscrimination, with the highest selectivity factor being 3.33 (K L/K D) achieved for N-acetyl-ʟ-phenylalaninate. The structures of some receptors were confirmed by single crystal X-ray analysis.
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Affiliation(s)
- Tereza Horáčková
- Department of Organic Chemistry, University of Chemistry and Technology, Prague (UCTP), Technicka 5, 166 28 Prague 6, Czech Republic
| | - Jan Budka
- Department of Organic Chemistry, University of Chemistry and Technology, Prague (UCTP), Technicka 5, 166 28 Prague 6, Czech Republic
| | - Vaclav Eigner
- Department of Solid State Chemistry, UCTP, 166 28 Prague 6, Czech Republic
| | - Wen-Sheng Chung
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu, 30050, Taiwan
| | - Petra Cuřínová
- Institute of Chemical Process Fundamentals of Czech Academy of Sciences v.v.i., Rozvojová 135, 165 02 Prague 6, Czech Republic
| | - Pavel Lhoták
- Department of Organic Chemistry, University of Chemistry and Technology, Prague (UCTP), Technicka 5, 166 28 Prague 6, Czech Republic
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3
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Miranda AS, Serbetci D, Marcos PM, Ascenso JR, Berberan-Santos MN, Hickey N, Geremia S. Ditopic Receptors Based on Dihomooxacalix[4]arenes Bearing Phenylurea Moieties With Electron-Withdrawing Groups for Anions and Organic Ion Pairs. Front Chem 2019; 7:758. [PMID: 31781541 PMCID: PMC6857623 DOI: 10.3389/fchem.2019.00758] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Accepted: 10/22/2019] [Indexed: 11/15/2022] Open
Abstract
Two bidentate dihomooxacalix[4]arene receptors bearing phenylurea moieties substituted with electron-withdrawing groups at the lower rim via a butyl spacer (CF3-Phurea 5b and NO2 Phurea 5c) were obtained in the cone conformation in solution, as shown by NMR. The X-ray crystal structure of 5b is reported. The binding affinity of these receptors toward several relevant anions was investigated by 1H NMR, UV-Vis absorption in different solvents, and fluorescence titrations. Compounds 5b and 5c were also tested as ditopic receptors for organic ion pairs, namely monoamine neurotransmitters and trace amine hydrochlorides by 1H NMR studies. The data showed that both receptors follow the same trend and, in comparison with the unsubstituted phenylurea 5a, they exhibit a significant enhancement on their host-guest properties, owing to the increased acidity of their urea NH protons. NO2-Phurea 5c is the best anion receptor, displaying the strongest complexation for F−, closely followed by the oxoanions BzO−, AcO−, and HSO4-. Concerning ion pair recognition, both ditopic receptors presented an outstanding efficiency for the amine hydrochlorides, mainly 5c, with association constants higher than 109 M−2 in the case of phenylethylamine and tyramine.
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Affiliation(s)
- Alexandre S Miranda
- Centro de Química Estrutural, Faculdade de Ciências da Universidade de Lisboa, Lisbon, Portugal.,Centro de Química-Física Molecular, Institute of Nanoscience and Nanotechnology (IN) and IBB-Institute for Bioengineering and Biosciences, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - Defne Serbetci
- Centro de Química Estrutural, Faculdade de Ciências da Universidade de Lisboa, Lisbon, Portugal
| | - Paula M Marcos
- Centro de Química Estrutural, Faculdade de Ciências da Universidade de Lisboa, Lisbon, Portugal.,Faculdade de Farmácia da Universidade de Lisboa, Lisbon, Portugal
| | - José R Ascenso
- Centro de Química Estrutural, Instituto Superior Técnico, Lisbon, Portugal
| | - Mário N Berberan-Santos
- Centro de Química-Física Molecular, Institute of Nanoscience and Nanotechnology (IN) and IBB-Institute for Bioengineering and Biosciences, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - Neal Hickey
- Department of Chemical and Pharmaceutical Sciences, Centre of Excellence in Biocrystallography, University of Trieste, Trieste, Italy
| | - Silvano Geremia
- Department of Chemical and Pharmaceutical Sciences, Centre of Excellence in Biocrystallography, University of Trieste, Trieste, Italy
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4
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Augusto AS, Miranda AS, Ascenso JR, Miranda MQ, Félix V, Brancatelli G, Hickey N, Geremia S, Marcos PM. Anion Recognition by Partial Cone Dihomooxacalix[4]arene-Based Receptors Bearing Urea Groups: Remarkable Affinity for Benzoate Ion. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800880] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Ana S. Augusto
- Centro de Química Estrutural; Faculdade de Ciências da Universidade de Lisboa; Edifício C8 1749-016 Lisboa Portugal
| | - Alexandre S. Miranda
- Centro de Química Estrutural; Faculdade de Ciências da Universidade de Lisboa; Edifício C8 1749-016 Lisboa Portugal
| | - José R. Ascenso
- Centro de Química Estrutural; Instituto Superior Técnico; Complexo I; Av. Rovisco Pais 1049-001 Lisboa Portugal
| | - Margarida Q. Miranda
- Department of Chemistry; CICECO - Aveiro Institute of Materials University of Aveiro; 3810-193 Aveiro Portugal
| | - Vítor Félix
- Department of Chemistry; CICECO - Aveiro Institute of Materials University of Aveiro; 3810-193 Aveiro Portugal
| | - Giovanna Brancatelli
- Centre of Excellence in Biocrystallography; Department of Chemical and Pharmaceutical Sciences; University of Trieste; Via L. Giorgieri 1 34127 Trieste Italy
| | - Neal Hickey
- Centre of Excellence in Biocrystallography; Department of Chemical and Pharmaceutical Sciences; University of Trieste; Via L. Giorgieri 1 34127 Trieste Italy
| | - Silvano Geremia
- Centre of Excellence in Biocrystallography; Department of Chemical and Pharmaceutical Sciences; University of Trieste; Via L. Giorgieri 1 34127 Trieste Italy
| | - Paula M. Marcos
- Centro de Química Estrutural; Faculdade de Ciências da Universidade de Lisboa; Edifício C8 1749-016 Lisboa Portugal
- Faculdade de Farmácia da Universidade de Lisboa; Av. Prof. Gama Pinto 1649-003 Lisboa Portugal
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5
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Teixeira FA, Marcos PM, Ascenso JR, Brancatelli G, Hickey N, Geremia S. Selective Binding of Spherical and Linear Anions by Tetraphenyl(thio)urea-Based Dihomooxacalix[4]arene Receptors. J Org Chem 2018; 82:11383-11390. [PMID: 28990384 DOI: 10.1021/acs.joc.7b01801] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Three novel tetra(thio)ureido dihomooxacalix[4]arene anion receptors (phenylurea 4a, phenylthiourea 4b, and tert-butylurea 4c) were synthesized and obtained in the cone conformation in solution, as shown by NMR studies. The X-ray crystal structure of 4c is reported. The host-guest properties of these receptors toward several anions were investigated by 1H NMR titrations. Phenylurea 4a displayed a very efficient binding toward the spherical F- and Cl- anions, and the linear CN- (log Kass = 3.46, 3.50, and 4.02, respectively). In comparison to related bidentate phenylurea dihomooxacalix[4]arenes, tetraphenylurea 4a is more preorganized and the higher number of hydrogen bond donor sites provides a remarkable enhancement of its binding efficiency.
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Affiliation(s)
- Filipa A Teixeira
- Centro de Química Estrutural, Faculdade de Ciências da Universidade de Lisboa , Edifício C8, 1749-016 Lisboa, Portugal
| | - Paula M Marcos
- Centro de Química Estrutural, Faculdade de Ciências da Universidade de Lisboa , Edifício C8, 1749-016 Lisboa, Portugal.,Faculdade de Farmácia da Universidade de Lisboa , Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal
| | - José R Ascenso
- Instituto Superior Técnico, CQE , Complexo I, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Giovanna Brancatelli
- Centre of Excellence in Biocrystallography, Department of Chemical and Pharmaceutical Sciences, University of Trieste , via L. Giorgieri 1, 34127 Trieste, Italy
| | - Neal Hickey
- Centre of Excellence in Biocrystallography, Department of Chemical and Pharmaceutical Sciences, University of Trieste , via L. Giorgieri 1, 34127 Trieste, Italy
| | - Silvano Geremia
- Centre of Excellence in Biocrystallography, Department of Chemical and Pharmaceutical Sciences, University of Trieste , via L. Giorgieri 1, 34127 Trieste, Italy
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6
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Vavilova AA, Stoikov II. p- tert-Butylthiacalix[4]arenes functionalized by N-(4'-nitrophenyl)acetamide and N, N-diethylacetamide fragments: synthesis and binding of anionic guests. Beilstein J Org Chem 2017; 13:1940-1949. [PMID: 29062412 PMCID: PMC5629390 DOI: 10.3762/bjoc.13.188] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Accepted: 08/24/2017] [Indexed: 11/23/2022] Open
Abstract
New p-tert-butylthiacalix[4]arenes, which are mono-, 1,2-di- and tetrasubstituted at the lower rim containing N-(4'-nitrophenyl)acetamide and N,N-diethylacetamide groups in cone and partial cone conformations have been synthesized. Their complexation ability towards a number of tetrabutylammonium salts n-Bu4NX (X = F-, Cl-, Br-, I-, CH3CO2-, H2PO4-, NO3-) was studied by UV spectroscopy. The effective receptor for the anions studied as well as selective receptors for F-, CH3CO2- and H2PO4- ions, which based on the synthesized thiacalix[4]arenes, have been obtained. It was shown that p-tert-butylthiacalix[4]arene tetrasubstituted at the lower rim by N-(4'-nitrophenyl)acetamide moieties bonded to the anions studied with association constants within the range of 3.55 × 103-7.94 × 105 M-1. Besides, the binding selectivity for F-, Cl-, CH3CO2-, and H2PO4- anions against other anions was in the range of 4.1-223.9. Substituting one or two fragments in the macrocycle with N,N-diethylacetamide groups significantly reduces the complexation ability of the receptor. In contrast to the 1,3-disubstituted macrocycle containing two N-(4'-nitrophenyl)acetamide moieties, the 1,2-disubstituted thiacalix[4]arene, which contains only one such fragment and a N,N-diethylacetamide moiety, selectively binds F- anions.
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Affiliation(s)
- Alena A Vavilova
- Kazan Federal University, Kremlevskaya, 18, Kazan 420008, Russian Federation
| | - Ivan I Stoikov
- Kazan Federal University, Kremlevskaya, 18, Kazan 420008, Russian Federation
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7
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Řezanková M, Budka J, Mikšátko J, Eigner V, Císařová I, Cuřínová P, Lhoták P. Anion receptors based on intramolecularly bridged calix[4]arenes bearing ureido functions. Tetrahedron 2017. [DOI: 10.1016/j.tet.2016.12.054] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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8
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Vavilova AA, Nosov RV, Stoikov II. Selective fluoride ion recognition by a thiacalix[4]arene receptor containing N-(4-nitrophenyl)acetamide and 1-amidoanthraquinone fragments. MENDELEEV COMMUNICATIONS 2016. [DOI: 10.1016/j.mencom.2016.11.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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9
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Klejch T, Slavíček J, Hudeček O, Eigner V, Gutierrez NA, Cuřínová P, Lhoták P. Calix[4]arenes containing a ureido functionality on the lower rim as highly efficient receptors for anion recognition. NEW J CHEM 2016. [DOI: 10.1039/c6nj01271j] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Calix[4]arenes bearing diaryl urea moieties with electron-withdrawing substituents on both sides can bind selected anions (AcO−, BzO−, H2PO4−) even in highly competitive solvents such as DMSO-d6.
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Affiliation(s)
- Tomáš Klejch
- Department of Organic Chemistry
- University of Chemistry and Technology Prague (UCTP)
- Technická 5
- 166 28 Prague 6
- Czech Republic
| | - Jan Slavíček
- Department of Organic Chemistry
- University of Chemistry and Technology Prague (UCTP)
- Technická 5
- 166 28 Prague 6
- Czech Republic
| | - Oldřich Hudeček
- Department of Organic Chemistry
- University of Chemistry and Technology Prague (UCTP)
- Technická 5
- 166 28 Prague 6
- Czech Republic
| | - Václav Eigner
- Department of Solid State Chemistry
- UCTP
- Technická 5
- 166 28 Prague 6
- Czech Republic
| | - Natalia Andrea Gutierrez
- Institute of Chemical Process Fundamentals of the AS CR
- v.v.i., Rozvojová 2/135
- 16502 Prague 6
- Czech Republic
| | - Petra Cuřínová
- Institute of Chemical Process Fundamentals of the AS CR
- v.v.i., Rozvojová 2/135
- 16502 Prague 6
- Czech Republic
| | - Pavel Lhoták
- Department of Organic Chemistry
- University of Chemistry and Technology Prague (UCTP)
- Technická 5
- 166 28 Prague 6
- Czech Republic
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10
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Martínez-González E, Armendáriz-Vidales G, Ascenso JR, Marcos PM, Frontana C. Site-Specific Description of the Enhanced Recognition Between Electrogenerated Nitrobenzene Anions and Dihomooxacalix[4]arene Bidentate Ureas. J Org Chem 2015; 80:4581-9. [PMID: 25843693 DOI: 10.1021/acs.joc.5b00441] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Electron transfer controlled hydrogen bonding was studied for a series of nitrobenzene derivative radical anions, working as large guest anions, and substituted ureas, including dihomooxacalix[4]arene bidentate urea derivatives, in order to estimate binding constants (Kb) for the hydrogen-bonding process. Results showed enhanced Kb values for the interaction with phenyl-substituted bidentate urea, which is significantly larger than for the remaining compounds, e.g., in the case of 4-methoxynitrobenzene a 28-fold larger Kb value was obtained for the urea bearing a phenyl (Kb ∼ 6888) vs tert-butyl (Kb ∼ 247) moieties. The respective nucleophilic and electrophilic characters of the participant anion radical and urea hosts were parametrized with global and local electrodonating (ω(-)) and electroaccepting (ω(+)) powers, derived from DFT calculations. ω(-) data were useful for describing trends in structure–activity relationships when comparing nitrobenzene radical anions. However, ω(+) for the host urea structures lead to unreliable explanations of the experimental data. For the latter case, local descriptors ωk(+)(r) were estimated for the atoms within the urea region in the hosts [∑kωk(+)(r)]. By compiling all the theoretical and experimental data, a Kb-predictive contour plot was built considering ω(-) for the studied anion radicals and ∑kωk(+)(r) which affords good estimations.
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Affiliation(s)
- Eduardo Martínez-González
- †Centro de Investigación y Desarrollo Tecnológico en Electroquímica, Parque Tecnológico Querétaro Sanfandila, 76703 Sanfandila, Pedro Escobedo, Querétaro, Mexico
| | - Georgina Armendáriz-Vidales
- †Centro de Investigación y Desarrollo Tecnológico en Electroquímica, Parque Tecnológico Querétaro Sanfandila, 76703 Sanfandila, Pedro Escobedo, Querétaro, Mexico
| | - José R Ascenso
- ‡Centro de Química Estrutural, Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Paula M Marcos
- §Centro de Química Estrutural, Faculdade de Ciências da Universidade de Lisboa, Edifício C8, 1749-016 Lisboa, Portugal
| | - Carlos Frontana
- †Centro de Investigación y Desarrollo Tecnológico en Electroquímica, Parque Tecnológico Querétaro Sanfandila, 76703 Sanfandila, Pedro Escobedo, Querétaro, Mexico
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11
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Marcos PM, Teixeira FA, Segurado MA, Ascenso JR, Bernardino RJ, Brancatelli G, Geremia S. Synthesis and anion binding properties of new dihomooxacalix[4]arene diurea and dithiourea receptors. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.07.020] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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12
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Madhuprasad, Trivedi DR. Receptor with an Active Methylene Group as Binding Site for Extraction of Inorganic Fluoride Ions from Seawater. Chempluschem 2014. [DOI: 10.1002/cplu.201402018] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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13
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Marcos PM, Teixeira FA, Segurado MAP, Ascenso JR, Bernardino RJ, Michel S, Hubscher-Bruder V. Bidentate urea derivatives of p-tert-butyldihomooxacalix[4]arene: neutral receptors for anion complexation. J Org Chem 2014; 79:742-51. [PMID: 24358937 DOI: 10.1021/jo4026012] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Three new bidentate ureidodihomooxacalix[4]arene derivatives (phenyl 5a, n-propyl 5b, and tert-butyl 5c) were synthesized in four steps from the parent compound p-tert-butyldihomooxacalix[4]arene and obtained in the cone conformation, as shown by NMR studies. The binding ability of these neutral receptors toward spherical, linear, trigonal planar, and tetrahedrical anions was assessed by (1)H NMR and UV-vis titrations. The structures and complexation energies of some complexes were also studied by DFT methods. The data showed that the association constants are strongly dependent on the nature of the substituent (aryl/alkyl) at the urea moiety. In general, for all the receptors, the association constants decrease with decrease of anion basicity. Ph-urea 5a is the best anion receptor, showing the strongest complexation for F(-) (log K(assoc) = 3.10 in CDCl3) and also high binding affinity for the carboxylates AcO(-) and BzO(-). Similar results were obtained by UV-vis studies and were also corroborated by DFT calculations.
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Affiliation(s)
- Paula M Marcos
- Centro de Ciências Moleculares e Materiais, Faculdade de Ciências da Universidade de Lisboa , Edifício C8, 1749-016 Lisboa, Portugal
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14
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Botha F, Budka J, Eigner V, Hudeček O, Vrzal L, Císařová I, Lhoták P. Recognition of chiral anions using calix[4]arene-based ureido receptor in the 1,3-alternate conformation. Tetrahedron 2014. [DOI: 10.1016/j.tet.2013.11.030] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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15
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Hudeček O, Budka J, Dvořáková H, Cuřínová P, Císařová I, Lhoták P. Anion receptors based on ureidocalix[4]arenes immobilised in the partial cone conformation. NEW J CHEM 2013. [DOI: 10.1039/c2nj40724h] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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16
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17
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Van Rossom W, Caers J, Robeyns K, Van Meervelt L, Maes W, Dehaen W. (Thio)ureido Anion Receptors Based on a 1,3-Alternate Oxacalix[2]arene[2]pyrimidine Scaffold. J Org Chem 2012; 77:2791-7. [DOI: 10.1021/jo300004p] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Wim Van Rossom
- Molecular
Design and Synthesis,
Department of Chemistry, Katholieke Universiteit Leuven (KU Leuven), Celestijnenlaan 200F, 3001 Leuven, Belgium
| | - Jef Caers
- Molecular
Design and Synthesis,
Department of Chemistry, Katholieke Universiteit Leuven (KU Leuven), Celestijnenlaan 200F, 3001 Leuven, Belgium
| | - Koen Robeyns
- Biomolecular Architecture, Department
of Chemistry, Katholieke Universiteit Leuven (KU Leuven), Celestijnenlaan 200F, 3001 Leuven, Belgium
- Institute of Condensed Matter
and Nanosciences (IMCN), Université Catholique de Louvain (UCL), Bâtiment Lavoisier, place Louis
Pasteur 1, bte 3, 1348 Louvain-la-Neuve, Belgium
| | - Luc Van Meervelt
- Biomolecular Architecture, Department
of Chemistry, Katholieke Universiteit Leuven (KU Leuven), Celestijnenlaan 200F, 3001 Leuven, Belgium
| | - Wouter Maes
- Molecular
Design and Synthesis,
Department of Chemistry, Katholieke Universiteit Leuven (KU Leuven), Celestijnenlaan 200F, 3001 Leuven, Belgium
- Design & Synthesis of Organic Semiconductors (DSOS), Institute for Materials Research (IMO-IMOMEC), Hasselt University, Agoralaan 1 − Building D, 3590 Diepenbeek, Belgium
| | - Wim Dehaen
- Molecular
Design and Synthesis,
Department of Chemistry, Katholieke Universiteit Leuven (KU Leuven), Celestijnenlaan 200F, 3001 Leuven, Belgium
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18
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Flídrová K, Tkadlecová M, Lang K, Lhoták P. Anion recognition by calix[4]arene-based p-nitrophenyl amides. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2011.11.127] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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19
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Kundrát O, Eigner V, Cuřínová P, Kroupa J, Lhoták P. Anion binding by meta ureido-substituted thiacalix[4]arenes. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.08.062] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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20
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Stoikov II, Yantemirova AA, Nosov RV, Rizvanov IK, Julmetov AR, Klochkov VV, Antipin IS, Konovalov AI, Zharov I. p-tert-Butyl thiacalix[4]arenes functionalized at the lower rim by amide, hydroxyl and ester groups as anion receptors. Org Biomol Chem 2011; 9:3225-34. [PMID: 21423989 DOI: 10.1039/c0ob01251c] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
New p-tert-butyl thiacalix[4]arenes differently substituted at the lower rim with amide, hydroxyl and ester groups were synthesized. Binding properties of the compounds toward some tetrabutylammonium salts n-Bu(4)NX (X = F(-), Cl(-), Br(-), I(-), CH(3)CO(2)(-), H(2)PO(4)(-), NO(3)(-)) were studied by UV spectroscopy. It was found that the stoichiometry of the complexes, generally, is 1 : 1, and the association constants are in the range of 10(3)-10(5) M(-1). The p-tert-butyl thiacalix[4]arenes containing secondary amide groups trisubstituted at the lower rim bind the studied anions most effectively. Selective receptors for fluoride and dihydrogen phosphate salts of tetrabutylammonium were found.
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Affiliation(s)
- Ivan I Stoikov
- A.M. Butlerov Chemical Institute, Kazan (Volga Region) Federal University, 420008 Kremlevskaya, 18, Kazan, Russian Federation.
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Wang L, Wei W, Guo Y, Xu J, Shao S. Nitro-substituted 3,3'-bis(indolyl)methane derivatives as anion receptors: electron-withdrawing effect and tunability of anion binding properties. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2011; 78:726-731. [PMID: 21186137 DOI: 10.1016/j.saa.2010.12.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2010] [Revised: 11/23/2010] [Accepted: 12/02/2010] [Indexed: 05/30/2023]
Abstract
A series of nitro-substituted 3,3'-bis-indolyl phenylmethane derivatives were synthesized and their anion binding properties were investigated in detail. The introduction of the electron-withdrawing nitro group into indole unit and/or meso-phenyl ring, which leads to the increased acidity of indole NH and meso-position CH proton, has a positive effect on anion binding. The nitro-substituted bis(indolyl)methane receptors exhibited selective colorimetric sensing of F- anion, as revealed by the notable color and spectral changes, rationally due to the deprotonation of the indole NH of the receptor. Meanwhile, the additive introduction of the nitro substituents on the meso-phenyl ring of bis(indolyl)methane can lead to the deprotonation of the meso-position CH and further induce an irreversible oxidation process obtaining bis(indolyl)methene product in the F- anion sensing system.
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Affiliation(s)
- Litao Wang
- Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, PR China
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Structures of urea/thiourea 1,3-disubstituted thia[4]calixarenes and corresponding monofunctional receptors and their anion recognition properties. J INCL PHENOM MACRO 2010. [DOI: 10.1007/s10847-010-9798-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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