1
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Ceborska M, Dąbrowa K, Jurczak J. Solid-state stabilization of water clusters by polyamide macrocyclic frameworks. Acta Cryst Sect A 2022. [DOI: 10.1107/s2053273322090544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
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2
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Woźny M, Trzybiński D, Dąbrowa K, Narodowiec J, Woźniak K. Monosulfonated dibenzo-24-crown-8 and its properties. Org Biomol Chem 2022; 20:5308-5318. [PMID: 35730366 DOI: 10.1039/d2ob00851c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this paper, we describe a method for preparing a monosulfonated dibenzo-24-crown-8 ether, SDB24C8, by direct sulfonation of the parent crown (DB24C8). Since neutral DB24C8 readily interacts with cationic guests, permanently charged SDB24C8 is an advantageous candidate for future supramolecular applications. SDB24C8 can be isolated as a sulfonic acid to be used as it is or converted to a salt of choice. The crystallographic analysis provides the first known host-guest assembly with a DB24C8-based scaffold complexing hydronium and potassium cations. Supramolecular investigations of the interactions of this anionic macrocycle with alkali cations were also performed. According to the expectations, the introduction of the sulfonic group into the DB24C8 scaffold increases the affinities of the receptor. An unusual selectivity of SDB24C8 towards a sodium cation was also observed and further investigated with DFT calculations.
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Affiliation(s)
- M Woźny
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland.
| | - D Trzybiński
- Biological and Chemical Research Centre, Chemistry Department, University of Warsaw, Żwirki i Wigury 101, 02-089 Warszawa, Poland
| | - K Dąbrowa
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland.
| | - J Narodowiec
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland.
| | - K Woźniak
- Biological and Chemical Research Centre, Chemistry Department, University of Warsaw, Żwirki i Wigury 101, 02-089 Warszawa, Poland
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3
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Ceborska M, Dąbrowa K, Cędrowski J, Zimnicka M. Hydrogen-bonded supramolecular assemblies of folic acid with simple hexoses. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.131904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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4
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Niedbała P, Ceborska M, Mehmet M, Ignacak W, Jurczak J, Dąbrowa K. Anion Recognition by a Pincer-Type Host Constructed from Two Polyamide Macrocyclic Frameworks Jointed by a Photo-Addressable Azobenzene Switch. Materials (Basel) 2022; 15:692. [PMID: 35057408 PMCID: PMC8777895 DOI: 10.3390/ma15020692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/19/2021] [Revised: 01/04/2022] [Accepted: 01/10/2022] [Indexed: 12/10/2022]
Abstract
A sterically crowded light-responsive host 1 was synthetized with a 93% yield by applying a post-functionalization protocol utilizing the double amidation of 4,4'-azodibenzoyl dichloride with a readily available 26-membered macrocyclic amine. X-ray structures of two hydrates of trans-1 demonstrate a very different alignment of the azobenzene linkage, which is involved in T-shape or parallel-displaced π⋯π stacking interactions with the pyridine-2,6-dicarboxamide moieties from the macrocyclic backbone. Despite the rigidity of the macrocyclic framework, which generates a large steric hindrance around the azobenzene chromophore, the host 1 retains the ability to undergo a reversible cis⟷trans isomerization upon irradiation with UVA (368 nm) and blue (410 nm) light. Moreover, thermal cis→trans back-isomerization (ΔG0 = 106.5 kJ∙mol-1, t½ = 141 h) is markedly slowed down as compared to the non-macrocyclic analog. 1H NMR titration experiments in DMSO-d6/0.5% water solution reveal that trans-1 exhibits a strong preference for dihydrogenphosphate (H2PO4-) over other anions (Cl-, MeCO2-, and PhCO2-), whereas the photogenerated metastable cis-1 shows lower affinity for the H2PO4- anion.
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Affiliation(s)
- Patryk Niedbała
- Institute of Organic Chemistry, Polish Academy of Sciences, 01-224 Warsaw, Poland; (P.N.); (M.M.); (W.I.)
| | - Magdalena Ceborska
- Institute of Physical Chemistry, Polish Academy of Sciences, 01-224 Warsaw, Poland;
| | - Mart Mehmet
- Institute of Organic Chemistry, Polish Academy of Sciences, 01-224 Warsaw, Poland; (P.N.); (M.M.); (W.I.)
| | - Wiktor Ignacak
- Institute of Organic Chemistry, Polish Academy of Sciences, 01-224 Warsaw, Poland; (P.N.); (M.M.); (W.I.)
| | - Janusz Jurczak
- Institute of Organic Chemistry, Polish Academy of Sciences, 01-224 Warsaw, Poland; (P.N.); (M.M.); (W.I.)
| | - Kajetan Dąbrowa
- Institute of Organic Chemistry, Polish Academy of Sciences, 01-224 Warsaw, Poland; (P.N.); (M.M.); (W.I.)
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5
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Abstract
Chiral photoresponsive host 1 was prepared by a high-yield Cs2CO3-templated macrocyclization. Trans-1 transforms into long-lived cis-1 (25 days) upon irradiation with green light, and the backward transformation is triggered by blue light. Both isomers prefer potassium among alkali metal cations, and cis-1 binds cations stronger than trans-1 (Kcis/Ktrans ≤ 4.1). 1H NMR titration experiments as well as density functional theory studies reveal that sucrose ring oxygen residues and azobenzene nitrogen atoms in 1 contribute to cation coordination.
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Affiliation(s)
- Patrycja Sokołowska
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Kajetan Dąbrowa
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Sławomir Jarosz
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
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6
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Cedrowski J, Dąbrowa K, Przybylski P, Krogul-Sobczak A, Litwinienko G. Antioxidant activity of two edible isothiocyanates: Sulforaphane and erucin is due to their thermal decomposition to sulfenic acids and methylsulfinyl radicals. Food Chem 2021; 353:129213. [PMID: 33774519 DOI: 10.1016/j.foodchem.2021.129213] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 01/05/2021] [Accepted: 01/24/2021] [Indexed: 11/30/2022]
Abstract
Sulforaphane(SFN) and erucin(ERN) are isothiocyanates (ITCs) bearing, respectively, methylsulfinyl and methylsulfanyl groups. Their chemopreventive and anticancer activity is attributed to ability to modulate cellular redox status due to induction of Phase 2 cytoprotective enzymes (indirect antioxidant action) but many attempts to connect the bioactivity of ITCs with their radical trapping activity failed. Both ITCs are evolved from their glucosinolates during food processing of Cruciferous vegetables, therefore, we studied antioxidant behaviour of SFN/ERN at elevated temperature in two lipid systems. Neither ERN nor SFN inhibit the oxidation of bulk linolenic acid (below 100 °C) but both ITCs increase oxidative stability of soy lecithin (above 150 °C). On the basis of GC-MS analysis we verified our preliminary hypothesis (Antioxidants2020, 9, 1090) about participation of sulfenic acids and methylsulfinyl radicals as radical trapping agents responsible for the antioxidant effect of edible ITCs during thermal oxidation of lipids at elevated temperatures (above 140 °C).
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Affiliation(s)
- Jakub Cedrowski
- University of Warsaw, Faculty of Chemistry, Pasteura 1, 02-093 Warsaw, Poland
| | - Kajetan Dąbrowa
- Polish Academy of Sciences, Institute of Organic Chemistry, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Paweł Przybylski
- University of Warsaw, Faculty of Chemistry, Pasteura 1, 02-093 Warsaw, Poland
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7
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Dąbrowa K, Lindner M, Tyszka-Gumkowska A, Jurczak J. Imino-thiolate-templated synthesis of a chloride-selective neutral macrocyclic host with a specific “turn-off–on” fluorescence response for hypochlorite (ClO −). Org Chem Front 2021. [DOI: 10.1039/d1qo00504a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A precise replacement of one oxygen atom with sulfur allowed a novel thioimidate anion-templated macrocyclization to form a crowded host 2 with the ability to act as a highly selective and sensitive fluorescence probe for hypochlorite (ClO−).
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Affiliation(s)
- Kajetan Dąbrowa
- Institute of Organic Chemistry Polish Academy of Sciences, 01-224 Warsaw, Poland
| | - Marcin Lindner
- Institute of Organic Chemistry Polish Academy of Sciences, 01-224 Warsaw, Poland
| | | | - Janusz Jurczak
- Institute of Organic Chemistry Polish Academy of Sciences, 01-224 Warsaw, Poland
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8
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Dąbrowa K, Niedbała P, Pawlak M, Lindner M, Ignacak W, Jurczak J. Tuning Anion-Binding Properties of 22-Membered Unclosed Cryptands by Structural Modification of the Lariat Arm. ACS Omega 2020; 5:29601-29608. [PMID: 33225192 PMCID: PMC7676298 DOI: 10.1021/acsomega.0c04660] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 10/21/2020] [Indexed: 05/03/2023]
Abstract
A series of 22-membered unclosed cryptands end-capped with intra-annular methyl (1), phenyl (2), p-tert-butylphenyl (3), and p-nitrophenyl (4) amide substituents (lariat arm) were synthesized to elucidate the effect of steric and electronic factors on their anion recognition behavior. The 1H NMR titrations in DMSO-d 6 with 0.5% water reveal enhanced selectivity for H2PO4 - vs Cl- and PhCO2 -. The para-attachment of the electron-withdrawing nitro group (-NO2 vs -H and -t-Bu) was found to increase anion-binding affinity, whereas the steric bulkiness of lariat arm (methyl vs aryl) has a marginal effect. DFT calculations reveal that binding of H2PO4 - is associated with minimal conformational change in the lariat arm moiety and involve four hydrogen bond acceptor and one donor sites of host.
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9
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Dąbrowa K, Lindner M, Wasiłek S, Jurczak J. Selective Recognition of Chloride by a 24-Membered Macrocyclic Host with a Hydrophobic Methylenepyrene Substituent. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000662] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Kajetan Dąbrowa
- Institute of Organic Chemistry PAS; Kasprzaka 44/52 01-224 Warsaw Poland
| | - Marcin Lindner
- Institute of Organic Chemistry PAS; Kasprzaka 44/52 01-224 Warsaw Poland
| | - Sylwia Wasiłek
- Institute of Organic Chemistry PAS; Kasprzaka 44/52 01-224 Warsaw Poland
| | - Janusz Jurczak
- Institute of Organic Chemistry PAS; Kasprzaka 44/52 01-224 Warsaw Poland
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10
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Niedbała P, Majdecki M, Dąbrowa K, Jurczak J. Selective Carboxylate Recognition Using Urea-Functionalized Unclosed Cryptands: Mild Synthesis and Complexation Studies. J Org Chem 2020; 85:5058-5064. [PMID: 32142280 PMCID: PMC7497646 DOI: 10.1021/acs.joc.9b03082] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
![]()
Herein we present
the synthesis and evaluation of anion-binding
properties of 12 new receptors from the unclosed cryptand family.
Their core is built on the stable 26-membered tetraamidic macrocyclic
scaffold, whereas various alkyl and aryl urea substituents were introduced
after a yield-limiting macrocyclization step (65–98%). The
receptors strongly bind anions, in particular carboxylates, even in
a highly competitive solvent mixture (DMSO-d6 + H2O 95:5 v/v).
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Affiliation(s)
- Patryk Niedbała
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Maciej Majdecki
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Kajetan Dąbrowa
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Janusz Jurczak
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
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11
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Jagleniec D, Ziach K, Dąbrowa K, Romański J. The Effect of Substitution Pattern on Binding Ability in Regioisomeric Ion Pair Receptors Based on an Aminobenzoic Platform. Molecules 2019; 24:molecules24162990. [PMID: 31426565 PMCID: PMC6720599 DOI: 10.3390/molecules24162990] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Revised: 08/12/2019] [Accepted: 08/14/2019] [Indexed: 12/30/2022] Open
Abstract
A series of ditopic ion pair receptors equipped with 4-nitrophenylurea and 1-aza-18-crown-6-ether linked by ortho-(1), meta-(2), and para-(3) substituted benzoic acid were readily synthesized in three steps from commercially available materials. The binding properties of these regioisomeric receptors were determined using UV-vis and 1H NMR spectroscopy in MeCN and in the solid state by single-crystal X-ray diffraction crystallography. The solution studies revealed that, apart from carboxylates, all the anions tested formed stronger complexes in the presence of sodium cations. Receptors 2 and 3 were found to interact with ion pairs with remarkably higher affinity than ortho-substituted 1. 1H NMR titration experiments showed that both urea NH protons interacted with anions with comparable strength in the case of receptors 2 and 3, but only one of the NHs was effective in anion binding in the case of receptor 1. X-ray analysis of the crystal structure of receptor 1 and 1·NaPF6 complex showed that binding was hampered due to the formation of an intramolecular hydrogen bond. Analysis of the crystal structures of 2·NaBr and 3·NaBr complexes revealed that proper mutual orientation of binding domains was responsible for the improved binding of the sodium salts.
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Affiliation(s)
- Damian Jagleniec
- Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
| | - Krzysztof Ziach
- Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
| | - Kajetan Dąbrowa
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Jan Romański
- Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland.
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12
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Tyszka A, Pikus G, Dąbrowa K, Jurczak J. Late-Stage Functionalization of (R)-BINOL-Based Diazacoronands and Their Chiral Recognition of α-Phenylethylamine Hydrochlorides. J Org Chem 2019; 84:6502-6507. [DOI: 10.1021/acs.joc.9b00630] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Agata Tyszka
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, Warsaw 01-224, Poland
| | - Grzegorz Pikus
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, Warsaw 01-224, Poland
| | - Kajetan Dąbrowa
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, Warsaw 01-224, Poland
| | - Janusz Jurczak
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, Warsaw 01-224, Poland
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13
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Chaciak B, Dąbrowa K, Świder P, Jarosz S. Macrocyclic derivatives with a sucrose scaffold: insertion of a long polyhydroxylated linker between the terminal 6,6′-positions. NEW J CHEM 2018. [DOI: 10.1039/c8nj02808g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
A series of five new macrocyclic hybrids with a sucrose scaffold were prepared by the reaction of activated 1′,2,3,3′,4,4′-hexa-O-methylsucrose with diversely functionalized d-mannitols.
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Affiliation(s)
- Bartosz Chaciak
- Institute of Organic Chemistry
- Polish Academy of Sciences
- ul. Kasprzaka 44/52 01-224 Warsaw
- Poland
| | - Kajetan Dąbrowa
- Institute of Organic Chemistry
- Polish Academy of Sciences
- ul. Kasprzaka 44/52 01-224 Warsaw
- Poland
| | - Paweł Świder
- Institute of Organic Chemistry
- Polish Academy of Sciences
- ul. Kasprzaka 44/52 01-224 Warsaw
- Poland
| | - Sławomir Jarosz
- Institute of Organic Chemistry
- Polish Academy of Sciences
- ul. Kasprzaka 44/52 01-224 Warsaw
- Poland
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14
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Jurczak J, Sobczuk A, Dąbrowa K, Lindner M, Niedbała P, Stepniak P. Chirality of 20-membered unclosed cryptand: Macroring distortion via lariat arm modification. Chirality 2017; 30:219-225. [DOI: 10.1002/chir.22797] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Revised: 11/13/2017] [Accepted: 11/15/2017] [Indexed: 11/08/2022]
Affiliation(s)
- Janusz Jurczak
- Institute of Organic Chemistry; Polish Academy of Sciences; Warsaw Poland
| | - Adam Sobczuk
- Institute of Organic Chemistry; Polish Academy of Sciences; Warsaw Poland
| | - Kajetan Dąbrowa
- Institute of Organic Chemistry; Polish Academy of Sciences; Warsaw Poland
| | - Marcin Lindner
- Institute of Organic Chemistry; Polish Academy of Sciences; Warsaw Poland
| | - Patryk Niedbała
- Institute of Organic Chemistry; Polish Academy of Sciences; Warsaw Poland
| | - Pawel Stepniak
- Institute of Organic Chemistry; Polish Academy of Sciences; Warsaw Poland
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15
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Affiliation(s)
- Kajetan Dąbrowa
- Institute of Organic Chemistry, Polish Academy of Sciences, Warsaw, Poland
| | - Magdalena Ceborska
- Institute of Physical Chemistry, Polish Academy of Sciences, Warsaw, Poland
| | - Janusz Jurczak
- Institute of Organic Chemistry, Polish Academy of Sciences, Warsaw, Poland
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16
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Ceborska M, Zimnicka M, Kowalska AA, Dąbrowa K, Repeć B. Structural diversity in the host-guest complexes of the antifolate pemetrexed with native cyclodextrins: gas phase, solution and solid state studies. Beilstein J Org Chem 2017; 13:2252-2263. [PMID: 29114329 PMCID: PMC5669224 DOI: 10.3762/bjoc.13.222] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Accepted: 09/22/2017] [Indexed: 12/20/2022] Open
Abstract
The complexation of the antifolate pemetrexed (PTX) with native cyclodextrins was studied. This process, along with the findings gathered for the structurally related folic acid was treated as a model for exploiting host–guest interactions of this class of guest molecules in the gas phase, in solution and in the solid state. Mass spectrometry was employed for the investigation of the architecture and relative gas-phase stabilities of these supramolecular complexes. The mode of complexation was further tracked by 1D and 2D NMR proving the formation of the exclusion-type complex with α-CD and pseudorotaxane inclusion-type complexes with β-, and γ-CDs. UV–vis titrations at pH 7.4 gave association constants for the obtained complexes. The stability of the complexes increases in the series: α-CD/PTX < γ-CD/PTX << β-CD/PTX. The association of PTX with a monomer cyclodextrin equivalent – methyl α-D-glucopyranoside – was investigated for a deeper understanding of the type of host–guest interactions. Solid state studies of PTX/CDs were performed using FTIR–ATR and Raman spectroscopy techniques.
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Affiliation(s)
- Magdalena Ceborska
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Magdalena Zimnicka
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Aneta Aniela Kowalska
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Kajetan Dąbrowa
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Barbara Repeć
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
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17
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Łęczycka-Wilk K, Dąbrowa K, Cmoch P, Jarosz S. Chloride-Templated Macrocyclization and Anion-Binding Properties of C2-Symmetric Macrocyclic Ureas from Sucrose. Org Lett 2017; 19:4596-4599. [DOI: 10.1021/acs.orglett.7b02198] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Katarzyna Łęczycka-Wilk
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Kajetan Dąbrowa
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Piotr Cmoch
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Sławomir Jarosz
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
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18
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Dąbrowa K, Jurczak J. Tetra-(meta-butylcarbamoyl)azobenzene: A Rationally Designed Photoswitch with Binding Affinity for Oxoanions in a Long-Lived Z-State. Org Lett 2017; 19:1378-1381. [PMID: 28240890 DOI: 10.1021/acs.orglett.7b00267] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A new photoswitchable anion receptor 1 based on a tetra-meta-substituted azobenzene skeleton has been readily synthesized in two steps. Titration studies (1H NMR) and theoretical predictions (DFT/M06-2X/6-31G(d)/DMSO-SM8) revealed that nonplanar Z-1 is a better host for anions than E-1, which results from the greater ability of four amide NH protons in the Z-state to cooperatively bind oxoanions, in particular tetrahedral H2PO4- and H2AsO4-. Furthermore, the thermal decay of Z-1 (τ1/2 = 11 days) is not accelerated by anion binding.
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Affiliation(s)
- Kajetan Dąbrowa
- Institute of Organic Chemistry, Polish Academy of Sciences , Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Janusz Jurczak
- Institute of Organic Chemistry, Polish Academy of Sciences , Kasprzaka 44/52, 01-224 Warsaw, Poland
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19
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Ziach K, Dąbrowa K, Niedbała P, Kalisiak J, Jurczak J. Exploration of structural motifs influencing solid-state conformation and packing of unclosed cryptands sharing the same 19-membered macrocyclic core. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.10.053] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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20
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Dąbrowa K, Niedbała P, Jurczak J. Engineering Light-Mediated Bistable Azobenzene Switches Bearing Urea d-Aminoglucose Units for Chiral Discrimination of Carboxylates. J Org Chem 2016; 81:3576-84. [DOI: 10.1021/acs.joc.6b00200] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Kajetan Dąbrowa
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Patryk Niedbała
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Janusz Jurczak
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
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21
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22
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Ulatowski F, Dąbrowa K, Bałakier T, Jurczak J. Recognizing the Limited Applicability of Job Plots in Studying Host-Guest Interactions in Supramolecular Chemistry. J Org Chem 2016; 81:1746-56. [PMID: 26866984 DOI: 10.1021/acs.joc.5b02909] [Citation(s) in RCA: 247] [Impact Index Per Article: 30.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Continuous variation method, known as Job plot, is the most commonly applied method for the determination of stoichiometry of complex chemical entities for over 100 years. Although, the method was proven successful in the analysis of very stable metal-ligand complexes, we demonstrate that its use in supramolecular chemistry often provides false results. We support this statement with multiple simulations as well as cases studies of several real host-guest systems. We propose an alternative, general method relying on the analysis of residual distribution in titration data fitting. The latter method is more convenient compared to the Job plot and unlike it gives correct results in all real cases studied.
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Affiliation(s)
- Filip Ulatowski
- Institute of Organic Chemistry, Polish Academy of Sciences , Kasprzaka 44/50 01-224 Warsaw, Poland
| | - Kajetan Dąbrowa
- Institute of Organic Chemistry, Polish Academy of Sciences , Kasprzaka 44/50 01-224 Warsaw, Poland
| | - Tomasz Bałakier
- Institute of Organic Chemistry, Polish Academy of Sciences , Kasprzaka 44/50 01-224 Warsaw, Poland
| | - Janusz Jurczak
- Institute of Organic Chemistry, Polish Academy of Sciences , Kasprzaka 44/50 01-224 Warsaw, Poland
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Abstract
Herein, we report that thermal Z→E isomerisation of simple azobenzene urea derivatives is selectively and predictably controlled by anion binding. The rate of this process depends strictly on the anion concentration and its binding affinity to the Z-isomer of the azobenzene host, i.e. increased rate constants are observed for higher anion concentration as well as for more strongly bound guests. The origin of this phenomenon is attributed to the electron density transfer from the anion to the host π-system, resulting in increased repulsion between the lone electron pairs in the N=N bond.
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Affiliation(s)
- Kajetan Dąbrowa
- Institute of Organic Chemistry, Polish Academy of Science, Kasprzaka 44/52, Warsaw 01-224, Poland.
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Dąbrowa K, Pawlak M, Duszewski P, Jurczak J. "Unclosed cryptands": a point of departure for developing potent neutral anion receptors. Org Lett 2012; 14:6298-301. [PMID: 23228110 DOI: 10.1021/ol303065k] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Six macrocyclic lariat-type compounds, representing a new class of anion receptors, were synthesized in a simple approach. We identified the optimal macroring size and the position of the hydrogen bond donating center in the lariat arm offering the best affinities toward chloride and carboxylate anions. The anion-binding properties of such systems were investigated by applying (1)H NMR titrations in DMSO/water and methanol/DMSO mixtures.
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Affiliation(s)
- Kajetan Dąbrowa
- Institute of Organic Chemistry, Polish Academy of Science, Kasprzaka 44/52, 01-224 Warsaw, Poland
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