1
|
Singh A, Kumar R, Patel R, Trishna, Gautam RN, Bharty MK, Prasad LB. Dithiocarbamate-based novel anti-histaminic agents: synthesis, characterization, crystal structure and thermal study. Dalton Trans 2024; 53:14077-14088. [PMID: 39113544 DOI: 10.1039/d4dt01777c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/21/2024]
Abstract
A new N-(4-fluorobenzyl) N-(pyridin-2-ylmethyl) dithiocarbamate ligand (fbpm) having structural similarity to clinically approved antihistaminic drugs (viz. pheniramine, chlorpheniramine, and brompheniramine) and its four metal complexes [Co(fbpm)3] (1), [Ni(fbpm)2] (2), [Cu(fbpm)2] (3), and [Zn(fbpm)2] (4) were successfully synthesized and characterized by various techniques i.e. elemental analysis, FT-IR spectroscopy, HR-MS, NMR spectroscopy, and absorption and emission spectroscopy. Furthermore, complexes 1 and 2 were characterized by single crystal X-ray diffraction. Complex 1 adopts distorted octahedral geometry around the Co(III) center while complex 2 adopts distorted square planar geometry around the Zn(II) center. X-ray data also showed various weak intermolecular C-H⋯F and C-H⋯N hydrogen bonding interactions leading to supramolecular architectures in complexes 1 and 2. The thermal decomposition study of complexes 1-4 analyzed by TGA shows that they are thermally stable up to 150 °C and also gives strong evidence for the formation of respective metal sulfides at higher temperatures. The antihistaminic activity of the ligand (fbpm) and its complexes 1-4 was examined against clonidine and haloperidol-induced catalepsy in Swiss albino mice of either gender in an in vivo animal model. The result shows that these synthesized compounds have antihistaminic potential to inhibit clonidine-induced catalepsy and may be targeted for different allergic conditions. Complex 3 showed maximum reduction in clonidine-induced catalepsy after 180 minutes of treatment when compared with the induced control.
Collapse
Affiliation(s)
- Anupam Singh
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi 221005, India.
| | - Rajesh Kumar
- Department of Pharmacology, Institute of Medical Science, Banaras Hindu University, Varanasi - 221005, India
- Department of Pharmacology, Maharaja Agrasen School of Pharmacy, Maharaja Agrasen University, Solan, Himachal Pradesh - 174103, India
| | - Riya Patel
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi 221005, India.
| | - Trishna
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi 221005, India.
| | - Ram Nayan Gautam
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi 221005, India.
| | - M K Bharty
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi 221005, India.
| | - Lal Bahadur Prasad
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi 221005, India.
| |
Collapse
|
2
|
Sun Y, Morton ER, Bhabha H, Clark ER, Bučar DK, Barros-Metlova V, Gould JA, Aliev AE, Haynes CJE. Competitive Intramolecular Hydrogen Bonding: Offering Molecules a Choice. Chempluschem 2024; 89:e202400055. [PMID: 38713896 DOI: 10.1002/cplu.202400055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Revised: 04/30/2024] [Accepted: 05/02/2024] [Indexed: 05/09/2024]
Abstract
The conformational preferences of N-((6-methylpyridin-2-yl)carbamothioyl)benzamide were studied in solution, the gas phase and the solid state via a combination of NMR, density functional theory (DFT) and single crystal X-ray techniques. This acyl thiourea derivative can adopt two classes of low energy conformation, each stabilized by a different 6-membered intramolecular hydrogen bond (IHB) pseudoring. Analysis in different solvents revealed that the conformational preference of this molecule is polarity dependent, with increasingly polar environments yielding a higher proportion of the minor conformer containing an NH⋅⋅⋅N IHB. The calculated barrier to interconversion is consistent with dynamic behaviour at room temperature, despite the propensity of 6-membered IHB pseudorings to be static. This work demonstrates that introducing competitive IHB pathways can render static IHBs more dynamic and that such systems could have potential as chameleons in drug design.
Collapse
Affiliation(s)
- Yu Sun
- Chemistry Department, University College London, 20 Gordon Street, London, WC1H 0AJ, UK
| | - Evelyn R Morton
- Chemistry Department, University College London, 20 Gordon Street, London, WC1H 0AJ, UK
| | - Hunaida Bhabha
- Chemistry Department, University College London, 20 Gordon Street, London, WC1H 0AJ, UK
| | - Ewan R Clark
- School of Chemistry and Forensics, University of Kent, Canterbury, CT2 7NH, UK
| | - Dejan-Krešimir Bučar
- Chemistry Department, University College London, 20 Gordon Street, London, WC1H 0AJ, UK
| | | | - Jamie A Gould
- Chemistry Department, University College London, 20 Gordon Street, London, WC1H 0AJ, UK
| | - Abil E Aliev
- Chemistry Department, University College London, 20 Gordon Street, London, WC1H 0AJ, UK
| | - Cally J E Haynes
- Chemistry Department, University College London, 20 Gordon Street, London, WC1H 0AJ, UK
| |
Collapse
|
3
|
Preston J, Parisi E, Murray B, Tyler AI, Simone E. Elucidating the Polymorphism of Xanthone: A Crystallization and Characterization Study. CRYSTAL GROWTH & DESIGN 2024; 24:3256-3268. [PMID: 38659660 PMCID: PMC11036362 DOI: 10.1021/acs.cgd.3c01506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 02/09/2024] [Accepted: 02/09/2024] [Indexed: 04/26/2024]
Abstract
The aim of this work is to shed light on the polymorphism of xanthones, a class of oxygenated molecules well known for their bioactivity, including antioxidant, anticancer, and anti-inflammatory effects. Understanding the polymorphism of xanthones can enable the design of novel solid products for pharmaceutical, nutraceutical, and agrochemical applications. Prior to this work, two entries accounting for different space groups were deposited for 9-xanthone in the Cambridge Structure Database (CSD): an orthorhombic P212121 and a monoclinic P21 structure solved at room and low temperatures, respectively. However, the very high similarity between these two structures and the lack of clear differences in their physical properties (e.g., thermal behavior) suggested the possibility of the existence of only one crystal structure. In fact, the differences shown in the literature data might be related to the chosen operating parameters, as well as the instrumental resolution of the single-crystal X-ray diffraction experiments. In the work presented here, the ambiguity in the polymorphism of xanthone is investigated using thermal analysis, powder and synchrotron single-crystal XRD, and optical microscopy. Additionally, a workflow for the correct identification of twinned crystal structures, which can be applied to other polymorphic systems, is presented. Such workflow combines the collection of a large data set of high-resolution diffraction patterns using synchrotron radiation with the use of principal component analysis, a dimensionality reduction technique, for a quick and effective identification of phase transitions happening during the data collection. Crystallization experiments were designed to promote the formation of different crystal structures of xanthone that were recrystallized based on past literature and beyond.
Collapse
Affiliation(s)
- Janine
Andrea Preston
- School
of Chemical and Process Engineering, University
of Leeds, Leeds LS2 9JT, United
Kingdom
| | - Emmanuele Parisi
- Department
of Applied Science and Technology (DISAT), Politecnico di Torino, 10129 Torino, Italy
| | - Brent Murray
- Food
Colloids and Bioprocessing Group, School of Food Science and Nutrition, University of Leeds, Leeds LS2 9JT, United Kingdom
| | - Arwen
I. I. Tyler
- Food
Colloids and Bioprocessing Group, School of Food Science and Nutrition, University of Leeds, Leeds LS2 9JT, United Kingdom
| | - Elena Simone
- Department
of Applied Science and Technology (DISAT), Politecnico di Torino, 10129 Torino, Italy
- Food
Colloids and Bioprocessing Group, School of Food Science and Nutrition, University of Leeds, Leeds LS2 9JT, United Kingdom
| |
Collapse
|
4
|
Xu M, Yin P, Pang S. Assembly of 1D Helical Energetic Coordination Polymers Using a Flexible Bridged Furazan-triazole Cation. J Org Chem 2024. [PMID: 38196087 DOI: 10.1021/acs.joc.3c02053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2024]
Abstract
Two new energetic coordination compounds with 1D helical chain structures have been synthesized. First, the polyamine precursor 4,5-diamino-2-((4-amino-1,2,5-oxadiazole-3-yl)methyl)-2,4-dihydro-3H-1,2,4-triazole-3-imino chloride salt (TATAF-Cl) is obtained by incorporating 4-(chloromethyl)-1,2,5-oxadiazol-3-amine with 4H-1,2,4-triazole-3,4,5-triamine. Using a simple hydrothermal method, two energetic complexes, Ag(TATAF)(ClO4)2 (ECP-1) and Ag(TATAF)(NO3)2·H2O (ECP-2), with a helical 1D MOF structure of furazan and triazole were synthesized. Compounds ECP-1 and ECP-2 have relatively high nitrogen and oxygen content (N + O%: 52.04%, 61.04%), excellent crystal density (2.229 g cm-3, 2.116 g cm-3 at 298 K) and high heat of detonation (1.18 kcal g-1, 1.06 kcal g-1), good detonation performance (P: 35.34 GPa, 29.52 GPa; Dv: 8412 m s-1, 7794 m s-1), and moderate sensitivity (IS: 8 J, 13 J; FS: 72 N, 64 N). Structurally, the Ag+ of the two ECPs is coordinated with two energetic cations, two perchlorates, or one nitrate via tetragonal coordination to form a single helical structure that is interspersed up and down in two directions.
Collapse
Affiliation(s)
- Man Xu
- School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China
- Beijing Institute of Technology Chongqing Innovation Center, Chongqing 401120, China
| | - Ping Yin
- School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China
- Beijing Institute of Technology Chongqing Innovation Center, Chongqing 401120, China
| | - Siping Pang
- School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China
| |
Collapse
|
5
|
Bhatia P, Pandey K, Avasthi B, Das P, Ghule VD, Kumar D. Controlling the Energetic Properties of N-Methylene-C-Linked 4-Hydroxy-3,5-dinitropyrazole- and Tetrazole-Based Compounds via a Selective Mono- and Dicationic Salt Formation Strategy. J Org Chem 2023; 88:15085-15096. [PMID: 37847075 DOI: 10.1021/acs.joc.3c01530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2023]
Abstract
In the quest to synthesize high-performing insensitive high-energy density materials (HEDMs), the main challenge is establishing an equilibrium between energy and stability. For this purpose, we explored 4-hydroxy-3,5-dinitropyrazole- and tetrazole-based energetic scaffolds connected via a N-methylene-C bridge. The hydroxy functionality between nitro groups on the pyrazole ring promotes physical stability via inter- and intramolecular hydrogen bonding and contributes to oxygen balance, supporting better energetic performance. Due to two acidic sites (OH and NH) with different reactivities, a series of monocationic and dicationic salts were synthesized, and their overall performance was compared. All compounds synthesized in this study have high physical stability with impact sensitivity >40 J and friction sensitivity >360 N. Monocationic salts were generally found to have better thermal stability with respect to their corresponding dicationic energetic salts, which showed better energetic performance. The salt formation strategy effectively improved the thermal stability of 2 (Td = 168 °C), where most energetic salts have decomposition temperatures higher than 220 °C. All of the compounds were characterized through IR, multinuclear NMR spectroscopy, high-resolution mass spectrometry (HRMS), and elemental analysis. The structure-property relationship was studied using Hirshfeld surface analysis, noncovalent interaction (NCI) analysis, and electrostatic potential studies.
Collapse
Affiliation(s)
- Prachi Bhatia
- Energetic Materials Laboratory, Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee247667, Uttarakhand India
| | - Krishna Pandey
- Energetic Materials Laboratory, Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee247667, Uttarakhand India
| | - Badal Avasthi
- Energetic Materials Laboratory, Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee247667, Uttarakhand India
| | - Priyanka Das
- Energetic Materials Laboratory, Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee247667, Uttarakhand India
| | - Vikas D Ghule
- Department of Chemistry, National Institute of Technology Kurukshetra, Kurukshetra 136119, Haryana India
| | - Dheeraj Kumar
- Energetic Materials Laboratory, Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee247667, Uttarakhand India
| |
Collapse
|
6
|
Vicidomini C, Roviello GN. Protein-Targeting Drug Discovery. Biomolecules 2023; 13:1591. [PMID: 38002273 PMCID: PMC10669076 DOI: 10.3390/biom13111591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Accepted: 10/27/2023] [Indexed: 11/26/2023] Open
Abstract
Protein-driven biological processes play a fundamental role in biomedicine because they are related to pathologies of enormous social impact, such as cancer, neuropathies, and viral diseases, including the one at the origin of the recent COVID-19 pandemic [...].
Collapse
Affiliation(s)
| | - Giovanni N. Roviello
- Institute of Biostructures and Bioimaging, Italian National Council for Research (IBB-CNR), Area di Ricerca Site and Headquarters, Via Pietro Castellino 111, 80131 Naples, Italy
| |
Collapse
|
7
|
Parisi E, Landi A, Fusco S, Manfredi C, Peluso A, Wahler S, Klapötke TM, Centore R. High-Energy-Density Materials: An Amphoteric N-Rich Bis(triazole) and Salts of Its Cationic and Anionic Species. Inorg Chem 2021; 60:16213-16222. [PMID: 34636552 PMCID: PMC8564754 DOI: 10.1021/acs.inorgchem.1c02002] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
![]()
The synthesis and
characterization of the N-rich bis(triazole)
compound 1H,4′H-[3,3′-bis(1,2,4-triazole)]-4′,5,5′-triamine
(C4H7N9) with a N content of 69.6%
by weight is reported. The compound exhibits a rich acid–base
behavior because it can accept up to two protons, forming a monocation
and a dication, and can lose one proton, forming an anion. Measurement
of the acid constants has shown that there exist well-defined pH intervals
in which each of the four species is predominant in solution, opening
the way to their isolation and characterization by single-crystal
X-ray analysis as salts with different counterions. Some energetic
salts of the monocation or dication containing oxidizing inorganic
counterions (dinitramide, perchlorate, and nitrate) were also prepared
and characterized in the solid state for their sensitivity. In particular,
the neutral compound shows a very remarkable thermal stability in
air, with Td = 347 °C, and is insensitive
to impact and friction. Salts of the dication with energetic counterions,
in particular perchlorate and nitrate, show increased sensitivities
and reduced thermal stability. The salt of the monocation with dinitramide
as the counterion outperforms other dinitramide salts reported in
the literature because of its higher thermal stability (Td = 230 °C in air) and friction insensitiveness. An energetic, N-rich compound that, depending
on the pH,
can exist as neutral, singly protonated, doubly protonated, and deprotonated
species is shown.
Collapse
Affiliation(s)
- Emmanuele Parisi
- Department of Chemical Sciences, University of Naples Federico II, Via Cinthia, I-80126 Naples, Italy
| | - Alessandro Landi
- Department of Chemistry and Biology, University of Salerno, Via Giovanni Paolo II, 132, I-84084 Fisciano, Salerno, Italy
| | - Sandra Fusco
- Department of Chemical Sciences, University of Naples Federico II, Via Cinthia, I-80126 Naples, Italy
| | - Carla Manfredi
- Department of Chemical Sciences, University of Naples Federico II, Via Cinthia, I-80126 Naples, Italy
| | - Andrea Peluso
- Department of Chemistry and Biology, University of Salerno, Via Giovanni Paolo II, 132, I-84084 Fisciano, Salerno, Italy
| | - Sabrina Wahler
- Department of Chemistry, Energetic Materials Research, Ludwig-Maximilian University, Butenandtstrasse 5-13, D-81377 Münich, Germany
| | - Thomas M Klapötke
- Department of Chemistry, Energetic Materials Research, Ludwig-Maximilian University, Butenandtstrasse 5-13, D-81377 Münich, Germany
| | - Roberto Centore
- Department of Chemical Sciences, University of Naples Federico II, Via Cinthia, I-80126 Naples, Italy
| |
Collapse
|
8
|
Parisi E, Centore R. Stabilization of an elusive tautomer by metal coordination. Acta Crystallogr C Struct Chem 2021; 77:395-401. [PMID: 34216445 PMCID: PMC8254526 DOI: 10.1107/s2053229621006203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Accepted: 06/16/2021] [Indexed: 11/11/2022] Open
Abstract
The solid-state isolation of the different tautomers of a chemical compound can be a challenging problem. In many cases, tautomers with an energy very close to the most stable one cannot be isolated (elusive tautomers). In this article, with reference to the 4-methyl-7-(pyrazin-2-yl)-2H-[1,2,4]triazolo[3,2-c][1,2,4]triazole ligand, for which the elusive 3H-tautomer has an energy only 1.4 kcal mol-1 greater than the most stable 2H form, we show that metal complexation is a successful and reliable way for stabilizing the elusive tautomer. We have prepared two complexes of the neutral ligand with CuBr2 and ZnBr2, namely, aquabromidobis[4-methyl-7-(pyrazin-2-yl)-3H-[1,2,4]triazolo[3,2-c][1,2,4]triazole]copper(II) bromide trihydrate, [CuBr(C8H7N7)2(H2O)]Br·3H2O, and dibromido[4-methyl-7-(pyrazin-2-yl)-2H-[1,2,4]triazolo[3,2-c][1,2,4]triazole][4-methyl-7-(pyrazin-2-yl)-3H-[1,2,4]triazolo[3,2-c][1,2,4]triazole]zinc(II) monohydrate, [ZnBr2(C8H7N7)2]·H2O. The X-ray analysis shows that, in both cases, the elusive 3H-tautomer is present. The results of the crystallographic analysis of the two complexes reflect the different coordination preferences of CuII and ZnII. The copper(II) complex is homotautomeric as it only contains the elusive 3H-tautomer of the ligand. The complex can be described as octahedral with tetragonal distortion. Two 3H-triazolotriazole ligands are bis-chelated in the equatorial plane, while a water molecule and a bromide ion in elongated axial positions complete the coordination environment. The zinc(II) complex, on the other hand, is heterotautomeric and contains two bromide ions and two monodentate ligand molecules, one in the 2H-tautomeric form and the other in the 3H-tautomeric form, both coordinated to the metal in tetrahedral geometry. The observation of mixed-tautomer complexes is unprecedented for neutral ligands. The analysis of the X-ray molecular structures of the two complexes allows the deduction of possible rules for a rational design of mixed-tautomer complexes.
Collapse
Affiliation(s)
- Emmanuele Parisi
- Dipartimento di Scienze Chimiche, Università degli Studi di Napoli 'Federico II', Complesso di Monte S. Angelo, Via Cinthia, 80126 Napoli, Italy
| | - Roberto Centore
- Dipartimento di Scienze Chimiche, Università degli Studi di Napoli 'Federico II', Complesso di Monte S. Angelo, Via Cinthia, 80126 Napoli, Italy
| |
Collapse
|