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Syed Abuthahir S, NizamMohideen M, Viswanathan V, Govindhan M, Subramanian K. The crystal structures of two new coumarin derivatives: 2-(4-{2-[(2-oxo-2 H-chromen-4-yl)-oxy]acet-yl}piperazin-1-yl)acetamide and N-(2,4-di-meth-oxy-benz-yl)-2-[(2-oxo-2 H-chromen-4-yl)-oxy]acetamide. Acta Crystallogr E Crystallogr Commun 2019; 75:482-488. [PMID: 31161061 PMCID: PMC6509693 DOI: 10.1107/s2056989019003736] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Accepted: 03/18/2019] [Indexed: 11/22/2022]
Abstract
The title compounds, 2-(4-{2-[(2-oxo-2H-chromen-4-yl)-oxy]acet-yl}piperazin-1-yl)acetamide, C17H19N3O5, (I), and N-(2,4-di-meth-oxy-benz-yl)-2-[(2-oxo-2H-chromen-4-yl)-oxy]acetamide, C20H19NO6, (II), are new coumarin derivatives. In compound (I), the six-membered piperazine adopts a chair conformation. The dihedral angles between the mean planes of the chromene ring and amide plane is 82.65 (7)° in (I) and 26.2 (4)° in (II). The dihedral angles between the mean planes of the chromene ring and the four planar C atoms of the piperazine ring in (I) and the benzene ring in (II) are 87.66 (6) and 65.0 (4)°, respectively. There are short intra-molecular contacts in both mol-ecules forming S(5) ring motifs, viz. N-H⋯N and C-H⋯O in (I), and N-H⋯O and C-H⋯N in (II). In the crystals of both compounds, mol-ecules are linked by N-H⋯O hydrogen bonds, forming chains along [10] in (I) and [010] in (II). The chains are linked by C-H⋯O hydrogen bonds, forming layers parallel to the ab plane in the crystals of both compounds. In the crystal of (I), there are also C-H⋯π and offset π-π inter-actions [inter-centroid distance = 3.691 (1) Å] present within the layers. In the crystal of (II), there are only weak offset π-π inter-actions [inter-centroid distance = 3.981 (6) Å] present within the layers. The inter-molecular contacts in the crystals of both compounds have been analysed using Hirshfeld surface analysis and two-dimensional fingerprint plots.
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Affiliation(s)
- S. Syed Abuthahir
- PG & Research Department of Physics, The New College (Autonomous), Chennai 600 014, Tamil Nadu, India
| | - M. NizamMohideen
- PG & Research Department of Physics, The New College (Autonomous), Chennai 600 014, Tamil Nadu, India
| | - V. Viswanathan
- Department of Biophysics, All India Institute of Medical Science, New Delhi 110 029, India
| | - M. Govindhan
- Department of Chemistry, Anna University, Chennai 600 025, India
- Orchid Chemicals & Pharmaceuticals Ltd, R&D Centre, Sholinganallur, Chennai 600 119, India
| | - K. Subramanian
- Department of Chemistry, Anna University, Chennai 600 025, India
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Gomes LR, Low JN, van Mourik T, da Silveira Pinto LS, de Souza MV, Wardell JL. Crystal structures, Hirsfeld surface analysis and a computational study of four ethyl 2-oxo-2 H-chromene-3-carboxylate derivatives: a survey of organyl 2-oxo-2 H-chromene-3-carboxylate structures. Z KRIST-CRYST MATER 2019. [DOI: 10.1515/zkri-2018-2117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Crystal structures, Hirshfeld surface analysis and a computational study have been carried out on 2-oxo-2H-chromene-3-carboxylates. Crystal structures are reported for ethyl R-2-oxo-2H-chromene-3-carboxylate derivatives, 2a: R=6-Me, 2b: 7-Me, 2c: 7-Me, 2d: R=7-MeO. In contrast to 2-oxo-2H-chromene-3-carboxamides, 1, in which classical intramolecular N–H···O hydrogen bonds stabilize planar structures and hinder rotation of the amido group out of the coumarin plane in 2, without an equivalent hydrogen bond, there is a greater rotational freedom of the carboxylate group. The interplanar angles between the coumarin core and its attached –C(O)–R substituent in crystalline 2a, 2b, 2c and 2d are 10.41(6), 36.65(6), 10.4(2) and 5.64(6)°, respectively, with distances between the carbonyl oxygen atoms of 2.8255(16), 2.9278(16), 4.226(2) and 2.8328(14) Å, respectively. A theoretical study of molecular conformations was carried out at the M06-2X density level with the 6-31+G(d) and aug-cc-pVTZ basis sets, in methanol solution modeled by PCM, indicated that the most stable conformations had the carbonyl group of the ester in the plane of the coumarin core: the s-cis arrangement of the ester carbonyl and the 2-oxo moieties being the slightly more stable than the s-trans form by less than 0.5 kcal/mol. The experimental conformations of 2a and 2d match well the low energy s-cis arrangement, and 2c matches the slightly lesser stable s-trans arrangement found in the theoretical study. A survey of the molecular conformations of more than 50 2H-chromene-3-carboxylates derivatives in the CCDC data base indicated two distinct groupings of conformations, s-cis and s-trans, each with interplanar angles <30°.
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Affiliation(s)
- Ligia R. Gomes
- FP-ENAS-Faculdade de Ciências de Saúde, Escola Superior de Saúde da UFP, Universidade Fernando Pessoa , Rua Carlos da Maia, 296 , P-4200-150 Porto , Portugal
- REQUIMTE, Departamento de Química e Bioquímica , Faculdade de Ciências da Universidade do Porto , Rua do Campo Alegre, 687 , P-4169-007, Porto , Portugal
| | - John N. Low
- Department of Chemistry , University of Aberdeen , Meston Walk, Old Aberdeen, AB24 3UE , Scotland , UK
| | - Tanja van Mourik
- School of Chemistry, University of St. Andrews , North Haugh, St. Andrews, Fife KY16 9ST , Scotland , UK
| | - Ligia S. da Silveira Pinto
- Universidade Federal do Rio de Janeiro, Instituto de Química , Departamento de Química Orgânica , CP 68563, 21945-970 , Rio de Janeiro , Brazil
- Instituto de Tecnologia em Fármacos e Farmanguinhos, Fundação Oswaldo Cruz , 21041-250 Rio de Janeiro, RJ , Brazil
| | - Marcus V.N. de Souza
- Instituto de Tecnologia em Fármacos e Farmanguinhos, Fundação Oswaldo Cruz , 21041-250 Rio de Janeiro, RJ , Brazil
| | - Jámes L. Wardell
- Department of Chemistry , University of Aberdeen , Meston Walk, Old Aberdeen, AB24 3UE , Scotland , UK
- Instituto de Tecnologia em Fármacos e Farmanguinhos, Fundação Oswaldo Cruz , 21041-250 Rio de Janeiro, RJ , Brazil
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Gaspar A, Mohabbati M, Cagide F, Razzaghi-Asl N, Miri R, Firuzi O, Borges F. Searching for new cytotoxic agents based on chromen-4-one and chromane-2,4-dione scaffolds. Res Pharm Sci 2019; 14:74-83. [PMID: 30936935 PMCID: PMC6407335 DOI: 10.4103/1735-5362.251855] [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] [Indexed: 12/11/2022] Open
Abstract
Cancer is a major cause of death worldwide and novel anticancer agents for its better management are much needed. Benzopyrone-based compounds, such as chromones, possess several distinctive chemical and biological properties, of which the cytotoxicity against cancer cells seems to be prominent. In this study, two series of compounds based on chromen-4-one (3-10) and chromane-2,4-dione (11-18) scaffolds were synthesized in moderate/high yields and evaluated for cytotoxicity against HL-60, MOLT-4, and MCF-7 cancer cells using MTT assay. In general, the compounds exhibited moderate cytotoxic effects against the cancer cell lines, among which, a superior potency could be observed against MOLT-4 cells. Chroman-2,4-dione (11-18) derivatives had overall higher potencies compared to their chromen-4-one (3-10) counterparts. Compound 13 displayed the lowest IC50 values against HL-60 (IC50, 42.0 ± 2.7 μM) and MOLT-4 cell lines (IC50, 24.4 ± 2.6 μM), while derivative 11 showed the highest activity against MCF-7 cells (IC50, 68.4 ± 3.9 μM). In conclusion, this study provides important information on the cytotoxic effects of chromone derivatives. Benzochroman-2,4-dione has been identified as a promising scaffold, which its potency can be modulated by tailored synthesis with the aim of finding novel and dissimilar anticancer compounds.
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Affiliation(s)
- Alexandra Gaspar
- CIQUP/Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, 4169-007 Porto, Portugal
| | - Maryam Mohabbati
- Medicinal and Natural Products Chemistry Research Center, Shiraz University of Medical Sciences, Shiraz, I.R. Iran
| | - Fernando Cagide
- CIQUP/Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, 4169-007 Porto, Portugal
| | - Nima Razzaghi-Asl
- Department of Medicinal Chemistry, School of Pharmacy, Ardabil University of Medical Sciences, Ardabil, I.R. Iran.,Drugs and Advanced Sciences Research Center, School of Pharmacy, Ardabil University of Medical Sciences, Ardabil, I.R. Iran
| | - Ramin Miri
- Medicinal and Natural Products Chemistry Research Center, Shiraz University of Medical Sciences, Shiraz, I.R. Iran
| | - Omidreza Firuzi
- Medicinal and Natural Products Chemistry Research Center, Shiraz University of Medical Sciences, Shiraz, I.R. Iran
| | - Fernanda Borges
- CIQUP/Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, 4169-007 Porto, Portugal
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Gomes LR, Low JN, Cagide F, Gaspar A, Borges F. A comparison of the structures of some 2- and 3-substituted chromone derivatives: a structural study on the importance of the secondary carboxamide backbone for the inhibitory activity of MAO-B. Acta Crystallogr E Crystallogr Commun 2015; 71:1270-7. [PMID: 26594490 PMCID: PMC4645046 DOI: 10.1107/s2056989015017958] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2015] [Accepted: 09/25/2015] [Indexed: 11/30/2022]
Abstract
The crystal structures of the 3-substituted tertiary chromone carboxamide derivative, C17H13NO3, N-methyl-4-oxo-N-phenyl-4H-chromene-3-carboxamide (1), and the chromone carbonyl pyrrolidine derivatives, C14H13NO3, 3-(pyrrolidine-1-carbon-yl)-4H-chromen-4-one (3) and 2-(pyrrolidine-1-carbon-yl)-4H-chromen-4-one (4) have been determined. Their structural features are discussed and compared with similar compounds namely with respect to their MAO-B inhibitory activities. The chromone carboxamide presents a -syn conformation with the aromatic rings twisted with respect to each other [the dihedral angle between the mean planes of the chromone system and the exocyclic phenyl ring is 58.48 (8)°]. The pyrrolidine derivatives also display a significant twist: the dihedral angles between the chromone system and the best plane formed by the pyrrolidine atoms are 48.9 (2) and 23.97 (12)° in (3) and (4), respectively. Compound (3) shows a short C-H⋯O intra-molecular contact forming an S(7) ring. The supra-molecular structures for each compound are defined by weak C-H⋯O hydrogen bonds, which link the mol-ecules into chains and sheets. The Cambridge Structural Database gave 45 hits for compounds with a pyrrolidinecarbonyl group. A simple statistical analysis of their geometric parameters is made in order to compare them with those of the mol-ecules determined in the present work.
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Affiliation(s)
- Ligia R. Gomes
- FP-ENAS-Faculdade de Ciências de Saúde, Escola Superior de Saúde da UFP, Universidade Fernando Pessoa, Rua Carlos da Maia, 296, P-4200-150 Porto, Portugal
- REQUIMTE/Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, 4169-007 Porto, Portugal
| | - John Nicolson Low
- Department of Chemistry, University of Aberdeen, Meston Walk, Old Aberdeen, AB24 3UE, Scotland
| | - Fernando Cagide
- CIQUP/Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, 4169-007 Porto, Portugal
| | - Alexandra Gaspar
- CIQUP/Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, 4169-007 Porto, Portugal
| | - Fernanda Borges
- CIQUP/Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, 4169-007 Porto, Portugal
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Gomes LR, Low JN, Cagide F, Borges F. The crystal structures of four N-(4-halophen-yl)-4-oxo-4H-chromene-3-carboxamides. Acta Crystallogr E Crystallogr Commun 2015; 71:88-93. [PMID: 25705460 PMCID: PMC4331845 DOI: 10.1107/s2056989014027054] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2014] [Accepted: 12/09/2014] [Indexed: 11/10/2022]
Abstract
In four N-(4-halophenyl)-4-oxo-4H-chromene-3-carboxamides, halo = -F, -Cl, -Br and -I, the molecules are essentially planar and exhibit anti conformations with respect to the C—N rotamer of the amide and with cis geometries with respect to the relative positions of the C3arom—C2arom bond of the chromone ring and the carbonyl group of the amide. Four N-(4-halophenyl)-4-oxo-4H-chromene-3-carboxamides (halo = F, Cl, Br and I), N-(4-fluorophenyl)-4-oxo-4H-chromene-3-carboxamide, C16H10FNO3, N-(4-chlorophenyl)-4-oxo-4H-chromene-3-carboxamide, C16H10ClNO3, N-(4-bromophenyl)-4-oxo-4H-chromene-3-carboxamide, C16H10BrNO3, N-(4-iodophenyl)-4-oxo-4H-chromene-3-carboxamide, C16H10INO3, have been structurally characterized. The molecules are essentially planar and each exhibits an anti conformation with respect to the C—N rotamer of the amide and a cis geometry with respect to the relative positions of the Carom—Carom bond of the chromone ring and the carbonyl group of the amide. The structures each exhibit an intramolecular hydrogen-bonding network comprising an N—H⋯O hydrogen bond between the amide N atom and the O atom of the carbonyl group of the pyrone ring, forming an S(6) ring, and a weak Carom—H⋯O interaction with the O atom of the carbonyl group of the amide as acceptor, which forms another S(6) ring. All four compounds have the same supramolecular structure, consisting of R22(13) rings that are propagated along the a-axis direction by unit translation. There is π–π stacking involving inversion-related molecules in each structure.
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Affiliation(s)
- Ligia R Gomes
- FP-ENAS-Faculdade de Ciências de Saúde, Escola Superior de Saúde da UFP, Universidade Fernando Pessoa, Rua Carlos da Maia, 296, P-4200-150 Porto, Portugal
| | - John Nicolson Low
- Department of Chemistry, University of Aberdeen, Meston Walk, Old Aberdeen, AB24 3UE, Scotland
| | - Fernando Cagide
- CIQ/Departamento de Quιmica e Bioquιmica, Faculdade de Ciências, Universidade do Porto, 4169-007 Porto, Portugal
| | - Fernanda Borges
- CIQ/Departamento de Quιmica e Bioquιmica, Faculdade de Ciências, Universidade do Porto, 4169-007 Porto, Portugal
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Reis J, Gaspar A, Borges F, Gomes LR, Low JN. 4-Oxo-N-phenyl-4H-chromene-2-carboxamide and of a new polymorph of 7-methoxy-4-oxo-N-p-tolyl-4H-chromene-2-carboxamide and its hemihydrate. Acta Crystallogr C 2013; 69:1527-33. [PMID: 24311505 DOI: 10.1107/s0108270113029727] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2013] [Accepted: 10/29/2013] [Indexed: 11/11/2022] Open
Abstract
4-Oxo-N-phenyl-4H-chromene-2-carboxamide, C16H11NO3, crystallizes in the space group P2(1)/n and its derivative 7-methoxy-4-oxo-N-p-tolyl-4H-chromene-2-carboxamide, C18H15NO4, forms two polymorphs which crystallize in the space groups P2(1)/c and P1. The structures have an anti-rotamer conformation about the C-N bond; however, the amide O atom can be either trans- or cis-related to the O atom of the pyran ring. The latter compound also crystallizes as a hemihydrate, C18H15NO4·0.5H2O, in the space group C2/c. This compound has a similar structure to that of the unsolvated compound.
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Affiliation(s)
- Joana Reis
- CIQ/Departamento de Quιmica e Bioquιmica, Faculdade de Ciências, Universidade do Porto, 4169-007 Porto, Portugal
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Gomes LR, Low JN, Borges F, Cagide F. Two polymorphs of N-(2-methoxyphenyl)-4-oxo-4H-chromone-3-carboxamide. Acta Crystallogr C 2013; 69:927-33. [PMID: 23907891 DOI: 10.1107/s0108270113017538] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2013] [Accepted: 06/25/2013] [Indexed: 01/10/2023] Open
Abstract
The title compound, C₁₇H₁₃NO₄, crystallizes in two polymorphic forms, each with two molecules in the asymmetric unit and in the monoclinic space group P2₁/c. All of the molecules have intramolecular hydrogen bonds involving the amide group. The amide N atoms act as donors to the carbonyl group of the pyrone and also to the methoxy group of the benzene ring. The carbonyl O atom of the amide group acts as an acceptor of the β and β' C atoms belonging to the aromatic rings. These intramolecular hydrogen bonds have a profound effect on the molecular conformation. In one polymorph, the molecules in the asymmetric unit are linked to form dimers by weak C-H∙∙∙O interactions. In the other, the molecules in the asymmetric unit are linked by a single weak C-H∙∙∙O hydrogen bond. Two of these units are linked to form centrosymmetric tetramers by a second weak C-H∙∙∙O interaction. Further interactions of this type link the molecules into chains, so forming a three-dimensional network. These interactions in both polymorphs are supplemented by π-π interactions between the chromone rings and between the chromone and methoxyphenyl rings.
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Affiliation(s)
- Ligia R Gomes
- REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal
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