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Oliva-Colunga C, Sánchez García JJ, Flores-Alamo M, Klimova EI. 2-Ferrocenyl-2-[(2-ferrocenylethen-yl)(morpholin-4-yl)meth-yl]-1,3-di-thiol-ane. IUCrdata 2024; 9:x240234. [PMID: 38586524 PMCID: PMC10993561 DOI: 10.1107/s2414314624002347] [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] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Accepted: 03/11/2024] [Indexed: 04/09/2024] Open
Abstract
The mol-ecular structure of 2-ferrocenyl-2-[(2-ferrocenylethen-yl)(morpholin-4-yl)meth-yl]-1,3-di-thiol-ane, [Fe2(C5H5)2(C19H21NOS2)] or C29H31Fe2NOS2, has the ferrocenyl fragments in a trans disposition with respect to the vinyl group. One of the methyl-ene groups is disordered over two sites with occupancies of 0.782 (13):0.218 (13). In the crystal, cyclo-penta-dienyl-C-H⋯O(morpholin-yl) inter-actions feature within helical chains parallel to the c-axis direction. The chains are connected by methyl-ene- and cyclo-penta-dienyl-C-H⋯O(cyclo-penta-dien-yl) inter-actions.
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Affiliation(s)
- Claudia Oliva-Colunga
- Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, Ciudad de México, 04510, Mexico
| | - Jessica J. Sánchez García
- Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, Ciudad de México, 04510, Mexico
| | - Marcos Flores-Alamo
- Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, Ciudad de México, 04510, Mexico
| | - Elena I. Klimova
- Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, Ciudad de México, 04510, Mexico
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2
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Sánchez-Lara E, Favela R, Tzian K, Monroy-Torres B, Romo-Pérez A, Ramírez-Apan MT, Flores-Alamo M, Rodríguez-Diéguez A, Cepeda J, Castillo I. Effects of the tetravanadate [V 4O 12] 4- anion on the structural, magnetic, and biological properties of copper/phenanthroline complexes. J Biol Inorg Chem 2024; 29:139-158. [PMID: 38175299 PMCID: PMC11001746 DOI: 10.1007/s00775-023-02035-9] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Accepted: 10/30/2023] [Indexed: 01/05/2024]
Abstract
The aim to access linked tetravanadate [V4O12]4- anion with mixed copper(II) complexes, using α-amino acids and phenanthroline-derived ligands, resulted in the formation of four copper(II) complexes [Cu(dmb)(Gly)(OH2)]2[Cu(dmb)(Gly)]2[V4O12]·9H2O (1) [Cu(dmb)(Lys)]2[V4O12]·8H2O (2), [Cu(dmp)2][V4O12]·C2H5OH·11H2O (3), and [Cu(dmp)(Gly)Cl]·2H2O (4), where dmb = 4,4'-dimethioxy-2,2'-bipyridine; Gly = glycine; Lys = lysine; and dmp = 2,9-dimethyl-1,10-phenanthroline. The [V4O12]4- anion is functionalized with mixed copper(II) units in 1 and 2; while in 3, it acts as a counterion of two [Cu(dmp)]2+ units. Compound 4 crystallized as a unit that did not incorporate the vanadium cluster. All compounds present magnetic couplings arising from Cu⋯O/Cu⋯Cu bridges. Stability studies of water-soluble 3 and 4 by UV-Vis spectroscopy in cell culture medium confirmed the robustness of 3, while 4 appears to undergo ligand scrambling over time, resulting partially in the stable species [Cu(dmp)2]+ that was also identified by electrospray ionization mass spectrometry at m/z = 479. The in vitro cytotoxicity activity of 3 and 4 was determined in six cancer cell lines; the healthy cell line COS-7 was also included for comparative purposes. MCF-7 cells were more sensitive to compound 3 with an IC50 value of 12 ± 1.2 nmol. The tested compounds did not show lipid peroxidation in the TBARS assay, ruling out a mechanism of action via reactive oxygen species formation. Both compounds inhibited cell migration at 5 µM in wound-healing assays using MCF-7, PC-3, and SKLU-1 cell lines, opening a new window to study the anti-metastatic effect of mixed vanadium-copper(II) systems.
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Affiliation(s)
- Eduardo Sánchez-Lara
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Interior, CU, 04510, Ciudad de Mexico, Mexico.
| | - Roberto Favela
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Interior, CU, 04510, Ciudad de Mexico, Mexico
| | - Kitze Tzian
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Interior, CU, 04510, Ciudad de Mexico, Mexico
| | - Brian Monroy-Torres
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Interior, CU, 04510, Ciudad de Mexico, Mexico
| | - Adriana Romo-Pérez
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Interior, CU, 04510, Ciudad de Mexico, Mexico
| | - María Teresa Ramírez-Apan
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Interior, CU, 04510, Ciudad de Mexico, Mexico
| | - Marcos Flores-Alamo
- Facultad de Química, Universidad Nacional Autónoma de México, Circuito Exterior, CU, 04510, Ciudad de Mexico, Mexico
| | - Antonio Rodríguez-Diéguez
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Granada, Avda. Fuentenueva, 18071, Granada, Spain
| | - Javier Cepeda
- Departamento de Química Aplicada, Facultad de Química, Universidad del País Vasco UPV/EHU, 20018, Donostia-San Sebastian, Spain
| | - Ivan Castillo
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Interior, CU, 04510, Ciudad de Mexico, Mexico.
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3
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Aguilar-Lugo C, Flores-Alamo M, Sánchez García JJ, Klimova EI. 4,6-Diferrocenyl-5-(morpholin-4-yl)-1,2,3-triazine. IUCrdata 2023; 8:x230616. [PMID: 37693788 PMCID: PMC10483539 DOI: 10.1107/s2414314623006168] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Accepted: 07/13/2023] [Indexed: 09/12/2023] Open
Abstract
The structure of the title Fe complex, [Fe(C5H5)2(C17H16N4O)], was determined at 130 K, and has ortho-rhom-bic (Pna21) symmetry. It is of inter-est with respect to the class of triazine heterocyclic compounds: the triazine ring is substituted by two ferrocenyl and one morpholine groups. The crystal structure features C-H⋯O and C-H⋯N non-classical hydrogen bonds.
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Affiliation(s)
- Carla Aguilar-Lugo
- Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, Ciudad de México, 04510, Mexico
| | - Marcos Flores-Alamo
- Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, Ciudad de México, 04510, Mexico
| | - Jessica J. Sánchez García
- Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, Ciudad de México, 04510, Mexico
| | - Elena I. Klimova
- Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, Ciudad de México, 04510, Mexico
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4
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Chavez-Urias I, López-González LE, Plascencia-Martínez DF, García JJ, Flores-Alamo M, Sugich-Miranda R, Medrano F, Picos-Corrales LA, López-Gastélum KA, Velázquez-Contreras EF, Rocha-Alonzo F. l-Isoleucine-Schiff Base Copper(II) Coordination Polymers: Crystal Structure, Spectroscopic, Hirshfeld Surface, and DFT Analyses. ACS Omega 2023; 8:24601-24614. [PMID: 37457461 PMCID: PMC10339395 DOI: 10.1021/acsomega.3c02878] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Accepted: 06/13/2023] [Indexed: 07/18/2023]
Abstract
A new copper(II) coordination polymer was synthesized from the l-isoleucine-Schiff base and characterized by elemental analysis, Fourier transform infrared (FT-IR) spectroscopy, ultraviolet-visible (UV-vis) spectroscopy, single-crystal X-ray diffraction (XRD) analysis, electronic paramagnetic resonance, and thermogravimetric analysis. XRD analysis confirmed the square planar coordination geometry of metallic centers and a zipper-like polymer structure. Vibrational, electronic, and paramagnetic spectroscopies and thermal analysis were consistent with the crystal structure. A Hirshfeld surface (HS) and density functional theory (DFT) analyses were employed to gain additional insight into interactions responsible for complex packing. The quantitative examination of two-dimensional (2D) fingerprint plots revealed, among other van der Waals forces, the dominating participation of H···H and H···Cl interactions in the molecular packing. The use of computational methods provided great help in detailing the supramolecular interactions occurring in the crystal, which were mainly van der Waals attractions. The electronic transition analysis helped corroborate the electronic transitions observed experimentally in the absorption spectrum. The frequency and vibrational mode analysis gave a deeper insight into the characterization of the CuLCL complex.
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Affiliation(s)
- Iván
F. Chavez-Urias
- Departamento
de Investigación en Polímeros y Materiales, Universidad de Sonora, Calle Rosales y Blvd. Luis Encinas s/n, Col. Centro, Hermosillo, Sonora 83000, México
| | - Luis E. López-González
- Centro
de Investigación Científica y de Educación Superior
de Ensenada, Carretera Tijuana-Ensenada 3918, Zona Playitas, Ensenada, Baja California 22860, México
| | - Damian F. Plascencia-Martínez
- Departamento
de Investigación en Polímeros y Materiales, Universidad de Sonora, Calle Rosales y Blvd. Luis Encinas s/n, Col. Centro, Hermosillo, Sonora 83000, México
| | - Juventino J. García
- Facultad
de Química, Universidad Nacional
Autónoma de México, Circuito Exterior Cd. Universitaria, Coyoacán,
Ciudad de México, Ciudad de México 04510, México
| | - Marcos Flores-Alamo
- Facultad
de Química, Universidad Nacional
Autónoma de México, Circuito Exterior Cd. Universitaria, Coyoacán,
Ciudad de México, Ciudad de México 04510, México
| | - Rocío Sugich-Miranda
- Departamento
de Ciencias Químico-Biológicas, Universidad de Sonora, Calle Rosales y Blvd. Luis Encinas s/n, Col. Centro, Hermosillo, Sonora 83000, México
| | - Felipe Medrano
- Departamento
de Ciencias Químico-Biológicas, Universidad de Sonora, Calle Rosales y Blvd. Luis Encinas s/n, Col. Centro, Hermosillo, Sonora 83000, México
| | - Lorenzo A. Picos-Corrales
- Facultad
de Ingeniería Culiacán, Universidad
Autónoma de Sinaloa, Ciudad Universitaria, Culiacán, Sinaloa 80013, México
| | - Karla-Alejandra López-Gastélum
- Departamento
de Ciencias Químico-Biológicas, Universidad de Sonora, Calle Rosales y Blvd. Luis Encinas s/n, Col. Centro, Hermosillo, Sonora 83000, México
- Centro de
Investigación en Alimentación y Desarrollo, Carretera a Ejido La Victoria Km
0.6, Hermosillo, Sonora 83304, México
| | - Enrique F. Velázquez-Contreras
- Departamento
de Investigación en Polímeros y Materiales, Universidad de Sonora, Calle Rosales y Blvd. Luis Encinas s/n, Col. Centro, Hermosillo, Sonora 83000, México
| | - Fernando Rocha-Alonzo
- Departamento
de Ciencias Químico-Biológicas, Universidad de Sonora, Calle Rosales y Blvd. Luis Encinas s/n, Col. Centro, Hermosillo, Sonora 83000, México
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5
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Bivián-Castro EY, Flores-Alamo M, Escudero R, Gómez-Vidal V, Segoviano-Garfias JJN, Castañeda-Contreras J, Saavedra-Arroyo QE. Synthesis and Characterization of a New Cu(II) Paddle-Wheel-like Complex with 4-Vinylbenzoate as an Inorganic Node for Metal-Organic Framework Material Design. Materials (Basel) 2023; 16:4866. [PMID: 37445180 DOI: 10.3390/ma16134866] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 06/25/2023] [Accepted: 06/29/2023] [Indexed: 07/15/2023]
Abstract
A new Cu(II) paddle-wheel-like complex with 4-vinylbenzoate was synthesized using acetonitrile as the solvent. The complex was characterized by X-ray crystal diffraction, FT-IR, diffuse reflectance spectroscopy, thermogravimetric, differential scanning calorimetric, magnetic susceptibility, and electronic paramagnetic resonance analyses. The X-ray crystal diffraction analysis indicated that each copper ion was bound at an equatorial position to four oxygen atoms from the carboxylate groups of the 4-vinylbenzoate ligand in a square-based pyramidal geometry. The distance between the copper ions was 2.640(9) Å. The acetonitrile molecules were coordinated at the axial position to the copper ions. Exposure of the Cu(II) complex to humid air promoted the gradual replacement of the coordinated acetonitrile by water molecules, but the complex structure integrity remained. The EPR spectra exhibited signals attributed to the presence of a mixture of the monomeric (S = ½) and dimeric (S = 1) copper species in a possible 3:1 ratio. The magnetic studies revealed a peak at 50-100 K, which could be associated with the oxygen absorption capacity of the Cu(II)-vba complex.
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Affiliation(s)
- Egla Yareth Bivián-Castro
- Centro Universitario de los Lagos, Universidad de Guadalajara, Av. Enrique Díaz de León 1144, Col. Paseos de la Montaña, Lagos de Moreno 47460, Jalisco, Mexico
| | - Marcos Flores-Alamo
- Facultad de Química, Universidad Nacional Autónoma de México, Av. Universidad 3000, Circuito Exterior S/N, Coyoacán, Mexico City 04510, Mexico
| | - Roberto Escudero
- Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Av. Universidad 3000, Circuito Exterior S/N, Coyoacán, Mexico City 04510, Mexico
| | - Virginia Gómez-Vidal
- Instituto de Química, Universidad Nacional Autónoma de México, Av. Universidad 3000, Circuito Exterior S/N, Coyoacán, Mexico City 04510, Mexico
| | - José J N Segoviano-Garfias
- División de Ciencias de la Vida, Carr. Irapuato-Silao Km. 12.5, Ex-Hacienda El Copal, Irapuato 36821, Guanajuato, Mexico
| | - Jesus Castañeda-Contreras
- Centro Universitario de los Lagos, Universidad de Guadalajara, Av. Enrique Díaz de León 1144, Col. Paseos de la Montaña, Lagos de Moreno 47460, Jalisco, Mexico
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6
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Hernández-Toledo HC, Flores-Alamo M, Castillo I. Bis(benzimidazole)amino thio- and selenoether Iron(II) complexes as proton reduction electrocatalysts. J Inorg Biochem 2023; 241:112128. [PMID: 36701986 DOI: 10.1016/j.jinorgbio.2023.112128] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Revised: 01/10/2023] [Accepted: 01/14/2023] [Indexed: 01/22/2023]
Abstract
Two novel Iron (II) complexes featuring tetrapodal bis(benzimidazole)amino thio- and selenoether ligands (LS and LSe) were synthesized, characterized, and tested as electrocatalysts for the hydrogen evolution reaction. The bromide complexes [Fe(LS,LSe)Br2] (1-2) are highly insoluble, but their DMSO solvates were characterized by single crystal X-ray diffraction, revealing an octahedral coordination environment that does not feature coordination of the chalcogen atoms. The corresponding triflate derivatives [Fe(LS,LSe)(MeCN)3]OTf2 (1c-2c) were employed for electrocatalytic proton reduction, with 1c exhibiting higher activity, thus suggesting that the thioether may participate as a more competent pendant ligand for proton transfer.
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Affiliation(s)
- Hugo C Hernández-Toledo
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, CU 04510, Mexico
| | - Marcos Flores-Alamo
- Facultad de Química, División de Estudios de Posgrado, Universidad Nacional Autónoma de México, Circuito Exterior, CU 04510, Mexico
| | - Ivan Castillo
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, CU 04510, Mexico.
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7
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González-González JS, Pérez-Espinoza S, Martínez-Martínez FJ, Pineda-Contreras A, Canseco-Martínez MÁ, Flores-Alamo M, García-Ortega H. Crystal structure and characterization of the sulfamethazine-piperidine salt. Acta Crystallogr C Struct Chem 2023; 79:71-76. [PMID: 36871288 PMCID: PMC9985947 DOI: 10.1107/s2053229622012050] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [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: 11/10/2022] [Accepted: 12/21/2022] [Indexed: 02/12/2023] Open
Abstract
Sulfamethazine [N1-(4,6-dimethylpyrimidin-2-yl)sulfanilamide] is an antimicrobial drug that possesses functional groups capable of acting as hydrogen-bond donors and acceptors, which make it a suitable supramolecular building block for the formation of cocrystals and salts. We report here the crystal structure and solid-state characterization of the 1:1 salt piperidinium sulfamethazinate (PPD+·SUL-, C5H12N+·C12H13N4O2S-) (I). The salt was obtained by the solvent-assisted grinding method and was characterized by IR spectroscopy, powder X-ray diffraction, solid-state 13C NMR spectroscopy and thermal analysis [differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA)]. Salt I crystallized in the monoclinic space group P21/n and showed a 1:1 stoichiometry revealing proton transfer from SUL to PPD to form salt I. The PPD+ and SUL- ions are connected by N-H+...O and N-H+...N interactions. The self-assembly of SUL- anions displays the amine-sulfa C(8) motif. The supramolecular architecture of salt I revealed the formation of interconnected supramolecular sheets.
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Affiliation(s)
- Juan Saulo González-González
- Instituto de Farmacobiología, Universidad de la Cañada, Carretera Teotitlán-San Antonio Nanahuatipán, km 1.7 s/n, Teotitlán de Flores Magón, Oaxaca, 68540, Mexico
| | - Salvador Pérez-Espinoza
- Instituto de Farmacobiología, Universidad de la Cañada, Carretera Teotitlán-San Antonio Nanahuatipán, km 1.7 s/n, Teotitlán de Flores Magón, Oaxaca, 68540, Mexico
| | | | - Armando Pineda-Contreras
- Facultad de Ciencias Químicas, Universidad de Colima, km 9 Carretera Colima-Coquimatlán, Coquimatlán, Colima, 28400, Mexico
| | | | - Marcos Flores-Alamo
- Facultad de Química, Universidad Nacional Autónoma de México, 04510, Ciudad de México, Mexico
| | - Héctor García-Ortega
- Facultad de Química, Universidad Nacional Autónoma de México, 04510, Ciudad de México, Mexico
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8
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Bivián-Castro EY, Zepeda-Navarro A, Guzmán-Mar JL, Flores-Alamo M, Mata-Ortega B. Ion-Imprinted Polymer Structurally Preorganized Using a Phenanthroline-Divinylbenzoate Complex with the Cu(II) Ion as Template and Some Adsorption Results. Polymers (Basel) 2023; 15:polym15051186. [PMID: 36904427 PMCID: PMC10007393 DOI: 10.3390/polym15051186] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 02/17/2023] [Accepted: 02/21/2023] [Indexed: 03/03/2023] Open
Abstract
The novel [Cuphen(VBA)2H2O] complex (phen: phenanthroline, VBA: vinylbenzoate) was prepared and used as a functional monomer to preorganize a new ion-imprinted polymer (IIP). By leaching the Cu(II) from the molecular imprinted polymer (MIP), [Cuphen(VBA)2H2O-co-EGDMA]n (EGDMA: ethylene glycol dimethacrylate), the IIP was obtained. A non-ion-imprinted polymer (NIIP) was also prepared. The crystal structure of the complex and some physicochemical, spectrophotometric techniques were also used for the MIP, IIP, and NIIP characterization. The results showed that the materials are nonsoluble in water and polar solvents, which are the main features of polymers. The surface area of the IIP is higher than the NIIP demonstrated by the blue methylene method. The SEM images show monoliths and particles smoothly packed together on spherical and prismatic-spherical surfaces in the morphology of MIP and IIP, respectively. Moreover, the MIP and IIP could be considered as mesoporous and microporous materials, shown by the size of the pores determined by the BET and BJH methods. Furthermore, the adsorption performance of the IIP was studied using copper(II) as a contaminant heavy metal. The maximum adsorption capacity of IIP was 287.45 mg/g at 1600 mg/L Cu2+ ions with 0.1 g of IIP at room temperature. The Freundlich model was found to best describe the equilibrium isotherm of the adsorption process. The competitive results indicate that the stability of the Cu-IIP complex is higher than the Ni-IIP complex with a selectivity coefficient of 1.61.
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Affiliation(s)
- Egla Yareth Bivián-Castro
- Centro Universitario de los Lagos, Universidad de Guadalajara, Av. Enrique Díaz de León 1144, Col. Paseos de la Montaña, Lagos de Moreno 47460, Jalisco, Mexico
- Correspondence: ; Tel.: +52-(474)-7424314 (ext. 66576)
| | - Abraham Zepeda-Navarro
- Centro Universitario de los Lagos, Universidad de Guadalajara, Av. Enrique Díaz de León 1144, Col. Paseos de la Montaña, Lagos de Moreno 47460, Jalisco, Mexico
| | - Jorge Luis Guzmán-Mar
- Facultad de Ciencias Químicas, Universidad Autónoma de Nuevo León (UANL), Ave. Universidad s/n, Cd. Universitaria, San Nicolás de los Garza 66455, Nuevo León, Mexico
| | - Marcos Flores-Alamo
- Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, Ciudad de México 04510, Ciudad de México, Mexico
| | - Brenda Mata-Ortega
- Centro Universitario de los Lagos, Universidad de Guadalajara, Av. Enrique Díaz de León 1144, Col. Paseos de la Montaña, Lagos de Moreno 47460, Jalisco, Mexico
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9
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Vazquez-Chavez J, Martínez-Torres FC, Navarro-Huerta A, Flores-Alamo M, Maldonado-Domínguez M, Blahut J, Štoček JR, Dračínský M, Rodríguez-Molina B, Iglesias-Arteaga MA. A Crystalline Dimeric Steroidal Diboronate with Electronically Impeded Rotation. J Org Chem 2023; 88:49-59. [PMID: 36480791 DOI: 10.1021/acs.joc.2c01676] [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: 12/13/2022]
Abstract
The dimeric steroid SMR-3, featuring a 1,4-phenyldiboronic ester flanked by two pregnan-triol frameworks, was synthesized to explore the intramolecular dynamics of its central component. The structural data from single-crystal X-ray diffraction studies and the Hirshfeld analyses indicate small steric effects around the aromatic ring that should favor the intended motion. However, solid-state NMR data obtained through VT 13C{1H} CPMAS and 2H spin-echo experiments, using the deuterated analogue SMR-3D4, revealed that this component is rigid even at temperatures where other reported steroidal molecular rotors experience fast rotation (85 °C). A combination of classical molecular dynamics, molecular mechanics, and correlated ab initio calculations allowed us to distinguish the steric and electronic factors that restrict the potential motion in this compound. The experimental and computational data reveal that electronic components dominate the behavior and are responsible for the high rotational barrier in the SMR-3 crystal.
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Affiliation(s)
- Josué Vazquez-Chavez
- Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510 Ciudad de México, México
| | - Fátima C Martínez-Torres
- Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510 Ciudad de México, México
| | - Armando Navarro-Huerta
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, 04510 Ciudad de México, México
| | - Marcos Flores-Alamo
- Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510 Ciudad de México, México
| | | | - Jan Blahut
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nám. 2, 160 00 Prague, Czech Republic
| | - Jakub Radek Štoček
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nám. 2, 160 00 Prague, Czech Republic
| | - Martin Dračínský
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nám. 2, 160 00 Prague, Czech Republic
| | - Braulio Rodríguez-Molina
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, 04510 Ciudad de México, México
| | - Martín A Iglesias-Arteaga
- Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510 Ciudad de México, México
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10
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Hernández-Pacheco P, Zelada-Guillen GA, Flores-Alamo M, Escárcega-Bobadilla MV. Supramolecular host-guest and fluorescence studies on Ni-Salphen complex as a binding unit on edge oxidised graphene oxide grafted nanomaterial. Supramol Chem 2022. [DOI: 10.1080/10610278.2022.2159824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
| | | | - Marcos Flores-Alamo
- Facultad de Química, Universidad Nacional Autónoma de México, Ciudad de Mexico, Mexico
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11
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Berlanga-Vázquez A, Talmazan RA, Reyes-Mata CA, Percástegui EG, Flores-Alamo M, Podewitz M, Castillo I. Conformational effects of regioisomeric substitution on the catalytic activity of copper/calix[8]arene C–S coupling. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202200596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Affiliation(s)
| | - Radu A. Talmazan
- TU Wien: Technische Universitat Wien Institute of Materials Chemistry AUSTRIA
| | | | | | | | - Maren Podewitz
- TU Wien: Technische Universitat Wien Institute of Materials Chemistry AUSTRIA
| | - Ivan Castillo
- Universidad Nacional Autonoma de Mexico Instituto de Quimica Circuito Exterior, CU04510México 04510 Mexico MEXICO
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12
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Sánchez-García JJ, Flores-Alamo M, Nuñez-Gordillo A, Klimova EI. 4,5-Diferrocenyl-1,2-dithiole-3-thione. IUCr Data 2022; 7:x221011. [DOI: 10.1107/s2414314622010112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Accepted: 10/18/2022] [Indexed: 11/06/2022] Open
Abstract
The structure of 4,5-diferrocenyl-1,2-dithiole-3-thione, [Fe2(C5H5)2(C13H8S3)] or C23H18Fe2S3, at 130 K has monoclinic (P21/c) symmetry. The molecule has two ferrocenyl units attached to a 1,2-dithiole-3-thione moiety. It is of interest with respect to the question if the introduction of ferrocenyl substituents into biologically active molecules offers the potential to obtain more efficacious therapeutic drugs. The crystal structure displays intermolecular contacts of the C—H...S and S—π(C—C) types.
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13
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Ordonez M, Martínez-Toto EI, Morales-Solís JC, Flores-Alamo M. Diastereoselective Phosphonylation of Chiral Cyclic Imines for the Synthesis of Phosphoproline Derivatives. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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)
- Mario Ordonez
- Universidad Autonoma del Estado de Morelos Centro de Investigaciones Quimicas Av. Universidad 1001 62209 Cuernavaca MEXICO
| | | | | | - Marcos Flores-Alamo
- Universidad Nacional Autonoma de Mexico Facultad de Quimica Facultad de Química MEXICO
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14
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Ramírez-Rave S, Flores-Alamo M, Yatsimirsky AK. Structures, solvatochromism, protonation and photoswitching of tetra-( ortho)substituted azobenzenes bearing 3,5-dimethoxy groups. NEW J CHEM 2022. [DOI: 10.1039/d1nj05699a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Di-ortho-methoxy azobenzenes demonstrate high basicity, the ability to bind metal ions in water and an inverted solvent effect on the rate of thermal cis-to-trans isomerization, which decreases on increase in the solvent polarity.
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Affiliation(s)
- Sandra Ramírez-Rave
- Facultad de Química, Universidad Nacional Autónoma de México, 04510 CDMX, Mexico
| | - Marcos Flores-Alamo
- Facultad de Química, Universidad Nacional Autónoma de México, 04510 CDMX, Mexico
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15
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Robles-Marín E, Flores-Alamo M, Garcia JJ. Electrochemical activation of CO 2 by MOF-(Fe, Ni, Mn) derivatives of 5-aminoisophthalic acid and the thiazole group influence on its catalytic activity. NEW J CHEM 2022. [DOI: 10.1039/d2nj00364c] [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
The electrocatalysis of carbon dioxide using earth abundant metals and a functionalized MOF to find a sustainable process was investigated.
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Affiliation(s)
- Elvis Robles-Marín
- Facultad de Química, Universidad Nacional Autónoma de México, Mexico City, 04510, Mexico
| | - Marcos Flores-Alamo
- Facultad de Química, Universidad Nacional Autónoma de México, Mexico City, 04510, Mexico
| | - Juventino J. Garcia
- Facultad de Química, Universidad Nacional Autónoma de México, Mexico City, 04510, Mexico
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16
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López-Gastélum KA, Velázquez-Contreras EF, García JJ, Flores-Alamo M, Aguirre G, Chávez-Velasco D, Narayanan J, Rocha-Alonzo F. Mononuclear and Tetranuclear Copper(II) Complexes Bearing Amino Acid Schiff Base Ligands: Structural Characterization and Catalytic Applications. Molecules 2021; 26:molecules26237301. [PMID: 34885882 PMCID: PMC8658810 DOI: 10.3390/molecules26237301] [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] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Revised: 11/18/2021] [Accepted: 11/22/2021] [Indexed: 11/18/2022] Open
Abstract
Two new glycine-Schiff base copper(II) complexes were synthesized. Single crystal X-ray diffraction (SCXRD) allowed us to establish the structure of both complexes in the solid state. The glycine-Schiff base copper(II) complex derived from 2′-hydroxy-5′-nitroacetophenone showed a mononuclear hydrated structure, in which the Schiff base acted as a tridentate ligand, and the glycine-Schiff base copper(II) complex derived from 2′-hydroxy-5′-methylacetophenone showed a less common tetranuclear anhydrous metallocyclic structure, in which the Schiff base acted as a tetradentate ligand. In both compounds, copper(II) had a tetracoordinated square planar geometry. The results of vibrational, electronic, and paramagnetic spectroscopies, as well as thermal analysis, were consistent with the crystal structures. Both complexes were evaluated as catalysts in the olefin cyclopropanation by carbene transference, and both led to very high diastereoselectivity (greater than 98%).
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Affiliation(s)
- Karla-Alejandra López-Gastélum
- Departamento de Investigación en Polímeros y Materiales, Universidad de Sonora, Rosales and Luis Encinas s/n, Col. Centro, Hermosillo 83000, Sonora, Mexico
- Correspondence: (K.-A.L.-G.); (E.F.V.-C.); (F.R.-A.)
| | - Enrique F. Velázquez-Contreras
- Departamento de Investigación en Polímeros y Materiales, Universidad de Sonora, Rosales and Luis Encinas s/n, Col. Centro, Hermosillo 83000, Sonora, Mexico
- Correspondence: (K.-A.L.-G.); (E.F.V.-C.); (F.R.-A.)
| | - Juventino J. García
- Facultad de Química, Universidad Nacional Autónoma de México, Circuito Exterior Cd. Universitaria, Coyoacán, Ciudad de México 04510, Ciudad de México, Mexico; (J.J.G.); (M.F.-A.)
| | - Marcos Flores-Alamo
- Facultad de Química, Universidad Nacional Autónoma de México, Circuito Exterior Cd. Universitaria, Coyoacán, Ciudad de México 04510, Ciudad de México, Mexico; (J.J.G.); (M.F.-A.)
| | - Gerardo Aguirre
- Centro de Graduados e Investigación, Instituto Tecnológico de Tijuana, Apartado Postal 1166, Tijuana 22000, Baja California, Mexico; (G.A.); (D.C.-V.)
| | - Daniel Chávez-Velasco
- Centro de Graduados e Investigación, Instituto Tecnológico de Tijuana, Apartado Postal 1166, Tijuana 22000, Baja California, Mexico; (G.A.); (D.C.-V.)
| | - Jayanthi Narayanan
- División de Ingeniería en Nanotecnología, Universidad Politécnica del Valle de México, Av. Mexiquense s/n esquina Av. Universidad Politécnica, Col. Villa Esmeralda, Tultitlan 54910, Estado de México, Mexico;
| | - Fernando Rocha-Alonzo
- Departamento de Ciencias Químico Biológicas, Universidad de Sonora, Calle Rosales y Blvd. Luis Encinas s/n, Col. Centro, Hermosillo 83000, Sonora, Mexico
- Correspondence: (K.-A.L.-G.); (E.F.V.-C.); (F.R.-A.)
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17
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Vázquez JL, Velazco-Cabral I, Alvarado-Méndez E, Trejo-Durán M, Flores-Alamo M, Peña-Cabrera E, García-Revilla MA, Vázquez MA. Effect of the substituents of new coumarin-imidazo[1,2- a]heterocyclic-3-acrylate derivatives on nonlinear optical properties: a combined experimental-theoretical approach. Phys Chem Chem Phys 2021; 23:22466-22475. [PMID: 34585696 DOI: 10.1039/d1cp03396d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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
A series of new coumarin-imidazo[1,2-a]heterocyclic-3-acrylate derivatives 7a-h were synthesized by the Heck reaction between the corresponding 3-(imidazo[1,2-a]pyrimidines)-(2-yl)-2H-chromen-2-ones 4a-e and methyl acrylate in 45-87% yields. The effect of the distinct substituents on third-order nonlinear optical properties was examined, experimentally measuring their nonlinear refractive indexes by the Z-scan technique. Density functional theory and time-dependent density functional theory were utilized with the B3LYP, CAM-B3LYP, PBE (PBEPBE), and M062X functionals on Gaussian09 software to calculate the vertical excitation, relaxation of the brightest excited states, conformation, HOMO-LUMO gaps, oscillator strength, polarizability, and hyperpolarizabilities of all derivatives. Although all acrylates showed a nonlinear response at a certain level of power, the compounds bearing a diethylamino electron-donating group exhibited higher nonlinear refractive index values (∼10-9 cm2 W-1), which is in agreement with the trend in the computational calculations of the first and second hyperpolarization. According to the structural analysis, the electron-withdrawing group (acrylate) is mainly responsible for the loss of coplanarity because of increasing the dihedral angle between the coumarin and imidazo[1,2-a]heterocyclic moieties (to 39.1°). On the other hand, the unsubstituted compound 4a presented the greatest nonlinearity due to its almost coplanar structure (n2 ∼ 10-8 cm2 W-1), highlighting the importance of this feature.
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Affiliation(s)
- Juan Luis Vázquez
- Chemistry Department, DCNE, University of Guanajuato, Noria Alta s/n, 36050, Guanajuato, Gto, Mexico.
| | - Iván Velazco-Cabral
- Chemistry Department, DCNE, University of Guanajuato, Noria Alta s/n, 36050, Guanajuato, Gto, Mexico.
| | - Edgar Alvarado-Méndez
- Engineering Division Campus Irapuato-Salamanca, University of Guanajuato, Palo Blanco s/n, 36885, Salamanca, Gto, Mexico
| | - Mónica Trejo-Durán
- Engineering Division Campus Irapuato-Salamanca, University of Guanajuato, Palo Blanco s/n, 36885, Salamanca, Gto, Mexico
| | - Marcos Flores-Alamo
- Faculty of Chemistry, National Autonomous University of Mexico, Av. Insurgentes Sur S/N, 04510, DF, Mexico
| | - Eduardo Peña-Cabrera
- Chemistry Department, DCNE, University of Guanajuato, Noria Alta s/n, 36050, Guanajuato, Gto, Mexico.
| | - Marco A García-Revilla
- Chemistry Department, DCNE, University of Guanajuato, Noria Alta s/n, 36050, Guanajuato, Gto, Mexico.
| | - Miguel A Vázquez
- Chemistry Department, DCNE, University of Guanajuato, Noria Alta s/n, 36050, Guanajuato, Gto, Mexico.
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18
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Sánchez García JJ, Huerta Vargas G, Flores-Alamo M, Klimova EI. Transformations of (ferrocenylmethylidene)malononitrile under the action of molecular sulfur and NaHS. Mendeleev Communications 2021. [DOI: 10.1016/j.mencom.2021.07.038] [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: 10/20/2022]
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19
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Sánchez García JJ, Joo-Cisneros RS, García-Bassoco D, Flores-Alamo M, Stivalet JMM, García-Valdés J, Klimova EI. Synthesis, characterization, and oxidation electrochemistry of some novel 1,2-dithiol-3-ones and 1,2-dithiol-3-thiones containing aryl and metallocenyl fragments. J Organomet Chem 2021. [DOI: 10.1016/j.jorganchem.2021.121809] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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20
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Neira AC, Martínez-Alanis PR, Aullón G, Flores-Alamo M, Zerón P, Company A, Chen J, Kasper JB, Browne WR, Nordlander E, Castillo I. Correction to "Oxidative Cleavage of Cellobiose by Lytic Polysaccharide Monooxygenase (LPMO)-Inspired Copper Complexes". ACS Omega 2020; 5:28403. [PMID: 33163824 PMCID: PMC7643330 DOI: 10.1021/acsomega.0c04910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Indexed: 06/11/2023]
Abstract
[This corrects the article DOI: 10.1021/acsomega.9b00785.].
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21
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Muñoz-Patiño N, Sánchez-Eguía BN, Araiza-Olivera D, Flores-Alamo M, Hernández-Ortega S, Martínez-Otero D, Castillo I. Synthesis, structure, and biological activity of bis(benzimidazole)amino thio- and selenoether nickel complexes. J Inorg Biochem 2020; 211:111198. [PMID: 32801056 DOI: 10.1016/j.jinorgbio.2020.111198] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [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: 06/10/2020] [Revised: 06/25/2020] [Accepted: 07/13/2020] [Indexed: 12/28/2022]
Abstract
Four new nickel (II) complexes with bis(benzimidazole)thio- and selenoether-based ligands have been synthesized and characterized in the solid state by elemental analysis, IR, magnetic susceptibility and X-ray crystallography, and in solution by FAB+ mass spectrometry, UV-vis spectroscopy and cyclic voltammetry. Single-crystal X-ray diffraction analysis of the compounds revealed octahedral geometries for all nickel centers. Three of the four complexes are dimers with chloride bridges between the two Ni(II) ions. However, in solution all complexes have a monomeric formulation, based on mass spectrometry and osmometry measurements. The complexes were also screened for their cytotoxic activity on human cell lines (HeLa, SK-LU-1 and HEK-293), and compared with a related Cu(II) complex.
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Affiliation(s)
- Natalia Muñoz-Patiño
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, CU, 04510, Mexico
| | - Brenda N Sánchez-Eguía
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, CU, 04510, Mexico
| | - Daniela Araiza-Olivera
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, CU, 04510, Mexico
| | - Marcos Flores-Alamo
- Facultad de Química, División de Estudios de Posgrado, Universidad Nacional Autónoma de México, Circuito Exterior, CU, 04510, Mexico
| | - Simón Hernández-Ortega
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, CU, 04510, Mexico
| | - Diego Martínez-Otero
- Centro Conjunto de Investigación en Química Sustentable, UAEM-UNAM, 50200, Toluca, Estado de México, Mexico
| | - Ivan Castillo
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, CU, 04510, Mexico.
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22
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Vargas-Romero K, Martínez-Torres FC, Aguilar-Granda A, Pérez-Estrada S, Flores-Alamo M, Rodríguez-Molina B, Iglesias-Arteaga MA. Synthesis and Solid-State Dynamics of a Crystalline Steroid Molecular Rotor without the Alkyne Axle: Steroid Dimers Based on a 1,4-Di(1,3-dioxan-2-yl)benzene Moiety. J Org Chem 2020; 85:8501-8509. [PMID: 32475112 DOI: 10.1021/acs.joc.0c00867] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Two diastereomeric crystalline steroid dimers were obtained by acid-catalyzed double acetalization of (20S)-5α-pregnan-3β,16β,20-triol 3-monoacetate with terephtalaldehyde. These compounds were characterized by NMR in solution, MS, single-crystal X-ray diffraction, and variable-temperature solid-state NMR by 13C cross-polarization magic angle spinning (CPMAS). While the phenylene rotator in the SR diastereomer remains static even at 373 K, the RR isomer shows a slow rotational process of the phenylene ring at temperatures above room temperature and thus may be considered the first crystalline steroid molecular rotor without the alkyne axle.
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Affiliation(s)
- Katherine Vargas-Romero
- Facultad de Quı́mica, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510 Ciudad de México, México
| | - Fátima C Martínez-Torres
- Facultad de Quı́mica, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510 Ciudad de México, México
| | - Andrés Aguilar-Granda
- Instituto de Quı́mica, Universidad Nacional Autónoma de México, Ciudad Universitaria, Circuito Exterior, 04510 Ciudad de México, México
| | - Salvador Pérez-Estrada
- Área Académica de Quı́mica, Universidad Autónoma del Estado de Hidalgo, Carretera Pachuca-Tulancingo Km 4.5, Mineral de la Reforma, Hidalgo CP 42076, Mexico
| | - Marcos Flores-Alamo
- Facultad de Quı́mica, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510 Ciudad de México, México
| | - Braulio Rodríguez-Molina
- Instituto de Quı́mica, Universidad Nacional Autónoma de México, Ciudad Universitaria, Circuito Exterior, 04510 Ciudad de México, México
| | - Martín A Iglesias-Arteaga
- Facultad de Quı́mica, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510 Ciudad de México, México
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23
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Flores-Alamo M, Perez-Ortiz FJ, Arevalo A, Garcia JJ. [1,2-Bis(diisopropylphosphanyl)ethane-κ 2
P, P′](2-fluoro- N-{[(2-fluorophenyl)azanidyl]carbonyl}anilinido-κ 2
N, N′)nickel(II). IUCr Data 2020; 5:x200649. [PMID: 36337151 PMCID: PMC9462222 DOI: 10.1107/s2414314620006495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Accepted: 05/15/2020] [Indexed: 12/03/2022] Open
Abstract
The NiII atom in the title compound shows a distorted square-planar P2N2 coordination set provided by two bidentate ligands. The molecular structure of the title complex, [Ni(C13H8F2N2O)(C14H32P2)] or Ni(oFPU)(dippe), where oFPU is the dianion of bis(2-fluorophenyl)urea and dippe is 1,2-bis(di-isopropylphosphino)ethane, comprises an NiII atom with a distorted square-planar coordination environment (geometry index τ4 = 0.195). One of the fluorophenyl rings of the oFPU ligand is disordered over two sets of sites in an 0.832 (7):0.168 (7) ratio. The crystal structure displays C—H⋯O and C—H⋯F hydrogen-bonding interactions, leading to chains with R22(12) motifs extending parallel to [100]. The title compound might be of interest with respect to the production of urea and carbamate derivatives of nickel(II).![]()
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24
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Serrano-Vázquez HA, Flores-Alamo M, Iglesias-Arteaga MA. Synthesis of 23E-ethylidene spirostanes via the BF3·Et2O-catalyzed aldol condensation of steroid sapogenins and acetaldehyde. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.151918] [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: 10/24/2022]
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25
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Martínez-Aguirre MA, Flores-Alamo M, Medrano F, Yatsimirsky AK. Examination of pinanediol-boronic acid ester formation in aqueous media: relevance to the relative stability of trigonal and tetrahedral boronate esters. Org Biomol Chem 2020; 18:2716-2726. [PMID: 32211727 DOI: 10.1039/d0ob00201a] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The interaction of pinanediol with 2-fluorophenylboronic acid and several other substituted phenylboronic acids was studied in 40% vol. aqueous acetonitrile by 1H and 11B NMR, potentiometric and spectrophotometric titrations at variable pH values. The experimental results reveal the formation of a very stable trigonal ester (Ktrig ≈ 2 × 104 M-1) and a significantly less stable tetrahedral hydroxocomplex (Ktet ≈ 5 × 103 M-1) in contrast to the traditionally observed inverted order of stabilities Ktrig < Ktet. Comparison of the crystal structure of the trigonal ester isolated from aqueous acetonitrile with the DFT simulated structure of the respective hydroxocomplex shows that an unusual order of stabilities Ktrig > Ktet is observed in spite of the existence of the usual strain release effect in the O-B-O angle considered responsible for the typically observed increased stability of the tetrahedral hydroxocomplex. A complementary study of the stability of the six-membered cyclic boronate esters of chromotropic acid demonstrated the order Ktrig ≪ Ktet although the strain was absent in these esters. The results for m-, p-substituted phenylboronic acids show that the stability of both five- and six-membered trigonal esters formed with pinanediol and chromotropic acid, respectively, is insensitive to electronic effects but the electron accepting substituents stabilize the hydroxocomplexes. It follows from the whole set of results that Ktet can be much larger than Ktrig in the absence of the strain, but with a sufficiently acidic diol, and that the presence of the strain does not necessarily make Ktet larger than Ktrig for a less acidic diol with a purely saturated hydrocarbon backbone. Thus, the electronic effects manifested in the acidity of the diol appear to be more significant than the strain release effect in determining the Ktet/Ktrig ratio.
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Affiliation(s)
| | - Marcos Flores-Alamo
- Facultad de Química, Universidad Nacional Autónoma de México, 04510 México D.F., Mexico.
| | - Felipe Medrano
- Departamento de Ciencias químico-biológicas, Universidad de Sonora, Rosales y Luis Encinas Johnson s/n, Centro 83000, Hermosillo, Sonora, Mexico
| | - Anatoly K Yatsimirsky
- Facultad de Química, Universidad Nacional Autónoma de México, 04510 México D.F., Mexico.
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26
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Hernández-Ayala LF, Reina M, Flores-Alamo M, Ruiz-Azuara L. Pyridyl based mono and di-selenoethers: Synthesis, characterization and DFT study. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2019.127449] [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: 10/25/2022]
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27
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Cedillo-Gutiérrez EL, Hernández-Ayala LF, Torres-Gutiérrez C, Reina M, Flores-Alamo M, Carrero JC, Ugalde-Saldívar VM, Ruiz-Azuara L. Identification of descriptors for structure-activity relationship in ruthenium (II) mixed compounds with antiparasitic activity. Eur J Med Chem 2020; 189:112084. [DOI: 10.1016/j.ejmech.2020.112084] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 01/19/2020] [Accepted: 01/19/2020] [Indexed: 10/25/2022]
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28
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Lugo-González JC, Gómez-Tagle P, Flores-Alamo M, Yatsimirsky AK. Mechanistic study of carboxylic acid and phosphate ester cleavage by oximate metal complexes surpassing the limiting reactivity of highly basic free oximate anions. Dalton Trans 2020; 49:2452-2467. [PMID: 31994558 DOI: 10.1039/c9dt04733f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [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
Two tridentate and one tetradentate new ligands containing the terminal oxime group separated from secondary amino and pyridine groups as additional binding sites by two or three methylene groups have been prepared. Their acid-base properties, as well as the composition and stability of their complexes with Zn(ii) and Cd(ii) ions, were determined by potentiometric and spectrophotometric titrations. The X-ray structure of a Cd(ii) complex of a related tridentate oxime ligand previously studied in solution was determined. All oximate complexes show high reactivity in the cleavage of aryl acetates, paraoxon, parathion and 4-nitrophenyl diphenyl phosphate, with rate constants significantly surpassing the limiting rate constants observed for highly basic free oximate anions. The second-order rate constants for individual oximate complexes in solution are assigned to each ligand, metal cation and substrate. The results of the cleavage of 4-substituted phenyl acetates were analyzed in terms of Brønsted correlations with the leaving group pKa, which demonstrated a change in the rate determining step from the nucleophilic attack to the leaving group departure upon an increase in the leaving group basicity. The zero slope of the Brønsted correlation for the nucleophilic attack indicates transition state stabilization through electrophilic assistance by the metal ion. This interpretation is supported by metal selectivity in the relative efficiency of the cleavage of paraoxon and parathion. The existence of the alpha-effect in ester cleavage by coordinated oximates is confirmed by an analysis of the Brønsted correlations with the nucleophile basicity for metal bound oximate and alkoxo or hydroxo nucleophiles. The very high reactivity of the oximate complexes of the new ligands is attributed to transition state stabilization and to the removal of the solvational imbalance of oximate anions that impedes the expected increase in the reactivity of highly basic free anions.
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Affiliation(s)
| | - Paola Gómez-Tagle
- Universidad Nacional Autónoma de México, Facultad de Química, 04510, Mexico City, Mexico.
| | - Marcos Flores-Alamo
- Universidad Nacional Autónoma de México, Facultad de Química, 04510, Mexico City, Mexico.
| | - Anatoly K Yatsimirsky
- Universidad Nacional Autónoma de México, Facultad de Química, 04510, Mexico City, Mexico.
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Hernández-Ayala LF, Toledano-Magaña Y, Ortiz-Frade L, Flores-Alamo M, Galindo-Murillo R, Reina M, García-Ramos JC, Ruiz-Azuara L. Heteroleptic Ni II complexes: Synthesis, structural characterization, computational studies and amoebicidal activity evaluation. J Inorg Biochem 2020; 206:111043. [PMID: 32109662 DOI: 10.1016/j.jinorgbio.2020.111043] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2019] [Revised: 02/14/2020] [Accepted: 02/16/2020] [Indexed: 11/19/2022]
Abstract
In this work, we present the synthesis, characterization, electrochemical studies, DFT calculations, and in vitro amoebicidal effect of seven new heteroleptic NiII coordination compounds. The crystal structures of [H2(pdto)](NO3)2 and [Ni(pdto)(NO3)]PF6 are presented, pdto = 2,2'-[1,2-ethanediylbis-(sulfanediyl-2,1-ethanediyl)]dipyridine. The rest of the compounds have general formulae: [Ni(pdto)(NN)](PF6) where N-N = 2,2'-bipyridine (bpy), 4,4'-dimethyl-2,2'-bipyridine (44dmbpy), 5,5'-dimethyl-2,2'-bipyridine (55dmbpy), 1,10-phenanthroline (phen), 4,7-dimethyl-1,10-phenanthroline (47dmphen) and 5,6-dimethyl-1,10-phenanthroline (56dmphen). The size of NN ligand and its substituents modulate the compound electronic features and influence their antiproliferative efficiency against Entamoeba histolytica. 56dmphen derivative, shows the biggest molar volume and presents a powerful amoebicidal activity (IC50 = 1.2 μM), being seven times more effective than the first-line drug for human amoebiasis metronidazole. Also, increases the reactive oxygen species concentration within the trophozoites. This could be the trigger of the E. histolytica growth inhibition. The antiparasitic effect is described using NiII electron density, molar volume, estimated by DFT, as well as the experimental redox potential and diffusion coefficients. In general, amoebicidal efficiency is directly proportional to the increment of the molar volume and decreases when the redox potential becomes more positive.
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Affiliation(s)
- Luis Felipe Hernández-Ayala
- Departamento de Química Inorgánica y Nuclear, Facultad de Química, UNAM, Ciudad Universitaria, Ciudad de México, Mexico
| | - Yanis Toledano-Magaña
- Departamento de Química Inorgánica y Nuclear, Facultad de Química, UNAM, Ciudad Universitaria, Ciudad de México, Mexico
| | - Luis Ortiz-Frade
- Centro de Investigación y Desarrollo Tecnológico en Electroquímica, Sanfandila, Querétaro, Mexico
| | - Marcos Flores-Alamo
- Departamento de Química Inorgánica y Nuclear, Facultad de Química, UNAM, Ciudad Universitaria, Ciudad de México, Mexico
| | - Rodrigo Galindo-Murillo
- College of Pharmacy, L.S. Skaggs Pharmacy Institute, University of Utah, Salt Lake City, UT 84112, United States of America
| | - Miguel Reina
- Departamento de Química Inorgánica y Nuclear, Facultad de Química, UNAM, Ciudad Universitaria, Ciudad de México, Mexico
| | - Juan Carlos García-Ramos
- Departamento de Química Inorgánica y Nuclear, Facultad de Química, UNAM, Ciudad Universitaria, Ciudad de México, Mexico
| | - Lena Ruiz-Azuara
- Departamento de Química Inorgánica y Nuclear, Facultad de Química, UNAM, Ciudad Universitaria, Ciudad de México, Mexico.
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Aguilar CAH, Narayanan J, López JAB, Flores-Alamo M, Contreras EFV, Gastélum KAL, Alonzo FR, Cabrera CBP, Cuevas AJS. Enhanced photocatalytic degradation of 2-thiobenzimidazole by the tris(8-quinolinolato)cobalt( iii) complex through peroxide adduct formation: theoretical and experimental investigations. NEW J CHEM 2020. [DOI: 10.1039/c9nj04027g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
HOMO–LUMO influenced photocatalytic degradation of 2-thiobenzimidazole through a thermodynamically favored route has been achieved by the cobalt(iii) Schiff base complex.
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Affiliation(s)
- Carlos Alberto Huerta Aguilar
- División de Ingeniería en Nanotecnología
- Universidad Politécnica del Valle de México
- Av. Mexiquense s/n esquina Av. Universidad Politécnica
- Tultitlan
- Mexico
| | - Jayanthi Narayanan
- División de Ingeniería en Nanotecnología
- Universidad Politécnica del Valle de México
- Av. Mexiquense s/n esquina Av. Universidad Politécnica
- Tultitlan
- Mexico
| | | | - Marcos Flores-Alamo
- Facultad de Química
- Universidad Nacional Autónoma de México
- Ciudad Universitaria
- México D. F
- Mexico
| | | | | | - Fernando Rocha Alonzo
- Departamento de Investigación en Polímeros y Materiales
- Universidad de Sonora
- Hermosillo
- Mexico
| | - Cristian Brayan Palacios Cabrera
- División de Ingeniería en Nanotecnología
- Universidad Politécnica del Valle de México
- Av. Mexiquense s/n esquina Av. Universidad Politécnica
- Tultitlan
- Mexico
| | - Alan Javier Santiago Cuevas
- División de Ingeniería en Nanotecnología
- Universidad Politécnica del Valle de México
- Av. Mexiquense s/n esquina Av. Universidad Politécnica
- Tultitlan
- Mexico
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Salazar-Díaz JJ, Muñoz-Hernández MA, Rufino-Felipe E, Flores-Alamo M, Ramírez-Solís A, Montiel-Palma V. Bi- and tridentate stannylphosphines and their coordination to low-valent platinum. Dalton Trans 2019; 48:15896-15905. [PMID: 31552976 DOI: 10.1039/c9dt03317c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [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
Semirigid bifunctional tin-substituted o-tolylphosphines of general formulae [Ph2P(o-C6H4CH2)SnR3] (R = Ph, 1; R = Me, 2) and [{Ph2P(o-C6H4CH2)}2SnPh2] (3) were synthesized and isolated in good yields. The new compounds were fully characterized by single-crystal X-ray diffraction and multinuclear solution NMR spectroscopic techniques. The observed J(119Sn,31P) values in solution NMR spectroscopy as well as the PSn distances in the solid state and DFT calculations (B3LYP) on compounds 1 and 3 do not support the existence of intramolecular P → Sn bond interactions in either of the three compounds. 1 and 2 reacted with stoichiometric amounts of tristriphenylphosphine platinum(0) [Pt(PPh3)3] under toluene refluxing conditions leading to formation of Pt(ii) distorted square-planar complexes [Ph2P(o-C6H4CH2)Pt(SnR3)(PPh3)], (R = Ph, 4; R = Me, 5), each bearing a five-membered carbometallated ring resulting from Pt coordination to P and the benzylic C sp3 atom of the ligand architecture rather than from activation of the terminal Sn-C carbon bonds of the phenyl or methyl substituents which would have rendered six-membered rings. Additionally, the fragment SnR3 also binds to the metal centre disposing cis to the cyclometalated carbon atom and to the single remaining PPh3. This carbometallation takes place affecting the integrity of the ligand skeleton. NBO calculations show the Sn fragment coordinates to the metal as X-type stannyl, SnR3. The analogous reaction of [Pt(PPh3)3] towards the stannyldiphosphine 3 leads to the quantitative formation of complex [(Ph2P-o-C6H4CH2)Pt(Ph2P-o-C6H4CH2SnPh3)], 6, which exhibits five- and six-membered metallacycles at the expense of the ligand frame. All compounds were characterized exhaustively by solution spectroscopic measurements and by single crystal X-ray diffraction analysis. DFT computations corroborate the higher stability of the observed products over those resulting from preservation of the ligand backbone.
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Affiliation(s)
- J Jacobo Salazar-Díaz
- Centro de Investigaciones Químicas-IICBA, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Col. Chamilpa, Cuernavaca, Morelos 62209, Mexico.
| | - Miguel A Muñoz-Hernández
- Centro de Investigaciones Químicas-IICBA, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Col. Chamilpa, Cuernavaca, Morelos 62209, Mexico. and Department of Chemistry, Mississippi State University, Box 9573, Mississippi State, Mississippi 39762, USA
| | - Ernesto Rufino-Felipe
- Centro de Investigaciones Químicas-IICBA, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Col. Chamilpa, Cuernavaca, Morelos 62209, Mexico.
| | - Marcos Flores-Alamo
- Facultad de Química, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico
| | - Alejandro Ramírez-Solís
- Centro de Investigación en Ciencias-IICBA, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Col. Chamilpa, Cuernavaca, Morelos 62209, Mexico
| | - Virginia Montiel-Palma
- Centro de Investigaciones Químicas-IICBA, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Col. Chamilpa, Cuernavaca, Morelos 62209, Mexico. and Department of Chemistry, Mississippi State University, Box 9573, Mississippi State, Mississippi 39762, USA
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Mondragón-Díaz A, Robles-Marín E, Murueta-Cruz BA, Aquite JC, Martínez-Alanis PR, Flores-Alamo M, Aullón G, Benítez LN, Castillo I. Conformational Effects of [Ni 2 (μ-ArS) 2 ] Cores on Their Electrocatalytic Activity. Chem Asian J 2019; 14:3301-3312. [PMID: 31400087 DOI: 10.1002/asia.201901037] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [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: 07/29/2019] [Indexed: 11/11/2022]
Abstract
Two nickel complexes supported by tridentate NS2 ligands, [Ni2 (κ-N,S,S,S'-NPh {CH2 (MeC6 H2 R')S}2 )2 ] (1; R'=3,5-(CF3 )2 C6 H3 ) and [Ni2 (κ-N,S,S,S'-NiBu {CH2 C6 H4 S}2 )2 ] (2), were prepared as bioinspired models of the active site of [NiFe] hydrogenases. The solid-state structure of 1 reveals that the [Ni2 (μ-ArS)2 ] core is bent, with the planes of the nickel centers at a hinge angle of 81.3(5)°, whereas 2 shows a coplanar arrangement between both nickel(II) ions in the dimeric structure. Complex 1 electrocatalyzes proton reduction from CF3 COOH at -1.93 (overpotential of 1.04 V, with icat /ip ≈21.8) and -1.47 V (overpotential of 580 mV, with icat /ip ≈5.9) versus the ferrocene/ferrocenium redox couple. The electrochemical behavior of 1 relative to that of 2 may be related to the bent [Ni2 (μ-ArS)2 ] core, which allows proximity of the two Ni⋅⋅⋅Ni centers at 2.730(8) Å; thus possibly favoring H+ reduction. In contrast, the planar [Ni2 (μ-ArS)2 ] core of 2 results in a Ni⋅⋅⋅Ni distance of 3.364(4) Å and is unstable in the presence of acid.
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Affiliation(s)
- Alexander Mondragón-Díaz
- Departamento de Química, Facultad de Ciencias, Universidad del Valle, Ciudad Universitaria Meléndez, Calle 13, Cali, #100-00, Colombia
| | - Elvis Robles-Marín
- Instituto de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, Mexico, 04510, Mexico
| | - Brenda A Murueta-Cruz
- Departamento de Química, Facultad de Ciencias, Universidad del Valle, Ciudad Universitaria Meléndez, Calle 13, Cali, #100-00, Colombia
| | - Juan C Aquite
- Departamento de Química, Facultad de Ciencias, Universidad del Valle, Ciudad Universitaria Meléndez, Calle 13, Cali, #100-00, Colombia
| | - Paulina R Martínez-Alanis
- Departament de Química Inorgánica i Orgànica, Institut de Química Teòrica i Computacional, Universitat de Barcelona, Martí i Franquès 1-11, 08028, Barcelona, Spain
| | - Marcos Flores-Alamo
- Facultad de Química, División de Estudios de Posgrado, Universidad Nacional Autónoma de México, Ciudad Universitaria, Mexico, 04510, Mexico
| | - Gabriel Aullón
- Departament de Química Inorgánica i Orgànica, Institut de Química Teòrica i Computacional, Universitat de Barcelona, Martí i Franquès 1-11, 08028, Barcelona, Spain
| | - Luis Norberto Benítez
- Departamento de Química, Facultad de Ciencias, Universidad del Valle, Ciudad Universitaria Meléndez, Calle 13, Cali, #100-00, Colombia
| | - Ivan Castillo
- Instituto de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, Mexico, 04510, Mexico
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Sánchez-García JJ, Flores-Alamo M, Martínez-Falcón E, Klimova EI. 5-Chloro-2-ferrocenylbenzo[ d]oxazole. IUCr Data 2019. [DOI: 10.1107/s2414314619010964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
The asymmetric unit of the title compound, [Fe(C5H5)(C12H7ClNO)], consists of one ferrocenyl group bonded to chlorobenzo[d]oxazole. The conformation of the ferrocenyl moiety is slightly away from eclipsed. The bond angles between the 5-chloro-benzoxazole and ferrocenyl fragments are N—C—C = 127.4 (7)° and O—C—C = 116.8 (7)°. The benzo[d]oxazole ring is planar (r.m.s. deviation = 0.0042 Å) and makes an angle of 11.3 (4)° with the cyclopentadienyl ring attached to it. The crystal packing is characterized by intermolecular π–π contacts, resulting in chain formation along the b-axis direction. The centroid-to-centroid distance between the six- and five-membered rings is 3.650 (5) Å. Together with a C—H...π interaction, these intermolecular contacts form laminar arrays along the ac plane.
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Neira A, Martínez-Alanis PR, Aullón G, Flores-Alamo M, Zerón P, Company A, Chen J, Kasper JB, Browne WR, Nordlander E, Castillo I. Oxidative Cleavage of Cellobiose by Lytic Polysaccharide Monooxygenase (LPMO)-Inspired Copper Complexes. ACS Omega 2019; 4:10729-10740. [PMID: 31460171 PMCID: PMC6648734 DOI: 10.1021/acsomega.9b00785] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Accepted: 06/06/2019] [Indexed: 06/10/2023]
Abstract
The potentially tridentate ligand bis[(1-methyl-2-benzimidazolyl)ethyl]amine (2BB) was employed to prepare copper complexes [(2BB)CuI]OTf and [(2BB)CuII(H2O)2](OTf)2 as bioinspired models of lytic polysaccharide copper-dependent monooxygenase (LPMO) enzymes. Solid-state characterization of [(2BB)CuI]OTf revealed a Cu(I) center with a T-shaped coordination environment and metric parameters in the range of those observed in reduced LPMOs. Solution characterization of [(2BB)CuII(H2O)2](OTf)2 indicates that [(2BB)CuII(H2O)2]2+ is the main species from pH 4 to 7.5; above pH 7.5, the hydroxo-bridged species [{(2BB)CuII(H2O) x }2(μ-OH)2]2+ is also present, on the basis of cyclic voltammetry and mass spectrometry. These observations imply that deprotonation of the central amine of Cu(II)-coordinated 2BB is precluded, and by extension, amine deprotonation in the histidine brace of LPMOs appears unlikely at neutral pH. The complexes [(2BB)CuI]OTf and [(2BB)CuII(H2O)2](OTf)2 act as precursors for the oxidative degradation of cellobiose as a cellulose model substrate. Spectroscopic and reactivity studies indicate that a dicopper(II) side-on peroxide complex generated from [(2BB)CuI]OTf/O2 or [(2BB)CuII(H2O)2](OTf)2/H2O2/NEt3 oxidizes cellobiose both in acetonitrile and aqueous phosphate buffer solutions, as evidenced from product analysis by high-performance liquid chromatography-mass spectrometry. The mixture of [(2BB)CuII(H2O)2](OTf)2/H2O2/NEt3 results in more extensive cellobiose degradation. Likewise, the use of both [(2BB)CuI]OTf and [(2BB)CuII(H2O)2](OTf)2 with KO2 afforded cellobiose oxidation products. In all cases, a common Cu(II) complex formulated as [(2BB)CuII(OH)(H2O)]+ was detected by mass spectrometry as the final form of the complex.
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Affiliation(s)
- Andrea.
C. Neira
- Instituto
de Química and Facultad de Química, División
de Estudios de Posgrado, Universidad Nacional
Autónoma de México, Circuito Exterior, CU, 04510 Ciudad de
México, México
| | - Paulina R. Martínez-Alanis
- Departament
de Química Inorgànica i Orgànica and Institut
de Química Teòrica i Computacional, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain
| | - Gabriel Aullón
- Departament
de Química Inorgànica i Orgànica and Institut
de Química Teòrica i Computacional, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain
| | - Marcos Flores-Alamo
- Instituto
de Química and Facultad de Química, División
de Estudios de Posgrado, Universidad Nacional
Autónoma de México, Circuito Exterior, CU, 04510 Ciudad de
México, México
| | - Paulino Zerón
- Instituto
de Química and Facultad de Química, División
de Estudios de Posgrado, Universidad Nacional
Autónoma de México, Circuito Exterior, CU, 04510 Ciudad de
México, México
| | - Anna Company
- Institut
de Química Computacional i Catàlisi (IQCC), Departament
de Química, Universitat de Girona, C/ M. Aurèlia Capmany 69, 17003 Girona, Catalonia, Spain
| | - Juan Chen
- Molecular
Inorganic Chemistry, Stratingh Institute for Chemistry, Faculty of
Science and Health, University of Groningen, Nijenborgh 4, 9747AG Groningen, The Netherlands
| | - Johann B. Kasper
- Molecular
Inorganic Chemistry, Stratingh Institute for Chemistry, Faculty of
Science and Health, University of Groningen, Nijenborgh 4, 9747AG Groningen, The Netherlands
| | - Wesley R. Browne
- Molecular
Inorganic Chemistry, Stratingh Institute for Chemistry, Faculty of
Science and Health, University of Groningen, Nijenborgh 4, 9747AG Groningen, The Netherlands
| | - Ebbe Nordlander
- Chemical
Physics, Department of Chemistry, Lund University, Box 124, SE-221 00 Lund, Sweden
| | - Ivan Castillo
- Instituto
de Química and Facultad de Química, División
de Estudios de Posgrado, Universidad Nacional
Autónoma de México, Circuito Exterior, CU, 04510 Ciudad de
México, México
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Rufino-González Y, Ponce-Macotela M, García-Ramos JC, Martínez-Gordillo MN, Galindo-Murillo R, González-Maciel A, Reynoso-Robles R, Tovar-Tovar A, Flores-Alamo M, Toledano-Magaña Y, Ruiz-Azuara L. Antigiardiasic activity of Cu(II) coordination compounds: Redox imbalance and membrane damage after a short exposure time. J Inorg Biochem 2019; 195:83-90. [DOI: 10.1016/j.jinorgbio.2019.03.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Revised: 03/14/2019] [Accepted: 03/15/2019] [Indexed: 02/09/2023]
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Ordóñez-Hernández J, Arcos-Ramos R, García-Ortega H, Munguía-Viveros E, Romero-Ávila M, Flores-Alamo M, Gracia-Mora I, Sánchez-Bartéz F, Santillan R, Farfán N. Synthesis and structural analysis of bioactive Schiff-base pentacoordinated diorganotin(IV) complexes. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2018.11.107] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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Abstract
The title compound, [Fe2(C5H5)2(C13H8OS2)], crystallizes with two molecules in the asymmetric unit. Each molecule comprises a pair of ferrocenyl units bridged by a dithiol-3-one moiety. The dihedral angles between the dithiol-3-one ring and the substituted cyclopentadienyl rings are in the range 32.4 (3)–39.3 (3)°. One of the dithiol-3-one rings was refined as being disordered over two sets of sites while the same kind of disorder in the other molecule was negligible. The molecular packing is dominated by C—H...O hydrogen bonds and C—H...π interactions.
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Martínez-Aguirre MA, Flores-Alamo M, Yatsimirsky AK. Thermodynamic and structural study of complexation of phenylboronic acid with salicylhydroxamic acid and related ligands. Appl Organomet Chem 2018. [DOI: 10.1002/aoc.4405] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
| | - Marcos Flores-Alamo
- Facultad de Química; Universidad Nacional Autónoma de México; 04510 México D.F. Mexico
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Percástegui EG, Reyes-Mata C, Flores-Alamo M, Quiroz-García B, Rivera E, Castillo I. Transformations in Chemically Responsive Copper-Calixarene Architectures. Chem Asian J 2018; 13:520-527. [DOI: 10.1002/asia.201701741] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Revised: 01/08/2018] [Indexed: 01/24/2023]
Affiliation(s)
- Edmundo G. Percástegui
- Instituto de Química; Universidad Nacional Autónoma de México, UNAM; Circuito Exterior Ciudad Universitaria 04510 México
- Current address: Department of Chemistry; University of Cambridge; Lensfield Road Cambridge CB2 1EW UK
| | - Carlos Reyes-Mata
- Instituto de Química; Universidad Nacional Autónoma de México, UNAM; Circuito Exterior Ciudad Universitaria 04510 México
| | - Marcos Flores-Alamo
- Facultad de Química; Universidad Nacional Autónoma de México, UNAM; Circuito Exterior Ciudad Universitaria 04510 México
| | - Beatriz Quiroz-García
- Instituto de Química; Universidad Nacional Autónoma de México, UNAM; Circuito Exterior Ciudad Universitaria 04510 México
| | - Ernesto Rivera
- Instituto de Investigaciones en Materiales; Universidad Nacional Autónoma de México, UNAM; Circuito Exterior Ciudad Universitaria 04510 México
| | - Ivan Castillo
- Instituto de Química; Universidad Nacional Autónoma de México, UNAM; Circuito Exterior Ciudad Universitaria 04510 México
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Robles-Marín E, Mondragón A, Martínez-Alanis PR, Aullón G, Flores-Alamo M, Castillo I. Easily reduced bis-pincer ( NS2) 2molybdenum( iv) to ( NHS2) 2Mo( ii) by alcohols vs. redox-inert ( NS2)( NHS2)iron( iii) complexes. Dalton Trans 2018; 47:10932-10940. [DOI: 10.1039/c8dt01562g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Iron and molybdenum complexes supported by a pincer-type dianionic [NS2]2− donor were prepared to compare their structural, spectroscopic, and electrochemical properties.
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Affiliation(s)
- Elvis Robles-Marín
- Instituto de Química
- Universidad Nacional Autónoma de México
- Circuito Exterior
- CU
- México DF
| | | | - Paulina R. Martínez-Alanis
- Departament de Química Inorgànica i Orgànica and Institut de Química Teòrica i Computacional
- Universitat de Barcelona
- 08028 Barcelona
- Spain
| | - Gabriel Aullón
- Departament de Química Inorgànica i Orgànica and Institut de Química Teòrica i Computacional
- Universitat de Barcelona
- 08028 Barcelona
- Spain
| | - Marcos Flores-Alamo
- Facultad de Química
- División de Estudios de Posgrado
- Universidad Nacional Autónoma de México
- Ciudad Universitaria
- México DF
| | - Ivan Castillo
- Instituto de Química
- Universidad Nacional Autónoma de México
- Circuito Exterior
- CU
- México DF
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41
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Robles-Marín E, Mondragón A, Flores-Alamo M, Castillo I. Silver Complex of an N-Heterocyclic Carbene Ligand with Bulky Thiocarbamate Groups. J BRAZIL CHEM SOC 2018. [DOI: 10.21577/0103-5053.20180051] [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: 11/04/2022] Open
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42
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Garduño JA, Arévalo A, Flores-Alamo M, García JJ. Mn(i) organometallics containing the iPr2P(CH2)2PiPr2 ligand for the catalytic hydration of aromatic nitriles. Catal Sci Technol 2018. [DOI: 10.1039/c8cy00416a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [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
The first example of a homogeneous hydration of aromatic nitriles catalyzed by manganese molecular compounds is reported.
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Affiliation(s)
- Jorge A. Garduño
- Facultad de Química
- Universidad Nacional Autónoma de México
- Mexico City
- Mexico
| | - Alma Arévalo
- Facultad de Química
- Universidad Nacional Autónoma de México
- Mexico City
- Mexico
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43
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Manzanera-Estrada ME, Cruz-Ramírez M, Flores-Alamo M, Gracia y Jiménez JM, Galindo-Murillo R, García-Ramos JC, Ruiz-Azuara L, Ortiz-Frade L. Effect of tunable redox behavior of bis chelate substituted 1,10-phenantroline Cu(II) complexes on its reaction with superoxide anion in DMSO. Toward a simple criterion to identify a SOD-like mechanism. J Inorg Biochem 2017; 175:118-128. [DOI: 10.1016/j.jinorgbio.2017.07.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Revised: 07/10/2017] [Accepted: 07/13/2017] [Indexed: 10/19/2022]
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44
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Abstract
In the title compound, [Ru2(C5H5)2(C13H8O)], the Ru—C bond lengths in the two ruthenocenyl moieties are in the range of 2.155 (4)–2.196 (3) Å. Both cyclopentadienyl (Cp) rings are planar and parallel with staggered (18.6 °) and eclipsed (3.1°) conformations between the mutual orientations of rings in the independent sandwiches of each ruthenocenyl molecule. In the crystal, there are intermolecular C—H...O hydrogen bonds between Cp carbon donor atoms and the cyclopropenone O atom of adjacent molecules, formingR22(14) andR66(38) motifs along thebandcaxes.
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45
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46
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Toledano-Magaña Y, García-Ramos JC, Torres-Gutiérrez C, Vázquez-Gasser C, Esquivel-Sánchez JM, Flores-Alamo M, Ortiz-Frade L, Galindo-Murillo R, Nequiz M, Gudiño-Zayas M, Laclette JP, Carrero JC, Ruiz-Azuara L. Water-Soluble Ruthenium (II) Chiral Heteroleptic Complexes with Amoebicidal in Vitro and in Vivo Activity. J Med Chem 2017; 60:899-912. [PMID: 28075589 DOI: 10.1021/acs.jmedchem.6b00795] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Three water-soluble Ru(II) chiral heteroleptic coordination compounds [Ru(en)(pdto)]Cl2 (1), [Ru(gly)(pdto)]Cl (2), and [Ru(acac)(pdto)]Cl (3), where pdto = 2,2'-[1,2-ethanediylbis-(sulfanediyl-2,1-ethanediyl)]dipyridine, en = ethylendiamine, gly = glycinate, and acac = acetylacetonate, have been synthezised and fully characterized. The crystal structures of compounds 1-3 are described. The IC50 values for compounds 1-3 are within nanomolar range (14, 12, and 6 nM, respectively). The cytotoxicity for human peripheral blood lymphocytes is extremely low (>100 μM). Selectivity indexes for Ru(II) compounds are in the range 700-1300. Trophozoites exposed to Ru(II) compounds die through an apoptotic pathway triggered by ROS production. The orally administration to infected mice induces a total elimination of the parasite charge in mice faeces 1-2-fold faster than metronidazole. Besides, all compounds inhibit the trophozoite proliferation in amoebic liver abscess induced in hamster. All our results lead us to propose these compounds as promising candidates as antiparasitic agents.
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Affiliation(s)
- Yanis Toledano-Magaña
- Departamento de Química Inorgánica y Nuclear, Facultad de Química, Universidad Nacional Autónoma de México , Avenida Universidad 3000, 04510, Mexico City, Mexico
| | - Juan C García-Ramos
- Departamento de Química Inorgánica y Nuclear, Facultad de Química, Universidad Nacional Autónoma de México , Avenida Universidad 3000, 04510, Mexico City, Mexico.,Departamento de Fisicoquímica, Instituto de Química, Universidad Nacional Autónoma de México , Avenida Universidad 3000, 04510, Mexico City, Mexico
| | - Carolina Torres-Gutiérrez
- Departamento de Química Inorgánica y Nuclear, Facultad de Química, Universidad Nacional Autónoma de México , Avenida Universidad 3000, 04510, Mexico City, Mexico
| | - Cristina Vázquez-Gasser
- Departamento de Química Inorgánica y Nuclear, Facultad de Química, Universidad Nacional Autónoma de México , Avenida Universidad 3000, 04510, Mexico City, Mexico
| | - José M Esquivel-Sánchez
- Departamento de Inmunología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México , Avenida Universidad 3000, 04510, Mexico City, Mexico
| | - Marcos Flores-Alamo
- Departamento de Química Inorgánica y Nuclear, Facultad de Química, Universidad Nacional Autónoma de México , Avenida Universidad 3000, 04510, Mexico City, Mexico
| | - Luis Ortiz-Frade
- Departamento de Electroquímica, Centro de Investigación y Desarrollo Tecnológico en Electroquímica SC , Parque Tecnológico Querétaro Sanfandila, Pedro de Escobedo, CP 76703 Querétaro México
| | - Rodrigo Galindo-Murillo
- Department of Medicinal Chemistry, College of Pharmacy, University of Utah , Skaggs Hall 201, Salt Lake City, Utah 84112, United States
| | - Mario Nequiz
- Departamento de Medicina Experimental, Facultad de Medicina, Universidad Nacional Autónoma de México , Dr. Balmis 148, Col. Doctores, 06726, Mexico City, Mexico
| | - Marco Gudiño-Zayas
- Departamento de Medicina Experimental, Facultad de Medicina, Universidad Nacional Autónoma de México , Dr. Balmis 148, Col. Doctores, 06726, Mexico City, Mexico
| | - Juan P Laclette
- Departamento de Inmunología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México , Avenida Universidad 3000, 04510, Mexico City, Mexico
| | - Julio C Carrero
- Departamento de Inmunología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México , Avenida Universidad 3000, 04510, Mexico City, Mexico
| | - Lena Ruiz-Azuara
- Departamento de Química Inorgánica y Nuclear, Facultad de Química, Universidad Nacional Autónoma de México , Avenida Universidad 3000, 04510, Mexico City, Mexico
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47
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Corona-González MV, Zamora-Moreno J, Cuevas-Chávez CA, Rufino-Felipe E, Mothes-Martin E, Coppel Y, Muñoz-Hernández MA, Vendier L, Flores-Alamo M, Grellier M, Sabo-Etienne S, Montiel-Palma V. A family of rhodium and iridium complexes with semirigid benzylsilyl phosphines: from bidentate to tetradentate coordination modes. Dalton Trans 2017; 46:8827-8838. [DOI: 10.1039/c7dt00727b] [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: 11/21/2022]
Abstract
Rh and Ir coordination of phosphines with 1 to 3 Si–H groups.
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48
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García-Ramos JC, Gutiérrez AG, Vázquez-Aguirre A, Toledano-Magaña Y, Alonso-Sáenz AL, Gómez-Vidales V, Flores-Alamo M, Mejía C, Ruiz-Azuara L. The mitochondrial apoptotic pathway is induced by Cu(II) antineoplastic compounds (Casiopeínas ®) in SK-N-SH neuroblastoma cells after short exposure times. Biometals 2016; 30:43-58. [PMID: 27988860 DOI: 10.1007/s10534-016-9983-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [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: 10/31/2016] [Accepted: 12/04/2016] [Indexed: 12/20/2022]
Abstract
The family of Copper(II) coordination compounds Casiopeínas® (Cas) has shown antiproliferative activity in several tumour lines by oxidative cellular damage and mitochondrial dysfunction that lead to cell death through apoptotic pathways. The goal of this work is looking for the functional mechanism of CasIIgly, CasIIIia and CasIIIEa in neuroblastoma metastatic cell line SK-N-SH, a paediatric extra-cranial tumour which is refractory to several anti-carcinogenic agents. All Cas have shown higher antiproliferative activity than cisplatin (IC50 = 123 μM) with IC50 values of 18, 22 and 63 µM for CasIIgly, CasIIIEa and CasIIIia, respectively. At low concentrations and early times (4 h), these compounds cause a disruption of the mitochondrial transmembrane potential (Δψm). Concomitantly, an important depletion of intracellular glutathione and an increase of reactive oxygen species (ROS) hydrogen peroxide and radical superoxide were observed. On the other side, the lower cytotoxic effect of Casiopeínas on cultures of human peripheral blood lymphocytes (IC50CasIIgly = 1720 µM, IC50 CasIIIEa = 3860 µM and IC50 CasIIIia = 4700 µM) show the selectivity of these compounds over the tumour cells compared with the non-transformed cells. Chemically, glutathione (GSH) interacts with Casiopeínas® through the coordination of sulphur atom to the metal centre, process which facilitates the electron transfer to get Cu(I), GSSG and the posterior production of ROS. Additionally, the molecular structure of CasIIIia as nitrate is reported. These results have shown that the anticarcinogenic activity of Casiopeínas® on neuroblastoma SK-N-SH is through mitochondrial apoptosis due to the enhanced pro-oxidant environment promoted by the presence of the coordination copper compounds.
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Affiliation(s)
- Juan Carlos García-Ramos
- Laboratorio de Química Inorgánica Medicinal, Facultad de Química, Universidad Nacional Autónoma de México, Av. Universidad 3000, Z.P. 04510, Mexico City, Mexico.,Instituto de Química, Universidad Nacional Autónoma de México, Av. Universidad 3000, Z.P. 04510, Mexico City, Mexico
| | | | - Adriana Vázquez-Aguirre
- Facultad de Ciencias Naturales, Universidad Autónoma de Querétaro, Avenida de las Ciencias S/N Juriquilla, Delegación Santa Rosa Jáuregui, C.P. 76230, Querétaro, Mexico
| | - Yanis Toledano-Magaña
- Laboratorio de Química Inorgánica Medicinal, Facultad de Química, Universidad Nacional Autónoma de México, Av. Universidad 3000, Z.P. 04510, Mexico City, Mexico
| | - Ana Luisa Alonso-Sáenz
- Laboratorio de Química Inorgánica Medicinal, Facultad de Química, Universidad Nacional Autónoma de México, Av. Universidad 3000, Z.P. 04510, Mexico City, Mexico
| | - Virginia Gómez-Vidales
- Instituto de Química, Universidad Nacional Autónoma de México, Av. Universidad 3000, Z.P. 04510, Mexico City, Mexico
| | - Marcos Flores-Alamo
- Laboratorio de Química Inorgánica Medicinal, Facultad de Química, Universidad Nacional Autónoma de México, Av. Universidad 3000, Z.P. 04510, Mexico City, Mexico
| | - Carmen Mejía
- Facultad de Ciencias Naturales, Universidad Autónoma de Querétaro, Avenida de las Ciencias S/N Juriquilla, Delegación Santa Rosa Jáuregui, C.P. 76230, Querétaro, Mexico.
| | - Lena Ruiz-Azuara
- Laboratorio de Química Inorgánica Medicinal, Facultad de Química, Universidad Nacional Autónoma de México, Av. Universidad 3000, Z.P. 04510, Mexico City, Mexico.
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49
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Sánchez García JJ, Flores-Alamo M, Martínez Klimov ME, Klimova EI. N-alkyl-2-(1,2-diferrocenylvinyl)-4,5-dihydrooxazolinium salts, multi-component synthesis and breaking of their heterocyclic systems. PURE APPL CHEM 2016. [DOI: 10.1515/pac-2016-0812] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractA new multicomponent method for the synthesis of N-alkyl-2-(Z-1,2-diferrocenylvinyl)-4,5-dihydrooxazolinium salts 3a–f, 5-(N-alkyl-2′,3′-diferrocenyl-acryloylamido)-3-aza-3-alkylpentanols 4a–d, (E)-N-alkyl-N-(2-morpholinoethyl)-2,3-diferrocenylacrylamides 9a,b,e,f and (E)-N-alkyl-N-(2-piperidinoethyl)-2,3-diferrocenylacrylamides 10a,c from reactions of 2,3-diferrocenylcyclopropenone 1 with bis-1,4-N,O-nucleophiles in the presence of triethyloxonium tetrafluoroborate, alkyl iodides, morpholine, piperidine and Et3N is described. The characterization of the new compounds was done by IR, 1H- and 13C-NMR spectroscopy, mass-spectrometry, elemental analysis and X-ray diffraction studies.
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Affiliation(s)
- Jessica J. Sánchez García
- 1Facultad de Química, Universidad Nacional Autónoma de México, UNAM, México D. F., C.P. 04500, México
| | - Marcos Flores-Alamo
- 1Facultad de Química, Universidad Nacional Autónoma de México, UNAM, México D. F., C.P. 04500, México
| | - Mark E. Martínez Klimov
- 1Facultad de Química, Universidad Nacional Autónoma de México, UNAM, México D. F., C.P. 04500, México
| | - Elena I. Klimova
- 1Facultad de Química, Universidad Nacional Autónoma de México, UNAM, México D. F., C.P. 04500, México
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50
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Sánchez García JJ, Toledano-Magaña Y, Flores-Alamo M, Martínez-Klimova E, Galindo-Murillo R, Hernández-Ayala LF, Ortiz-Frade L, García-Ramos JC, Klimova EI. Polycyclic ferrocenyl(dihydro)thiazepine derivatives: Diastereo-selective synthesis, characterization, electrochemical behavior, theoretical and biological investigation. J Inorg Biochem 2016; 166:141-149. [PMID: 27863300 DOI: 10.1016/j.jinorgbio.2016.09.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Revised: 08/27/2016] [Accepted: 09/13/2016] [Indexed: 11/19/2022]
Abstract
The reaction of E-2-ferrocenylmethylidenetetralones and E,E-2,6-bis-(ferrocenylmethylidene)-cyclohexanone with 2-aminothiophenol proceed with high diastereoselectivity, forming the ~4.5:1 mixture of trans- and cis-isomers of polycyclic ferrocenylthiazepines, respectively. The reactions of E,E-2,5-bis-(ferrocenylmethylidene)cyclopentanone and E,E-3,5-bis-(ferrocenylmethylidene)-1-methyl-4-piperidone with 2-aminothiophenol take place stereo specifically to form the diastereomeric tricyclic thiazepines of cis- and trans-configuration, respectively. The structures of the obtained compounds were established by IR, 1H and 13C NMR spectroscopy and mass-spectrometry. The structures of the trans-tetralino[1,2a]-, trans-5,7-dimethyltetralino[1,2a]-2-ferrocenyl [1,5]benzo-2,3-dihydrothiazepines and cis-5-ferrocenyl-methylidenecyclopentano[1,2a]-2-ferrocenyl- [1,5]benzo-2,3-dihydrothiazepine were confirmed by X-ray diffraction analysis. An electrochemical study reveals that the diferrocenyl derivatives belong to a Class I compounds of the Robin-Day classification. This behavior is explained by the analysis of frontier orbitals as calculated by density functional theory, showing that only one ferrocenyl unit participates in the generation of HOMO and LUMO orbitals. Compounds 4a and 4c showed similar capacity to inhibit the proliferation of HM1: IMSS trophozoite cultures than the first choice drug for human amoebiasis treatment, metronidazole. Morphological changes induced in the trophozoites after drug exposure suggest a redox in balance as the probable mechanism of the parasite death.
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Affiliation(s)
| | | | - Marcos Flores-Alamo
- Facultad de Química, Universidad Nacional Autónoma de México, CD.MX, 04510, Mexico
| | | | | | | | - Luis Ortiz-Frade
- Departamento de Electroquímica, Centro de Investigación y Desarrollo Tecnológico en Electroquímica, S.C., Querétaro, 76703, Mexico
| | - Juan C García-Ramos
- Departamento de Fisicoquímica, Instituto de Química, Universidad Nacional Autónoma de México, CD. MX, 04510, Mexico.
| | - Elena I Klimova
- Facultad de Química, Universidad Nacional Autónoma de México, CD.MX, 04510, Mexico.
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