Ivï¿ ⁄ n Delgado‐Enciso, Violeta M. Madrigal-Pérez, Agustín Lara‐Esqueda, Martha Diaz-Sanchez, José Guzmán-Esquivel, Luis Rosas-Vizcaino, Oscar Virgen-Jimenez, Juleny Kleiman-Trujillo, Maria Lagarda-Canales, Gabriel Ceja-Espíritu, Viridiana Rangel-Salgado, Uriel A. López-Lemus, Josuel Delgado‐Enciso, Agustin ï¿ ⁄ Lara-Basulto, Alejandro Soriano Hernï¿ ⁄ ndez,
Potassium permanganate has been reported to be an effective treatment for certain types of wounds. The aim of the present study was to evaluate the use of potassium permanganate in the treatment of diabetic foot ulcers. A single-blind, randomized, controlled clinical trial was conducted on patients with type 2 diabetes mellitus that presented with a foot ulcer persisting for >3 months. The control group (n=10) was treated with the current standard treatment, which comprises of measures for reducing ...
Tópico(s): Pressure Ulcer Prevention and Management
2018 - Spandidos Publishing | Biomedical Reports
Martı́n Rosas, Fause Attié, Gustavo Pastelı́n, Agustín Lara, Oscar Velazquez, Roberto Tapia‐Conyer, Jesús Martínez-Réding, Arturo J. Méndez, Antonio Lorenzo-Negrete, Jaime Herrera-Acosta,
Martin Rosas, Fause Attie, Gustavo Pastelin, Agustin Lara, Oscar Velazquez, Roberto Tapia-conyer, Jesus Martinez-reding, Arturo mendez, Antonio Lorenzo-negrete, and Jaime Herrera-acosta: Prevalence of proteinuria in Mexico: ...
Tópico(s): Blood Pressure and Hypertension Studies
2005 - Elsevier BV | Kidney International
Rafael Violante-Ortíz, Blanca E. Del‐Rio‐Navarro, Agustín Lara‐Esqueda, Pedro Pérez, Guillermo Fanghänel, Agustín Madero, Arturo Berber,
Tópico(s): Obesity, Physical Activity, Diet
2005 - Adis, Springer Healthcare | Advances in Therapy
José A. Castro‐Osma, Carlos Alonso‐Moreno, Agustín Lara‐Sánchez, Antonío Otero, Juan Fernández‐Baeza, Luis F. Sánchez‐Barba, Ana M. Rodrı́guez,
A series of alkyl organoaluminium complexes based on bulky heteroscorpionate ligands were designed as catalysts for the ring-opening polymerisation of cyclic esters. Thus, the treatment of AlX3 (X = Me, Et) with bulky acetamide or thioacetamide heteroscorpionate ligands nbptamH (1) [nbptamH = N-naphthyl-2,2-bis(3,5-dimethylpyrazol-1-yl)thioacetamide], fbpamH (2) [fbpamH = N-fluorenyl-2,2-bis(3,5-dimethylpyrazol-1-yl)acetamide], ptbptamH (3) [ptbptamH = N-phenyl-2,2-bis(3,5-di-tert-butylpyrazol-1-yl)thioacetamide], ...
Tópico(s): Organometallic Complex Synthesis and Catalysis
2014 - Royal Society of Chemistry | Dalton Transactions
Manuel Honrado, Antonío Otero, Juan Fernández‐Baeza, Luis F. Sánchez‐Barba, Andrés Garcés, Agustín Lara‐Sánchez, Ana M. Rodrı́guez,
The reaction of bpzbeH, bpzteH (racemic mixture) or (R,R)-bpzmmH (enantiopure) with the amide complexes Zn{N(SiMe3)2}2 or Zn{N(SiHMe2)2}2 in 1 : 1 molar ratio in toluene afforded the mononuclear amide zinc complexes [Zn(NR2)(κ(3)-NNO)] (1-6) [κ(3)-NNO = bpzbe, R = SiMe3 1, SiHMe2 2; bpzte, R = SiMe3 3, SiHMe2 4; (R,R)-bpzmm, SiMe3 5, SiHMe2 6]. These complexes were employed in a protonolysis reaction with HCl-Et2O in 2 : 1 molar ratio to yield the dinuclear amide/chloride zinc complexes [Zn(κ(2)-NN-μ-O)2{ZnCl(NR2)}] ( ...
Tópico(s): biodegradable polymer synthesis and properties
2014 - Royal Society of Chemistry | Dalton Transactions
José A. Castro‐Osma, Carlos Alonso‐Moreno, Joaquín C. Garcı́a-Martı́nez, Juan Fernández‐Baeza, Luis F. Sánchez‐Barba, Agustín Lara‐Sánchez, Antonío Otero,
Macromolecular engineering of cyclic polycaprolactones has been carried out by a ring-expansion procedure catalyzed by a series of alkyl-organoaluminum initiators. The single-site nature of the initiators allows a very well-controlled macrolactonization process to give moderate to high molecular weight cyclic polymers with narrow polydispersities. Cyclic architectures are supported by a combination of techniques such as viscosity measurements, NMR, and MALDI-TOF MS analysis.
Tópico(s): Carbon dioxide utilization in catalysis
2013 - American Chemical Society | Macromolecules
José A. Castro‐Osma, Carlos Alonso‐Moreno, Agustín Lara‐Sánchez, Javier Martı́nez, Michael North, Antonío Otero,
A trimetallic aluminium complex catalyses the synthesis of cyclic carbonates from epoxides and CO 2 at room temperature and pressure.
Tópico(s): Organometallic Complex Synthesis and Catalysis
2013 - Royal Society of Chemistry | Catalysis Science & Technology
Andrés Garcés, Luis F. Sánchez‐Barba, Juan Fernández‐Baeza, Antonío Otero, Manuel Honrado, Agustín Lara‐Sánchez, Ana M. Rodrı́guez,
The previously described reaction of the low sterically hindered heteroscorpionate lithium acetamidinates [Li(κ3-pbpamd)(THF)] and [Li(κ3-tbpamd)(THF)] with a series of commercially available Grignard reagents RMgCl in an equimolecular ratio yielded the magnesium monoalkyls [Mg(R)(κ3-NNN)] (NNN = pbpamd, R = CH2SiMe3, Et (1), Bn (2); NNN = tbpamd, R = CH2SiMe3, Et (3), Bn (4)). However, subsequent reaction of these monoalkyls [Mg(R)(κ3-NNN)] with two additional equivalents of the same RMgCl in tetrahydrofuran gave ...
Tópico(s): Organometallic Complex Synthesis and Catalysis
2013 - American Chemical Society | Inorganic Chemistry
Antonío Otero, Juan Fernández‐Baeza, Agustín Lara‐Sánchez, Luis F. Sánchez‐Barba,
This review covers studies related to the design of ligands, synthetic pathways and catalytic processes of some families of metal complexes that contain heteroscorpionate ligands based on bis(pyrazol-1-yl)methane moieties.
Tópico(s): Chemical Synthesis and Reactions
2013 - Elsevier BV | Coordination Chemistry Reviews
Manuel Honrado, Antonío Otero, Juan Fernández‐Baeza, Luis F. Sánchez‐Barba, Agustín Lara‐Sánchez, Juan Tejeda, María Dolores Pérez‐Carrión, Jaime Martı́nez-Ferrer, Andrés Garcés, Ana M. Rodrı́guez,
The work described here represents the first example of an enantiopure hybrid scorpionate/cyclopentadiene ligand. The ligand was obtained in a one-pot synthetic procedure by an efficient and highly diastereoselective nucleophilic addition of an organolithium reagent to an electrophilically activated olefin in a new fulvene with a chiral substrate to control the stereochemistry of a newly created asymmetric center. We verified the potential utility of this ligand as a valuable scaffold that is able ...
Tópico(s): Coordination Chemistry and Organometallics
2013 - American Chemical Society | Organometallics
José A. Castro‐Osma, Carlos Alonso‐Moreno, Isabel Márquez‐Segovia, Antonío Otero, Agustín Lara‐Sánchez, Juan Fernández‐Baeza, Ana M. Rodrı́guez, Luis F. Sánchez‐Barba, Joaquín C. Garcı́a-Martı́nez,
Five-coordinate alkyl aluminium complexes [AlR(κ2-pbpam)2] (R = Me 1, Et 2), [AlR(κ2-sbpam)2] (R = Me 3, Et 4) and [AlR{κ2-(S)-mbpam}2] (R = Me 5, Et 6), –pbpam [pbpam = N-phenyl-2,2-bis(3,5-dimethylpyrazol-1-yl)acetamidate], sbpam [sbpam = N-sec-butyl-2,2-bis(3,5-dimethylpyrazol-1-yl)acetamidate] and (S)-mbpam [(S)-mbpam = (S)-(−)-N-α-methylbenzyl-2,2-bis(3,5-dimethylpyrazol-1-yl)acetamidate] were obtained by an alkane elimination route involving the reaction of the previously reported acetamide heteroscorpionate precursors ...
Tópico(s): Organometallic Complex Synthesis and Catalysis
2013 - Royal Society of Chemistry | Dalton Transactions
Juan Eugenio Hernández-Ávila, Lina Sofía Palacio-Mejía, Agustín Lara‐Esqueda, Eva Silvestre, Marcela Agudelo‐Botero, Mark L. Diana, David R. Hotchkiss, Beatríz Plaza, Alicia Sanchez Parbul,
The findings of a case study assessing the design and implementation of an electronic health record (EHR) in the public health system of Colima, Mexico, its perceived benefits and limitations, and recommendations for improving the implementation process are presented. In-depth interviews and focus group discussions were used to examine the experience of the actors and stakeholders participating in the design and implementation of EHRs. Results indicate that the main driving force behind the use of ...
Tópico(s): Biomedical Text Mining and Ontologies
2012 - Oxford University Press | Journal of the American Medical Informatics Association
Antonío Otero, Agustín Lara‐Sánchez, Carmén Nájera, Juan Fernández‐Baeza, Isabel Márquez‐Segovia, José A. Castro‐Osma, Javier Martı́nez, Luis F. Sánchez‐Barba, Ana M. Rodrı́guez,
The reactions of the hybrid scorpionate/cyclopentadiene compounds, as a mixture of regioisomers—1-[2,2-bis(3,5-dimethylpyrazol-1-yl)-1,1-diphenylethyl]-1,3-cyclopentadiene and 2-[2,2-bis(3,5-dimethylpyrazol-1-yl)-1,1-diphenylethyl]-1,3-cyclopentadiene (bpzcpH) and 1-[2,2-bis(3,5-dimethylpyrazol-1-yl)-1-tert-butylethyl]-1,3-cyclopentadiene and 2-[2,2-bis(3,5-dimethylpyrazol-1-yl)-1-tert-butylethyl]-1,3-cyclopentadiene (bpztcpH)—with [Lu(CH2SiMe3)3(thf)2] proceed in very high yields to give the free ...
Tópico(s): Synthesis and characterization of novel inorganic/organometallic compounds
2012 - American Chemical Society | Organometallics
Antonío Otero, Juan Fernández‐Baeza, Agustín Lara‐Sánchez, Carlos Alonso‐Moreno, Isabel Márquez‐Segovia, Luis F. Sánchez‐Barba, Ana M. Rodrı́guez,
Abstract Mit erhobenem Stachel : Ein enantiomerenreiner Neodymkomplex (siehe Schema) wirkt als effizienter Initiator für eine kontrollierte Ringöffnungspolymerisation von rac ‐Lactid zu einem isotaktischen Polyester. Der Heteroskorpionatkomplex wurde spektroskopisch und durch eine Röntgenstrukturanalyse charakterisiert. magnified image
Tópico(s): Organometallic Complex Synthesis and Catalysis
2009 - Wiley | Angewandte Chemie
Antonío Otero, Agustín Lara‐Sánchez, Juan Fernández‐Baeza, E. Martinez-Caballero, Isabel Márquez‐Segovia, Carlos Alonso‐Moreno, Luis F. Sánchez‐Barba, Ana M. Rodrı́guez, I. López-Solera,
The reaction of bis(3,5-dimethylpyrazol-1-yl)methane (bdmpzm) with Bu(n)Li and alkyl- or aryl-containing isocyanates or isothiocyanates, some of which were chiral reagents, and subsequent treatment with saturated aqueous ammonium chloride or HCl in diethyl ether gave (i) new heteroscorpionate ligands in the form of the acetamide or thioacetamide compounds [pbpamH (1), tbpamH (2), sbpamH (3) as racemic mixtures, (S)-mbpamH (4) as an enantiopure compound, pbptamH (5) and tbptamH (6)] and (ii) stabilization of ...
Tópico(s): Organometallic Complex Synthesis and Catalysis
2009 - Royal Society of Chemistry | Dalton Transactions
Luis F. Sánchez‐Barba, Carlos Alonso‐Moreno, Andrés Garcés, Mariano Fajardo, Juan Fernández‐Baeza, Antonío Otero, Agustín Lara‐Sánchez, Ana M. Rodrı́guez, I. López-Solera,
The reaction of the heteroscorpionate lithium salts [Li(pbpamd)(THF)] [pbpamd = N,N'-diisopropylbis(3,5-dimethylpyrazol-1-yl)acetamidinate] and [Li(tbpamd)(THF)] [tbpamd = N-ethyl-N'-tert-butylbis(3,5-dimethylpyrazol-1-yl)acetamidinate] with 1 equivalent of ZnCl2 in THF affords very high yields of the neutral heteroscorpionate chloride zinc complexes [ZnCl(NNN)] (NNN = pbpamd 1 and tbpamd 2). Compound 1 was used as a convenient starting material for the synthesis of aromatic amide zinc compounds [Zn(NHAr)(pbpamd)], ...
Tópico(s): Organometallic Complex Synthesis and Catalysis
2009 - Royal Society of Chemistry | Dalton Transactions
Antonío Otero, Juan Fernández‐Baeza, Agustín Lara‐Sánchez, Carlos Alonso‐Moreno, Isabel Márquez‐Segovia, Luis F. Sánchez‐Barba, Ana M. Rodrı́guez,
With a sting in its tail: An enantiopure neodymium complex (see scheme) acts as an efficient single-site initiator for the controlled ring-opening polymerization of rac-lactide, forming isotactic polyester. The heteroscorpionate complex was characterized spectroscopically and by X-ray diffraction.
Tópico(s): Organometallic Complex Synthesis and Catalysis
2009 - Wiley | Angewandte Chemie International Edition
Antonío Otero, Juan Fernández‐Baeza, Juan Tejeda, Agustín Lara‐Sánchez, Margarita Sánchez‐Molina, Sonia Franco, I. López-Solera, Ana M. Rodrı́guez, Luis F. Sánchez‐Barba, Sonia Morante‐Zarcero, Andrés Garcés,
The preparation of new chiral bis(pyrazol-1-yl)methane-based NNO-donor scorpionate ligands in the form of the lithium derivatives [Li(bpzb)(THF)] [1; bpzb = 1,1-bis(3,5-dimethylpyrazol-1-yl)-3,3-dimethyl-2-butoxide] and [Li(bpzte)(THF)] [2; bpzte = 2,2-bis(3,5-dimethylpyrazol-1-yl)-1-p-tolylethoxide] or the alcohol ligands (bpzbH) (3) and (bpzteH) (4) has been carried out by 1,2-addition reactions with trimethylacetaldehyde or p-tolualdehyde. The separation of a racemic mixture of the alcohol ligand 3 has been ...
Tópico(s): Organometallic Compounds Synthesis and Characterization
2009 - American Chemical Society | Inorganic Chemistry
Mayreli Ortiz, Mabel Torréns, José L. Mola, Pedro J. Ortiz, Alex Fragoso, A. Díaz, Rong Cao, Pilar Prados, Javier de Mendoza, Antonío Otero, Antonío Antiñolo, Agustín Lara‐Sánchez,
Two fluorescent ligands, 3,5-dimethyl-4-(6′-sulfonylammonium-1′-azonaphthyl)pyrazole (dmpzn, 1) and 3,5-dimethyl-4-(4′-N,N′-dimethylaminoazophenyl)pyrazole (dmpza, 2) were obtained by condensation of ketoenolic derivatives with hydrazine. 1 and 2 formed the novel dinuclear complexes [(H2O)3ClRu(μ-L)2RuCl(H2O)3] (3 or 4) and [(H2O)(NO)Cl2Ru(μ-L)2RuCl2(NO)(H2O)] (6 or 7) (where L = 1 or 2, respectively) which were characterized by IR, NMR and elemental analysis. The nitrosyl complexes were prepared by bubbling ...
Tópico(s): Radical Photochemical Reactions
2008 - Royal Society of Chemistry | Dalton Transactions
Antonío Otero, Juan Fernández‐Baeza, Agustín Lara‐Sánchez, Juan Tejeda, Luis F. Sánchez‐Barba,
Abstract This review concerns the recent studies carried out by our research group and others aimed at the design of heteroscorpionate ligands based on bis(pyrazol‐1‐yl)methane‐containing stereogenic centres. The capability of these systems to stabilize chiral complexes from early to late transition metals, through their behaviour as multidentate hybrid ligands, is also described.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
Tópico(s): Synthetic Organic Chemistry Methods
2008 - Wiley | European Journal of Inorganic Chemistry
Antonío Otero, Juan Fernández‐Baeza, Agustín Lara‐Sánchez, Antonío Antiñolo, Juan Tejeda, E. Martinez-Caballero, Isabel Márquez‐Segovia, I. López-Solera, Luis F. Sánchez‐Barba, Carlos Alonso‐Moreno,
Reaction of hybrid scorpionate/cyclopentadienyl ligands in the form of the lithium derivatives [Li(bpzcp)(THF)] [bpzcp = 2,2-bis(3,5-dimethylpyrazol-1-yl)-1,1-diphenylethylcyclopentadienyl], [Li(bpztcp)(THF)] [bpztcp = 2,2-bis(3,5-dimethylpyrazol-1-yl)-1-tert-butylethylcyclopentadienyl], and the in situ-generated "Li(bpzpcp)" [bpzpcp = 2,2-bis(3,5-dimethylpyrazol-1-yl)-1-phenylethylcyclopentadienyl] with MCl3(THF)3 afforded the group 3 halide compounds [MCl2(bpzcp)(THF)] (M = Sc, 1; Y, 2), [MCl2(bpztcp)(THF)] (M = ...
Tópico(s): Synthesis and Reactivity of Heterocycles
2008 - American Chemical Society | Inorganic Chemistry
Antonío Otero, Juan Fernández‐Baeza, Antonío Antiñolo, Agustín Lara‐Sánchez, E. Martinez-Caballero, Juan Tejeda, Luis F. Sánchez‐Barba, Carlos Alonso‐Moreno, I. López-Solera,
Mixtures of two scorpionate/cyclopentadiene regioisomers—bpzcpH (1-[2,2-bis(3,5-dimethylpyrazol-1-yl)-1,1-diphenylethyl]-1,3-cyclopentadiene (1a) and 2-[2,2-bis(3,5-dimethylpyrazol-1-yl)-1,1-diphenylethyl]-1,3-cyclopentadiene (1b)) and bpztcpH (1-[2,2-bis(3,5-dimethylpyrazol-1-yl)-1-tert-butylethyl]-1,3-cyclopentadiene (2a) and 2-[2,2-bis(3,5-dimethylpyrazol-1-yl)-1-tert-butylethyl]-1,3-cyclopentadiene (2b))—were prepared by deprotonation of bis(3,5-dimethylpyrazol-1-yl)methane with BunLi followed by ...
Tópico(s): biodegradable polymer synthesis and properties
2008 - American Chemical Society | Organometallics
Carlos Alonso‐Moreno, Andrés Garcés, Luis F. Sánchez‐Barba, Mariano Fajardo, Juan Fernández‐Baeza, Antonío Otero, Agustín Lara‐Sánchez, Antonío Antiñolo, L.M. Broomfield, I. López-Solera, Ana M. Rodrı́guez,
The reaction of bis(3,5-di-tert-butylpyrazol-1-yl)methane (bdtbpzm) with BunLi and carbodiimide derivatives, namely, N,N′-diisopropyl and 1-tert-butyl-3-ethyl carbodiimides, gives rise to the new sterically hindered lithium acetamidinate [Li(tbptamd)(THF)] (1) [tbptamd = N-ethyl-N′-tert-butylbis(3,5-di-tert-butylpyrazol-1-yl)acetamidinate] and [Li(pbptamd)(THF)] (2) [pbptamd = N,N′-diisopropylbis(3,5-di-tert-butylpyrazol-1-yl)acetamidinate]. Subsequent hydrolysis of 1 and 2, and the recently reported heteroscorpionate ...
Tópico(s): Organometallic Complex Synthesis and Catalysis
2008 - American Chemical Society | Organometallics
Produção Nacional
Revisado por pares
José Ángel Córdova-Villalobos, Jorge Armando Barriguete Meléndez, Agustín Lara‐Esqueda, Sı́món Barquera, Martín Rosas-Peralta, Mauricio Hernández‐Ávila, María Eugenia de León-May, Lic Admon, Carlos A. Aguilar‐Salinas,
El gobierno federal desarrolla acciones para reducir la mortalidad por las "enfermedades crónicas no transmisibles" (ECNT). Una de ellas es la creación de unidades médicas de especialidad (Uneme) diseñadas para el tratamiento especializado de las ECNT (sobrepeso, obesidad, riesgo cardiovascular y diabetes). La intervención se basa en la participación de un grupo multidisciplinario entrenado ex profeso, la educación del paciente sobre su salud, la incorporación de la familia al tratamiento y la resolución ...
Tópico(s): Health and Lifestyle Studies
2008 - Instituto Nacional de Salud Pública | Salud Pública de México
Antonío Otero, Juan Fernández‐Baeza, Antonío Antiñolo, Juan Tejeda, Agustín Lara‐Sánchez, Luis F. Sánchez‐Barba, Margarita Sánchez‐Molina, Ana M. Rodrı́guez, Carles Bó, Manuel Urbano‐Cuadrado,
The preparation of new hybrid scorpionate/cyclopentadienyl ligands in the form of the lithium derivatives [Li(bpzcp)(THF)] (1) [bpzcp = 2,2-bis(3,5-dimethylpyrazol-1-yl)-1,1-diphenylethylcyclopentadienyl] and [Li(bpztcp)(THF)] (2) [bpztcp = 2,2-bis(3,5-dimethylpyrazol-1-yl)-1-tert-butylethylcyclopentadienyl] or as a mixture of the two scorpionate/cyclopentadiene regioisomers (bpzpcpH) 1-[2,2-bis(3,5-dimethylpyrazol-1-yl)-1-phenylethyl]-1,3-cyclopentadiene (3a) and 2-[2,2-bis(3,5-dimethylpyrazol-1-yl)-1-phenylethyl]- ...
Tópico(s): Ferrocene Chemistry and Applications
2007 - American Chemical Society | Organometallics
Antonío Otero, Juan Fernández‐Baeza, Antonío Antiñolo, Juan Tejeda, Agustín Lara‐Sánchez, Luis F. Sánchez‐Barba, Margarita Sánchez‐Molina, Sonia Franco, I. López-Solera, Ana M. Rodrı́guez,
The work described here represents the first example in which an efficient and highly diastereoselective nucleophilic 1,2-addition of an organolithium reagent has been performed on a carbonylic prostereogenic center to give an enantiopure scorpionate ligand in only one step.
Tópico(s): Synthetic Organic Chemistry Methods
2007 - American Chemical Society | Inorganic Chemistry
Eduardo Meaney, Agustín Lara‐Esqueda, Guillermo Ceballos, Juan Asbún, A. Florez Vela, Yolanda Martínez-Marroquín, Víctor A. López, Alejandra Meaney, E. de la Cabada-Tamez, Oscar J Velázquez-Monroy, Roberto Tapia‐Conyer,
Atherosclerotic ischaemic heart disease is the second leading cause of general mortality in Mexico due to the growing prevalence of atherosclerotic risk factors in our society. The data of the FRIMEX study (Factores de Riesgo en México, Risk Factors in Mexico), considered together with those of other contemporary epidemiological surveys, will aid in our comprehension of the current state of cardiovascular epidemics in Mexico.Frequencies of obesity, hypertension and smoking, and total cholesterol ...
Tópico(s): Diabetes, Cardiovascular Risks, and Lipoproteins
2007 - Elsevier BV | Public Health
Luis F. Sánchez‐Barba, Andrés Garcés, Mariano Fajardo, Carlos Alonso‐Moreno, Juan Fernández‐Baeza, Antonío Otero, Antonío Antiñolo, Juan Tejeda, Agustín Lara‐Sánchez, I. López-Solera,
The reaction of the heteroscorpionate lithium salts [Li(tbpamd)(THF)] [tbpamd = N-ethyl-N'-tert-butylbis(3,5-dimethylpyrazol-1-yl)acetamidinate] and [Li(pbpamd)(THF)] [pbpamd = N,N'-diisopropylbis(3,5-dimethylpyrazol-1-yl)acetamidinate] with 1 equiv of RMgCl proceeds to give very high yields of the neutral heteroscorpionate alkyl magnesium complexes [Mg(R)(NNN)] (NNN = tbpamd, R = C3H5 1, tBu 2, CH2SiMe3 3; NNN = pbpamd, R = C3H5 4, tBu 5, CH2SiMe3 6). On heating toluene solutions of complexes 1−3, 5, and 6, a ligand ...
Tópico(s): Organometallic Complex Synthesis and Catalysis
2007 - American Chemical Society | Organometallics
David Elorriaga, Felipe de la Cruz‐Martínez, María J. Rodríguez‐Álvarez, Agustín Lara‐Sánchez, José A. Castro‐Osma, Joaquín García‐Álvarez,
Abstract Fast addition of highly polar organometallic reagents (RMgX/RLi) to cyclic carbonates (derived from CO 2 as a sustainable C1 synthon) has been studied in 2‐methyltetrahydrofuran as a green reaction medium or in the absence of external volatile organic solvents, at room temperature, and in the presence of air/moisture. These reaction conditions are generally forbidden with these highly reactive main‐group organometallic compounds. The correct stoichiometry and nature of the polar organometallic ...
Tópico(s): Catalysis for Biomass Conversion
2021 - Wiley | ChemSusChem
Jessica C. Romero-Michel, Karen A Mokay-Ramírez, Marina Delgado‐Machuca, Josuel Delgado‐Enciso, Nomely S. Aurelien-Cabezas, Daniel Tiburcio‐Jimenez, Carmen Meza‐Robles, Osiris G. Delgado‐Enciso, José Guzmán-Esquivel, Sergio A Zaizar-Fregoso, Margarita L Martinez Fierro, Iram Pablo Rodríguez Sánchez, Valery Melnikov, Carlos E Barajas-Saucedo, Agustín Lara‐Esqueda, Iván Delgado‐Enciso,
Introduction: COVID-19 pandemic affects human health and the global economy. Its evolution is unpredictable, making it hard for governments to provide response actions suited for all populations. Meanwhile, informal street workers carry on with their labor despite contingency measures to sustain their lives. The objective was to conduct a case-control study to become aware of how street vendors' economy is affected during the COVID-19 pandemic. Methodology: During phase 2 of the COVID-19 pandemic ...
Tópico(s): COVID-19 Pandemic Impacts
2021 - Open Learning on Enteric Pathogens | The Journal of Infection in Developing Countries