A5020260828- Asymmetric Synthesis and Catalysis
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Asymmetric Hydrogenation and Catalysis
- Chemical Synthesis and Analysis
- Synthesis and Catalytic Reactions
- Chemical Synthesis and Reactions
- Synthetic Organic Chemistry Methods
- Chemical synthesis and alkaloids
- Organophosphorus compounds synthesis
- Molecular spectroscopy and chirality
- Catalytic C–H Functionalization Methods
- Carbohydrate Chemistry and Synthesis
- Sulfur-Based Synthesis Techniques
- Coordination Chemistry and Organometallics
- Axial and Atropisomeric Chirality Synthesis
- Chemical Reaction Mechanisms
- Phytochemicals and Antioxidant Activities
- Chemical Reactions and Mechanisms
- Synthesis and Reactivity of Sulfur-Containing Compounds
- Synthesis and Reactions of Organic Compounds
- Metabolomics and Mass Spectrometry Studies
- Antioxidant Activity and Oxidative Stress
- Catalytic Alkyne Reactions
- Bee Products Chemical Analysis
Universidad de las Américas Puebla
2009-2024
Instituto Politécnico Nacional
1996-2017
Autonomous University of Tlaxcala
2017
Instituto Tecnológico de Tijuana
2011-2015
Philadelphia University
2004-2009
University of Pennsylvania
2007
Benemérita Universidad Autónoma de Puebla
1996-2006
Center for Research and Advanced Studies of the National Polytechnic Institute
1996-2003
Centro de Investigación en Materiales Avanzados
1996-1997
Technische Universität Braunschweig
1987
Carotenoids constitute compounds of significant biological interest due to their multiple activities, such as antimicrobial, anticancer, antiadipogenic, antidiabetic, and antioxidant properties. Metabolic syndrome (MetS) comprehends a series metabolic abnormalities (e.g., hypertension, obesity, atherogenic dyslipidemia) that can affect children, adolescents, the elderly. The treatment MetS involves numerous medications, which, despite efficacy, pose challenges prolonged use, high costs,...
This Account describes convenient procedures for the preparation of several enantiopure β-amino alcohols and β-diamines, which have proved to be efficient ligands in relevant stereoselective reactions such as alkylation enolates hydrogenation carbonyl compounds. Furthermore, title compounds are useful precursors various chiral oxazolidinones, oxazinones, phosphonamides, etc., allow enantioselective formation a wide variety derivatives, including alcohols, aldol condensation products,...
Alkynes of reactions: Recent breakthroughs in metal-catalyzed alkyne reactions, which expand the synthetic utility alkynes, have been achieved. These approaches broaden range alkynes that are accessible by C--N and C--C bond-forming reactions demonstrate use bifunctional heterobimetallic catalysts can lead to new reactivity excellent enantioselectivity (see scheme).
In the past decade, organocatalytic asymmetric Michael addition has emerged as one of most important carbon-carbon bond forming reactions in organic chemistry. As an example, conjugated ketones to nitroolefins received extensive attention, since resulting nitroalkanes are versatile intermediates which nitro group can be transformed into various useful functional groups. Furthermore, reaction ability introduce two vicinal stereogenic centers a single step. Stimulated by seminal work List,...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOrigin of the ".beta.-Oxygen Effect" in Barton Deoxygenation ReactionDavid Crich, Athelstan L. J. Beckwith, Chen Chen, Qingwei Yao, Ian G. E. Davison, Robert W. Longmore, Cecilia Anaya de Parrodi, Leticia Quintero-Cortes, and Jesus Sandoval-RamirezCite this: Am. Chem. Soc. 1995, 117, 34, 8757–8768Publication Date (Print):August 1, 1995Publication History Published online1 May 2002Published inissue 1 August...
We synthesized six new camphor-derived homochiral thioureas 1–6, from commercially available (1R)-(−)-camphorquinone. These compounds 1–6 were evaluated as asymmetric organocatalysts in the stereoselective formation of glycosidic bonds, with 2,3,4,6-tetra-O-benzyl-D-glucopyranosyl and 2,3,4,6-tetra-O-benzyl-D-galactopyranosyl trichloroacetimidates donors, several alcohols glycosyl acceptors, such methanol, ethanol, 1-propanol, 1-butanol, 1-octanol, iso-propanol, tert-butanol, cyclohexanol,...
The quality of foods has led researchers to use various analytical methods determine the amounts principal food constituents; some them are NMR techniques with a multivariate statistical analysis (NMR-MSA). present work introduces set NMR-MSA novelties. First, double pulsed-field-gradient echo (DPFGE) experiment refocusing band-selective uniform response pure-phase selective pulse for excitation 5–10-ppm range wine samples reveals novel broad 1H resonances. Second, an foodomics approach...
Six new pyranoanthocyanins were synthesized through the reaction between dephinidin-3-sambubioside and cyanidin-3-sam-bubioside, extracted from roselle calyxes, with 4-vinylphenol, acetone 2-butanone. The products characterized by liquid chromatography coupled to mass spectrometry (HPLC-TOF-MS), ul-traviolet-visible spectroscopy (UV/Vis) high-performance chromatography. Those pigments belong families of pino-tins methylpyranoanthocyanins show a hypsochromic shift, which results in more...
The use of spectroscopic and spectrometric techniques to isolate, quantify, characterize bioactive compounds from edible plants has become a common mandatory activity in food chemistry. As technology advances, diverse methodologies are being applied more frequently, which coupled most the time give best diagnosis information metabolite interest. In this paper, we state different approaches that have been performed by our research group identify, apply organic obtained some vegetal extracts....
Beta-amino alcohols (S,S,S)-1 and (R,R,S)-1, derived from cyclohexene oxide containing alpha-phenylethyl auxiliaries, were examined as chiral promoters in the addition of diethylzinc to benzaldehyde. In agreement with literature precedent, N-alpha-phenylethyl auxiliary had no significant impact on enantioinduction, which is determined by configuration framework's C(OH), unlike induction. Contrary some reports, stereoinduction lithium salt derivatives (R,R,S)-1 was lower than that obtained...
Abstract: Even though there has been an important evolution in the synthesis of oligosaccharides, efficient and stereoselective study glycosidic bonds through non-toxic, moderate, inexpensive techniques is one most challenging fields organic synthesis. Glycosyl reactions play a fundamental role biological material structure-activity relationships, having numerous medicinal chemistry applications. For this, interesting strategies have evolved over years to control stereoselectivity bonds,...