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    Search term:"catalysis"

    777 matches found for catalysis

    BRIDP from Takasago - New Ligands for Cross-Coupling Catalysts

    Cross-couplings have been an essential reaction class for the past 20 years. They are used for the synthesis of a plethora of products ranging from drug molecules to polymers. Since the first report of cross-coupling catalysis by Tsuji and Trost, an exponential number of catalytic systems have been ...

    Buchwald Precatalysts and Ligand Guide

    Dialkylbiaryl phospine ligands, and the precatalysts derived from them, are commonly referred to as Buchwald Precatalysts and Ligands. These reagents have developed into a highly valuable class of compounds for palladium catalysis and can now be used for a broad range of reactions. This brochure is ...

    Buchwald Phosphine Ligands - For C-C, C-N, and C-O Bond Formation

    For C-C, C-N, and C-O Bond Formation: Over the past several years, the Buchwald group has developed a series of bulky electron-rich phosphines that have garnered much attention for their ability to effect various C–C, C–N, and C–O bond formations.1 In particular, the SPhos and XPhos ligands have pro...

    N-Heterocyclic Carbene Ligands - Chemical Synthesis

    Rapid progress in cross-coupling reactions of unactivated substrates catalyzed by metal complexes has transformed the chemical marketplace through introduction of an extensive library of achiral and chiral phosphine ligands. The positive effects of phosphine ligands are exemplified in the numerous r...

    GRKs

    The superfamily of G protein-coupled receptors (GPCRs) contains upwards of 1000 distinct members that mediate the vast majority of responses to hormones, neurotransmitters, sensory stimuli, and various autocrine and paracrine factors. These integral membrane proteins have a conserved primary structu...

    Carreira DOLEFIN Ligands - Technology Spotlights

    The selective preparation of diarylmethine stereogenic centers is a challenging endeavor in chemical synthesis, especially when there is little differentiation between the two aryl groups. As a result, the methods for the stereoselective synthesis of this motif are rather limited.1 Recent work by Ca...

    DABAL-Me3 in Chemical Synthsis

    Introduction Trimethylaluminum is a valuable reagent in organic synthesis due to its role both as a Lewis acid and a methyl anion equivalent. However, because of its pyrophoric nature, it cannot be easily handled in most laboratory settings. Developed by the Woodward group (University of Nottingham,...

    Abigail Doyle Group – Professor Product Portal

    Professor Product Portal Index Professor Abigail Doyle Research in the Doyle group focuses on two areas: nucleophilic fluorination and nickel catalysis. The Doyle group has developed several reagents that advance these research areas. In fluorination, 2-pyridinesulfonyl fluoride (PyFluor) can be use...

    GSK-3

    GSK-3 is a highly conserved family of protein kinases. In humans, two genes encode two distinct, but closely related GSK-3 forms, referred to as GSK-3α and GSK-3β. They display 84% overall identity and 98% identity within their catalytic domain, the main difference between the two coming from an ext...

    glyoxalase I
    Synonyms GLOD1, GLYI
    Species Human (2739) , Species Mouse (109801) , Species Rat (294320) , Species Zebrafish (368213) , Species domestic cat (101085123) , Species cow (540335) , Species dog (474894) , Species chicken (421428) , Species sheep (101102520) , Species domestic guinea pig (100726491) , Species naked mole-rat (101699804)
    Summary: The enzyme encoded by this gene is responsible for the catalysis and formation of S-lactoyl-glutathione from methylglyoxal condensation and reduced glutatione. Glyoxalase I is linked to HLA and is localized to 6p21.3-p21.1, between HLA and the centromere. [provided by RefSeq, Jul 2008]

    Anti-tumor agents by mechanisms of action

    • Angiogenesis Inhibitors • DNA Intercalators / Cross-linkers • DNA Synthesis Inhibitors • DNA-RNA Transcription Regulators • Enzyme Inhibitors • Gene Regulation • Microtubule Inhibitors • Other Antitumor Agents Angiogenesis Inhibitors Name Biological activity Product No. Angiostatin K1-3 A proteoly...

    Nanoarchitecture of Protective Coatings for Air Sensitive Metal Hydrides

    • • Download PDF • Institute for Micromanufacturing, Louisiana Tech University Hydrogen storage materials are being considered for safe on-board vehicle storage of H2 gas used to power proton exchange membrane fuel cells. There are various methods for storing hydrogen,1 which include high pressure s...

    cataCXium® - Ligands and Complexes for Efficient Cross-Coupling Reactions

    Introduction Cross-coupling reactions are an important class of catalytic transformations with applications in polymer science as well as in the fine chemicals and pharmaceutical industries. The use of aryl chlorides for these transformations is preferred due to their low cost and their availability...

    DalPhos Ligands

    Professor Mark Stradiotto and coworkers at Dalhousie University have developed air-stable Dalphos, which contains the bulky di(1-adamantyl)phosphino [P(1-Ad)2] fragment. These chelating N,P ligands are useful for previously unprecedented Pd-catalyzed C-N and C-C bond formation. Both Me-DalPhos (Cat....

    Coleus (Coleus forskohlii) | Plant Profiler

    Synonyms / Common Names / Related Terms Coleon U-quinone coleus, coleonol, Coleus amboinicus Lour (CA), Coleus barbatus Benth, Coleus blumei, Coleus blumei Benth, Coleus carnosifolius, Coleus galeatus, Coleus kilimandschari, Coleus parvifolius, Coleus scutellarioides, coleus solenostemon rotundifoli...

    Enzyme Class Index: Hydrolases on esters

    Sigma offers over 1,600 enzymes as well as associated inhibitors and substrates. TO SEARCH FOR AN ENZYME BY EC # OR REACTION CATALYZED... 1. Click on a category in the menu below 2. Scroll down the list to the enzyme of interest 3. Click on the Product # to access product listing and related informa...

    Products for Angiogenesis, Antitumor Agents, Cancer Markers, Carcinogens, Chemopreventive Agents

    During the last twenty years our understanding of the biology of cancer has increased dramatically. It is now widely recognized that cancer results from a series of genetic alterations causing a loss of normal growth controls, resulting in unregulated growth, lack of differentiation, apoptosis, geno...

    Palladium-Catalyzed Reaction of Aryl Iodides with ortho- Bromoanilines and Norbornene/Norbornadiene: Unexpected Formation of Dibenzoazepine Derivatives-

    The cross-coupling reaction of aryl bromides and iodides with aliphatic and aromatic thiols catalyzed by palladium complexes of the bisphosphine ligand CyPF-tBu (1) is reported. Reactions occur in excellent yields, broad scope, high tolerance of functional groups, and with turnover numbers that exce...

    CRISPR/Cas Nuclease RNA-guided Genome Editing

    Sigma-Aldrich is proud to offer its newest line of genome editing tools, Sigma CRISPRs, to the global research community. As the first company to commercially offer targeted genome editing technology nearly ten years ago, no one has more expertise in this field than Sigma-Aldrich. This experience is...

    Jacobsen Thioureas in Chemical Synthesis

    New Versatile Organocatalysts In 2002, Jacobsen’s group first reported the application of thiourea organocatalyst 1 (693421) in the asymmetric Strecker reaction. Since that initial report, Jacobsen's group have developed a range of chiral thioureas that are versatile, effective organocatalysts. A ra...

    Catalysis Screening Kits in Chemical Synthesis - Technology Spotlights

    Accelerate Methodology Discovery, Lead Generation, and Process Optimization Aldrich’s chemistry kits for catalysis screening offer the broadest range of technologies available in convenient packaging. Kits contain sets of catalysts, achiral or chiral ligands, and scavengers with varying steric and e...

    Diazald in Chemical Synthesis

    Diazomethane is an extremely versatile reagent for the preparation of both carbon-carbon and carbon-heteroatom bonds.1 It is one of the most common methylating reagents for the preparation of methyl esters from the corresponding carboxylic acids.2 Additionally, diazomethane has found extensive appli...

    Halloysite Nanotubes Applications in Nanomaterials Research

    Related Products • Nano Minerals: Nanoclays • Nanopowders and Nanoparticle Dispersions Related Articles • Nano Minerals: Nanoclays • Nanoclays: Versatile Building Blocks for Multi-Functional Composites • Polymer Science Resources • Biomaterials Resources • Nanomaterials Resources Halloysite, a natur...

    Cancer Research Techniques | Learning Center

    By focusing on analysis techniques and protocols specific for Cancer Research, Sigma-Aldrich is putting your research needs first. We will be featuring different cancer research tools throughout the year, providing you with the latest techniques and products necessary for the applications. Check bac...

    JAKs

    The Janus kinases were initially identified as a novel subfamily of 120-140 kDa cytoplasmic tyrosine kinases that uniquely contained two, tandem domains with homology to tyrosine kinase catalytic domains. Initial insights into their roles in signal transduction came from genetic studies of interfero...

    Enzyme Explorer Class Index: Hydrolases on Glycosidases

    Sigma offers over 1,600 enzymes as well as associated inhibitors and substrates. TO SEARCH FOR AN ENZYME BY EC # OR REACTION CATALYZED... 1. Click on a category in the menu below 2. Scroll down the list to the enzyme of interest 3. Click on the Product # to access product listing and related informa...

    Serine Hydrolase Inhibitors

    The advertised selection of serine hydrolase inhibitors, developed by the Boger group, represents a small, but powerful library of urea-derived molecules that can bind irreversibly to the target enzyme by active site carbamoylation of the catalytic serine.1 There are approximately 240 different huma...

    An Improved Protocol for the Pd-Catalyzed r-Arylation of Aldehydes with Aryl Halides

    A series of palladacyclic precatalysts that incorporate electron-rich di-tert-butylphosphino biaryl ligands is reported. These precatalysts are easily prepared, and their use provides a general means of employing bulky ligands in palladium-catalyzed cross-coupling reactions. The application of these...

    Aldrich ChemFiles

    Aldrich ChemFiles is a FREE quarterly newsletter written by our experts from Product Management and R&D, highlighting our latest innovative products from: Building Blocks, Synthetic Reagents, Asymmetric Synthesis, Catalysis and Inorganic Reagents, Organometallic Reagents, Chemical Biology, Specialty...

    Jørgensen’s Organocatalysts in Chemical Sythesis

    Introduction Professor Karl Anker Jørgensen and his group have developed (R)- and (S)-α,α-bis[3,5-bis(trifluoromethyl)phenyl]-2-pyrrolidinemethanol trimethylsilyl ether which serve as excellent chiral organocatalysts in the direct asymmetric α-functionalization of aldehydes.1 In the field of asymmet...

    Application Guide for Palladium Catalyzed Cross-Coupling Reactions

    Download (1MB) Palladium catalyzed cross-coupling reactions have revolutionized the way in which molecules are constructed. From the fields of organic synthesis and medicinal chemistry, to materials science and polymer chemistry, cross-coupling has impacted multiple areas of science. The field of cr...