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    Search term:"ligands"

    575 matches found for ligands

    Salvia divinorum (Salvia divinorum) | Plant Profiler

    Synonyms / Common Names / Related Terms Diviner's mint, diviner's sage, divinorin A, divinatorin A, divinatorin B, divinatorin C, divinatorin D, divinatorin E, hardwickiic acid, hierba Maria (Spanish), hojas de la pastora (Spanish), hojas de Maria pastora (Spanish), la hembra (Spanish), la Maria (Sp...

    MIDA-protected Boronate Esters

    • • Download PDF • Product Manager The Suzuki-Miyaura cross-coupling reaction is one of the most important and highly utilized reactions in organic chemistry, with applications in polymer science as well as in the fine chemicals and pharmaceutical industries. However, some classes of boronic acids a...

    Rearrangement of Allylic Acetates

    Aldrich ChemFiles 2009, 9.2, 16. Marion and co-workers reported the first rearrangement of allylic acetates using a gold catalyst ligated to an N-heterocyclic carbene ligand. A bulky ligand bound to the gold catalyst proved imperative to this approach. The catalyst system was found to be highly vers...

    N-Heterocyclic Carbene Ligands

    Aldrich ChemFiles 2006, 6.8, 14. Product Highlights • Mediate an incredible breadth of transformations • Provide robust stability to the metal center • More active in many reactions than the related phosphine catalysts • Readily modified to incorporate chirality, immobilization, and H2O solubility N...

    Mild Mg – Halogen Exchange

    • • Download PDF • In recent years, substantial progress has been made in magnesium–halogen exchange reactions used for the preparation of functionalized Grignard reagents containing sensitive moieties such as ester or cyano groups.1 Typically, the exchange must be performed below room temperature t...

    Scavengers

    Vol. 2, No. 6 Functionalized SILICA GELS for Organic Synthesis Download PDF (805 KB) Introduction / Quality Control / Organic Synthesis / Scavengers Supported Reagents / Linker Resins / References Scavengers Metal Scavengers / Electrophilic Scavengers / Nucleophilic Scavengers 53,792-6 3-(Diethylene...

    Transition-Metal Catalysts

    A variety of transition-metal catalysts for the Suzuki coupling reaction are available from Aldrich. The majority of these catalysts are palladium- and nickelbased, typically utilizing phosphine-derived ligands.1-2 back to top 1. Suzuki, A. J. Organomet. Chem. 1999, 576, 147. 2. Stanforth, S. Tetrah...

    NHC Ligands

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

    High Affinity Polyvalent Nanoether SAMs on Gold: Why More is Better

    • • Download PDF • SensoPath Technologies, Inc. Self-assembled monolayers or SAMs of thiols and organic disulfides on gold surfaces were described by Nuzzo and Allara in 19831 as a considerable improvement over difficult to maintain Langmuir-Blodgett monolayers. Extensive studies by these authors an...

    KIT ligand
    Synonyms FPH2, KL-1, Kitl, MGF, SCF, SF, SHEP7
    Species Human (4254) , Species Rat (60427) , Species Goat (100860807) , Species sheep (443371) , Species domestic guinea pig (100721734) , Species chicken (396028) , Species domestic cat (493937) , Species dog (403507) , Species Horse (100034127) , Species cow (281885)
    Summary: This gene encodes the ligand of the tyrosine-kinase receptor encoded by the KIT locus. This ligand is a pleiotropic factor that acts in utero in germ cell and neural cell development, and hematopoiesis, all believed to reflect a role in cell migration. In adults, it functions pleiotropically, while mostly noted for its continued requirement in hematopoiesis. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

    Asymmetric Aldol Reaction Using Bis-ProPhenol Ligands

    Aldrich ChemFiles 2008, 8.6, 10. The aldol reaction is an important tool for the synthesis of complex molecules. However, the chemo- and regioselectivity of this reaction is usually poor. In view of these challenges, Trost and co-workers developed a new ligand capable of performing aldol reactions e...

    Supported Reagents

    Vol. 2, No. 6 Functionalized SILICA GELS for Organic Synthesis Download PDF (805 KB) Introduction / Quality Control / Organic Synthesis / Scavengers Supported Reagents / Linker Resins / References Supported Reagents Bases and Acid Scavengers / Coupling Reagents / Oxidizing Reagents Phosphines / Diol...

    DSM MonoPhos Family- Highly Efficient Privileged Ligands

    Highly Efficient Privileged Ligands Introduction Aldrich, in our collaboration with DSM, is pleased to offer a range of MonoPhos™ ligands for the research market.† Feringa and co-workers have invented a diverse array of these chiral, monodentate phosphoramidites based on the privileged BINOL ...

    Reetz Ligands

    Aldrich ChemFiles 2008, 8.2, 54. In 1998, Reetz et al. reported the synthesis of a new generation of ligand for enantioselective, catalyzed hydrogenation. Based on BINOL-derived diphosphonite molecules, these ligands showed good enantioselectivities for the asymmetric hydrogenation of terminal alken...

    Vol 2 No 4

    Vol . 2, No. 4 Unnatural Amino Acids II The latest Update on New Tools for Drug Discovery Click here to download PDF version. (688 KB) Introduction / Cyclic Amino Acids / Diamino Acids / ß-Amino Acids and Homo Amino Acids Alanine Derivatives / Phenylalanine Boronic Acids / Proline and Pyroglutamine ...

    Dextran and Related Polysaccharides

    • • Download PDF • Dextran Historically, dextrans had been long recognized as contaminants in sugar processing and other food production. The formation of dextran in wine was shown by Pasteur to be due to the activity of microbes.1 The name dextran was created by Scheibler in 1874, who demonstrated ...

    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...

    N-Heterocyclic Carbenes

    Echavarren and co-workers have also demonstrated the utility of Au-NHCs in the reactions of 1,6-enynes. They determined that the outcome of the cyclization of 1,6-enyne 1 (Scheme 1) was dependent on the ligand coordinated to the metal. When 2 was used in combination with AgSbF6, the major product re...

    Cell Signaling & Neuroscience: Ligand Gated Ion Channels

    The majority of ion channels fall into two broad categories: voltage-gated ion channels (VGIC) and ligand-gated ion channels (LGIC). The LGIC superfamily of receptors contains an intrinsic ion channel, which undergoes a conformational change following the binding of an extracellular ligand to its si...

    Negishi cross-coupling of secondary alkylzinc halides with aryl/heteroaryl halides using Pd-PEPPSI-IPent

    Over the past two decades, considerable attention has been given to the development of new ligands for the palladium-catalyzed arylation of amines and related NH-containing substrates (i.e. Buchwald-Hartwig amination). The generation of structurally diverse ligands, by research groups in both academ...

    Current References on RNAi

    Looking for current application references in the field of RNAi? Look no further. Listed below are many of the top research articles relevant to RNAi and Functional Genomics research. Articles include shRNA, lentiviral-based systems, delivery to various cell lines and transgenic animals, as well as ...

    Asymmetric Aldol Reaction Using Chiral Sulfonamide Ligands

    Aldrich ChemFiles 2008, 8.6, 9. Walsh and co-workers developed a chiral diamine ligand used in the alkylation, arylation and vinylation of ketones under high enantiocontrol.1 The activity of this new ligand toward the vinylation of ketones has been demonstarted using a variety of vinylzinc intermedi...

    Pd-Catalyzed Cross-Coupling Reactions

    • • Download PDF • Ph.D. Product Manager troy.ryba@sial.com A variety of widely used palladium-catalyzed cross-coupling reactions can now be run under mild room temperature conditions in water with TPGS- 750-M, using a variety of commercially available palladium complexes and ligands. These transfor...

    Selective Protonation of Methyl Groups in Highly Deuterated Proteins

    Vitali Tugarinov Department of Chemistry and Biochemistry Center for Biomolecular Structure and Organization University of Maryland, College Park, Maryland 20742 Lewis E. Kay Departments of Molecular Genetics, Biochemistry and Chemistry University of Toronto Toronto, Ontario, Canada M5S 1A8, and Hos...

    Discover Bioactive Small Molecules for Apoptosis

    Apoptosis, or programmed cell death (PCD), is a selective process for the removal of unnecessary, infected or transformed cells in various biological systems. As it plays a role in the homeostasis of multicellular organisms, apoptosis is tightly regulated through two principal pathways by a number o...

    Landis Ligands in Chemical Synthesis

    Diazaphospholane Ligands for Catalytic Asymmetric Transformations Introduction The interest in asymmetric reactions has been growing for the past 40 years. To address the challenges of synthesizing chiral building blocks with high yields and high selectivities, researchers developed a broad range of...

    Product Citations and Publications

    • AQUA™ Peptides • PEPscreen®: Custom Peptide Libraries • SPOTs: Custom Peptide Arrays 1. Guenther, J.F., et al., Phosphorylation of soybean nodulin 26 on serine 262 enhances water permeability and is regulated developmentally and by osmotic signals. Plant Cell, 15(4), 981-991 (2003). Abstract 2. Br...

    Ligand-Controlled Palladium-Catalyzed Regiodivergent Suzuki- Miyaura Cross-Coupling of Allylboronates and Aryl Halides-

    Pd-PEPPSI-IPent has proven to be an excellent catalyst for the Negishi cross-coupling reaction of secondary alkylzinc reagents with a wide variety of aryl/heteroaryl halides. Importantly, b-hydride elimination/migratory insertion of the organometallic leading to the production of isomeric coupling p...

    P2 Receptors: P2Y G-Protein Family

    Once known as P2 purinoreceptors, surface receptors for extracellular nucleotides are now called P2 receptors. This subtle change in nomenclature reflects the more varied nature of nucleotidic ligands, other than those containing a purine moiety, that are capable of activating these surface receptor...

    HumanKine® Thermostable bFGF

    Introduction Methods – Determining stability of bFGF cytokines at elevated temperatures – Culture of human iPS cells – Expansion of ENStem™-A human neural progenitors Results Discussion Materials Fibroblast growth factors (FGFs) are secreted glycoproteins that regulate several fundamental developmen...

    Asymmetric Epoxidation of Homoallylic Alcohols

    While there are various efficient catalytic systems for the asymmetric epoxidation of allylic alcohols, the extension to homoallylic alcohols had not been demonstrated. While the catalytic system reported above allowed for the desired transformations, the enantioselectivities achieved were a major l...