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    Search term:"natural_product_synthesis"

    21 matches found for natural_product_synthesis

    Synthesis of Polyene Natural Products Using Polyene MIDA Boronates

    Palladium-catalyzed cross-coupling reactions are ideal methods for the synthesis of polyenes because of the stereospecificity of the reactions and the mildness of the reaction conditions. However, polyenylboronic acids are very unstable and therefore difficult to employ in the synthesis of polyenes ...

    [JIM BALL TEST DOC] MIDA-protected Boronate Esters

    Josephine Nakhla 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 are...

    Gwilherm Evano Group - Professor Product Portal

    Professor Product Portal Index Professor Gwilherm Evano Research in the Evano group focuses on three areas: natural product synthesis, copper catalysis, and the chemistry of hetero-substituted alkynes. In particular, they developed a set of efficient and robust procedures, mostly based on copper cat...

    Stephenson Group – Professor Product Portal

    Professor Product Portal Index Professor Corey Stephenson Research in the Stephenson lab focuses upon the development of new chemical methods which enable the activation of chemical bonds under mild reaction conditions. Specifically, they focus their efforts in three areas: (1) the development of ne...

    PEPPSI™ Catalyst

    Aldrich ChemFiles 2006, 6.3, 2. Palladium has played a central role in the expeditious preparation of complex organic molecules, since the discovery and subsequent catalytic use of Pd(PPh3)4 by Malatesta, Angoletta and others.1 In the world of catalysis, the ancillary ligands of any Pd complex repre...

    Zhang Group - Professor Product Portal Index

    Professor Product Portal Index Professor Liming Zhang The major research thrust in Professor Liming Zhang’s group is homogeneous gold catalysis ranging from discovery of novel reactivities, design of new ligands, development of versatile synthetic methods and application in natural product synthesis...

    MacMillan Imidazolidinone OrganoCatalysts™ | Product Highlights

    Aldrich ChemFiles 2006, 6.2, 9. Product Highlights • Superior enantiocontrol in numerous transformations • High activities at low catalyst loadings • Extraordinary functional group tolerance • Asymmetric α-fluorination employed in natural product synthesis MacMillan and co-workers have created chira...

    Metal and Phosphine Mediated Transformations - Aldrich ChemFiles 2009, 9.2, 7.

    Aldrich ChemFiles 2009, 9.2, 7. Functionalized allyl boronates are useful building blocks in natural product synthesis. Olsson et al. reported the use of a palladium pincer complex in combination with diboronic acid for the boronation of readily available allylic alcohols. Under mild conditions, a v...

    Diethyl Azodicarboxylate in Chemical Synthesis

    Diethyl azodicarboxylate (DEAD), a widely used reagent, is now available again from Sigma-Aldrich. Due to increased safety regulations, domestic shipment of DEAD as a dry reagent is prohibited. Sigma-Aldrich recently achieved full compliance with UN and US DOT safety regulations and is proud to offe...

    [RhOH((S)-BINAP)]2 (1), [RhOMe((S)-BINAP)]2 (2), and Catalyst Precursors

    In the late 1990s, the Hayashi group successively developed rhodium-based catalysts applied in the asymmetric, conjugate addition of arylboronic acids to C=C bonds.1 They utilized Rh-BINAP catalysts to effect several advantages over other enantioselective 1,4-addition reactions: 1) high selectivitie...

    Synthetic Reagents Electrochemical Allylic Oxidation (TCNHPI)

    Professor Phil Baran and coworkers have developed a new reagent, N-Hydroxytetrachlorophthalimide (ALD00564), which provides a cheap, scalable, and safe synthetic alternative to highly used transformations like allylic oxidations, as well as Negishi and Suzuki–Miyaura type cross-coupling reactions. I...

    Dennis Hall - Professor Product Portal

    Professor Product Portal Index Professor Dennis Hall Research in the Hall Group is centered on organoboron chemistry and explores various applications of boronic acid derivatives in reaction development, catalysis, natural product synthesis, and chemical biology. Hall and his co-workers have pioneer...

    Thiazoles and Imidazoles

    • • Download PDF • Thiazoles and imidazoles have been frequently discovered as a vital component of novel and structurally diverse natural products that exhibit a wide variety of biological activities. The exceptional range of antitumor, antiviral, and antibiotic activities, as well as their presenc...

    Thiazoles - ChemFiles Volume 11 Article 1

    Thiazoles have been frequently discovered as a vital component of novel and structurally diverse natural products that exhibit a wide variety of biological activities. Their presence in peptides, their ability to bind to proteins, DNA, and RNA, as well as the exceptional range of antitumor, antivira...

    Metal and Phosphine Mediated Transformations

    Functionalized allyl boronates are useful building blocks in natural product synthesis. Olsson et al. reported the use of a palladium pincer complex in combination with diboronic acid for the boronation of readily available allylic alcohols. Under mild conditions, a variety of allylic alcohols were ...

    Metathesis Catalysts

    Olefin metathesis has led scientists to discover new disconnections in organic synthesis, paving the way for new advances in polymer chemistry, drug discovery, and natural product synthesis. Sigma-Aldrich is proud to be the exclusive provider of Materia’s ruthenium-based metathesis catalysts for res...

    Ynamides: Versatile and Enabling Building Blocks for Chemical Synthesis

    The development of original and versatile reagents in modern organic synthesis is of crucial importance for the design of new chemical transformations that enable the fast and efficient assembly of a variety of complex molecules. In this context, nitrogen-substituted alkynes, commonly named “ynamide...

    Sigma-Aldrich - Chem Product Central

    Sigma-Aldrich provides the most comprehensive range of products and enabling technologies for chemical research. To browse the Aldrich Chemistry Product Lines, simply mouse over your area of interest below. Technology Spotlights • NEW! Electrochemical Allylic C–H Oxidation with N-Hydroxytetrachlorop...

    MacMillan Imidazolidinone OrganoCatalysts™

    Product Highlights • Superior enantiocontrol in numerous transformations • High activities at low catalyst loadings • Extraordinary functional group tolerance • Asymmetric α-fluorination employed in natural product synthesis MacMillan and co-workers have created chiral imidazolidinone organo-catalys...

    Pyridines

    Aldrich ChemFiles 2006, 6.6, 9. Pyridines have been of interest to scientists across a number of disciplines. The pyridine moiety is presented in countless molecules with applications as varied as catalysis, drug design, molecular recognition, and natural product synthesis. Recently, Blackaby and co...

    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...