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191 matches found for coupling_reactions

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

. Introduction . Advantages . Representative Application . Materials List 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 transformati...

catASium - Advantages & Applications

. Introduction . Advantages . Representative Application . Materials List 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 transformati...

Fro-DO: Novel Ligand for Quaternary Carbon-Carbon Coupling

Successful ligands that electronically facilitate elementary yet vital steps of the catalytic cycle, such as the bond-forming reductive elimination step, are underdeveloped. The major ligand classes associated with transition metal catalysis are predominantly σ-donating in character, including phosp...

DNA Oligonucleotide Synthesis

Phosphoramidite chemistry, developed in the 1980s and later enhanced with solid-phase supports and automation, is the method of choice for DNA oligonucleotide manufacturing. Opposite of biosynthesis, chemical synthesis proceeds in the 3' → 5' direction according to the steps outlined in Figure 1. No...

Chitosan: A Versatile Platform for Pharmaceutical Applications

Raphael Riva and Christine Jerome* Center for Education and Research on Macromolecules University of Liege, Chemistry Department, Sart-Tilman, Building B6a, 4000 Liege, Belgium *Email: c.jerome@ulg.ac.be The development of new medical devices and pharmaceuticals plays an integral role in the medical...

G3 and G4 Buchwald Precatalysts

Related Links • G1 Buchwald Palladacycles • G2 Buchwald Palladacycles • G3 Buchwald Palladacycles • G4 Buchwald Palladacycles • Buchwald GT Capsules • Suzuki-Miyaura Couplings • Buchwald Phosphine Ligands The newest air, moisture, and thermally stable crossing-coupling complexes Visit Stephen Buchwa...

Heck Reaction

The Heck reaction is the palladium catalyzed cross-coupling reaction between alkenes, and aryl or vinyl halides (or triflates) to afford substituted alkenes.1,2 It is a useful carbon–carbon bond forming reaction with synthetic importance. The reaction proceeds in the presence of base and it is highl...

KitAlysis™ High-Throughput Screening Kits

In the high-pressure environment of discovery chemistry, time is everything. While general catalytic methods exist, substrate dependency makes it difficult to predict optimal conditions in practice. A thoughtful screening process is the best way to cover a large amount of chemical space quickly whil...

ChemDose - Advantages, Applications, FAQs and Materials List

. Convenient Dosing of Catalysts and Reagents . Advantages . Representative Application . Frequently Asked Questions (FAQs) . Technical Information for Download (PDF format) . Materials List ChemDose® is a novel technology allowing for the use of chemical reagents and catalysts in the form of tablet...

ChemDose: Chemical Reagents and Catalysts in the Form of Tablets

Convenient Dosing of Catalysts and Reagents: Introduction ChemDose® is a novel technology allowing for the use of chemical reagents and catalysts in the form of tablets. The ~5 millimeter tablets are composed of a chemically inert magnesium aluminosilicate matrix, together with an adsorbed reagent o...

cataCXium®

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. However, de...

NTz Building Blocks for Organic Semiconductors

Fax: +81-48-462-1473, E-mail: takimiya@riken.jp The field of organic electronics has emerged as the next-generation technology potentially enabling ultra-thin, large-area, and/or flexible devices, consisting of organic field-effect transistors (OFETs), organic light-emitting diodes (OLEDs), and orga...

Oligothiophene Synthesis

Kanth Josyula, Mitesh Patel, Kaushik Patel, Scott Batcheller MilliporeSigma, 6000 N. Teutonia Ave. Milwaukee, WI 53209 Introduction Oligothiophenes and their functional derivatives are used in a number of high-technology applications including OLEDs, OFETs and OPVs, where the ability to functionaliz...

Development of Organic Semiconductors from Highly Ordered Oligo and Polythiophenes

Nicholas S. Colella, Lei Zhang, Alejandro L. Briseño* Polymer Science & Engineering Department, University of Massachusetts, Amherst, Massachusetts 01003 *Email: abriseno@mail.pse.umass.edu The soaring global demand for energy, coupled with the limited supply of fossil fuels, has increased the need ...

Willis Pyridinates for Palladium-Catalyzed Cross-Coupling Reactions

Related Links • Chemical Synthesis Technology Spotlights • Synthetic Reagents • C-C Bond Formation Reagentss The Suzuki-Miyaura cross-coupling reaction is one of the most used transformations in the pharmaceutical industry to form carbon-carbon bonds.1,2 However, limitations to the application of th...

Resins for the Fmoc-/tBu-Synthesis of Peptide Acids

The TFA-labile Wang resin is a standard support for batch synthesis of peptide acids following the Fmoc-/tBu-protection scheme.(1,2) It is easily cleaved by treatment with 95% TFA. Special attention should be given to the attachment of the first amino acid residue to this benzyl alcohol type support...

KitAlysis™ Benchtop Inertion Box

KitAlysis™ Benchtop Inertion Box with Lid 1. Tygon tubing (I.D. x O.D. 14 in. x 3/8 in.) 2. 3-way (Y) plastic or glass tubing connector The Aldrich® KitAlysis™ Benchtop Inertion Box provides an inert environment to run oxygen sensitive cross-coupling reactions easily and robustly in a laboratory fum...

Building Blocks for Introducing Post-translational Modified Amino Acids

The Novabiochem® product line has always been at the forefront of the development for methods for the synthesis of peptides containing PTMs, being the first company to provide effective building blocks for synthesis of phosphorylated peptides, and sulfotyrosine and methylated arginine containing pep...

Ir(I)-Catalyzed C–H Borylation

• • Download PDF • Market Segment Manager Organometallics and Catalysis josephine.nakhla@sial.com Arylboronic acids and esters are invaluable tools for the chemical community. These powerful reagents are used for a variety of transformations, most notably the Suzuki-Miyaura cross-coupling reaction. ...

Nickel Precatalysts

Suzuki-Miyuara couplings have been widely commonplace in the formation of C-C bonds, in particular the coupling between two heteroaryl compounds. For the most part, palladium has been the dominant choice of metal catalyst to carrying out cross-coupling reactions between heteroaryl boronic acids and ...

1-tBu-Indenyl Supported Palladium Precatalysts for Cross-Coupling

The Hazari Group has developed an improved palladium precatalyst scaffold for a wide range of cross-coupling reactions. This system combines fast activation from Pd(II) to the active monoligated Pd(0) species under mild conditions, with prevention of deleterious formation of any inactive dimeric Pd(...

Astec Chiral Chromatography Bibliography by Subject

Amino Acids, Peptides, Biomolecules Chemical, Environmental, Petrochemical Chiral LC-MS Food, Beverage, Natural Products Mechanistic Studies Pharmaceutical, Clinical Preparative, SFC, SMB Daniel W. Armstrong Publications Copyright restrictions do not permit us to provide copies of the articles liste...

Chemistry Webinars

Our chemistry webinars are web-based seminars describing the latest, innovative chemical synthesis technologies and products in our catalog. These seminars are convenient to navigate, interactive, and accessed directly via your desktop browser. 2018 Targeted Protein Degradation using Small Molecules...

Yudin and Coworkers Develop a New Line of MIDA Boronate Esters: Amphoteric Alpha-Boryl Aldehydes

MIDA boronates, first developed by Burke and coworkers,1 have been shown to be effective in iterative cross-coupling sequences to provide access to myriad biaryl small molecules and complex natural products.1-2 A serendipitous discovery was made in the Andrei Yudin group.3 In the course of investiga...

Photoredox Iridium Catalyst for Single Electron Transfer (SET) Cross-Coupling

C(sp2)- and C(sp)-hybridized coupling reactions are established catalytic approaches. However, multi-step C(sp3)- and C(sp2)-coupling reactions of boronic acids and related derivatives are still limited by ineffective two-electron transmetalation reactions. These conventional protocols exhibit react...

Organotrifluoroborates: Versatile and Stable Boronic Acid Surrogates

Organotrifluoroborates: Versatile and Stable Boronic Acid Surrogates Prof. Gary Molander has extensively developed the chemistry of organotrifluoroborates. These bench stable boronic acid surrogates are useful for Suzuki-Miyaura cross-coupling reactions and have also been used for a variety of other...

COMU – Safer and More Efficient Peptide Coupling Reagent

Introduction Peptide synthesis relies heavily on efficient and reliable coupling reagents. A low tendency for racemization is a key requirement. This is especially true for solid phase peptide synthesis—quantitative yields with short reaction times are of utmost importance to make the synthesis of l...

Suzuki Miyaura Cross-Coupling - Introduction

• • 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...

F-Triphenylphosphines

The Fluorous Biphase Catalysis Kit for C–C-Couplings contains perfluoro-tagged Pd-catalysts and solvents for up to 10 different catalytic reactions under fluorous biphasic conditions. To get acquainted with this innovative FBC technology our kit provides detailed descriptions of procedures for two C...

MIDA Boronates

The Suzuki-Miyaura cross-coupling reaction of boronic acids is one of the most important and highly utilized reactions in the organic chemistry toolbox, with applications in polymer science as well as in the fine chemicals and pharmaceutical industries. However, many boronic acids are extremely unst...