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253 matches found for building_blocks

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...

Andrei Yudin Group - Professor Product Portal

Related Links • VIEW PRODUCT LIST • Professor Product Portal • Catalysis and Inorganic Chemistry • Organic Synthetic Chemistry Professor Product Portal Index Professor Andrei Yudin The Yudin laboratory is known for the development of amphoteric molecules and their application in synthesis. The corre...

Medicinal Chemistry

Our portfolio is your exclusive link to the forefront of medicinal chemistry—to integrate the latest advancements and optimize your discovery process. By leveraging our partnership with dozens of the field’s leading synthetic chemists we provide you with newly published products and techniques that ...

Organic & Printed Electronics Technical Resources

Material Matters Issues • Three-dimensional Science • Materials for Flexible and Printed Electronics • Innovative Materials for High-Performance Optoelectronic Devices: OPVs, OFETs, and OLEDs Technology Spotlights Organic Semiconductors • NTz Building Blocks for Organic Semiconductors • Metal-Organi...

Diels–Alder Reaction

The Diels–Alder reaction is the reaction between a conjugated diene and an alkene (dienophile) to form unsaturated six-membered rings. Since the reaction involves the formation of a cyclic product via a cyclic transition state, it is also referred to as a "cycloaddition". The Diels–Alder reaction is...

Poly(Amino Acid) Block Copolymers for Drug Delivery and other Biomedical Applications

Carmen Scholz Department of Chemistry, University of Alabama in Huntsville Huntsville, AL 35899 Email: scholzc@uah.edu Humankind has utilized protein materials throughout its existence, starting with the use of materials such as wool and silk for warmth and protection from the elements and continuin...

Proline Derivatization and Enantioresolution by Chiral GC

• • Download PDF • Amino acids are building blocks of peptides and proteins. Enantiomeric separation of these molecules can be performed through chromatography by chiral stationary phases. This article describes the chiral GC analysis of one amino acid, proline, after achiral derivatization. The ben...

Nagase α,α-disubstituted Amino Acids

Aldrich ChemFiles 2008, 8.7, 7. Chiral quaternary ammonium catalysts can be particularly useful in the field of asymmetric synthesis. Keji Maruoka and co-workers from Kyoto University have reported potent C2-symmetric ammonium salts that catalyze alkylation reactions under remarkably low catalyst lo...

Products for the Petrochemical Industry

The oil industry accelerates the global economy by meeting the demand for petroleum, natural gas, biofuels and petrochemicals. Its success depends upon safe, reliable and efficient processes to ensure that consumers receive a consistent flow of high-quality products. At Sigma-Aldrich, we are here to...

Erick Carreira Group - Professor Product Portal

Professor Product Portal Index Professor Erick M. Carreira The Carreira Research Group is focused on expanding and creating access to uncharted landscape in chemical space. In joint efforts with SpiroChem, Carreira develops innovative spirocyclic building blocks, seeking to make them available to th...

Yu-Wasa Auxiliary for C(sp3)-H Activation

The synthesis of heteroaromatic and aromatic compounds can be utilized in order to install various functionalities onto lead compounds. Typically, the reactivity of the metal catalysts can be modified by various ligands. A variety of ligand-metal systems have been developed for activation of C(sp2)-...

Dry Powder Media Global Supply

SAFC Overview Why Choose SAFC? Media Supply Strategy DPM Manufacturing Capability and Capacity Packaging and Logistics Global Quality Systems Raw Materials Scale-up & Support Services Small Volume Custom Media – imMEDIAte Advantage™ Erythropoietin Hormone (Molecular model) Erythropoietin (EPO) is a ...

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...

Purer Fmocs Means Purer Peptides

All peptide chemists recognize the key to obtaining high purity peptides is to maximize efficiency of every synthetic step. However, not everyone realizes that obtaining high purity peptides also depends on using starting materials of the highest quality - small improvements in starting material qua...

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 ...

New Lab Start-Up Product Savings

Sigma-Aldrich New Lab Start-Up Program – Product Savings With the Sigma-Aldrich New Lab Start Up Program, you will receive: Savings on Essential Life Science Products Cell Culture Discounts (up to) Liquid Media* 50%* Powdered Media 20% Antibiotics 15% Growth Factors 10% Reagents 20% PCR Reagents Dis...

Unsaturated Amino Acids

Recent developments in Chemical Biology research have increased the demand of amino acid building blocks with unsaturated side chains. Alkyne moieties can be used in bioorthogonal synthesis strategies to form hybrid structures, introduce chemical probes into biomolecules, or link large fragments wit...

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...

Preparation of trans-(2-bromovinyl) MIDA Boronate and Vinyl MIDA Boronate from the Corresponding Silanes

Due to the instability of some boronic acids, the Burke group has developed very practical syntheses of some of the more challenging MIDA boronates. For instance, while trans-(2-bromovinyl) MIDA boronate (703478) could be prepared via bromoboration of acetylene and reaction with MIDA in the presence...

Professor Product Portal - Baran Group

Professor Product Portal Index Professor Phil S. Baran Congratulations to Dr. Baran for being named a 2013 MacArthur Fellow. Learn more The Baran Group works with Sigma-Aldrich in providing a portfolio of zinc-based reagents promoting difluoromethylation, trifluoromethylation, trifluoroethylation an...

Carbohydrate-Catalyzed Enantioselective Alkene Diboration

Enantioselective diboration of olefins is a valuable strategy for transforming unsaturated hydrocarbons into useful chiral building blocks. Typically, the process is carried out via transition-metal based activation of diboron reagent. Prof. James Morken has developed metal-free, affordable, enantio...

Flexible Organic Transistors for Biomedical Applications

Tsuyoshi Sekitani,* Kazunori Kuribara, Tomoyuki Yokota, Takao Someya Department of Electric and Electronic Engineering, Department of Applied Physics, School of Engineering University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan Exploratory Research for Advanced Technology (ERATO) Japan S...

Compound Management

Sigma-Aldrich® uses our core operational strengths to drive your success. • Management of your compound or building block collections at dedicated Sigma-Aldrich facilities • Centralized and consolidated compound inventory • Filling and world-wide distribution of your compounds on demand • Management...

Nanomaterials for Advanced Applications

• • Download PDF • Mr. Thomas Juehne, Sigma-Aldrich Corp., St. Louis, MO The union of distinct scientific disciplines is revealing the leading edge of Nanotechnology. Fifteen to twenty years ago, the interdisciplinary activity of geneticists, biologists, immunologists and organic chemists created a ...

Technical Information

The files indicated by an asterisk are in the Adobe Portable Document Format. Click here to download the Adobe Acrobat Reader. Topics • New Jacobsen's Catalyst - Chiral Co(II) Salen Complex Tetrahedron: Asymmetry 1998, 9(4), Back Cover * • New Amino Acid Building Blocks (38 KB PDF) Tetrahedron: Asym...

Tools for PEGylation

Related Links • PEG Selection Guide Polyethylene glycol (PEG) reagents offer numerous favorable characteristics, including high water solubility, high mobility in solution, lack of toxicity and immunogenicity, and ready clearance from the body. Thus, the chemical modification of biologically active ...

Commercial Volumes of Quantum Dots: Controlled Nanoscale Synthesis and Micron-Scale Applications.

• • Download PDF • Nanoco Technologies, Ltd., Manchester, United Kingdom Quantum dots (QDs) are luminescent semiconductor nanoparticles, with diameters in the range of 1 to 20 nm. The unique optical and electronic properties of QDs are being exploited in a number of applications including flat panel...

ChiPros Chiral Acids

Enantiopure α- and ß-hydroxy acids and esters are versatile building blocks for the preparation of a wide range of active pharmaceutical ingredients by incorporating them as esters, amides or ethers, or after further derivatization, as diols, amino alcohols, thioethers. Hydroxy acids are accessible ...

Asymmetric Conjugate Addition

Aldrich ChemFiles 2008, 8.6, 11. In the past 5 years, chiral diene ligands have surfaced for a variety of asymmetric transformations. Hayashi1 and Carreira2 pioneered this field by synthesizing chiral diene ligands that formed stable complexes with metals and exerted high catalytic activity as well ...

Analyzing Properties of Fluorescent Dyes Used for Labeling DNA in Microarray Experiments

BioFiles 2011, 6.3, 9. Dr. Jens Sobek, Catharine Aquino, Dr. Ralph Schlapbach, Functional Genomics Center Zurich, Zurich, Switzerland Cy3 and Cy5 are fluorescent dyes frequently used for microarray analysis. These two dyes have favorable properties, including relatively high fluorescence quantum yie...