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138 matches found for organic_synthesis

Greener Methods: Catalytic Amide Bond Formation

Introduction Amide bonds are one of the most frequently utilized disconnections in organic synthesis. Methods to form this vital functionality are commonly superstoichiometric, leading to considerable waste in the process. These facts have led the American Chemical Society Green Chemistry Institute ...

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...

Piperazines - Aldrich ChemFiles 2005, 5.5, 1.

Aldrich ChemFiles 2005, 5.5, 1. Sigma-Aldrich is pleased to offer the third installment of our Privileged Structures ChemFiles. This piece will focus on the piperazine scaffold. We will discuss application data, Sigma-Aldrich building blocks that have been highlighted in the recent literature, and t...

DSM MonoPhos™

In collaboration with DSM, we are 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 platform.1 The MonoPhos™ family has exhibited high levels of enan...

Glycine Hydrochloride for Cell Culture

• • Download PDF • PharmaGrade, manufactured under appropriate controls for use as a raw material in pharma or biopharmaceutical production. Suitable for cell culture. • Product Regulatory Datasheet • Cherokee Buffers Quality Overview • Cherokee Buffers Site and Supply Chain Security Overview 1. Gen...

Custom OEM Services and Outsourcing Expertise - The Need for a Unique Solution to a Traditional Approach

A top pharmaceutical company with a growing portfolio of monoclonal antibodies and other biopharmaceuticals was faced with new challenges in pharmaceutical analysis. The traditional approach of using neat materials as reference materials was no longer the best alternative due to their instability, a...

Heterocycle and Cyclic Peptide Formation with Pinc

Related Articles • Chemical Synthesis Technology Spotlights Categories • Cyclizations • Drug Discovery • Isocyanides • Organic Synthesis • Yudin Isocyanides are widely used reagents in organic synthesis, with applications ranging from materials science to drug discovery. In the course of a chemical ...

Chemfiles Volume 5 Article 6 - Ionic Liquids

• • Download PDF • Sigma-Aldrich is proud to offer a new series of ChemFiles—called Enabling Technologies—to our Chemistry customers. Each piece will highlight enabling products or technologies for chemical synthesis, drug discovery, and other areas of chemistry. Ionic Liquids have experienced a com...

Acetonitrile - High Purity Solvents

Acetonitrile is a transparent liquid with an aromatic odor, with chemical formula CH3CN. It is the simplest organic nitrile. Acetonitrile is also known as cyanomethane, ethyl nitrile, ethanenitrile, methanecarbonitrile, and methyl cyanide. Acetonitrile is used to make pharmaceuticals, perfumes, rubb...

Dudley Benzylation Reagent

• • Download PDF • Benzyl ethers and derivatives are among the most widely used protecting groups in organic synthesis. Cleavage can be effected under a variety of conditions including hydrogenolysis, oxidation, and acid decomposition. Typically, protection of alcohols in the form of a benzyl ether ...

General Reagents Solvents lists by Sigma-Aldrich.

A.C.S. Solvents Histological Solvents Reagent Grade Solvents A.C.S. Solvents Complete list of ACS grade solvents Sigma-Aldrich A.C.S. solvents meet or exceed the specifications set by the American Chemical Society. For those applications or general procedures requiring stringent quality specificatio...

ChiPros Chiral Amines

• • Download PDF • Chiral amines play an important role in stereoselective organic synthesis. They are used directly as resolving agents, building blocks or chiral auxiliaries. While classically available through racemic resolution with optically active acids, biotechnological approaches also open a...

Vol 3 No 3

ChemFiles Vol. 3, No. 3 Reagents for Suzuki Coupling Download PDF This brochure contains a comprehensive selection of boronic acids, boronic acid esters, diboron esters, and transition-metal catalysts useful for the Suzuki coupling reaction. New offerings are added monthly; if you don't see the mate...

Acta Vol 33 No 1

The Acta is written in the Portable Document Format (PDF). Please view it with the Adobe Acrobat Reader. Download this complete issue (2.0 Mb) as a single PDF file and view its contents in your browser or in Acrobat Reader. The table of contents (TOC) appears below. For more information on PDF docum...

Dess–Martin Periodinane

Dess–Martin Periodinane (DMP) is among the most widely used reagents for the mild oxidation of alcohols to aldehydes and ketones.1 The neutral conditions of the oxidation reaction make it a suitable choice in syntheses of sensitive, functionally complex intermediates. When used in hydrophilic ionic ...

Synthia™ Organic Retrosynthesis Software - Resources

Synthia™ Organic Retrosynthesis Software - Resources Learn more about Synthia™ Organic Retrosynthesis Software • Synthia™ – Proven an Published • Publications Synthia™ – Proven and Published To validate the capabilities of Synthia™ in the lab, we conducted an experiment with six chemists to synthesi...

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...

Buchwald Phosphine Ligands

• • Download PDF • Sigma-Aldrich is pleased to offer an array of phosphines for C-C, C-N, and C-O bond formation. The impact of cross-coupling methodologies to form C-C bonds is paramount in organic synthesis.1 Of these, Suzuki-Miyaura coupling is among the most powerful transformations available as...

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,...

Alkyne Hydrosilylation

• • Download PDF • Vinyl-metal reagents play a pivotal role in organic synthesis. Among the vinyl-metal reagents available, silicon-based reagents are of increasing importance. This is largely due to their low cost, minimal toxicity, ease of handling, and the simplicity of byproduct removal. Particu...

Specialty Adapters - Glassware Catalog

Connecting • Reducing/Enlarging • Septum-Inlet • Specialty • Tubing • Vacuum On this page: Luer lock adapters • Pour-out Adapters • High-dilution adapter Luer lock adapters Permits fitting of standard glassware with needles for air-sensitive transfer. Description Catalog Number S.T. 24/40F to male L...

Tetrameric Phosphazene Bases

ChemFiles Vol. 3, No. 1 Strong and Hindered Bases in Organic Synthesis Introduction / Phosphazene Bases / Verkade's Superbases / Traditional bases Preservation of Reagents / Schlenk-Type Glassware Phosphazene Bases Introduction / Monomeric Phosphazene Bases (P1) Dimeric Phosphazene Bases (P2) / Tetr...

Benzoylation Reagents for Chemical Synthesis

Simple Tools for α-Oxygenation of Aldehydes and Ketones The α-hydroxycarbonyl moiety is an important structural motif in organic synthesis and is present in a substantial number of natural products. A variety of methods have been developed to prepare this functionality including α-oxygenation of eno...

Quality Credentials

Cerilliant serves a diverse group of customers and industries who have different quality requirements. Our accreditations provide added confidence to our customers that Cerilliant products are produced and tested to the highest industry standards and are suitable for use in multiple demanding applic...

Bis(2-methoxyethyl)aminosulfur Trifluoride (Deoxo-Fluor®)

• • Download PDF • Originally reported by Lal and coworkers in 1999,1 bis(2-methoxyethyl)aminosulfur trifluoride (Deoxo-Fluor®) has shown remarkable utility in organic synthesis as a thermally stable alternative to (diethylamino)sulfur trifluoride (DAST). Deoxo-Fluor can easily convert alcohols to a...

Metathesis in Chemical Synthesis

Ruthenium-Based Metathesis Catalysts Introduction Olefin metathesis is now a well-entrenched synthetic technique, and is a powerful method for the clean construction of innumerable classes of chemical architectures. The broadly accepted belief that this key method transformed the landscape of synthe...

Multicomponent Couplings

Dithianes are valuable tools in organic synthesis, particularly in their use as acyl anion equivalents in C–C bond construction (Scheme 26). Since their introduction over forty years ago in the pioneering work of Corey and Seebach,1 dithiane chemistry has matured substantially. Contemporary reaction...

Bestmann-Ohira Reagent: Synthesis of Alkynes from Aldehydes Protocol

Acetylene chemistry has been and remains an important constituent element of molecular sciences. Its potential and widespread applications extend from organic synthesis through materials science to bioorganic chemistry. Some examples are enediynes (DNA-cleaving agents), ‘click chemistry’ tools and b...

Fluorinating Reagents

• • Download PDF • The importance of selectively fluorinating compounds in medicinal chemistry, biology, and organic synthesis is well appreciated and provides a major impetus to the discovery of new and mild fluorinating agents that can operate safely and efficiently. Elemental fluorine and many el...

AL-143 Mineral Adsorbents, Filter Agents and Drying Agents| References

AL-143 Mineral Adsorbents, Filter Agents and Drying Agents Home / Molecular Sieves / Activated Alumina / Activated Carbon / Diatomaceous Earth Ascarite II® Adsorbents / Montmorillonites and other Mineral Adsorbents / Drying Agents Toxicity and Handling / References IX. REFERENCES 1. See, for example...