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Asymmetric Allylic Alkylation - Advantages and Applications in Chemical Synthesis

. Introduction . Advantages . Representative Application . Pd-Catalyzed Asymmetric Allylic Alkylation: Carbon Nucleophiles . Pd-Catalyzed Asymmetric Allylic Alkylation: Oxygen Nucleophiles . Pd-Catalyzed Asymmetric Allylic Alkylation: Nitrogen Nucleophiles . Pd-Catalyzed Asymmetric Allylic Alkylatio...

Buchwald Phosphine Ligands - Technical Article

. For C-C, C-N, and C-O Bond Formation . Additional Information . Materials List For C-C, C-N, and C-O Bond Formation: Over the past several years, the Buchwald group has developed a series of bulky electron-rich phosphines that have garnered much attention for their ability to effect various C–C, C...

N-Heterocyclic Carbene Ligands in Chemical Synthesis

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

ChiroSolv Resolving Kits: Facile and Rapid Chiral Separation

. Introduction . Advantages . Materials List Diastereomeric crystallization is a process that chemically separates enantiomers in a racemic mixture by adding an enantiopure acid or base, resulting in a mixture of diastereomeric salts. These salts have different chemical and physical properties from ...

Alkali Metal Silica Gels from SiGNa

. Introduction . Bouveault-Blanc Reduction . Reductive Deprotection . Materials List Alkali metals have long been used in synthetic chemistry as reducing agents, but their pyrophoric nature has often prevented their use in larger-scale reactions. Alkali metals react violently with water, produce cop...

New Catalysis Screening Kits - Chemistry Kits

. Materials List Accelerate Methodology Discovery, Lead Generation, and Process Optimization Aldrich’s new chemistry kits for catalysis screening offer the broadest range of technologies available in convenient packaging. Kits contain sets of catalysts, achiral or chiral ligands, and scavengers with...

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...

Benzotriazole Reagents

. Materials List Benzotriazole has been commonly employed as a leaving group and has been used extensively as a novel synthetic auxiliary. Much of its attractiveness lies in its ability to be introduced readily and easy to remove or displace during syntheses, as well as its ability to activate other...

Advantages of A-Phos Palladium Complexes for Efficient Suzuki Coupling

. Introduction . Advantages . Representative Application . Materials List The Suzuki-Miyaura cross-coupling reaction of heteroaryl halides is of particular interest to the pharmaceutical industry since many biologically active compounds are accessed through this methodology. Currently, a need exists...

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...

Takasago Ligands and Complexes for Asymmetric Reactions

. Introduction . Advantages . Representative Application . Materials List The quest to find chiral catalysts capable of achieving high enantiomeric excess for a variety of asymmetric transformations has been an ongoing endeavor for the past 40 years. One of the most relevant reactions used to evalua...

CBS Catalysts for Chemical Synthesis, Materials List

. 2-Methyl-CBS-oxazaborolidines for asymmetric reduction . o-Tolyl-CBS-oxazaborolidines for asymmetric synthesis . Materials List 2-Methyl-CBS-oxazaborolidines for asymmetric reduction: Since 1987, the series of chiral oxazoborolidines known as CBS catalysts (after the work of Corey, Bakshi, and Shi...

CBILS© - A Revolutionary Tool for Ionic Liquid Synthesis

. Additional Information . Materials List A Revolutionary Tool for Ionic Liquid Synthesis: The use of CBILS© – Carbonate Based Ionic Liquid Synthesis – developed by the Austrian company proionic, offers one of the simplest, yet most elegant synthetic methods for the production of ionic liquids.1 The...

Gold Plated Inlet Seals - SPME Accessories

Gold Plated (straight Design). A straight design seal is suitable for applications with low split flows (200 ml/min). Plated with pure gold to insure inertness. No brighteners are used in the plating process. Each pack includes one washer for each seal.

Highly Reactive Metals

Chemfiles Vol . 2, No. 5 Rieke® Organozinc & Organomagnesium Reagents Download PDF (938 KB) Lab Equipment Rieke® Highly Reactive Metals Metal-enhanced organic synthesis via organometallic intermediates is a widely used preparative route for thousands of organic compounds. However, in some cases, ord...

Shigella - Media by Microorganism

Shigella spp. is an enteric bacteria that causes contamination in food and water. Bacteria of the genus Shigella are Gram-negative, facultative anaerobic, non-motile rods. Shigella was first discovered in 1896 by the Japanese microbiologist, Kiyoshi Shiga. It was initially called Bacillus dysenterie...

Chronobacter spp. Classic and New Detection Methods

Product Manager Microbiology…. ivo.siegrist@sial.com Cronobacter is a rod-shaped, motile and facultatively-anaerobic bacteria of the family Enterobacteriaceae. Originally Cronobacter spp. were listed as yellow-pigmented Enterobacter cloacae (see Table 1). The bacteria was then later on called Entero...

Culture Method for Quality Control of Beer

Product Manager Microbiology…. ivo.siegrist@sial.com Traditional methods are based morphology, staining methods, enzyme reactions (metabolism) and diverse media. One of the first steps is the filtration of the beer followed by an incubation of the filter on an agar plate. Suspect colonies are then e...

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Swagelok® Fittings Kit - Swagelok® Tubing Fitting

Swagelok No. . . . . . . . Description . . . . . . . . . . . . . . . Quantity200-6 . . . . . . . .1/8 inch union . . . . . . . . . . . . . . . . . . . . . . . . . .2400-6 . . . . . . . .1/4 inch union . . . . . . . . . . . . . . . . . . . . . . . . . .2400-60-2 . . . . . .1/4 in. x 1/8 in. reducing...

Differentiation and Identification Media for Salmonella

Product Manager Microbiology…. ivo.siegrist@sial.com Salmonella contamination is the second leading cause of food-borne illness worldwide. Controlling outbreaks of Salmonella is an important task for food regulators, restaurants and the food industry in general. The Salmonella family includes over 2...

Streptococci- Overview of Detection, Identification, Differentiation and Cultivation Techniques

Streptococci are non-motile, microaerophilic, Grampositive spherical bacteria (cocci). They often occur as chains or pairs and are facultative or strict anaerobes. Streptococci give a negative catalase test, while staphylococci are catalase-positive. The cell division of Streptococci species involve...

Innovative Detection of Listeria

By Jvo Siegrist, Product Manager Microbiology…. ivo.siegrist@sial.com Today, Real Time PCR is the standard for modern microbiology, but there are also other easier methods. Our HybriScan® test system is able to detect Listeria ssp. and specifically Listeria monocytogenes. PCR is not needed but never...

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Culture Multiwell Plates - Cell Culture Supplies

Multiwell culture plates are available in 6-. 12-, 24-, 48- and 96 well formats, and tissue culture treated for cell culture of anchorage dependent cells and non-treated for suspension cell culture applications.See also Culture Dishes.

ISOGRO® Amplify Recombinant Protein Expression

• Decrease lag time by as much as 60%. • Maximize OD and recombinant protein expression. • Supplement with as little as 10% ISOGRO and improve the production of difficult to express proteins in E. coli. 1. Inoculate E. coli BL21(DE3) pLysS/(cTnC 1-89) in Luria Bertani Broth (LB) containing Carbenici...

Oligonucleotide Handling & Stability

DNA Oligonucleotides are relatively stable molecules (Table 1). However, they require certain handling and storage techniques to ensure trouble-free experiments and maximize shelf life, respectively. Table 1. Approximate shelf-life of non-modified, single-stranded DNA oligonucleotides with proper st...

How to fractionate and analyze gradients of Percoll

Density Marker Beads are dyed derivatives of Sephadex™. There are ten color-coded bead types, each with a specific density. They have been specifically formulated for use in Percoll gradients and will not work with other media. Using Density Marker Beads as an external marker facilitates monitoring ...

Synthia™ Organic Retrosynthesis Software Licenses

Synthia™ Retrosynthetic Design Software Licenses Meet Synthia™. Retrosynthesis software that augments your expertise Teaching computers to plan chemical syntheses has been one of the greatest challenges of modern organic chemistry. Synthia™ combines the powers of network theory, advanced computing a...

Lactobacillus - Media by Microorganism

Lactobacilli: Preparation of fermented food (yoghurt, sauerkraut, pickles).To view a list of products filtered by media type, move your cursor over the "Media Type" heading in the first column and select from the drop down menu. For more specific product details, click on the Product # links.

MISSION® shRNA Library-Largest and Most Validated shRNA Collection

The MISSION shRNA Library powered the RNAi Consortium (TRC). Do you want to perform RNAi in non-transfectable or non-dividing cells? Do you need efficient, long-term knockdown and require a robust, quality system? In collaboration with the RNAi Consortium (TRC), we have made the MISSION shRNA Librar...

Enzymatic Assay of 3α-Hydroxysteroid Dehydrogenase with Androsterone (EC 1.1.1.50)

Replaces OP SPANDR01. See CR SOP-DEK-ENZ[77]. To standardize a procedure for the enzymatic determination of 3α-Hydroxysteroid dehydrogenase. This procedure applies to products that have a specification for 3α-Hydroxysteroid dehydrogenase by enzymatic determination. 3.1. Purified Water - water from a...