Reaction design and optimization

应用筛选条件

facet applications:Reaction design and optimization

facet content type:Technical Article

显示 31-60 共 96 条结果

The enantioselective reduction of ketones to alcohols gives access to a pool of chiral building blocks that can be used for the synthesis of natural products. Adolfsson and co-workers reported a novel class of ligands, based on a pseudo-dipeptide, for

Scale-Up Guide: Suzuki-Miyaura Cross-Coupling Reaction

All of the preformed catalysts used in the kit are air and moisture stable complexes in their commercially available form.

Potassium Organotrifluoroborates

These bench stable Potassium Organotrifluoroborates are useful for Suzuki-Miyaura cross-coupling reactions and have also been used for a variety of other C-C bond forming reactions. Importantly, these reagents are compatible with a wide range of functional groups and are

Metal Scavengers

Metal compounds are widely used in organic and medicinal chemistry as either reactants or catalysts. Since most metal ions have physiological activities, reducing residual metal levels has become a key step in syntheses of bioactive compounds.

Montmorillonites and other Mineral Adsorbents

Montmorillonites Other

DABAL-Me3 - Non-pyrophoric Methyl Anion Equivalent

DABAL-Me3 is an adduct of trimethylaluminum and DABCO® that is a free-flowing solid that can be manipulated without the need for an inert atmosphere.

PYBOX Ligand - Large Binding Site & Rigid Scaffold

The PYBOX ligand, consisting of a pyridine ring flanked by two oxazoline groups, was introduced in 1989 by Nishiyama.

ChiPros Chiral Amines

Chiral amines play an important role in stereoselective organic synthesis. They are used directly as resolving agents, building blocks, or chiral auxiliaries.

Ionic Liquids Properties & Applications

Chiral Alcohols

Ionic Liquids

Ionic Liquids have experienced a comet-like boost in the last few years. In this edition of ChemFiles, we highlight some current applications of this fascinating class of new materials. We present over 50 new additions to our portfolio of 130+

Dess–Martin Periodinane

Dess-Martin Periodinane is used for the mild oxidation of alcohols to aldehydes and ketones. The neutral condition of the reaction makes DMP suitable for syntheses of sensitive, functionally complex intermediates.

QuinoxP*

QuinoxP*: Air-Stable and Highly Efficient and Productive Chiral Ligands

Solvent Stabilizer Systems

A description of stabilizer systems for solvents including esters, ethyl ester, tetrahydrofuran, chlorinated solvents, chloroform and dichloromethane.

Homobenzotetramisole (HBTM): A General Organocatalyst for Asymmetric Acylations

We are proud to offer the isothiourea organocatalyst homobenzotetramisole (HBTM) as part of our asymmetric catalysis portfolio in both (R) and (S) enantiomeric forms.

Functionalized Silica Gels for Organic Synthesis

Functionalized silica gel is used in size-exclusion chromatography of cationic polymers and in the separation of sugars, steroids, cholesterol, and triglycerides.

TPGS-750-M: Second-Generation Amphiphile for Organometallic Chemistry in Water at Room Temperature

Lipshutz and co-workers have recently developed a second generation technology to their original PTS-enabling surfactant based on the polyoxyethanyl-α-tocopheryl succinate derivative, TPGS-750-M.

Scale-Up Guide: Photocatalysis Reaction

Scale-Up Guide for Photocatalysis Reaction to best enable scale-up success with High-Throughput Screening Kit.

Fluoroalkylation: Expansion of Togni Reagents

The fluoroalkylation toolbox now includes Togni reagents, hypervalent iodine perfluoroalkylation reagents, fluoroalkyl bromides, silanes, carboxylates, and sulfonyl fluorides for late stage fluoroalkylation.

Application of Carbon Monoxide in Synthesis Made Simple and Safe by Prof. Skrydstrup and Coworkers

Studies in the field of carbonylation chemistry led to the discovery of a novel carbon monoxide (CO) delivery system.

Glycosyltransferases: Tools for Synthesis and Modification of Glycans

The presence of multiple functional groups and stereocenters in complex carbohydrates makes them challenging targets for the organic chemist.

Asymmetric Epoxidation Using Shi Catalyst

Catalytic asymmetric epoxidation of alkenes has been the focus of many research efforts over the past two decades, the best known methods probably being those developed by Sharpless and Jacobsen-Katsuki.

Jacobsen Thioureas

Chiral thioureas were developed that are versatile and effective organocatalysts. A range of latent nucleophiles can be added to mostly imine-type electrophiles in enantiomeric excesses and with a broad substrate scope.

KitAlysis High-Throughput Palladium Precatalyst Cross-Coupling Reaction Screening Kit

Materials Included in your KITALYSIS-24PD-2PK High-Throughput Screening Kit

Preservation of Moisture-Sensitive Chemical Reagents

Preserve reagent quality of air- and moisture-sensitive reagents using nitrogen or argon in crown-cap bottles with a 6 mm diameter hole in the crown-cap and a PTFE-faced rubber liner.

Inverse Electron Demand Diels–Alder Reactions of 1,2,4,5-Tetrazines and 1,2,3-Triazines

The inverse electron demand Diels-Alder reactions of electron-deficient heterocycles are significant cycloaddition reactions for the total synthesis of natural products containing highly substituted and functionalized heteroaromatic ring systems.

Trichloroacetimidate Reagents

Trichloroacetimidates are also commonly employed as alcohol alkylation reagents, particularly when existing functionality is not acid sensitive.

Selective Metalations

Selective Metalations using i-PrMgCl·LiCl and s-BuMgCl·LiCl

Tetrakis(dimethylamino)ethylene (TDAE)

In 2001, Professor William Dolbier, Jr., at the University of Florida reported1 an approach to nucleophilic trifluoromethylation based on the generation of a trifluoromethyl anion using CF3I in the presence of a powerful twoelectron reductant, tetrakis(dimethylamino)ethylene (TDAE)

Q-Phos

Developed by Professor John Hartwig, pentaphenyl(di-tert-butylphosphino)ferrocene (Q-Phos) has emerged to be a premier ligand in coupling reactions with its remarkably broad utility in a variety of C–N, C–O, and C–C bondforming reactions.

2/4