A New Biarylphosphine Ligand for the Pd-Catalyzed Synthesis of Diaryl Ethers under Mild Conditions
An efficient, general palladium catalyst for C-O bond-forming reactions of secondary and primary alcohols with a range of aryl halides has been developed using the ligand�1. Heteroaryl halides, and f...
Keywords: Chromatography, Flash chromatography, Ligands
A Single Phosphine Ligand Allows Palladium-Catalyzed Intermolecular C-O Bond Formation with Secondary and Primary Alcohols-
The substrate scope of the copper-free Sonogashira coupling has been successfully extended to cyclopropyl iodides, allowing an efficient access to a wide variety of functionalized alkynyl cyclopropan...
Keywords: Chromatography, Flash chromatography, Nuclear magnetic resonance spectroscopy, Purification, Sonogashira Coupling, Spectroscopy
BrettPhos Ligand Supported Palladium-Catalyzed C-O Bond Formation through an Electronic Pathway of Reductive Elimination: Fluoroalkoxylation of Activated Aryl Halides
A Pd/N-heterocyclic carbene-based catalyst achieves the Sonogashira coupling of an array of functionalized, ?-hydrogen-containing alkyl bromides and iodides under mild conditions. By furnishing the f...
Keywords: Chromatography, Cross couplings, Flash chromatography, Ligands, Sonogashira Coupling
C-O Cross-Coupling of Activated Aryl and Heteroaryl Halides with Aliphatic Alcohols-
We report an unprecedented BrettPhos ligand supported Pd-catalyzed C-O bond-forming reaction of activated aryl halides with primary fluoroalkyl alcohols. We demonstrate that the Phosphine ligand (Bre...
Keywords: Catalysis, Eliminations, Ligands, Reductive eliminations, Thin layer chromatography
Catalytic Direct Cross-Coupling of Organolithium Compounds with Aryl Chlorides
Complex, hindered biaryls have been prepared at temperatures ranging from 1�C to room temperature, or with gentle heating. The Pd-PEPPSI-IPent catalyst nicely couples starting materials containing ac...
Keywords: Chromatography, Flash chromatography
Highly Selective Palladium-Catalyzed Cross-Coupling of Secondary Alkylzinc Reagents with Heteroaryl Halides | Materials & Procedure
The highly selective palladium-catalyzed Negishi coupling of secondary alkylzinc reagents with heteroaryl halides is described. The development of atseries of biarylphosphine ligands has led to the i...
Keywords: Catalysis, Eliminations, Gas chromatography, Ligands, Negishi Coupling, Nuclear magnetic resonance spectroscopy, Oxidative additions, Reductive eliminations
KitAlysis High-Throughput Metal Scavenger Reaction Screening Kit
The screening sets come pre-loaded with 12 scavengers / resins (10mg or 50mg) in each vial according to the following design.
Keywords: Metal scavengers
Negishi cross-coupling of secondary alkylzinc halides with aryl/heteroaryl halides using Pd-PEPPSI-IPent
Over the past two decades, considerable attention has been given to the development of new ligands for the palladium-catalyzed arylation of amines and related NH-containing substrates (i.e. Buchwald-...
Keywords: Aminations, Arylations, Buchwald-Hartwig amination, Catalysis, Chromatography, Column chromatography, Cross couplings, Gas chromatography, Hydroaminations, Ligands, Thin layer chromatography
Pd-Catalyzed Alkynylation of 2-Chloroacetates and 2-Chloroacetamides with Potassium Alkynyltrifluoroborates
A practical method for palladium-catalyzed cyanation of aryl halides using Pd/C is described. The new method can be applied to a variety of aryl bromide and active aryl chloride substrates to effect ...
Keywords: Catalysis, Chromatography, High performance liquid chromatography
Pd-Catalyzed Synthesis of Ar-SCF3 Compounds under Mild Conditions-
We report the first example of a coupling reaction of chiral secondary boronic esters generated by the hydroboration of vinyl arenes. In order for the reaction to take place in high yields, the use o...
Keywords: Chromatography, Column chromatography, Coupling reactions, Supercritical fluid chromatography
Pressure-Temperature Calculator for Solvents
*Calculations provide estimated results based on Antoine's Coefficients and their associated temperature range values. Antoine's Coefficients were obtained from the National Institute of Standards an...
Rational and Predictable Chemoselective Synthesis of Oligoamines via Buchwald-Hartwig Amination of (Hetero)Aryl Chlorides Employing Mor-DalPhos
We report our studies on the use of two catalyst systems, based on the ligands BrettPhos and RuPhos, which provide the widest scope for Pd-catalyzed C-N cross-coupling reactions to date. Often low ca...
Keywords: Catalysis, Coupling reactions, Cross couplings, Ligands, Pharmaceutical
Selective Amination of Polyhalopyridines Catalyzed by a Palladium-Xantphos Complex
Amination of 5-bromo-2-chloropyridine (1a) catalyzed by a palladium-Xantphos complex predominately gives 5-amino-2-chloropyridine product 3a in 96% isolated yield and excellent chemoselectivity (3a/4...
Keywords: Aminations, Catalysis, Chromatography, High performance liquid chromatography
Selective Monoarylation of Acetate Esters and Aryl Methyl Ketones Using Aryl Chlorides
A series of palladacyclic precatalysts that incorporate electron-rich di-tert-butylphosphino biaryl ligands is reported. These precatalysts are easily prepared, and their use provides a general means...
Keywords: Amidations, Catalysis, Chromatography, Coupling reactions, Cross couplings, Flash chromatography, Ligands, Thin layer chromatography
Stereospecific Pd-Catalyzed Cross-Coupling Reactions of Secondary Alkylboron Nucleophiles and Aryl Chlorides
We report the development of a Pd-catalyzed process for the stereospecific cross-coupling of unactivated secondary alkylboron nucleophiles and aryl chlorides. This process tolerates the use of second...
Keywords: Catalysis, Chromatography, Column chromatography, Coupling reactions, Cross couplings, Isomerizations
Suzuki-Miyaura Cross-Coupling of Potassium Dioxolanylethyltrifluoroborate and Aryl/Heteroaryl Chlorides
A robust and general catalyst system�facilitates the alkoxylation of activated heteroaryl halides with primary, secondary, and select tertiary alcohols without the need for an excess of either coupli...
Keywords: High performance liquid chromatography, Liquid chromatography mass spectrometry, Purification
Synthesis and Application of Palladium Precatalysts that Accommodate Extremely Bulky Di-tert-butylphosphino Biaryl Ligands
An umpolung approach to the synthesis of diaryl ketones has been developed based on in situ generation of acyl anion equivalents and their catalytic arylation. This method entails the base-promoted, ...
Keywords: Arylations, Catalysis, Chromatography, Cross couplings, Flash chromatography
Agriculture | Crop Protection Workflow
Pesticides are an essential component in modern agriculture and enable growers to fully realize the yield potential of their seeds. From compound discovery to active ingredient development, our chemi...
Keywords: Agriculture, Building blocks, Gas chromatography, Gas chromatography mass spectrometry, High performance liquid chromatography, Liquid chromatography mass spectrometry, Mass spectrometry, Organic synthesis, Pesticides, Polymerase chain reaction - quantitative, Purification, Solvents
Pressure-Temperature Nomograph Interactive Tool
Use the interactive controls above to simplify calculations and improve the efficiency of your distillation or evaporation requirements.
Keywords: Evaporation, Vaporization
Properties of Solvents Table
The table below presents the physical characteristics of common solvents. Easily reference or compare solvent properties like boiling point, density, and refractive index all from one list.
Keywords: Gas chromatography, Green chemistry, High performance liquid chromatography, Melting, Solvents