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Family of chiral diphosphine ligands used for asymmetric catalysis
A Josiphos ligand is a family of chiral diphosphine ligands that are used for asymmetric catalysis. They feature a 1,2-disubstituted ferrocene backbone
Josiphos_ligands
Ion or molecule bound to a metal atom
metal–ligand bond order can range from one to three. Ligands are viewed as Lewis bases, although rare cases are known to involve Lewis acidic "ligands". Metals
Ligand
Organometallic compound: Fe(II) sandwiched between two cyclopentadienyl rings
ferrocene ligands". Chemical Society Reviews. 33 (5): 313–328. doi:10.1039/B316819K. PMID 15272371. Blaser HU (2002). "Solvias Josiphos ligands: From discovery
Ferrocene
Chemical compound
ferrocene derivative. Ugi’s amine is a precursor to ligands, most notably, the Josiphos ligands, which have been used in asymmetric catalysis In 1967
Ugi's_amine
Chemical element with atomic number 77 (Ir)
scale of 10,000 tons/year, the complex [Ir(COD)Cl]2 in the presence of Josiphos ligands. The radioisotope iridium-192 is one of the two most important sources
Iridium
Benoit; Spindler, Felix; Studer, Martin; Togni, Antonio (2002). "Solvias Josiphos ligands: from discovery to technical applications". Topics in Catalysis. 19
List of chemical compounds with unusual names
List_of_chemical_compounds_with_unusual_names
Chemical reaction for synthesizing C–N bonds
conditions for the major generations of ligand systems. (Not included herein are N-heterocyclic carbene ligands and ligands with wide bite angles such as Xantphos
Buchwald–Hartwig_amination
Parameter in coordination chemistry
between two bonds to a bidentate ligand. This ligand–metal–ligand geometric parameter is used to classify chelating ligands, including those in organometallic
Bite_angle
ligands which can result in different coordination geometries and catalytic behavior in homogeneous catalysts. Many widely used diphosphine ligands have
Diphosphine_ligands
Chemical compound
asymmetric intramolecular Pauson-Khand reaction. The chiral diphosphine Josiphos provides the asymmetry. Despite the unique approach, the clusters are inferior
Methylidynetricobaltnonacarbonyl
Methylidynetricobaltnonacarbonyl
a specialized catalyst system consisting of [Ir(COD)Cl]2, modified Josiphos ligand 3, and acid and iodide additives. Imines may be reduced enantioselectively
Hydrogenation of carbon–nitrogen double bonds
Hydrogenation_of_carbon–nitrogen_double_bonds
Chemical reaction between molecular hydrogen and another compound or element
diphosphine ligands. Rhodium catalyzed hydrogenation has also been used in the herbicide production of S-metolachlor, which uses a Josiphos type ligand (called
Hydrogenation
Reaction in organic chemistry
bromide to ethyl sorbate 1 using a copper catalyst with a reversed josiphos (R,S)-(–)-3 ligand. This reaction produced the 1,6-addition product 2 in 0% yield
Michael_addition_reaction
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JOSIPHOS LIGANDS
JOSIPHOS LIGANDS
JOSIPHOS LIGANDS
JOSIPHOS LIGANDS
JOSIPHOS LIGANDS
JOSIPHOS LIGANDS
JOSIPHOS LIGANDS
JOSIPHOS LIGANDS
JOSIPHOS LIGANDS
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