17261-28-8, Name is 2-(Diphenylphosphino)benzoic acid, molecular formula is C19H15O2P, belongs to chiral-phosphine-ligands compound, is a common compound. In a patnet, once mentioned the new application about 17261-28-8, HPLC of Formula: C19H15O2P
Four new methyloxorhenium(V) complexes were synthesized: MeReO(PA)2 (1), MeReO(HQ)2 (2), MeReO(MQ)2 (3), and MeReO(diphenylphosphinobenzoate)2 (4) (in which PAH = 2-picolinic acid, HQH = 8-hydroxyquinoline, and MQH = 8-mercaptoquinoline). Although only one geometric structure has been identified crystallographically for 1, 2, and 3, two isomers of 3 and 4 in solution were detected by NMR spectroscopy. These compounds catalyze the sulfoxidation of thioethers by pyridine N-oxides and sulfoxides. The rate law for the reaction between pyridine N-oxides and thioethers, catalyzed by 1, shows a first-order dependence on the concentrations of pyridine N-oxide and 1. The second-order rate constants of a series of para-substituted pyridine N-oxides fall in the range of 0.27-7.5 L mol-1 s-1. Correlation of these rate constants by the Hammett LFER method gave a large negative reaction constant, rho = -5.2. The next and rapid step does not influence the kinetics, but it could be explored with competition experiments carried out with a pair of methyl aryl sulfides, MeSC6H4-p-Y, The value of each rate was expressed relative to the reference compound that has Y = H. A Hammett analysis of kY/kH gave rho = -1.9. Oxygen-18 labeled 1 was used in a single turnover experiment for 4-picoline N-oxide and dimethyl sulfide. No 18O-labeled DMSO was found. We suggest that the reaction proceeds by way of two intermediates that were not observed during the reaction. The first intermediate contains an opened PA-chelate ring; this allows the pyridine N-oxide to access the primary coordination sphere of rhenium. The second intermediate is a cis-dioxorhenium(VII) species, which the thioether then attacks. Oxygen-18 experiments were used to show that the two oxygens of this intermediate are not equivalent; only the new oxygen is attacked by, and transferred to, SR2. Water inhibits the reaction because it hydrolyzes the rhenium(VII) intermediate.
Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.Safety of 2-(Diphenylphosphino)benzoic acid. In my other articles, you can also check out more blogs about 17261-28-8
Reference：
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate