Chemistry is the science of change. But why do chemical reactions take place? Why do chemicals react with each other? The answer is in thermodynamics and kinetics, 81058-27-7, Name is (2R,3R,4S,5R,6R)-2-Bromo-6-((pivaloyloxy)methyl)tetrahydro-2H-pyran-3,4,5-triyl tris(2,2-dimethylpropanoate), SMILES is CC(C)(C)C(OC[C@@H]1[C@@H](OC(C(C)(C)C)=O)[C@H](OC(C(C)(C)C)=O)[C@@H](OC(C(C)(C)C)=O)[C@@H](Br)O1)=O, belongs to chiral-nitrogen-ligands compound. In a document, author is Zhou, Yu, introduce the new discover, SDS of cas: 81058-27-7.
Mechanistic studies: enantioselective palladium(ii)-catalyzed intramolecular aminoarylation of alkenes by dual N-H and aryl C-H bond cleavage
Nitrogen heterocyclic structures have been widely used in organic synthesis and medicinal chemistry. Recently Liu and co-workers reported an asymmetric palladium-catalyzed intramolecular oxidative aminoarylation of alkenes with quinoline-oxazoline (Qox) chiral ligands, and the products were formed in high yield with excellent enantioselectivity. The addition of a catalytic amount of phenylglyoxylic acid (PGA) significantly accelerates the reaction. However, it is hard to confirm the specific role of PGA experimentally. Herein, we provided DFT mechanistic insights to ascertain the mechanism of this reaction. The calculation results suggest that the barrier for the N-H deprotonation process of the amide substrate is extremely high, but the O-H deprotonation of its imidic acid tautomer is easier. The transformation of the amide to an imidic acid becomes more facile with the addition of PGA. The rate-determining step (with PGA) of this reaction is the reductive elimination and the stereoselectivity-determining step is alkene insertion. The enantioselectivity is essentially dominated by the steric repulsion between the chiral ligand Qox and the Pd-substrate complex.
The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 81058-27-7 is helpful to your research. SDS of cas: 81058-27-7.
Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis¡ªI. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
,Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis