In this article, the dissociation mechanism of (R)-benzoin to benzaldehyde catalyzed by BAL has been studied by using density functional theory method. The calculation results indicate that the whole reaction consists of four elementary steps, and at least two steps contribute to rate-limiting. A...
1). Currently, the reaction mechanism of BAL was clarified and there are three key procedures involved in the catalytic process. Initially, a proton from C2 transfers to the imine and then the C2 carbanion performs a nucleophilic reaction with benzoin, producing a C2-(α,β-dihydroxy-α,β-...
mainly meso- and dl-dihydrobenzoin and benzoin. are formed to a small extent only. On the basis of \{CIDNP\} measurements the mechanism of photodeuteriation is discussed. Résumé Zusammenfassung - Benzaldehyd (1a) und solche substituierten Benzaldehyde, deren niedrigste Triplettzustnde (n,w*...
benzoin reaction in the presence of benzoylformate decarboxylase in DMSO at room temperature to give the (R)-acyloin in 70% yield and 94%ee<1999TA4769>. Asymmetric aldol reaction of 2-pyridinecarbaldehydes has also been effected using asymmetric catalysis. Mukaiyama aldol reaction of 6-chloro-5...
Structure and mechanism of the ThDP-dependent benzaldehyde lyase from Pseudomonas fluorescensdoi:10.1111/j.1742-4658.2005.04998.xacyloin condensationcarbon–carbon ligationcrystal structureseleno-methionine MADPseudomonas fluorescens is able to grow on R-benzoin as the sole carbon and energy source because ...
Progress in Reaction Kinetics & MechanismWu, X.; Pang, X. Y.; An, X.; Xie, X. M. Kinetics and mechanism of formation of benzoin ethyl ether from benzaldehyde and ethanol using heterogeneous Ni(HCO 3 ) 2 as catalyst. Prog. React. Kinet. Mec. 2014 , 39 , 299–307....
heterocyclische Carbene, Organokatalyse, Reaktionskinetik, Reaktionsmechanismen, SubstituenteneffekteRate and equilibrium constants for the reaction between N‐aryl triazolium N‐heterocyclic carbene (NHC) precatalysts and substituted benzaldehyde derivatives to form 3‐(hydroxybenzyl)azolium adducts under ...
SUN W Y; UEYAMA U; NAKAMURA A.Oxidation of benzoin to benzil and of p-substituted benzyl alcohol to the corresponding benzaldehyde catalyzed by iron ( Ⅲ) thiolate complexes- A proposed reaction- mechanism.Tetrahedron.1993.1357-1370SUN W Y, UEYAMA U, NAKAMURA A. Oxidation of benzoin to benzil...
mainly meso- and dl-dihydrobenzoin and benzoin. are formed to a small extent only. On the basis of \\{CIDNP\\} measurements the mechanism of photodeuteriation is discussed. R茅sum茅 Zusammenfassung - Benzaldehyd (1a) und solche substituierten Benzaldehyde, deren niedrigste Triplettzustnde (...
To test immobilized BAL, benzoin condensation reaction was performed with this magnetically responsive biocatalyst. The results obtained from the carboligation reaction that was performed with this simple and convenient heterogeneous biocatalyst were comparable to that of free-enzyme-catalyzed reaction. ...