Home  About us  Contact
 

Benzil Derivatives (benzil + derivative)

Distribution by Scientific Domains
Chemistry100%

Selected Abstracts

Palladium on Carbon-Catalyzed Synthesis of Benzil Derivatives from 1,2-Diarylalkynes with DMSO and Molecular Oxygen as Dual Oxidants

ADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 10 2010
Shigeki Mori
Abstract A palladium on carbon (Pd/C)-catalyzed synthetic method for the preparation of benzil derivatives from 1,2-diarylalkynes has been established using dimethyl sulfoxide (DMSO) and molecular oxygen as dual oxidants. Regardless of the electrical nature of the functional groups on the aromatic rings, 1,2-diarylalkynes were oxidized to the corresponding benzil derivatives in high to excellent yields. Furthermore, the oxidation could efficiently be catalyzed by both the dry and wet types of Pd/C under atmospheric conditions. [source]

Computational study of the synthesis of benzoin derivatives from benzil

INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY, Issue 7 2006
Kevser Göçmen Topal
Abstract Benzil (1,2-diphenylethane-1,2-dione) undergoes cyanide catalyzed condensation with benzaldehyde to yield O -benzoylated benzoin (2-benzoyl-1,2-diphenylethanone). In this study, the experimentally suggested mechanism has been modeled with PM3 and verified with B3LYP. The effect of the substituent on the reaction yield has been rationalized by considering two benzil derivatives; 1,2-bis(2-chlorophenyl)ethane-1,2-dione and 1,2-bis(2-fluorophenyl)ethane-1,2-dione and three benzaldehyde derivatives; o -fluorobenzaldehyde, o -methylbenzaldehyde and 2-pyridinecarboxaldehyde. The effect of the solvent has been modeled by using the isodensity-surface polarizable continuum (IPCM) model. Reactivity descriptors have been used to justify the reactivity differences of the various substituents. © 2006 Wiley Periodicals, Inc. Int J Quantum Chem, 2006 [source]

Palladium-catalyzed arylation of arylglyoxals with arylboronic acids

APPLIED ORGANOMETALLIC CHEMISTRY, Issue 12 2009
Qiang Zhang
Abstract A palladium-catalyzed coupling-type reaction of arylglyoxals with arylboronic acids was achieved by use of trimesitylphosphine as the ligand and K2CO3 as base in toluene, providing symmetrical and unsymmetrical benzil derivatives with yields ranging from moderate to excellent. Of particular mention, the rigorous exclusion of air and moisture is not required in these transformations. Copyright © 2009 John Wiley & Sons, Ltd. [source]