Planar Chiral Flavinium Salts: Synthesis and Evaluation of the Effect of Substituents on the Catalytic Efficiency in Enantioselective Sulfoxidation Reactions
substituted planarchiralflaviniumsalts with a phenyl “cap” have been prepared as potential catalysts for enantioselectivesulfoxidationreactions with hydrogen peroxide by using an approach based on the synthesis of (arylamino)uracils and their condensation with substituted nitrosobenzenes. The effect of substituents at various positions on the ability of the catalyst to promote enantioselective sulfoxidation
A series of novel 5-deazaflavin derivatives possessing axial chirality at pyrimidine ring moiety have been prepared to investigate effects of the pyrimidine site on the stereoselective reactions between flavins and substrates. Successful optical resolution of the racemic compounds has been achieved by HPLC method on a chiral stationary phase and a diastereomer formation method. The chiral recognition
Physical properties of atropisomeric 5-deazaflavin derivatives
作者:Atsuyoshi Ohno、Jun Kunitomo、Yasushi Kawai
DOI:10.1016/s0040-4020(97)00175-0
日期:1997.3
Optically active 5-deazaflavin derivatives with an axial chirality at the N(3) position have been synthesized. Kinetics for thermal enantiomerization and X-ray crystallographic analyses of these compounds have been carried out. In addition, all absolute configurations of their enantiomers have been determined on the basis of circular dichroism spectra.