Baeyer–Villiger oxidation in compressed CO2Safety warning: The use of compressed gases and especially oxygen in the presence of organic substrates requires appropriate safety precautions and must be carried out using suitable equipment only.
The aerobic BaeyerâVilliger oxidation of a wide range of ketones, both cyclic and acyclic to the corresponding esters or lactones can be efficiently carried out in compressed carbon dioxide in the presence of an aldehyde as co-reductant
Method of producing optically active lactone compound
申请人:Kyushu University
公开号:EP1449840A1
公开(公告)日:2004-08-25
An optically active lactone compound is produced by using a complex in which Pd or Pt is a central metal and a compound having a specified structure is a ligand as a catalyst, and subjecting a cyclic ketone compound to a Baeyer-Villiger oxidation with a specified oxidizer.
Optically active lactones are obtained by metal-catalyzed aerobic oxidation of prochiral cyclobutanones. Starting from 3-monosubstituted substrates lactones with moderate enantioselective (up to 47% ee) have been obtained. Kelly's tricyclic ketone 8 provides the corresponding lactone with 91% enantiomeric excess.
Chiral aluminum complexes as catalysts in asymmetric Baeyer-Villiger reactions of cyclobutanones
作者:Carsten Bolm、Oliver Beckmann、Chiara Palazzi
DOI:10.1139/v01-137
日期:2001.11.1
employed as mediators and catalysts in asymmetricBaeyer-Villiger rearrangements of cyclobutanones. Good enantioselectivies were achieved with only 15 mol% of the chosen chiral Lewis acid. The enantiomeric excesses obtained have never been reached before in such metal-catalyzed Baeyer-Villiger reactions.Key words: aluminum, asymmetric catalysis, lactones, oxidations, rearrangement.
Vaulted Biaryls: Efficient Ligands for the Aluminum-Catalyzed Asymmetric Baeyer-Villiger Reaction
作者:Carsten Bolm、Jean-Cédric Frison、Yu Zhang、William D. Wulff
DOI:10.1055/s-2004-829080
日期:——
Vaultedbiaryls (VANOL and VAPOL) have been ap- plied in the aluminum-catalyzed asymmetric Baeyer-Villiger reaction of prochiral 3-substituted cyclobutanones. Optically active g-butyrolactones are obtained in high yields with enantioselectivi- ties of up to 84% ee.