Dutch Resolution: Separationof Enantiomers with Families of Resolving Agents. A Status Report
作者:Richard M. Kellogg、José W. Nieuwenhuijzen、K. Pouwer、Ton R. Vries、Quirinus B. Broxterman、Reinier F.P. Grimbergen、Bernard Kaptein、René M. Crois、Ellen de Wever、Karen Zwaagstra、Alexander C. van der Laan
DOI:10.1055/s-2003-40508
日期:——
Dutch Resolution is the term given to the use of mixtures (families) of resolving agents in classical resolutions. In this status report an overview is given of the latest results and new (possible) families of resolving agents are introduced. The concept of families is discussed as well as the factors that come into play on use of families. Practical aspects of Dutch Resolution in particular and resolutions in general are discussed.
Oxidative C–S Bond Cleavage of Benzyl Thiols Enabled by Visible-Light-Mediated Silver(II) Complexes
作者:Boseok Hong、Kim Christopher C. Aganda、Anna Lee
DOI:10.1021/acs.orglett.0c01399
日期:2020.6.5
The oxidative cleavage reaction of the C–Sbond using singlet oxygen is challenging because of its uncontrollable nature. We have developed a novel method for the singlet-oxygen-mediated selective C–Sbond cleavage reaction using silver(II)–ligand complexes. Visible-light-induced silver catalysis enables the controlled oxidative cleavage of benzyl thiols to afford carbonyl compounds, such as aldehydes
Whilst methodologies for the Kinetic Resolution of alcohols are well established, no analogous direct methods exist for the highly selective, direct catalytic Kinetic Resolution of thiols (i.e., R—SH). The present invention relates to a method for resolving stereoisomeric mixtures of thiols. In particular, the present invention relates to purely organocatalytic mediated resolution of enantiomeric mixtures of thiols without the need for enzymes. Also disclosed are some novel catalysts. Such catalysts may comprise a cinchona alkaloid-derived moiety.