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.
[EN] CONJUGATES UNDERGOING INTRAMOLECULAR REARRANGEMENTS<br/>[FR] CONJUGUÉS SUBISSANT DES RÉARRANGEMENTS INTRAMOLÉCULAIRES
申请人:ASCENDIS PHARMA AS
公开号:WO2021136808A1
公开(公告)日:2021-07-08
The present invention relates to conjugates and pharmaceutically acceptable salts thereof, reagents, intermediates, methods for the synthesis of said conjugates, pharmaceutical compositions comprising said conjugates and the use of said conjugates.
Synergistic organocatalysis in the kinetic resolution of secondary thiols with concomitant desymmetrization of an anhydride
作者:Aldo Peschiulli、Barbara Procuranti、Cornelius J. O' Connor、Stephen J. Connon
DOI:10.1038/nchem.584
日期:2010.5
Kineticresolution is an important method for the separation of racemates into their component enantiomers. Thiols are precursors to a variety of organosulfur compounds, with high utility in both chemistry and chemical biology, yet there is a surprising dearth of methodologies for their direct and efficient catalytic kineticresolution. Here, we demonstrate an organocatalytic process involving the
动力学拆分是将外消旋物分离为其组分对映体的重要方法。硫醇是多种有机硫化合物的前体,在化学和化学生物学中具有很高的实用性,但令人惊讶的是,它们缺乏直接有效的催化动力学拆分方法。在这里,我们展示了一种有机催化过程,该过程涉及非手性亲电试剂的高度对映选择性去对称化,同时外消旋硫醇的动力学分辨率。该方法的制备潜力通过以优异的收率和对映选择性合成药物前体对映体作为一个过程的副产品来举例说明,该过程还以S的选择性解析仲硫醇底物 = 226(即,在 51% 转化率下以 >95% ee产生的两种硫醇对映体)。在第二个实施例中,在温和条件下以合成有用的选择性拆分代表抗哮喘药物 ( R )-孟鲁司特的含有立体中心的核心的外消旋仲硫醇。
KINETIC RESOLUTION
申请人:Connon Stephen Joseph
公开号:US20120277437A1
公开(公告)日:2012-11-01
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.