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。
US7214819B2
申请人:——
公开号:US7214819B2
公开(公告)日:2007-05-08
Kinetic Resolution of <i>sec</i>
-Thiols by Enantioselective Oxidation with Rationally Engineered 5-(Hydroxymethyl)furfural Oxidase
作者:Mathias Pickl、Alexander Swoboda、Elvira Romero、Christoph K. Winkler、Claudia Binda、Andrea Mattevi、Kurt Faber、Marco W. Fraaije
DOI:10.1002/anie.201713189
日期:2018.3.5
Various flavoproteinoxidases were recently shown to oxidize primary thiols. Herein, this reactivity is extended to sec‐thiols by using structure‐guided engineering of 5‐(hydroxymethyl)furfural oxidase (HMFO). The variants obtained were employed for the oxidative kinetic resolution of racemic sec‐thiols, thus yielding the corresponding thioketones and nonreacted R‐configured thiols with excellent
Preparation and Configurational Stability of Chiral Chloro-[D<sub>1</sub>]methyllithiums of 98% Enantiomeric Excess
作者:Dagmar C. Kapeller、Friedrich Hammerschmidt
DOI:10.1021/ja0779708
日期:2008.2.1
Enantiopure stannyl-[D1]methanol was converted to chloro-[D1]methylstannane under complete inversion of configuration using Ph3P/N-chlorosuccinimide in THF. It was transmetalated to stereospecifically give chloro-[D1]methyllithium (ee up to 98%). Its microscopic configurationalstability was tested by performing tin-lithium exchange in the presence of benzaldehyde as the electrophile under various