<i>Z</i>
‐Selective Hydrothiolation of Racemic 1,3‐Disubstituted Allenes: An Atom‐Economic Rhodium‐Catalyzed Dynamic Kinetic Resolution
作者:Adrian B. Pritzius、Bernhard Breit
DOI:10.1002/anie.201507623
日期:2015.12.21
A Z‐selective rhodium‐catalyzed hydrothiolation of 1,3‐disubstituted allenes and subsequent oxidation towards the corresponding allylic sulfones is described. Using the bidentate 1,4‐bis(diphenylphosphino)butane (dppb) ligand, Z/E‐selectivities up to >99:1 were obtained. The highly atom‐economic desymmetrization reaction tolerates functionalized aromatic and aliphatic thiols. Additionally, a variety
描述了Z-选择性铑催化的1,3-二取代的烯丙基的氢硫醇化反应,以及随后的氧化反应生成相应的烯丙基砜。使用双齿1,4-双(二苯基膦基)丁烷(dppb)配体,可获得高达> 99:1的Z / E选择性。高度经济的脱对称反应可耐受官能化的芳族和脂族硫醇。另外,各种对称的内部异位烯以及非对称的双取代底物都具有良好的耐受性,因此具有很高的区域选择性。从手性但外消旋的1,3-二取代的烯类化合物开始,通过应用(S,S)-Me-DuPhos作为手性配体可以实现动态动力学拆分(DKR)。所需的Z烯丙基砜的收率高,对映选择性高达ee的96%。