Organocatalytic Cyclization of COS and Propargylic Derivatives to Value‐Added Heterocyclic Compounds
作者:Hui Zhou、Rui Zhang、Sen Mu、Hui Zhang、Xiao‐Bing Lu
DOI:10.1002/cctc.201900490
日期:2019.12.5
and 1,3‐thiazolidine‐2,4‐diones derivatives in a highly chemo‐ and stereoselective manner. The isotope labeling and stoichiometric experiments suggested the LB‐COS adducts preferentially mediated basic ionic pair mechanism. Furthermore, the practical application of this methodology was highlighted by the highly efficient synthesis of rosiglitazone using COS as sulfur source.
首先通过使用路易斯碱(LB)的COS加合物作为有机催化剂,将羰基硫化物(COS)进行炔丙基胺/酰胺的有机催化环化反应,从而提供各种功能化的1,3-噻唑烷-2-酮和1,3-噻唑烷- 2,4-二酮衍生物具有高度的化学和立体选择性。同位素标记和化学计量学实验表明LB-COS加合物优先介导基本离子对机理。此外,使用COS作为硫源高效合成罗格列酮,突显了该方法的实际应用。