SINGLE STEP ENANTIOSELECTIVE PROCESS FOR THE PREPARATION OF 3-SUBSTITUTED CHIRAL PHTHALIDES
申请人:Council of Scientific & Industrial Research
公开号:US20140330027A1
公开(公告)日:2014-11-06
The present invention discloses single step, highly enantioselective catalytic oxidative cyclization process for the synthesis of 3-substituted chiral phthalides. In particular, the invention discloses asymmetric synthesis of chiral phthalides via synergetic nitrile accelerated oxidative cyclization of o-cyano substituted aryl alkenes in high yield and enantiomeric excess (ee) in short reaction time. Also, disclosed herein is “one-pot” asymmetric synthesis of biologically important natural compounds having 3-substituted chiral phthalide structural framework in the molecule.
本发明公开了一种单步、高对映选择性的催化氧化环化过程,用于合成3-取代手性邻苯二甲酸酐。具体来说,该发明公开了通过协同作用的腈加速氧化环化,以高产率和对映选择性(ee)在短反应时间内合成手性邻苯二甲酸酐的不对称合成方法。此外,还公开了一种“一锅法”不对称合成具有3-取代手性邻苯二甲酸酐结构框架的生物重要天然化合物。