Cu(<scp>ii</scp>)-catalyzed enantioselective oxygen atom transfer from oxaziridine to oxindole derivatives with chiral phenanthroline
作者:Yuki Naganawa、Tomotaka Aoyama、Hisao Nishiyama
DOI:10.1039/c5ob01840d
日期:——
In the presence of a Cu(II) complex of axially chiral, N,N,O-tridentate phenanthroline ligand (S)-2, asymmetric oxygen atom transfer of oxindole derivatives (3) using Davis’ oxaziridine (4) occurred to give the corresponding 3-aryl-3-hydroxy-2-oxindole derivatives (1) with excellent enantioselectivity (up to 96% ee). The X-ray crystallographic analysis of the isolated Cu(II) complex disclosed its N
在存在轴向手性N,N,O-三齿菲咯啉配体(S)-2的Cu(II)配合物的情况下,使用戴维斯的恶唑烷(4)发生了吲哚衍生物(3)的不对称氧原子转移,从而得到具有出色的对映选择性(最高96%ee)的相应3-芳基-3-羟基-2-氧吲哚衍生物(1)。分离出的Cu(II)配合物的X射线晶体学分析揭示了其N,N,O-三齿配位,这对于实现有效的催化活性至关重要。