Chemical Research in Chinese Universities ›› 2020, Vol. 36 ›› Issue (5): 843-846.doi: 10.1007/s40242-019-9013-9

• Articles • Previous Articles     Next Articles

Promotion Mechanism of H2O for Stereoselectivity in Pd(II)-catalyzed C-H Arylation of Diarylphosphinamides with Arylboronic Acids

CAI Yanchun, JIAO Long, QIU Xuepeng, DU Zhijun   

  1. Polymer Composites Engineering Laboratory, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
  • Received:2019-10-20 Revised:2019-11-16 Online:2020-10-01 Published:2020-10-01
  • Contact: DU Zhijun E-mail:dzj1126@ciac.ac.cn
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.21772190).

Abstract: On the basis of a series of control experiments and nuclear magnetic resonance analyses, it is discovered that Boc-protected amino acid ligand coordinated to Pd center is partly replaced by N,N-dimethylformamide, and H2O can inhibit coordination of N,N-dimethylformamide to Pd center. The novel action mechanism perfectly explains H2O promotion for stereoselectivity in Pd(II)-catalyzed C-H arylation of diarylphosphinamides with arylboronic acids.

Key words: C-H activation, Stereoselectivity, Water, Ligand exchange