Bis(azido)paIladium(II)Complexes Bearing an(R or S)-(BINAP) Ligand:Synthesis,Structures,and Catalytic Application to Suzuki-Miyaura C-C Coupling Reactions

摘要

Chiral ligand 2,2'-bis(diphenylphosphino)-1,1'-binaphthyl(BINAP)is widely utilized as an ancillary ligand for late-transition-metal complexes,especially for Ru and Rh metals,in asymmetric organic catalysis.BINAP-Pd(II)complexes in particular have been intensively investigated as catalysts for reactions such as amination and C-C coupling.However,it is worth noting that BESFAP-Pd(II)complexes containing a pseudohalogen ligand have not been reported to exhibit C-C coupling activity,probably because of their poor solubility or low catalytic activity.Our research group has continually investigated the synthesis and catalytic properties of group 10 metal-pseudohalogen complexes.8 As an extension of our investigations into the scope of these complexes,we decided to prepare BINAP-Pd(II)complexes containing an azido ligand as a pseudohalogen group,expecting to find catalytic activity in Suzuki-Miyaura C-C coupling reactions.We report herein the synthesis,structures,and catalytic activity of these complexes.