A highly active two six-membered phosphinite palladium PCP pincer complex [PdCl{C6H3(CH2OPPri)2-2,6}]
作者:Ali Naghipour、S.J. Sabounchei、David Morales-Morales、Daniel Canseco-González、Craig M. Jensen
DOI:10.1016/j.poly.2006.11.023
日期:2007.5
The diphosphinite 1,3-bis[(di-isopropylphosphinite)methyl]benzene (2) has been synthesized and its complexation in palladium chemistry investigated. Complex 3 represents the first example of a two six-member PCP pincer bis(phosphinite) species. A catalytic study of 3 in the Heck reaction, revealed this specie to have an outstanding activity in the olefination of iodo-, bromo- and chloro-benzenes. When compared with other PCP pincer complexes, the results show that both by increasing the ring size from five to six-membered and using phosphinite instead of phosphine groups lead to a more active catalyst. (C) 2007 Elsevier Ltd. All rights reserved.