Ferrocenyl phosphine–oxazaphospholidine oxide ligands for the Suzuki–Miyaura coupling of hindered aryl bromides and chlorides

Abstract

A series of ferrocenyl oxazaphospholidine phosphines that differ electronically and sterically were investigated as ligands for the Suzuki–Miyaura cross-coupling reactions. One of these compounds, 1, was shown to be highly effective in the coupling reactions of bulky aryl bromides with boronic acids when combined with Pd(OAc)2, while another, 2, was capable of coupling aryl chlorides with boronic acids. However, these ligands were less effective in asymmetric induction.Key words: Suzuki–Miyaura coupling, ferrocenyl phosphines, aryl bromides, aryl chlorides, palladium.