An Improved Synthesis of Functionalized Biphenyl-Based Phosphine Ligands
作者:Hiroshi Tomori、Joseph M. Fox、Stephen L. Buchwald
DOI:10.1021/jo000691h
日期:2000.8.1
Functionalized dicyclohexyl- and di-tert-butylphosphinobiphenyl ligands are prepared by the reaction of arylmagnesium halides with benzyne, followed by the addition of a chlorodialkylphosphine. This one-pot procedure is considerably less expensive and time-consuming than the method used previously to prepare such ligands. The cost of introducing the dicyclohexylphosphine group can be decreased by preparing