Exploring an Umpolung strategy for quaternization of phosphorus
作者:Anna C. Vetter、Kirill Nikitin、Declan G. Gilheany
DOI:10.1080/10426507.2018.1541242
日期:2019.5.27
phosphonium salts R3PR1 X (X = Cl, Br) from phosphine oxides R3PO. The new organic group R1 is introduced via nucleophilicattack on an intermediate halophosphonium salt using a Grignard reagent R1MgX and replaces the traditional phosphine quaternization approach. Consequently, the new method does not suffer from the limited availability of many parent phosphines and is much faster than standard quaternization