Novel zwitterionic phosphonium alkylsulfonate ligands are chemoselectively synthesized from N-heterocyclic phosphines and cyclic sulfones in one step in good to excellent yields.
<b>Selective Pd-Catalyzed Monoarylation of Small Primary Alkyl Amines through Backbone-Modification in Ylide-Functionalized Phosphines (YPhos)</b>
作者:Ilja Rodstein、Daniel Sowa Prendes、Leon Wickert、Maurice Paaßen、Viktoria H. Gessner
DOI:10.1021/acs.joc.0c01771
日期:2020.11.20
Ylide-substituted phosphines have been shown to be excellent ligands for C–N couplingreactions under mild reaction conditions. Here we report studies on the impact of the steric demand of the substituent in the ylide-backbone on the catalytic activity. Two new YPhos ligands with bulky ortho-tolyl (pinkYPhos) and mesityl (mesYPhos) substituents were synthesized, which are slightly more sterically demanding