Secondary Phosphine Oxide Preligands for Palladium-Catalyzed C-H (Hetero)Arylations: Efficient Access to Pybox Ligands
作者:Debasish Ghorai、Valentin Müller、Helena Keil、Dietmar Stalke、Giuseppe Zanoni、Boryslav A. Tkachenko、Peter R. Schreiner、Lutz Ackermann
DOI:10.1002/adsc.201700663
日期:2017.9.18
C–H arylations of oxazolines were accomplished with a well‐defined palladium catalyst derived from a secondary bisdiamantyl phosphine oxide. The single‐component secondary phosphine oxide (SPO)‐palladium complex enabled C–H activations with aryl bromides and challenging aryl chlorides in the absence of directing groups, setting the stage for the step‐economical synthesis of pybox ligands under racemization‐free