Phosphine-Scavenging Cationic Gold(I) Complexes: Alternative Applications of Gold Cocatalysis in Fundamental Palladium-Catalyzed Cross-Couplings

Authors

Curtis Ho, University of Tasmania
Alireza Ariafard, Islamic Azad University, University of Tasmania (UTAS)Follow
Christopher J. T Hyland, University of WollongongFollow
Alex C. Bissember, University of Tasmania (UTAS)

RIS ID

136905

Publication Details

Ho, C. C., Ariafard, A., Hyland, C. J.T. & Bissember, A. C. (2019). Phosphine-Scavenging Cationic Gold(I) Complexes: Alternative Applications of Gold Cocatalysis in Fundamental Palladium-Catalyzed Cross-Couplings. Organometallics, 38 (13), 2683-2688.

Abstract

We have demonstrated that air-stable cationic gold(I) cocatalysts have the capacity to enhance the efficiency of palladium-catalyzed cross-couplings. Specifically, we determined that a 1:1 [Pd{P(t-Bu)3}2]/[Au{P(t-Bu)3}(NTf2)] system provides superior reactivity relative to [Pd{P(t-Bu)3}2], across Suzuki-Miyaura, Stille, and Mizoroki-Heck reactions performed under mild conditions. Our results are consistent with cationic gold(I) species serving primarily as phosphine scavengers in this chemistry, as recently predicted by density functional theory (DFT).

Grant Number

ARC/DP180100904