Palladium(0)-Catalyzed Amination, Stille Coupling, and Suzuki Coupling of Electron-Deficient Aryl Fluorides
作者:Young Mi Kim、Shu Yu
DOI:10.1021/ja028966t
日期:2003.2.19
coupling in the presence of Pd(PPh3)4, and the reactions afforded the coupling products in 28-86% yields. The control experiments showed no sign of reaction in the absence of palladium. These results were in agreement with the oxidative addition/reductive elimination pathway, where the oxidative addition could conceivably proceed via the SNAr mechanism.
Proximity Effects in the Palladium-Catalyzed Substitution of Aryl Fluorides
作者:S. Bahmanyar、Bennett C. Borer、Young Mi Kim、David M. Kurtz、Shu Yu
DOI:10.1021/ol047413f
日期:2005.3.1
The aryl fluoride bond has long been considered inert toward Pd-catalyzed insertion reactions. This paper reports for the first time that aryl fluorides bearing an o-carboxylate group can undergo Pd-catalyzed couplings. On the basis of this computational study and subsequent experimental verifications of its predictions, we herein report that such reactions are facilitated by stabilization of the transition state by proximal oxyanions.