New transmetalation reagents for the gold-catalyzed visible light-enabled C(sp or sp<sup>2</sup>)–C(sp<sup>2</sup>) cross-coupling with aryldiazonium salts in the absence of a photosensitizer
作者:Sina Witzel、Kohei Sekine、Matthias Rudolph、A. Stephen K. Hashmi
DOI:10.1039/c8cc08227h
日期:——
visible light-driven gold-catalyzed cross-coupling was evaluated by a wide variety of organoboron and organosilicon species using four equivalents of aryldiazonium salts and (4-CF3-C6H4)3PAuCl in MeOH. In addition, a C(sp or sp2)–C(sp2) cross-coupling of organotrimethylsilanes and aryldiazonium salts was investigated. The reactions can be conducted under very mild reaction conditions, with a reduced amount
Palladium-Catalyzed Cross-Coupling of Aryl Triethylammonium Bis(catechol) Silicates with Aryl Bromides Using Microwave Irradiation
作者:W. Michael Seganish、Philip DeShong
DOI:10.1021/ol048044q
日期:2004.11.1
The scope of the palladium-catalyzed cross-coupling reaction of aryl bis(catechol) silicates has been extended to include the coupling of aryl bromides by employing microwave irradiation. This new set of coupling conditions is tolerant of electron-rich and -deficient aryl bromides. In addition, a variety of substituted aryl bis(catechol) silicates have been successfully cross-coupled.