Abstract
AbstractPalladium acetate reacts with 1‐benzyl‐3‐(2‐hydroxy‐2‐phenylethyl)‐1H‐imidazolium chloride to give the corresponding bis(carbene)palladium(II) complex 5 [(NHC)2PdCl2] by direct metalation. The X‐ray diffraction structure of the complex is reported. In the presence of NaOH solution (50 % H2O, w/w) in air and under microwave irradiation, the bis(NHC)pallalium(II) complex 5 is an active precatalyst for the Hiyama coupling of aryl halides with trialkoxy(aryl)silanes, providing biaryls and heterobiaryls. For some deactivated aryl bromides and for aryl chlorides, the corresponding cross‐coupling reactions require tetrabutylammonium bromide (TBAB) as additive. The fluoride‐free Hiyama reactions are performed with low (NHC)palladium loadings (0.1 mol‐%). The active catalyst can also be prepared in situ from Pd(OAc)2 and the corresponding imidazolium salt 4.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
