Suzuki–Miyaura biaryl and diarylmethane syntheses via the coupling of arylboronic acids with aryl and arylmethyl bromides are performed in water by means of two new CNC-type palladium pincer complexes. Good to excellent results (including high TON values and extended recycling procedures) are obtained in most cases for a range of electronically dissimilar halides and boronic acids. On the basis of
The cross-couplingreaction between arylboronicacids and various benzylic halides proceeded without using a transition-metal catalyst to give the corresponding diarylmethanes in moderate to good yields.
The catalytic activity of a PCN-type palladium pincer complex is evaluated in the construction of C(sp(2))-C C(sp(2)) and C(sp(2))-C(sp(3)) bonds by Suzuki-Miyaura cross-couplings employing nontypical subs such as benzyl halides, alpha-haloenones, or alkylboronic acids as coupling partners. Most of the reported reactions are achieved in aqueous media, with all of the advantages implied.