Unsaturated iridium pyridinedicarboxylate pincer complexes with catalytic activity in borylation of arenes.

Iridium-catalyzed borylation of arenes and heteroarenes via C–H activation*

Direct C–H borylation of aromatic compounds catalyzed by a transition-metal complex was studied as an economical protocol for the synthesis of aromatic boron derivatives. Iridium complexes generated from Ir(I) precursors and 2,2'-bipyridine ligands efficiently catalyzed the reactions of arenes and heteroarenes with bis(pinacolato)diboron or pinacolborane to produce a variety of aryland heteroar...

Iridium/N-heterocyclic carbene-catalyzed C–H borylation of arenes by diisopropylaminoborane

Catalytic C-H borylation of arenes has been widely used in organic synthesis because it allows the introduction of a versatile boron functionality directly onto simple, unfunctionalized arenes. We report herein the use of diisopropylaminoborane as a boron source in C-H borylation of arenes. An iridium(I) complex with 1,3-dicyclohexylimidazol-2-ylidene is found to efficiently catalyze the boryla...

Iridium-bipyridine periodic mesoporous organosilica catalyzed direct C-H borylation using a pinacolborane.

Heterogeneous catalysis for direct C-H borylation of arenes and heteroarenes in the combination of iridium (Ir) complex fixed on periodic mesoporous organosilica containing bipyridine ligands within the framework (Ir-BPy-PMO) and pinacolborane (HBpin) is reported. Ir-BPy-PMO showed higher catalytic activity toward the borylation of benzene with inexpensive HBpin compared to expensive bis(pinaco...

CREATED USING THE RSC CHEMCOMM TEMPLATE - SEE WWW.RSC.ORG/ELECTRONICFILES FOR DETAILS Room temperature borylation of arenes and heteroarenes by stoichiometric amounts of pinacolborane catalyzed by iridium complexes in an inert solvent†

Iridium complexes of new NCP pincer ligands: catalytic alkane dehydrogenation and alkene isomerization.

Iridium complexes of novel NCP pincer ligands containing pyridine and phosphinite arms have been synthesized. One Ir complex shows good catalytic activity for alkane dehydrogenation, and all complexes are highly active for olefin isomerization. A combination of the Ir complex and a (PNN)Fe pincer complex catalyzes the formation of linear alkylboronates selectively from internal olefins via sequ...