Norfloxacin was used as an efficient ligand for the CuBr-catalyzed C-N coupling reaction of imidazole and aryl halides. The protocol presented good functional group compatibility, permitting many aryl halides to react with imidazole to form the desired products in good to excellent yields.

: A catalyst system derived from commercially available Cu(NO3)2.3H2O and 2,5-dihydroxyterephthalic acid is applied to the homocoupling reaction of arylboronic acids. This transformation provides a convenient approach for symmetrical biaryls with good to excellent yields (39%-95%), and exhibits good functional group compatibility. Furthermore, biaryl can be prepared in gram quantities in good yields.

The introduction of a secondary interaction is an efficient strategy to modulate transition-metal-catalyzed ethylene (co)polymerization. In this contribution, O-donor groups were suspended on amine–imine ligands to synthesize a series of nickel complexes. By adjusting the interaction between the nickel metal center and the O-donor group on the ligands, these nickel complexes exhibited high activities for ethylene polymerization (up to 3.48 × 106 gPE·molNi –1·h–1) with high molecular weight up to 5.59 × 105 g·mol–1 and produced good polyethylene elastomers (strain recovery (SR) = 69–81%). In addition, these nickel complexes can catalyze the copolymerization of ethylene with vinyl acetic acid, 6-chloro-1-hexene, 10-undecylenic, 10-undecenoic acid, and 10-undecylenic alcohol to prepare the functionalized polyolefins.