Sterically congested polysubstituted salicylaldehydes are accessed through a Rh(iii)-catalyzed regioselective vinylic C–H [4 + 2] C-annulation reaction of vinyl enaminones with alkynes.
A simple Ni(II)-catalyzed C–H hydroarylation of diarylacetylenes with imidazolium salts without adding any ligand was developed. It provides a facile and efficient access to (E)-2-(1,2-diarylvinyl)imidazolium salts. The preliminary results indicate...
A Cu-catalyzed
regioselective C5–H arylation of imidazo[1,5-a]pyridines with aryl iodides was achieved with the assistance
of an ethylthio group at the C3 position. This directing group could
be easily removed to furnish a range of 5-(hetero)arylimidazo[1,5-a]pyridine derivatives. The reaction tolerates a variety
of functionalities and is compatible with sterically hindered substrates.
A series of cationic π-extended imidazolium salts are synthesized by a sequential Cu-catalyzed arylation/annulation and photocyclization strategy in a simple but efficient way. Among them, a nine-fused-ring compound with a...
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