Synthesis of 2-(fluorinated aryl)pyridine derivatives via palladium-catalyzed C H bond arylation of fluorobenzenes using 2-halopyridines as aryl sources
We report herein on palladium-catalyzed direct arylation of (poly)fluorobenzene derivatives in the presence of 2-halopyridines for the one-step synthesis of 2-[(poly)fluorinated aryl]pyridinederivatives. The reactivity of 2-bromopyridines strongly dependents on its substituents at C6 position. The reaction proceeds nicely using a diphosphine palladium catalyst, and potassium pivalate/dimethylacetamide
PdF: A simple catalytic system, broad substrate scope, and high versatility provide a useful and facileaccess to partiallyfluorinatedaromatics (see scheme). Tuning the reaction conditions enables a diverse range of product structures to be prepared.