Article révisé par les pairs
Résumé : A set of two efficient and broadly applicable procedures for the N-arylation of hydantoins at the two nitrogen atoms is reported. The first one relies on the use of stoichiometric amounts of copper(I) oxide under ligandless and base-free conditions and enables a clean and regioselective arylation at the N3 nitrogen atom while the second one is based on the use of catalytic amounts of copper(I) iodide and trans-N,N′-dimethylcyclohexane-1,2-diamine and promotes arylation at the N1 nitrogen atom. Importantly, the combination of these two procedures affords a straightforward and general entry to diarylated hydantoins.