Due to the existence of relevant targets that could be accessible via the double amination of diamines (e.g., bistacrine), we also examined the possibility of achieving this transformation under our conditions. Indeed, as shown in Scheme 2, we found that treatment of a 1:2 mixture of piperazine and 7,9-dichloro-3- methoxyacridine under our usual conditions cleanly afforded compound 13 in 78% yield.