Synthesis of New Riminophenazines with Pyrimidine and Pyrazine Substitution at the 2-N Position

New riminophenazines with pyrimidine and pyrazine substituents at the 2-position were successfully synthesized. The key step is the 2-N-arylation of riminophenazines with pyrimidine and pyrazine. The optimized reaction conditions involve the use of a Pd₂(dba)₃/DPPF/Cs₂CO₃/toluene combination.