A facile and versatile catalytic system involving copper catalyst, K3PO4 as the base, and O2 as the oxidant has been developed to enable efficient synthesis of 2, 4, 6-trisubstituted and 2, 6-disubstituted 1, 3, 5-triazines and 1, 3-disubstituted 1, 2, 4-triazoles from amidines with