T=115°C; 25 h; autorecycling oxidation; Product distribution;

T=120°C; 25 h; autorecycling oxidation, other 10- and 3,10-substituted 8-methylpyrido<2,3-d:6,5-d'>dipyrimidine-2,4,6(3H,10H,7H)-triones; Product distribution;

T=120°C; 25 h; autorecycling oxidation, other 10- and 3,10-substituted 8-methylpyrido<2,3-d:6,5-d'>dipyrimidine-2,4,6(3H,10H,7H)-triones; Product distribution;