ZnO Catalyzed Efficient Synthesis of Some New 2-Substituted-4,6-diarylpyrimidines

Table 1

Effect of temperature for the synthesis of 2-substituted-4,6-diarylpyrimidine^a.

Entry	Temperature (°C)	Yield (%)
1	Room temp	Nil
2	60	30
3	80	60
4	100	90
5	120	90

^aReaction conditions: chalcone (0.002 mol), SBT (0.0022 mol), heterocyclic secondary amine (0.0024 mol), and ZnO catalyst (15 mol%) in DMF (10 mL) at 100°C temperature for 6 h.