Scheme 3. Synthesis of Compounds from Table 3, Investigating Different Substitution Patterns on Pyrimidine or Pyridine Rings.
Reagents and conditions: (a) heteroaryl chloride, DIPEA, NMP or DMF, 80–120 °C, 30 min; (b) 4-bromo- or iodopyridine, Xantphos, Pd2(dba)3, cesium carbonate, NMP/toluene, 140 °C, 1 h.