Diversity-oriented synthesis of pyrimidine–indole hybrids 8 and 9^a,b.

^aReaction conditions: (i) 6 (3 mmol), 1 (3.6 mmol), no solvent, 160 °C, 30 min; (ii) 7 (0.6 mmol), 4 (0.72 mmol), caesium carbonate (0.9 mmol), 1,4-dioxane (10 mL), 110 °C, 30 min.

^bIsolated yield.