Synthesis of 2‐Aminopyrrolo[1,2‐b]pyridazines via Gold(I)‐Catalyzed Chemoselective Hydroamination/Hydroarylation Cascade of 1,3‐Diynamides with 1‐Aminopyrroles

The synthesis of 2‐aminopyrrolo[1,2‐b]pyridazines from 1,3‐diynamides and 1‐aminopyrroles via gold(I)‐catalyzed chemoselective hydroamination/hydroarylation cascade was described. 26 examples were conducted to explore the scope of the substrates. A plausible reaction mechanism was also proposed. In addition, the fluorescence properties both in solutions and in the solid states of the resulting products were investigated.