Pd-Catalyzed Chemoselective Cross-Coupling Reaction of Triaryl- or Triheteroarylbismuth Compounds with 3,6-Dihalopyridazines

The cross-coupling reactions of 3,6-dihalopyridazines with triaryl- or triheteroarylbismuth compounds were performed under palladium catalysis. The reaction was highly chemoselective, affording functionalized aryl- or heteroarylpyridazinyl chlorides in moderate to good yields.