A copper‐catalyzed [3+2] cylcoaddition/ alkenyl C−N coupling tandem reaction was demonstrated. It provided a method for the formation of triazolopiperidine skeletons.

An efficient and convenient synthesis of pyrrole-fused tetracyclic skeletons is presented. In this protocol using CuI as a catalyst, 1,1’-biphenyl substrates equipped with 2-alkynoly and 2’-iodo groups react with isocyanoacetates...

An alkyne–isocyanide [3 + 2] cycloaddition followed by a Boulton–Katritzky rearrangement and a ring expansion is demonstrated. Different from the typical Boulton-Katritzky rearrangement, which forms five-membered ring products, the rearrangement-ring expansion method provides a mild, efficient, and atom-economical access to fused 9-deazaguanine structures in high yields.