Synthesis of Multifunctionalized 2‑Carbonylpyrrole by Rhodium-Catalyzed Transannulation of 1‑Sulfonyl-1,2,3-triazole with β‑Diketone

A facile rhodium-catalyzed transannulation of 1-sulfonyl-1,2,3-triazoles with β-diketones was realized, and a series of multisubstituted 2-carbonylpyrroles were synthesized efficiently (up to 94% yield). The protocol features several advantages, such as readily available materials, mild reaction conditions, a concise operating procedure, a broad reaction scope, and excellent regioselectivity when benzoylacetone derivatives were used.