Regioselective electrochemical C–H sulfonylation–bromination between indolizines, sodium sulfinates, and KBr has been established in an undivided cell, in which KBr serves as both the brominating agent and electrolyte.
This review summarizes recent advances in electrochemical and photocatalytic C–H functionalization of indolizines, with an emphasis on the construction of C–C and C–X (X = S, Se, N, Cl, Br, etc.) bonds.
Blue to yellow-emitting 2-oxo-pyrano[2,3-b]indolizines, which are efficiently prepared in two steps from pyridinium salts, have strong emission across the solvent polarity scale.
This review summarizes the recent advances in cyclization reactions involving pyridinium 1,n-zwitterions (n = 4 and 5) and highlights the applications of pyridinium 1,n-zwitterions (n = 4 and 5) in the efficient construction of heterocycles.
Computational analysis reveals a boryl-radical-enabled cross-coupling pathway for synthesizing indolizines, emphasizing the role of H-shuttles in facilitating reactions.