The recent advances in the syntheses of various heterocycles based on pyridinium ylides
are described. Depending on the reactivity of the pyridinium ylides and the reactants, a …

Predictive catalysis was applied to the reaction of pyridinium 1, 4‐zwitterionic thiolates with a
copper carbene. Theoretical calculations were first performed to determine the suitability of …

A decarboxylative/dehydrofluorinative formal [3+ 2] cycloaddition aromatization of
isoquinolinium N-ylides with difluoroenoxysilanes has been developed. This methodology …

Here we present a novel annulation of pyridinium salts with BrCF2CO2Et to access the
indolizine derivatives with high efficiency. The α substitution of pyridine plays a key role in …

Herein we describe the base-mediated [3+ 2] cycloaddition reaction of di/trifluoromethylated
hydrazonoyl chlorides with fluorinated nitroalkenes. The reaction protocol provides a direct …

Peculiarities of [8+ 2] cycloaddition of acetylenes to indolizines are reviewed. Especially
mentioned are indolizines with leaving groups at positions 3 and 5. Cycloaddition to aza …

An efficient route to pyrazolo [1, 5-a] pyridines by Cu (OAc) 2-promoted oxidative [3+ 2]-
annulation of nitroalkenes with in situ generated pyridinium imines is developed. The …

A [3+ 2]-annulation of gem-difluoroalkenes and pyridinium ylides was developed employing
ambient air as the sole oxidant in an open-vessel manner, affording a series of …

Presented herein is a method for the construction of indolizine-based heterocyclic sulfonyl
fluorides through [3+ 2] cycloaddition of isoquinolinium/quinolinium salts and 1 …

α-Fluoroalkynes are elusive molecules due to their instability and inaccessibility. Here, we
show that α-fluoronitroalkenes can serve as synthetic surrogates of α-fluoroalkynes in [3+ 2] …