The first enantioselective [12+ 2] cycloaddition has been developed for the construction of a
chiral cycl [3.2. 2] azine core, a tricyclic moiety with a central ring-junction nitrogen atom, by …

Since the first discovery by Huigsen and co‐workers fifty years ago, a wide range of organic
reactions have taken place through the intermediary of the dipolar/zwitterionic species …

The three-component reaction of 1, 3-indanedione and N-alkylisatins with two molecular N-
phenacylpyridinium salts in dry acetonitrile in the presence of triethylamine resulted in …

The base-promoted cycloaddition reaction of N-cyanomethylisoquinolinium chloride with 2-
arylidene-1, 3-indanediones in dry tetrahydrofuran resulted in the expected spiro [indene-2 …

The DBU promoted domino annulation reaction of 2-aryl-3-nitrochromenes with two
molecular 4-(N, N-dimethylamino)-1-phenacylpyridinium bromides in DMF resulted in …

A facile synthesis of Pechmann dyes has been accomplished by the reaction of substituted
N‐phenacyl‐4‐dimethylaminopyridinium halides with dimethyl maleate in the presence of …

Abstract Pyridinium salts Py+‐CH2‐EWG (EWG= CO2Et, CONEt2, CN, COMe, COPh)
reacted with Michael acceptors Ar‐CH= C (CO2Et)(Acc)(Acc= CO2Et, COMe, SO2Me …

The triethylamine promoted three-component reaction of N-(4-nitrobenzyl), N-
ethoxycarbonylmethylisoquinolinium bromide, isatins and malononitrile in ethanol afforded …

The one-pot base-promoted cascade double [3+ 2] cycloaddition reaction of N-
cyanomethylisoquinolinium chloride with (E)-3-arylideneindolin-2-ones and (E)-N …

The synthesis of a series of 1, 3-dithiolium perchlorates has been realized by the
intramolecular condensation of various substituted 2-(5-bromo-2-hydroxyphenyl)-2 …