This review describes the efforts in the synthesis of pyrrole derivatives using the reaction of
alkynes with nitrogen‐compounds under transition metal‐catalyzed and metal‐free …

Type A mesoionic compounds are of particular interest due to their participation in
synthetically useful 1, 3-dipolar cycloaddition reactions. This review covers the chemistry of …

A regioselective synthesis of pyrroles has been devised through the cycloaddition of 1, 3-
oxazolium-5-olates and enamines. Product regiochemistry is controlled by the enamine …

The 1, 3 dipolar cycloaddition reactions of münchnones and alkenes provide an expedite
synthetic way to substituted pyrroles, an exceedingly important structural motif in the …

This review illustrates the unexpected and unique transformation of mesoionic 4-
trifluoroacetyl-1, 3-oxazolium-5-olates (4-TFMK-münchnones) on treatment with different …

Mesoionic 4‐trifluoroacetyl‐1, 3‐oxazolium‐5‐olates (münchnones) reacted with enamines
to yield densely functionalized 2‐trifluoroacetylpyrroles. The trifluoroacetic acid addition in …

Summary This Chapter Contains Sections titled: 2+ 2‐Cycloaddition 2+ 3‐Cycloaddition 2+
4‐Cycloaddition Miscellaneous References Tetrafluorothiophene S, S‐dioxide is a potent …

4-Trifluoroacetyl-3-phenylsydnone was first synthesized by trifluoromethylation of 4-formyl-3-
phenylsydnone followed by oxidation of the corresponding trifluoromethyl alcohol. The …