Journal of Heterocyclic Chemistry p. 889 - 894 (1999)
Update date:2022-08-03
Topics:
Diez-Barra, Enrique
De La Hoz, Antonio
Sanchez-Migallon, Ana
Elguero, Jose
We report a study on the quaternization and dequaternization of pyrazoles by conventional heating and microwave irradiation in solvent-free conditions. Microwave irradiation produces an acceleration in the quaternization rate and a rapid equilibration between quaternized and non quaternized products. Dequaternization is also more rapid and a change on the selectivity is observed using symmetric pyrazolium salts.
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