28022-64-2Relevant academic research and scientific papers
Pyrazolium-sulfonates. Mesomeric betaines possessing iminium-sulfonate partial structures
Dreger, Andrij,Muenster, Niels,Nieto-Ortega, Belen,Ramirez, Francisco Javier,Gjikaj, Mimoza,Schmidt, Andreas
scheme or table, p. 20 - 37 (2012/03/22)
Pyrazolium-3-sulfonates and pyrazolium-4-sulfonates possessing the iminiomethanesulfonate and the 3-iminio-pro-1-ene-2-sulfonate partial structure are prepared. Formally, they represent sulfur analogs of cross-conjugated (CCMB) and pseudo-cross-conjugated
Functionalized 4-aminoquinolines by rearrangement of pyrazole N-heterocyclic carbenes
Schmidt, Andreas,Muenster, Niels,Dreger, Andrij
supporting information; experimental part, p. 2790 - 2793 (2010/07/04)
(Figure Presented) Thermal decarboxylation of 1-phenyl pyrazolium-3- carboxylates from the mesomeric betaine class of substances leads to pyrazole-N-heterocyclic carbenes, which immediately rearrange to multiply substituted 4-aminoquinolines (see scheme). These species are of interest for the synthesis of heterocycles and pharmacologically active compounds.
