New strategy for the regioselective synthesis of 1-phenyl-3-trifluoromethyl-1H-pyrazoles

A regioselective synthesis of 3-trifluoromethyl-1-phenyl-1H-pyrazoles (1,3-isomers) as well as their 1,5-isomers (5-trifluoromethyl-1-phenyl-1H-pyrazoles), is described. The 1,3-isomers were obtained from the reaction of 4-alkoxy-1,1,1-trifluoroalk-3-en-2-ones with arylhydrazones followed by deprote...

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Veröffentlicht in:	Tetrahedron letters 2013-07, Vol.54 (31), p.4076-4079
Hauptverfasser:	Zanatta, Nilo, Amaral, Simone S., dos Santos, Josiane M., da Silva, Andréia M.P.W., Schneider, Juliana M.F.M., Fernandes, Liana da S., Bonacorso, Helio G., Martins, Marcos A.P.
Format:	Artikel
Sprache:	eng
Schlagworte:	Hydrolysis Phenylhydrazones Pyrazole Pyrazoles Regioselective synthesis Strategy Synthesis (chemistry) Tetrahedrons Trifluoromethyl enones Trifluoromethylpyrazoles
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