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Title: New chemistry of diazafulvenium methides: one way to pyrazoles
Authors: Melo, Teresa M. V. D. Pinho e 
Soares, Maria I. L. 
Gonsalves, António M. d'A. Rocha 
Keywords: Diazafulvenium methides; Vinyl-1H-pyrazoles; Pyrazolo[1,5-a]pyridines; Pyrazolo[1,5-a]pyrrolo[3,4-c]pyridine; [8[pi]+2[pi]] Cycloaddition; Sigmatropic shift
Issue Date: 2006
Citation: Tetrahedron Letters. 47:5 (2006) 791-794
Abstract: Diazafulvenium methides generated from the solution pyrolysis of pyrazolo[1,5-c][1,3]thiazole-2,2-dioxides participate in [8[pi]+2[pi]] cycloadditions giving pyrazolo[1,5-a]pyridine derivatives. 1-Methyl-diazafulvenium, generated under flash vacuum pyrolysis reaction conditions, undergoes an intramolecular sigmatropic [1,8]H shift giving 1-vinyl-1H-pyrazoles.
Rights: openAccess
Appears in Collections:FCTUC Química - Artigos em Revistas Internacionais

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