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https://hdl.handle.net/10316/5093| 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. | URI: | https://hdl.handle.net/10316/5093 | DOI: | 10.1016/j.tetlet.2005.11.094 | Rights: | openAccess |
| Appears in Collections: | FCTUC Química - Artigos em Revistas Internacionais |
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| file43fa774b321541ba9c51246d11535475.pdf | 115.05 kB | Adobe PDF | View/Open |
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