Please use this identifier to cite or link to this item:
https://hdl.handle.net/10316/10634
Title: | Chemistry of Diazafulvenium Methides in the Synthesis of Functionalized Pyrazoles | Authors: | Melo, Teresa M. V. D. Pinho e Nunes, Cláudio M. Soares, Maria I. L. Paixão, José A. Beja, Ana Matos Silva, Manuela Ramos |
Issue Date: | 8-Jun-2007 | Publisher: | American Chemical Society | Citation: | The Journal of Organic Chemistry. 72:12 (2007) 4406-4415 | Abstract: | The chemistry of diazafulvenium methides generated by the thermal extrusion of sulfur dioxide from 2,2-dioxo-1H,3H-pyrazolo[1,5-c] [1,3]thiazoles is described. The diazafulvenium methides unsubstituted at C-7 participate in [8π + 2π] cycloadditions giving pyrazolo-annulated heterocycles resulting from the addition across the 1,7-position. 1-Methyl-diazafulvenium methides and 7,7-dimethyl-diazafulvenium methides undergo intramolecular sigmatropic [1,8]H shifts giving vinyl-1H-pyrazoles. | URI: | https://hdl.handle.net/10316/10634 | ISSN: | 0022-3263 | DOI: | 10.1021/jo070265x | Rights: | openAccess |
Appears in Collections: | FCTUC Física - Artigos em Revistas Internacionais FCTUC Química - Artigos em Revistas Internacionais |
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Chemistry of Diazafulvenium Methides in the Synthesis.pdf | 228.49 kB | Adobe PDF | View/Open |
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