New chemistry of diazafulvenium methides: one way to pyrazoles
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 intramo...
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| Other Authors: | , |
| Format: | article |
| Language: | eng |
| Published: |
2006
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| Subjects: | |
| Online Access: | http://hdl.handle.net/10316/5093 |
| Country: | Portugal |
| Oai: | oai:estudogeral.sib.uc.pt:10316/5093 |
| Summary: | 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. |
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