Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/99926
Type: Artigo de periódico
Title: Reactions Of 3-diazo-1,3-dihydro-2h-indol-2-one Derivatives With Enaminones. A Novel Synthesis Of 1,2,3-triazoles
Author: Augusti R.
Kascheres C.
Abstract: A new and efficient method of 1,2,3-triazole synthesis is described in which these heterocyclics are formed through a novel nitrogen transfer from diazocarbonyl compounds to enaminones. Thus, the reaction of 3-diazo-1,3-dihydro-2H-indol-2-one derivatives 1 (X = NR3) and 3-diazobenzo[6]thiophen-2(3H)-one 5 (X = S) with enaminones 2 and 7 leads to the formation of mainly 1,2,3-triazoles 4 and pyrazoloquinazolinones 3. Both the phenyl substituants (Y and Z in 1) and the nature of the X group affects the reaction rate and product distribution. Rate increases with an increase in the electron-withdrawing ability of the substituants Y and Z. The dinitro derivative 1g is shown to be the most efficient in promoting 1,2,3-triazole 4 formation while pyrazoloquinazolinones 3 are often competitively formed when other derivatives of 1 are employed. © 1993 American Chemical Society.
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Address: http://www.scopus.com/inward/record.url?eid=2-s2.0-0027730484&partnerID=40&md5=8de1d3128614b44b93de11b84b85b376
Date Issue: 1993
Appears in Collections:Unicamp - Artigos e Outros Documentos

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