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Synthesis of Spirobicyclic Pyrazoles by Intramolecular Dipolar Cycloadditions/[1s, 5s] Sigmatropic Rearrangements

Formation of fused pyrazoles via intramolecular 1,3-dipolar cycloadditions of diazo intermediates with pendant alkynes are described. A subsequent thermal [1s, 5s] sigmatropic shift of these pyrazole systems resulted in a ring contraction to form spirocyclic pyrazoles. The limitations of this rearra...

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Detalhes bibliográficos
Publicado no:Org Lett
Main Authors: Dimirjian, Christine A., Castiñeira Reis, Marta, Balmond, Edward I., Turman, Nolan C., Rodriguez, Elys P., Di Maso, Michael J., Fettinger, James C., Tantillo, Dean J., Shaw, Jared T.
Formato: Artigo
Idioma:Inglês
Publicado em: 2019
Assuntos:
Acesso em linha:https://ncbi.nlm.nih.gov/pmc/articles/PMC6955098/
https://ncbi.nlm.nih.gov/pubmed/31486651
https://ncbi.nlm.nih.govhttp://dx.doi.org/10.1021/acs.orglett.9b02124
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