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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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| Publicado no: | Org Lett |
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| Main Authors: | , , , , , , , , |
| Formato: | Artigo |
| Idioma: | Inglês |
| Publicado em: |
2019
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| 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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