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An unusual thionyl chloride-promoted C−C bond formation to obtain 4,4'-bipyrazolones
Dialkyl 5,5'-dioxo-4,4'-bipyrazole-4,4'-dicarboxylates are readily obtained by the reaction of 5-hydroxypyrazole-4-carboxylates in refluxing thionyl chloride. The obtained diesters can be transformed into the corresponding 4,4'-bipyrazoles via alkaline hydrolysis and subsequent d...
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| Izdano u: | Beilstein J Org Chem |
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| Glavni autori: | , , , , , , |
| Format: | Artigo |
| Jezik: | Inglês |
| Izdano: |
Beilstein-Institut
2018
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| Teme: | |
| Online pristup: | https://ncbi.nlm.nih.gov/pmc/articles/PMC6009192/ https://ncbi.nlm.nih.gov/pubmed/29977396 https://ncbi.nlm.nih.govhttp://dx.doi.org/10.3762/bjoc.14.110 |
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