Reactions of beta-carbonyl-substituted 4H-chromenes and 1H-benzo[f]chromenes with 5-aminopyrazoles
A method for the preparation of pyrazolo[1,5-a]pyrimidines containing a 2-hydroxybenzyl or (2-hydroxynaphthalen-1-yl)methyl group in position 6 based on the reaction of beta-carbonyl-substituted 4H-chromenes and their benzo analogs with 5-aminopyrazoles is proposed. A new type of ring-chain tautomer...
Gorde:
| Egile Nagusiak: | , |
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| Formatua: | Статья |
| Argitaratua: |
Springer
2021
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| Gaiak: | |
| Sarrera elektronikoa: | https://dspace.ncfu.ru/handle/20.500.12258/18459 |
| Etiketak: |
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| Gaia: | A method for the preparation of pyrazolo[1,5-a]pyrimidines containing a 2-hydroxybenzyl or (2-hydroxynaphthalen-1-yl)methyl group in position 6 based on the reaction of beta-carbonyl-substituted 4H-chromenes and their benzo analogs with 5-aminopyrazoles is proposed. A new type of ring-chain tautomerism with the participation of 7-(trifluoromethyl)pyrazolo[1,5-a]pyrimidines was discovered. |
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