| Autor: |
Yanyang He, Rong Hu, Rongsheng Tong, Fengqiong Li, Jianyou Shi, Mei Zhang |
| Jazyk: |
angličtina |
| Rok vydání: |
2014 |
| Předmět: |
|
| Zdroj: |
Molecules, Vol 19, Iss 12, Pp 19253-19268 (2014) |
| Druh dokumentu: |
article |
| ISSN: |
1420-3049 |
| DOI: |
10.3390/molecules191219253 |
| Popis: |
An efficient approach for the synthesis of functionalized 4-substituted-2-amino-3-cyano-4H-chromenes moderate to high yields (up to 98%) has been achieved via a tandem K2CO3 catalyzed conjugate addition-cyclization reaction of malononitrile and a range of Knoevenagel adducts previously formed from oxindole, pyrazolone, nitromethane, N,N-dimethylbarbituric acid or indanedione. This methodology differs from the previous classical methods in its simplicity and ready availability of the catalyst. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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