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http://hdl.handle.net/10773/18123| Title: | Actions of bisnucleophiles on (E)-3-[3-(2-Hydroxyaryl)-3-oxoprop-1-en-1-yl]chromones: versatile transformations into oxygen-and nitrogen-containing heterocycles |
| Author: | Hassaine, Ridha Talhi, Oualid Taibi, Nadia Almeida Paz, Filipe A. Bensaid, Okkacha Bachari, Khaldoun Silva, Artur M. S. |
| Keywords: | Chromones α,β-unsaturated carbonyl systems Michael additions Bisnucleophiles X-ray diffraction Heterocycles 2D NMR |
| Issue Date: | 2016 |
| Publisher: | Georg Thieme Verlag |
| Abstract: | The transformations of (E)-3-[3-(2-hydroxyaryl)-3-oxoprop- 1-en-1-yl]chromones in the presence of methylhydrazine and aromatic bisnucleophiles are described. The reactions generally lead to chromone ring transformation via pyrone ring-opening and heterocyclization to give novel diazoles and (Z)-3-aminomethylenechromanones, respectively. Piperazine catalyzes chromanone ring closure of the starting substrate to afford chromone–chromanone dyads. |
| Peer review: | yes |
| URI: | http://hdl.handle.net/10773/18123 |
| DOI: | 10.1055/s-0035-1560829 |
| ISSN: | 0936-5214 |
| Appears in Collections: | CICECO - Artigos |
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