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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
Paz, Filipe A. Almeida
Bensaid, Okkacha
Bachari, Khaldoun
Silva, Artur M. S.
Keywords: Chromones
α,β-unsaturated carbonyl systems
Michael additions
X-ray diffraction
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
DOI: 10.1055/s-0035-1560829
ISSN: 0936-5214
Appears in Collections:CICECO - Artigos

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