Turkish Journal of Chemistry
DOI
10.3906/kim-1410-41
Abstract
Unexpected routes to synthesize functionalized benzoxocinones and heteroannulated pyranochromenes were achieved via transformations of the \gamma-pyrone ring in chromone-3-carboxylic acid throughout its reactions with some acyclic and cyclic carbon nucleophiles. A key part of the reaction mechanisms is discussed. Structures of the new synthesized products were established on the basis of elemental analysis and spectral data (IR, MS, and ^1H and ^{13}C NMR).
Keywords
Chromone-3-carboxylic acid, benzoxocinone, pyranochromenes, ring expansion, carbon nucleophiles
First Page
412
Last Page
425
Recommended Citation
IBRAHIM, MAGDY AHMED and ALI, TARIK EL-SAYED
(2015)
"Ring opening and ring closure reactions of chromone-3-carboxylic acid: unexpected routes to synthesize functionalized benzoxocinones and heteroannulated pyranochromenes,"
Turkish Journal of Chemistry: Vol. 39:
No.
2, Article 18.
https://doi.org/10.3906/kim-1410-41
Available at:
https://journals.tubitak.gov.tr/chem/vol39/iss2/18
