Turkish Journal of Chemistry
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).
DOI
10.3906/kim-1410-41
Keywords
Chromone-3-carboxylic acid, benzoxocinone, pyranochromenes, ring expansion, carbon nucleophiles
First Page
412
Last Page
425
Recommended Citation
IBRAHIM, M. A, & ALI, T. E (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 39 (2): 412-425. https://doi.org/10.3906/kim-1410-41
