R. Araya-Maturana, José A. Gavín-Sazatornil, Jorge Heredia-Moya
Jun 1, 2005
Citations
0
Influential Citations
7
Citations
Journal
Journal of the Brazilian Chemical Society
Abstract
A systematic study about the long-range correlations observed in the HMBC spectra of a series of cis and trans 3-(4-oxo-4H-chromen-3-yl)-acrylic acid ethyl esters, and 5-hydroxy derivatives, was carried out. The results were compared with those observed in IMPEACH-MBC and CIGARHMBC spectra. An uncommon 5JC,H between the methyl protons and the Ca to the carbonyl group was observed in these systems as well as in ethyl chrotonate. The complete assignments of the 1H and 13C NMR spectra are provided.