Pedersoli S, Constantino MG, José da Silva GV. (1)H and (13)C NMR spectral data for a tricyclic derivative of a Diels-Alder adduct.
MAGNETIC RESONANCE IN CHEMISTRY : MRC 2006;
44:83-6. [PMID:
16261505 DOI:
10.1002/mrc.1714]
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Abstract
A complete NMR analysis with full assignment for (1)H and (13)C NMR spectral data for 5-(acetyloxy)-3-hydroxy-9,10-dimethoxy-6-oxo-11-oxatricyclo[6.2.1.0(2,7)]undec-2-yl acetate is described. This compound was prepared by rapid hydrogenation of the unstable Diels-Alder adduct obtained from the reaction between 3,4-dimethoxyfuran and 2,5-diacetoxy-1,4-benzoquinone. Full homonuclear hydrogen coupling constants measurements and molecular mechanics calculations were performed for the determination of the relative stereochemistry.
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