Structural elucidation of polymethoxyflavones from shift reagent proton NMR measurements |
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| Authors: | P. Joseph-Nathan D. Abramo-Bruno Ma.A. Torres |
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| Affiliation: | Departamento de Química del Centro de Investigación y de Estudios Avanzados, Instituto Politécnico Nacional, P.O. Box 14-740, México 14, D.F., México |
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| Abstract: | The quantitative shift reagent behavior of polymethoxylated flavones in the presence of Pr(fod)3 shows that for structural elucidation of these molecules the degree of substitution in the neighborhood of the carbonyl group can be determined from the number of signals that are strongly shifted and broadened. The induced shifts of the remaining signals are of complementary help and even the resonances of individual methoxyl groups can be ascribed. |
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| Keywords: | shift reagents structural elucidation. |
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