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The Configuration Dependent Cyclization of β-2-Hydroxyaroylacrylic Acids
Canadian Journal of Chemistry1971Vol. 49(21), pp. 3477–3482
Abstract
Several alleged chromanone-2-carboxylic acids were reexamined. Some were found to have the assigned structures but others are in fact 2-coumaranonylacetic acids. Diagnostic proof was obtained by analysis of the n.m.r. spectra of the corresponding reduced substances. Useful correlations of the spectra with the structures of the keto acids are proposed.
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