Features of the reaction of heterocyclic analogs of chalcone with lanthanide shift reagents

Abstract

The PMR spectra of heterocyclic analogs of 2-hydroxychalcone containing thiazole, benzofuran, triazole, imidazole, benzodioxane, or pyridine rings in the presence of lanthanide shift reagents are studied. It is found that the most effective reagent for modifying the spectra of these compounds is Yb(fod)₃. The broadening of the spectra of 2-hydroxy chalcones in the presence of lanthanide shift reagents is explained by the dynamic effects of complex formation. An example is given of the determination of the conformation of molecules of 2-hydroxychalcone by the simultaneous use of lanthanide shift reagents and the homonuclear Overhauser effect.

How to Cite
urov, A. V.; Khilya, V. P. Chem. Heterocycl. Compd. 1994, 30, 399. [Khim. Geterotsikl. Soedin. 1994, 457.]

For this article in the English edition, see DOI https://doi.org/10.1007/BF01169931