Abstract
An original method has been developed for the synthesis of a number of pyridyl- and quinolylcarbonylarenecarboxylic acids by condensing anhydrides of aromatic dicarboxylic acids with picolinic and quinaldic acids. The characteristics of the IR spectra of the compounds synthesized are given, and their ring-chain equilibrium transformations are discussed. It has been shown that the protonation of the nitrogen atom of the heterocycle stabilizes the cyclic form.
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