The recently developed efficient protocol combining implicit and explicit, accurate quantum mechanical modeling of the condensed state [Katsyuba et al., J. Chem. Phys. 155, 024507 (2021)] is used to describe...

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Reactions of arylchloropyruvic acids esters with aryl-and hetarylhydrazines give rise to pyrazolinedione hydrazones as a result of a tandem condensation of the substituted hydrazines with arylchloropyruvates. In contrast to this process in reaction with hydrazine hydrate a ready reduction unexpectedly occurs by Kizhner Wolff mechanism affording 3-hydroxydihydrocinnamic acid hydrazide as the principal product. The isomeric arylglycidate reacts along the same pattern.

Acid-catalyzed cyclocondensation in a three component system of dichloromethylacetylbenzoylmethanes, urea, and aromatic aldehydes occurred regio-and stereoselectively to give polyfunctional derivatives of perhydropyrimidine.

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