Journal
SYNTHETIC COMMUNICATIONS
Volume 51, Issue 19, Pages 2991-3003Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/00397911.2021.1958231
Keywords
Antimicrobial evaluation; cyclocondensation; nucleophilic reactions; pyrazoles; pyrimidines; Vilsmeier-Haack
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The study synthesized N-pyrimidinylacetamide and beta-chloroenaldehyde derivatives, and investigated their applications in chemical reactions and biological activities. These products serve as building blocks for nitrogen heterocyclic compounds.
Acetylation of 2-amino-4-(4-methoxyphenyl)-6-oxo-1,6-dihydropyrimidine-5-carbonitrile (2) using acetic anhydride afforded N-pyrimidinylacetamide derivative 3 which upon formylation using Vilsmeier-Haack reagent produced beta-chloroenaldehyde derivative 4. The chemical behavior of compound 4 was investigated toward some primary amines as well as heterocyclic amines yielding the corresponding Schiff bases. Compound 4 is used as a building block for the construction of nitrogen heterocyclic compounds such as pyrazoles, pyrimidines, pyridopyrimidine and diazepine through its reaction with a diversity of bifunctional nucleophiles such as hydrazines, guanidines, 6-aminouracil and ethylenediamine. The biological activity of the synthesized compounds was investigated. Structures of the newly synthesized products were deduced on the basis of their analytical and spectral data.
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