Abstract
The article analyzes publications that present the results of studies of modern approaches to the synthesis of new and known heterocycles with a pyrazole fragment, as well as syntheses aimed at expanding the library of compounds of this series from hydrazines, hydrazides, semi- or thiosemicarbazides, diazo compounds, hydrazonyl chlorides. Some examples are shown that use approaches to the synthesis of pyrazoles through multicomponent reactions involving amines and hydroxamic acid or an amine and enaminoketone. References are provided to publications that reflect the results of studies of the biological activity of these heterocycles, the use of certain metals as selective extractants, the possibility of obtaining metal complexes with their participation, as well as some photochemical transformations.
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