On the basis of available ethynyl vinyl ketones and arylhydrazines, the authors have developed the two-stage synthesis method for styrylpyrazoles possessing fluorescent abilities, as well as the gram-scale synthesis method for fluorescent probes.
The synthesis of chalcogenated pyrazole-fused isocoumarins and ninhydrin-based hydrazones was accomplished using the same starting materials by changing the solvent and temperature of the reactions.
A highly effective method for synthesizing N-arylhydrazones by means of light-promoted C–N coupling of (hetero)aryl halides with benzophenone hydrazone with catalysis by a Ni(II)–aryl halide complex was reported.
An electrochemical anodic oxidation approach was adopted to synthesize a variety of 1H-indazole derivatives in moderate to good yields.
Synthesis of five novel copper–arylhydrazone complexes and their catalytic activity for microwave-assisted click reaction in water and glycerol.