Synthesis and fluorescent properties of 2-arylamino-5-(3-aryl-1-phenyl- pyrazol-4-yl)-1,3,4-thiadiazoles

Article abstract of DOI:10.1002/jccs.200800196

A series of novel pyrazolyl-substituted 1,3,4-thiadiazole derivatives (6a-6d, 7a-7d, 8a-8d) were prepared by cyclization of the intermediate 3-aryl-l-phenyl-pyrazol-4-ylformaldehyde 4′-phenylthiosemicarbazones with 0.5 M ferric chloride solution. The structures of the new compounds were confirmed by IR, ¹H NMR and elemental analysis. Simultaneously, the compounds were detected by fluorescence spectrophotometer and had preferable fluorescence activity.