Synthesis and biological properties of ylidene derivatives of thiazol[3,2-a]imidazol-6-one

Synthesis and Biological Activity of Some 3,5‐Diaryl‐1‐Benzothiazolopyrazoline Derivatives: Reaction of Chalcones with 2‐Hyrazinobenzothiazoles

“…Obtained as white crystals in 76% yield, m.p. 250-251 • C; 1 (21)(22)(23)(24)(25)(26)(27)(28)(29)(30)(31)(32)(33)(34)(35)(36)(37)(38)(39)(40) there is no carbonyl absorption but absorption bands in the region 1600-1450 cm -1 due to the presence of C=C and C=N stretching vibrations. Stretching vibrations due to the intramolecular hydrogen bonding of -OH group gave absorption in the region 3000-2500 cm -1 .…”

“…Benzothiazole and its derivatives [23][24][25][26][27] have been recognized as a class of medicinal importance. Benzothiazoles have also been screened for their antituberculostic activity 28 . Benzothiazole derivatives represent an extensive group of heterocyclic compounds, several of which have already found application in the medical sphere as medicines 29 as well as in agriculture 30,31 .…”