1-Arylidene-2-tetralone (2), obtained from condensation of 2-tetralone and aromatic aldehydes in acetic acid and HCl, on condensation with thiosemicarbazide in acidic and alkaline medium afforded tetrahydro-2H-benzo[e]indazole-2-carbothioamide as trans (3) and cis (4) diastereoisomers of 1-H and 9b-H respectively. The synthesis of new indazolyl-thiazol-4(5H)-ones (5) from trans isomer (3) and α-halo acids is reported. A DFT study along with single crystal X-ray diffraction data of a representative compound (5a) is presented. The chemistry of the reaction of indazole-2-carbothioamides with methyl iodide, DMAD and acetic anhydride is described. Eight newly synthesised compounds were screened for their antibacterial and antifungal activities. Some of the compounds have shown promising antimicrobial activities.
Journal of Molecular Structure – Elsevier
Published: May 15, 2018
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