Diclofenac-Based Hydrazones and Spirothiazolidinones: Synthesis, Characterization, and Antimicrobial Properties.

We report here the synthesis, structural characterization, and biological evaluation of novel diclofenac-based hydrazone (4a-f) and spirothiazolidinone (5a-f, 6a-f) derivatives designed as potential antimicrobial agents. The compounds were evaluated in vitro for their antiviral activity against a wide spectrum of DNA and RNA viruses. They were further screened in vitro against different strains of bacteria and fungi.

2-[2-(2,6-Dichloro-anilino)phen-yl]-N-[(2S)-2-methyl-3-oxo-8-phenyl-1-thia-4-aza-spiro-[4.5]dec-4-yl]acetamide.

In the title compound, C(29)H(29)Cl(2)N(3)O(2)S, the phenyl ring is disordered over two orientations with occupancies of 0.55 (3) and 0.45 (3).

2-[2-(2,6-Dichloro-anilino)phen-yl]-N'-(4-propyl-cyclo-hexyl-idene)acetohydrazide.

The asymmetric unit of the title compound, C(23)H(27)Cl(2)N(3)O, contains two crystallographically independent mol-ecules in which the dihedral angles between the benzene rings are 70.1 (3) and 63.8 (3)°.