Ferrocenyl chalcones with O-alkylated vanillins: synthesis, spectral characterization, microbiological evaluation, and single-crystal X-ray analysis

O-alkylated vanillin derivatives 2a-f and acetylferrocene react under Claisen-Schmidt conditions, resulting in good-to-high yields of the corresponding ferrocene chalcones 3a-f. None of the resultant compounds 3b-f has been previously described in the literature. All synthesized compounds were characterized by spectral and physical data, whereas two of them, 1-ferrocenyl-3-(4-ethoxy-3-methoxyphenyl)-prop-2-en-1-one (3b) and 1-ferrocenyl-3-(4-buthoxy-3-methoxy-phenyl)-prop-2-en-1-one (3e), were crystalline substances, suitable for single-crystal X-ray analysis, which confirmed undoubtedly their structures. Chalcones 3a-f were tested for their biological activity and demonstrated relatively good in vitro antimicrobial activity towards different strains of bacteria and fungi. The best antibacterial activity is expressed by compounds 3b and 3c, while compound 3d shows the best antifungal activity

Pyrazoline derivatives of acryloyl substituted ferrocenyl ketones: Synthesis, antimicrobial activity and structural properties

A series of ferrocenyl ketones were synthesized in reaction with ferrocene and corresponding substituted acryloyl chlorides, following previously described procedure. Synthesized products have conjugated enone system, which is suitable for further transformations. In a reaction with hydrazine in acidic medium (acetic acid) new pyrazoline derivatives were obtained. Their antimicrobial properties have been tested. Synthesized pyrazoline derivatives demonstrated expressed in vitro antimicrobial activity towards 12 strains of microorganisms inhibiting all tested bacteria and fungi. The most potent compound in all cases was sorbyl derivative; for bacteria activity was very close to streptomycin, and for fungi in one case the same as ketoconazole. It is established that this compound can be a new, potential antimicrobial agent with minimum inhibitory concentrations from 0.039 to 0.312 mg/mL. One of the starting compounds and two products were crystal substances, suitable for the single crystal X-ray diffraction analysis, which confirmed undoubtedly their structures. (C) 2017 Elsevier B.V. All rights reserved

Dehydrozingerone based 1-acetyl-5-aryl-4,5-dihydro-1H-pyrazoles: Synthesis, characterization and anticancer activity

A small series of 1-acetyl-5-aryl-4,5-dihydro-1H-pyrazoles (aryl = 4-hydroxy-3-methoxyphenyl and 4-alkoxy-3-methoxyphenyl) was prepared, starting from 4-(4-hydroxy-3-methoxyphenyl)-3-buten-2-one, dehydrozingerone, and its alkyl derivatives. Their in vitro cytotoxic activity against some cancer cell lines was tested, showing significant anticancer activity. All the new compounds were well characterized by IR, H-1, C-13 NMR and ESI-MS spectroscopy and physical data, whereas structures of two of them were determined by single crystal X-ray analysis. (C) 2016 Elsevier B.V. All rights reserved

Cytotoxic and Antimicrobial Activity of Dehydrozingerone based Cyclopropyl Derivatives

A small series of 1-acetyl-2-(4-alkoxy-3-methoxyphenyl)cyclopropanes was prepared, starting from dehydrozingerone (4-(4-hydroxy-3-methoxyphenyl)-3-buten-2-one) and its O-alkyl derivatives. Their microbiological activities toward some strains of bacteria and fungi were tested, as well as their in vitro cytotoxic activity against some cancer cell lines (HeLa, LS174 and A549). All synthesized compounds showed significant antimicrobial activity and expressed cytotoxic activity against tested carcinoma cell lines, but they showed no significant influence on normal cell line (MRC5). Butyl derivative is the most active on HeLa cells (IC50 = 8.63 m), while benzyl one is active against LS174 and A549 cell lines (IC50 = 10.17 and 12.15 m, respectively)