期刊
JOURNAL OF INORGANIC BIOCHEMISTRY
卷 189, 期 -, 页码 134-142出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jinorgbio.2018.09.015
关键词
Ferrocenes; Pyrazolones; Antioxidant activity; Antibacterial activity; Antifungal activity; Cyclic voltammetry
资金
- Ministry of Education, Science and Technological Development of the Republic of Serbia [172034, III43004]
A series of ferrocenes which contain dinitrogen-fused pyrazolidinone ring were synthesized from acryloylferrocene (4) and N,N'-cyclic azomethine imines (3). Novel 5-aryl-6-ferrocenoyltetrahydropyrazolo[1,2-a] pyrazol-1(5H)-ones were obtained as mixtures of two diastereoisomers (trans and cis) which were separated and isolated as pure substances. Ortho-substituted N,N'-cyclic azomethine imines 5-oxo-2-(2,4,6-trimethylbenzylidene)pyrazolidin-2-ium-1-ide (3e) and 2-(2-methoxybenzylidene)-5-oxopyrazolidin-2-ium-1-ide (3f) reacted stereoselectively affording only trans-6-ferrocenoy1-5-mesityltetrahydropyrazolo[1,2-a]pyrazol-1(5H)-one (5e) and 6-ferrocenoy1-5-(2-methoxyphenyl)tetrahydropyrazolo[1,2-a]pyrazol-1(5H)-one (5f). Ferrocenyl derivatives were screened for in vitro antioxidant and antifungal activities and excellent DPPH and ABTS radicals scavenging activity was observed with majority of tested 5-aryl-6-ferrocenoyltetrahydropyrazolo[1,2-a] pyrazol-1(511)-ones. Several tested compounds showed selective scavenging properties neutralizing ABTS' radical cations in contrast to inactivity toward DPPH . radicals. Trans-5-aryl-6-ferrocenoyltetrahydropyrazolo [1,2-a]pyrazol-1(514)-ones 5b, 5c, 5d, 5j as well as cis-6-ferrocenoy1-5-(p-tolyfltetrahydropyrazolo[1,2-a]pyrazol-1(511)-one (6d) displayed fungal growth inhibition at low concentration against C. albicans and/or A. brasiliensis. Molecular docking studies revealed that the cis-6-ferrocenoyl-5-(4-nitrophenyl)tetrahydropyrazolo [1,2-a] pyrazol-1(5H)-one (61) and cis-6-ferrocenoy1-5-(naphthalen-2-yl)tetrahydropyrazolo [1,2-a]pyra zol-1(5H-one (6n) have potential to become lead molecules in drug discovery process.
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