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Dotsenko VV, Jassim NT, Temerdashev AZ, Abdul-Hussein ZR, Aksenov NA, Aksenova IV. New 6′-Amino-5′-cyano-2-oxo-1,2-dihydro-1′H-spiro[indole-3,4′-pyridine]-3′-carboxamides: Synthesis, Reactions, Molecular Docking Studies and Biological Activity. Molecules 2023; 28:molecules28073161. [PMID: 37049923 PMCID: PMC10096136 DOI: 10.3390/molecules28073161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 03/31/2023] [Accepted: 03/31/2023] [Indexed: 04/05/2023] Open
Abstract
The purpose of this work was to prepare new isatin- and monothiomalondiamide-based indole derivatives, as well as to study the properties of the new compounds. The four-component reaction of 5-R-isatins (R = H, CH3), malononitrile, monothiomalonamide (3-amino-3-thioxo- propanamide) and triethylamine in hot EtOH yields a mixture of isomeric triethylammonium 6′-amino-3′-(aminocarbonyl)-5′-cyano-2-oxo-1,2-dihydro-1′H- and 6′-amino-3′-(aminocarbonyl)- 5′-cyano-2-oxo-1,2-dihydro-3′H-spiro[indole-3,4′-pyridine]-2′-thiolates. The reactivity and structure of the products was studied. We found that oxidation of spiro[indole-3,4′-pyridine]-2′-thiolates with DMSO-HCl system produced only acidification products, diastereomeric 6′-amino-5′-cyano-5-methyl-2-oxo-2′-thioxo-1,2,2′,3′-tetrahydro-1′H-spiro-[indole-3,4′-pyridine]- 3′-carboxamides, instead of the expected isothiazolopyridines. The alkylation of the prepared spiro[indole-3,4′-pyridine]-2′-thiolates upon treatment with N-aryl α-chloroacetamides and α-bromoacetophenones proceeds in a regioselective way at the sulfur atom. In the case of α-bromoacetophenones, ring-chain tautomerism was observed for the S-alkylation products. According to NMR data, the compounds consist of a mixture of stereoisomers of 2′-amino-6′-[(2-aryl-2-oxoethyl)thio]-3′-cyano-2-oxo-1′H-spiro[indoline-3,4′-pyridine]-5′-carboxamides and 5′-amino-3′-aryl-6′-cyano-3′-hydroxy-2-oxo-2′,3′-dihydrospiro[indoline-3,7′-thiazolo[3,2-a]pyridine]-8′-carboxamides in various ratios. The structure of the synthesized compounds was confirmed by IR spectroscopy, HRMS, 1H and 13C DEPTQ NMR studies and the results of 2D NMR experiments (1H-13C HSQC, 1H-13C HMBC). Molecular docking studies were performed to investigate suitable binding modes of some new compounds with respect to the transcriptional regulator protein PqsR of Pseudomonas aeruginosa. The docking studies revealed that the compounds have affinity for the bacterial regulator protein PqsR of Pseudomonas aeruginosa with a binding energy in the range of −5.8 to −8.2 kcal/mol. In addition, one of the new compounds, 2′-amino-3′-cyano-5-methyl-2-oxo-6′-{[2-oxo-2-(p-tolylamino)ethyl]thio}-1′H-spiro-[indoline-3,4′-pyridine]-5′-carboxamide, showed in vitro moderate antibacterial effect against Pseudomonas aeruginosa and good antioxidant properties in a test with 1,1-diphenyl-2-picrylhydrazyl radical. Finally, three of the new compounds were recognized as moderately active herbicide safeners with respect to herbicide 2,4-D in the laboratory experiments on sunflower seedlings.
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Affiliation(s)
- Victor V. Dotsenko
- Department of Organic Chemistry and Technologies, Kuban State University, 149 Stavropolskaya St., 350040 Krasnodar, Russia
- Department of Chemistry, North Caucasus Federal University, 1a Pushkin St., 355017 Stavropol, Russia
| | - Nawras T. Jassim
- Department of Organic Chemistry and Technologies, Kuban State University, 149 Stavropolskaya St., 350040 Krasnodar, Russia
| | - Azamat Z. Temerdashev
- Department of Analytical Chemistry, Kuban State University, 149 Stavropolskaya St., 350040 Krasnodar, Russia
| | - Zainab R. Abdul-Hussein
- Department of Pathological Analyses, College of Science, University of Basra, P.O. Box 49, Basrah 61004, Iraq
| | - Nicolai A. Aksenov
- Department of Chemistry, North Caucasus Federal University, 1a Pushkin St., 355017 Stavropol, Russia
| | - Inna V. Aksenova
- Department of Chemistry, North Caucasus Federal University, 1a Pushkin St., 355017 Stavropol, Russia
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Kurskova AO, Dotsenko VV, Frolov KA, Aksenov NA, Aksenova IV, Krivokolysko BS, Peresypkina AA, Chigorina EA, Krivokolysko SG. Synthesis and Aminomethylation of 2-Amino-4-(2-chlorophenyl)-6-(dicyanomethyl)-1,4-dihydropyridine-3,5-dicarbonitrile N-Methylmorpholinium Salt. RUSS J GEN CHEM+ 2022; 92:779-790. [PMID: 35729943 PMCID: PMC9197094 DOI: 10.1134/s1070363222050061] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Revised: 02/15/2022] [Accepted: 02/17/2022] [Indexed: 12/01/2022]
Abstract
Sequential reaction of 2-chlorobenzaldehyde, cyanothioacetamide, and malononitrile dimer in the presence of an excess of N-methylmorpholine resulted in the formation of N-methylmorphlinium salt of 2-amino-4-(2-chlorophenyl)-6-(dicyanomethyl)-1,4-dihydropyridine-3,5-dicarbonitrile. The resulting salt reacts under Mannich conditions with primary amines and an excess of formaldehyde to form substituted 2-alkylamino-4-(dicyanomethylene)-3,7-diazabicyclo[3.3.1]non-2-ene-1,5-dicarbonitriles. Structure of the key compound was confirmed by single crystal X-ray diffraction analysis.
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Affiliation(s)
- A. O. Kurskova
- ChemEx Laboratory, V. Dahl Lugansk State University, 91034 Lugansk, Ukraine
| | - V. V. Dotsenko
- Kuban State University, 350040 Krasnodar, Russia
- North Caucasian Federal University, 355009 Stavropol, Russia
| | - K. A. Frolov
- ChemEx Laboratory, V. Dahl Lugansk State University, 91034 Lugansk, Ukraine
| | - N. A. Aksenov
- North Caucasian Federal University, 355009 Stavropol, Russia
| | - I. V. Aksenova
- North Caucasian Federal University, 355009 Stavropol, Russia
| | - B. S. Krivokolysko
- Lugansk State Medical University named after St. Luke, 91045 Lugansk, Ukraine
| | - A. A. Peresypkina
- Belgorod State National Research University, 308015 Belgorod, Russia
| | - E. A. Chigorina
- National Research Center “Kurchatov Institute” – IREA, 107076 Moscow, Russia
- National Research Center “Kurchatov Institute”, 123182 Moscow, Russia
| | - S. G. Krivokolysko
- ChemEx Laboratory, V. Dahl Lugansk State University, 91034 Lugansk, Ukraine
- Lugansk State Medical University named after St. Luke, 91045 Lugansk, Ukraine
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Dolganov AA, Levchenko AG, Dahno PG, Guz’ DD, Chikava AR, Dotsenko VV, Aksenov NA, Aksenova IV. 7-Aryl-3-(hydroxymethyl)-5-oxo-1,2,3,5-tetrahydro[1,2,4]triazolo[1,5-a]pyridine-6,8-dicarbonitriles: Synthesis and Predicted Biological Activity. RUSS J GEN CHEM+ 2022. [DOI: 10.1134/s1070363222020074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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