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Seebacher W, Hoffelner M, Belaj F, Pirker T, Alajlani M, Bauer R, Pferschy-Wenzig EM, Saf R, Weis R. Formation of 5-Aminomethyl-2,3-dihydropyridine-4(1 H)-ones from 4-Amino-tetrahydropyridinylidene Salts. Molecules 2023; 28:6869. [PMID: 37836712 PMCID: PMC10574582 DOI: 10.3390/molecules28196869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 09/25/2023] [Accepted: 09/27/2023] [Indexed: 10/15/2023] Open
Abstract
Various 4-aminotetrahydropyridinylidene salts were treated with aldehydes in an alkaline medium. Their conversion to 5-substituted β-hydroxyketones in a one-step reaction succeeded only with an aliphatic aldehyde. Instead, aromatic aldehydes gave 5-substituted β-aminoketones or a single δ-diketone. The new compounds were characterized using spectroscopic methods and a single crystal structure analysis. Some of them showed anticancer and antibacterial properties.
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Affiliation(s)
- Werner Seebacher
- Pharmaceutical Chemistry, Institute of Pharmaceutical Sciences, University of Graz, Schubertstrasse 1, 8010 Graz, Austria
| | - Michael Hoffelner
- Pharmaceutical Chemistry, Institute of Pharmaceutical Sciences, University of Graz, Schubertstrasse 1, 8010 Graz, Austria
| | - Ferdinand Belaj
- Institute of Chemistry, University of Graz, Schubertstrasse 1, 8010 Graz, Austria
| | - Teresa Pirker
- Pharmacognosy, Institute for Pharmaceutical Sciences, University of Graz, Beethovenstrasse 8, 8010 Graz, Austria (R.B.)
| | - Muaaz Alajlani
- Faculty of Pharmacy, Al-Sham Private University, 011 Damascus, Syria
| | - Rudolf Bauer
- Pharmacognosy, Institute for Pharmaceutical Sciences, University of Graz, Beethovenstrasse 8, 8010 Graz, Austria (R.B.)
| | - Eva-Maria Pferschy-Wenzig
- Pharmacognosy, Institute for Pharmaceutical Sciences, University of Graz, Beethovenstrasse 8, 8010 Graz, Austria (R.B.)
| | - Robert Saf
- Institute for Chemistry and Technology of Materials (ICTM), Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria
| | - Robert Weis
- Pharmaceutical Chemistry, Institute of Pharmaceutical Sciences, University of Graz, Schubertstrasse 1, 8010 Graz, Austria
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Seebacher W, Kaiser M, Mäser P, Saf R, Pferschy-Wenzig EM, Weis R. Benzyl- and dibenzyl tetrahydropyridinylidene ammonium salts with antiplasmodial and antitrypanosomal activity. MONATSHEFTE FUR CHEMIE 2022. [DOI: 10.1007/s00706-022-03003-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
AbstractSeveral 1-benzyl and 1,3-dibenzyl derivatives of tetrahydropyridinylidene salts with differing electron withdrawing substituents at the aromatic residues have been prepared. In addition, the amine moiety in position 4 was varied. The new compounds were investigated for their antiplasmodial and antitrypanosomal activities as well as for their cytotoxicity. They were characterized using FT-IR, HRMS and NMR spectroscopy. Structure–activity relationships including reported compounds are discussed.
Graphical abstract
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Unexpected ring-opening of 2,3-dihydropyridines. MONATSHEFTE FUR CHEMIE 2021. [DOI: 10.1007/s00706-021-02850-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
AbstractThe reaction of 2,3-dihydropyridines with sulfonyl halides surprisingly yielded open chain dienes with sulfonylimine structure. The products were specific out of several possible isomers and, therefore, a separation of isomers was not necessary. All new compounds were characterized using FT-IR spectroscopy, HRMS, and NMR spectroscopy. A bicyclic by-product from the reaction of a 2,3-dihydropyridine with mesyl chloride was isolated and its structure elucidated using a single X-ray crystal analysis. Some biological activities, like antimicrobial and cytotoxic properties were investigated.
Graphic abstract
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Modifications and hybrids of 1,2,3,4-tetrahydropyridinium salts and their antiprotozoal potencies. MONATSHEFTE FUR CHEMIE 2021. [DOI: 10.1007/s00706-021-02847-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
AbstractThe antiprotozoal activity of 1-benzyltetrahydropyridin-4-yliden iminium salts is reported. This paper describes the preparation of a series of analogs from dihydropyridines or dihydrothiopyrans as educts. The new compounds were investigated for their activity against Plasmodium falciparum NF54, a causative organism of Malaria tropica and Trypanosoma brucei rhodesiense, the causative organism of Human African Trypanosomiasis (sleeping sickness). Several structure–activity relationships were detected. Both the substituents in ring positions 1 and 4 of the tetrahydropyridinium moiety had a strong impact on the antiprotozoal activities as well as on the cytotoxicity of compounds against L-6 cells (rat skeletal myoblasts). All new compounds were characterized using FT-IR spectroscopy, HRMS, and NMR spectroscopy.
Graphic abstract
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Petritsch M, Seebacher W, Mohsin NUA, Dolensky J, Hochegger P, Kaiser M, Mäser P, Belaj F, Saf R, Kretschmer N, Alajlani M, Brantner A, Bauer R, Schühly W, Weis R. Preparation of new 1,3-dibenzyl tetrahydropyridinylidene ammonium salts and their antimicrobial and anticellular activities. Eur J Med Chem 2020; 210:112969. [PMID: 33148495 DOI: 10.1016/j.ejmech.2020.112969] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 10/22/2020] [Accepted: 10/25/2020] [Indexed: 11/30/2022]
Abstract
New 1,3 dibenzyl -tetrahydropyridinylidene ammonium salts have been prepared from unsubstituted or N-benzylated tetrahydropyridinylidene ammonium salts. The antiplasmodial and antitrypanosomal activities as well as their cytotoxic effects were determined using microplate assays. In addition, their activities against two gram positive and two gram negative bacteria strains and a yeast strain were examined. Furthermore, anticancer effects against two cell lines were investigated. Physicochemical parameters were calculated and structure-activity-relationships discussed. One compound showed antiplasmodial activity against a multiresistant strain of Plasmodium falciparum in subnanomolar concentration. Antitrypanosomal activities were detected in low nanomolar concentrations. A single compound was active against grampositive and gramnegative bacteria, as well as yeast. One compound inhibited the growth of a HCT cell line in low concentration.
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Affiliation(s)
- Markus Petritsch
- Institute of Pharmaceutical Sciences, Pharmaceutical Chemistry, University of Graz, Schubertstrasse 1, 8010 Graz, Austria
| | - Werner Seebacher
- Institute of Pharmaceutical Sciences, Pharmaceutical Chemistry, University of Graz, Schubertstrasse 1, 8010 Graz, Austria.
| | - Noor-Ul-Amin Mohsin
- Faculty of Pharmaceutical Sciences, Government College University, Allama Iqbal Road, 38000, Faisalabad, Pakistan
| | - Johanna Dolensky
- Institute of Pharmaceutical Sciences, Pharmaceutical Chemistry, University of Graz, Schubertstrasse 1, 8010 Graz, Austria
| | - Patrick Hochegger
- Institute of Pharmaceutical Sciences, Pharmaceutical Chemistry, University of Graz, Schubertstrasse 1, 8010 Graz, Austria
| | - Marcel Kaiser
- Swiss Tropical and Public Health Institute, Socinstrasse 57, 4002, Basel, Switzerland; University of Basel, Petersplatz 1, 4003, Basel, Switzerland
| | - Pascal Mäser
- Swiss Tropical and Public Health Institute, Socinstrasse 57, 4002, Basel, Switzerland; University of Basel, Petersplatz 1, 4003, Basel, Switzerland
| | - Ferdinand Belaj
- Institute of Chemistry, University of Graz, Universitätsplatz 1, 8010, Graz, Austria
| | - Robert Saf
- Institute for Chemistry and Technology of Organic Materials (ICTM), Graz University of Technology, Stremayrgasse 9, 8010, Graz, Austria
| | - Nadine Kretschmer
- Institute of Pharmaceutical Sciences, Pharmacognosy, University of Graz, Universitätsplatz 4, 8010, Graz, Austria
| | - Muaaz Alajlani
- Department of Pharmaceutical Biology/Pharmacognosy, Institute of Pharmacy, University of Halle-Wittenberg, Hoher Weg 8, 06120, Halle, Germany
| | - Adelheid Brantner
- Institute of Pharmaceutical Sciences, Pharmacognosy, University of Graz, Universitätsplatz 4, 8010, Graz, Austria
| | - Rudolf Bauer
- Institute of Pharmaceutical Sciences, Pharmacognosy, University of Graz, Universitätsplatz 4, 8010, Graz, Austria
| | - Wolfgang Schühly
- Institute of Zoology, Pharmacognosy, University of Graz, Universitätsplatz 2/1, 8010, Graz, Austria
| | - Robert Weis
- Institute of Pharmaceutical Sciences, Pharmaceutical Chemistry, University of Graz, Schubertstrasse 1, 8010 Graz, Austria
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Hoffelner M, Petritsch M, Ahmad S, Seebacher W, Dolensky J, Hochegger P, Kaiser M, Mäser P, Saf R, Weis R. New derivatives of 3-azabicyclo[3.2.2]nonanes and their antiprotozoal activities. MONATSHEFTE FUR CHEMIE 2019. [DOI: 10.1007/s00706-019-02509-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Mohsin NUA, Seebacher W, Hochegger P, Faist J, Saf R, Kaiser M, Mäser P, Weis R. Synthesis of new 1-benzyl tetrahydropyridin-4-ylidene piperidinium salts and their antiplasmodial and antitrypanosomal activities. Med Chem Res 2019. [DOI: 10.1007/s00044-019-02331-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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Mohsin NUA, Seebacher W, Faist J, Hochegger P, Kaiser M, Mäser P, Belaj F, Saf R, Kretschmer N, Alajlani M, Turek I, Brantner A, Bauer R, Bucar F, Weis R. Synthesis of new 1-benzyl tetrahydropyridinylidene ammonium salts and their antimicrobial and anticellular activities. Eur J Med Chem 2018; 143:97-106. [DOI: 10.1016/j.ejmech.2017.11.025] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Revised: 11/07/2017] [Accepted: 11/08/2017] [Indexed: 11/16/2022]
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Mohsin NUA, Seebacher W, Faist J, Kretschmer N, Bauer R, Saf R, Kaiser M, Mäser P, Weis R. Modifications on tetrahydropyridin-4-ylidene ammonium salts and their antiprotozoal activities. MONATSHEFTE FUR CHEMIE 2017. [DOI: 10.1007/s00706-017-2111-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Seebacher W, Belaj F, Faist J, Saf R, Bucar F, Turek I, Brantner A, Alajlani M, Kaiser M, Mäser P, Weis R. Synthesis of new pyrido-benzodiazepine salts and their antimicrobial activities. MONATSHEFTE FÜR CHEMIE - CHEMICAL MONTHLY 2017; 148:263-274. [DOI: https:/doi.org/10.1007/s00706-016-1864-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/08/2023]
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