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Huszár B, Szolga R, Bősze S, Oláhné Szabó R, Simon A, Karaghiosoff K, Czugler M, Drahos L, Keglevich G. Synthesis and Anticancer Activity of Phosphinoylated and Phosphonoylated N-Heterocycles Obtained by the Microwave-Assisted Palladium Acetate-Catalyzed Hirao Reaction. Chemistry 2023; 29:e202302465. [PMID: 37711077 DOI: 10.1002/chem.202302465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 08/28/2023] [Accepted: 09/12/2023] [Indexed: 09/16/2023]
Abstract
A literature survey showed that different derivatives with the 9-phenyl-9H-carbazole or the dihydroindoline scaffold may be of biological activity including cytotoxic effect. Driven by this experience, P-functionalized derivatives of these N-heterocycles were synthesized. Three N-heterocycles, 9-(4-bromophenyl)-9H-carbazole, 3-bromo-9-phenyl-9H-carbazole and 1-(5-bromoindolin-1-yl)ethan-1-one, were coupled with dialkyl phosphites and diarylphosphine oxides using Pd(OAc)2 (10 %) as the catalyst precursor and triethylamine as the base in ethanol under microwave irradiation. The excess of the Y2 P(O)H reagent (Y=alkoxy, aryl) (30 %) served as the P-ligand in its trivalent tautomeric form (Y2 POH), hence there was no need for the usual P-ligands meaning cost and environmental burden. Hence, the presented method is a "green" approach that proved to be more efficient than the preparation by the traditional method. The products, dialkyl phosphonates and tertiary phosphine oxides obtained in 58-84 % yields were characterized, one of them also by single crystal X-ray analysis, and were subjected to in vitro biological activity evaluation. A (carbazol)yl-phenylphosphonate, an N-phenyl-(carbazol)yl-phosphonate, a (carbazol)yl-phenylphosphine oxide and an N-phenyl-(carbazol)ylphosphine oxide revealed a significant cytotoxic activity on A549 human non-small-cell lung carcinoma and MonoMac-6 acute monocytic leukemia cancer cells. The cytotoxic effect was significant as compared to that of the reference compounds.
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Affiliation(s)
- Bianka Huszár
- Department of Organic Chemistry and Technology, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, 1521, Budapest, Hungary
| | - Renáta Szolga
- Department of Organic Chemistry and Technology, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, 1521, Budapest, Hungary
| | - Szilvia Bősze
- Eötvös Loránd Research Network (ELKH), Research Group of Peptide Chemistry, Eötvös Loránd University, 1117, Budapest, Hungary
| | - Rita Oláhné Szabó
- Eötvös Loránd Research Network (ELKH), Research Group of Peptide Chemistry, Eötvös Loránd University, 1117, Budapest, Hungary
- Department of Genetics, Cell-and Immunobiology, Semmelweis University, 1089, Budapest, Nagyvárad tér 4, Hungary
| | - András Simon
- Department of Inorganic and Analytical Chemistry, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, 1521, Budapest, Hungary
| | - Konstantin Karaghiosoff
- Department Chemie, Ludwig-Maximilians-Universitat München, 81377, München, Butenandtstr. 5-13, Germany
| | - Mátyás Czugler
- Department of Organic Chemistry and Technology, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, 1521, Budapest, Hungary
| | - László Drahos
- MS Proteomics Research Group, Research Centre for Natural Sciences, 1117, Budapest, Hungary
| | - György Keglevich
- Department of Organic Chemistry and Technology, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, 1521, Budapest, Hungary
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Abstract
The P-heterocyclic field forms a special part of organophosphorus chemistry,
and is a special discipline within heterocyclic chemistry. The relevant results accumulated
in the group of the author of this minireview in last 5 years are summarized. After
surveying the conformational situation of cyclic phosphinates, their Microwave
(MW)-assisted direct esterification and the T3P®-promoted esterification are discussed.
The next chapters describe newer results regarding the interpretation and modelling of the
rate enhancing effect of MWs, and on an important, but somewhat neglected field, the
hydrolysis of phosphinates. New results on the ring enlargement of 5-membered
unsaturated P-heterocycles to 6-ring species, as well as on the synthesis of
7-phosphanorbornene derivatives, and their refunctionalization are also included. Novel
findings on the preparation of cyclic amides and imides are also explored. Last but not least, the user-friendly
deoxygenations of cyclic phosphine oxides elaborated by us are shown. The reader will be able to discover
green chemical considerations and accomplishments throughout the series of organophosphorus
transformations reviewed.
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Affiliation(s)
- György Keglevich
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, 1521 Budapest, Hungary
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