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Benedeković G, Farkas S, Popsavin M, Stanisavljević S, Djokić S, Francuz J, Kojić V, Popsavin V. Synthesis and antiproliferative activity of (-)-cleistenolide, (6S)-cleistenolide and 4-substituted cleistenolide analogues. Bioorg Med Chem 2024; 111:117848. [PMID: 39067378 DOI: 10.1016/j.bmc.2024.117848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2024] [Revised: 07/14/2024] [Accepted: 07/20/2024] [Indexed: 07/30/2024]
Abstract
A new total synthesis of the natural δ-lactone cleistenolide (1) and its (6S)-stereoisomer 2 was achieved starting from d-glucose. Key steps in the synthesis of 1 involved: oxidative cleavage of the C1-C2 bond in partially protected d-glucose derivative (20), and chain extension of resulting aldehyde 20a with a single C2 fragment using (Z)-selective Wittig olefination. Synthesis of 2 involves the following key steps: periodate cleavage of the C5-C6 bond in the commercially available monoacetone d-glucose (24), followed by C2 chain elongation by using the (Z)-selective Wittig olefination. This new approach is also applied to prepare a few new 4-substituted cleistenolide analogues (3 - 18). Compounds 3 - 7 were designed using molecular hybridization, while the remaining eleven analogues were designed using the bioisosterism method. MTT assay showed that most analogues were more active than lead 1 against several malignant cells, but were completely inactive in the culture of normal foetal lung fibroblasts (MRC-5). The K562 cells appeared to be the most sensitive to the synthesized analogues. The strongest antiproliferative activity against this cell line was shown by 4-O-cinnamoyl derivative 3 and 4,6-di-O-benzyl derivative 17, with submicromolar IC50 values (0.76 and 0.67 μM, respectively). Structural features important for the activity of this class of compounds were identified by SAR analysis.
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Affiliation(s)
- Goran Benedeković
- University of Novi Sad, Faculty of Sciences, Department of Chemistry, Biochemistry and Environmental Protection, Trg Dositeja Obradovića 3, 21000 Novi Sad, Serbia
| | - Sándor Farkas
- University of Novi Sad, Faculty of Sciences, Department of Chemistry, Biochemistry and Environmental Protection, Trg Dositeja Obradovića 3, 21000 Novi Sad, Serbia
| | - Mirjana Popsavin
- University of Novi Sad, Faculty of Sciences, Department of Chemistry, Biochemistry and Environmental Protection, Trg Dositeja Obradovića 3, 21000 Novi Sad, Serbia
| | - Sladjana Stanisavljević
- University of Novi Sad, Faculty of Sciences, Department of Chemistry, Biochemistry and Environmental Protection, Trg Dositeja Obradovića 3, 21000 Novi Sad, Serbia
| | - Sanja Djokić
- University of Novi Sad, Faculty of Sciences, Department of Chemistry, Biochemistry and Environmental Protection, Trg Dositeja Obradovića 3, 21000 Novi Sad, Serbia
| | - Jovana Francuz
- University of Novi Sad, Faculty of Sciences, Department of Chemistry, Biochemistry and Environmental Protection, Trg Dositeja Obradovića 3, 21000 Novi Sad, Serbia
| | - Vesna Kojić
- University of Novi Sad, Faculty of Medicine, Oncology Institute of Vojvodina, Put dr Goldmana 4, 21204 Sremska Kamenica, Serbia
| | - Velimir Popsavin
- University of Novi Sad, Faculty of Sciences, Department of Chemistry, Biochemistry and Environmental Protection, Trg Dositeja Obradovića 3, 21000 Novi Sad, Serbia; Serbian Academy of Sciences and Arts, Kneza Mihaila 35, 11000 Belgrade, Serbia.
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Benedeković G, Popsavin M, Radulović NS, Stojanović-Radić Z, Farkas S, Francuz J, Popsavin V. Synthesis and antimicrobial activity of (-)-cleistenolide and analogues. Bioorg Chem 2020; 106:104491. [PMID: 33268006 DOI: 10.1016/j.bioorg.2020.104491] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Revised: 11/08/2020] [Accepted: 11/16/2020] [Indexed: 10/23/2022]
Abstract
Using the "chiral pool" approach, two modified total syntheses of the biologically active δ-lactone cleistenolide (1) have been achieved starting from d-glucose. These approaches also enabled the preparation of novel analogues and derivatives of natural product 1. The applied strategy for the synthesis of 1 involves: the initial degradation of the chiral precursor for a single C-atom, C2-fragment chain extension using Z-selective Wittig reaction, and the final δ-lactonization. All tested cleistenolide analogues displayed antimicrobial activity against a panel of nine microbial strains, most of them superseding the activity of cleistenolide itself, and, in some cases, coming close in value to the observed minimal inhibitory concentrations of chloramphenicol. Increased lipophilicity of the derivatives and the non-sterically congested conjugated lactone moiety were a prerequisite for analogues with high inhibitory activity against S. aureus and, in general, Gram-positive bacteria.
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Affiliation(s)
- Goran Benedeković
- Department of Chemistry, Biochemistry and Environmental Protection, Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovića 3, Novi Sad, Serbia
| | - Mirjana Popsavin
- Department of Chemistry, Biochemistry and Environmental Protection, Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovića 3, Novi Sad, Serbia
| | - Niko S Radulović
- Department of Chemistry, Faculty of Sciences and Mathematics, University of Niš, Višegradska 33, Niš 18000, Serbia
| | - Zorica Stojanović-Radić
- Department of Biology and Ecology, Faculty of Sciences and Mathematics, University of Niš, Višegradska 33, Niš 18000, Serbia
| | - Sándor Farkas
- Department of Chemistry, Biochemistry and Environmental Protection, Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovića 3, Novi Sad, Serbia
| | - Jovana Francuz
- Department of Chemistry, Biochemistry and Environmental Protection, Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovića 3, Novi Sad, Serbia
| | - Velimir Popsavin
- Department of Chemistry, Biochemistry and Environmental Protection, Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovića 3, Novi Sad, Serbia; Serbian Academy of Sciences and Arts, Knez Mihajlova 35, 11000 Belgrade, Serbia.
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Benedeković G, Popsavin M, Kovačević I, Kojić V, Rodić M, Popsavin V. Synthesis, antiproliferative activity and SAR analysis of (-)-cleistenolide and analogues. Eur J Med Chem 2020; 202:112597. [PMID: 32653698 DOI: 10.1016/j.ejmech.2020.112597] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Revised: 06/11/2020] [Accepted: 06/15/2020] [Indexed: 11/17/2022]
Abstract
A new, modified total synthesis of (-)-cleistenolide (1) and sixteen new analogues or derivatives was achieved starting from commercially available 1,2-O-isopropylidene-α-d-glucofuranose. The synthesis of 1 proceeds in six steps and 67% overall yield, using single-carbon atom degradation of a protected chiral precursor, (Z)-selective Wittig olefination, and acid catalyzed δ-lactonization. A new Lewis acid promoted procedure for one-pot O-debenzylation/O-acylation has been developed to complete the synthesis of natural product 1 and selected analogues. The synthesized compounds were tested in vitro to evaluate their cytotoxicity against K562, HL-60, Jurkat, Raji, MCF-7, MDA-MB 231, HeLa, A549, and MRC-5 cell lines. All (-)-cleistenolide analogues exhibited significantly higher cytotoxicity than lead 1 against the majority of cell lines tested. Most of the synthesized compounds are more active than doxorubicin on at least one malignant cell line, but were almost completely inactive against normal MRC-5 cells. The structural features of the tested compounds responsible for their antiproliferative activity have been identified by preliminary SAR analysis.
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Affiliation(s)
- Goran Benedeković
- Department of Chemistry, Biochemistry and Environmental Protection, Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovića 3, Novi Sad, Serbia
| | - Mirjana Popsavin
- Department of Chemistry, Biochemistry and Environmental Protection, Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovića 3, Novi Sad, Serbia
| | - Ivana Kovačević
- Department of Chemistry, Biochemistry and Environmental Protection, Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovića 3, Novi Sad, Serbia
| | - Vesna Kojić
- Oncology Institute of Vojvodina, Faculty of Medicine, University of Novi Sad, Put Dr Goldmana 4, 21204, Sremska Kamenica, Serbia
| | - Marko Rodić
- Department of Chemistry, Biochemistry and Environmental Protection, Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovića 3, Novi Sad, Serbia
| | - Velimir Popsavin
- Department of Chemistry, Biochemistry and Environmental Protection, Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovića 3, Novi Sad, Serbia; Serbian Academy of Sciences and Arts, Knez Mihajlova 35, 11000, Belgrade, Serbia.
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4
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Herndon JW. The chemistry of the carbon-transition metal double and triple bond: Annual survey covering the year 2018. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2019.213051] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Ikeuchi K, Murasawa K, Ohara K, Yamada H. p-Methylbenzyl Group: Oxidative Removal and Orthogonal Alcohol Deprotection. Org Lett 2019; 21:6638-6642. [PMID: 31437002 DOI: 10.1021/acs.orglett.9b02144] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
We describe the practical removal of p-methylbenzyl (MBn) protections of alcohols by treatment with 2,3-dichloro-5,6-dicyano-p-benzoquinone. When a molecule bears benzyl and MBn groups, the oxidant selectively removes the latter groups. Further, the MBn groups tolerate ceric ammonium nitrate, resulting in chemoselective removal of the p-methoxybenzyl group in the presence of the MBn groups. These orthogonal alcohol deprotections would provide novel synthetic strategies of organic compounds.
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Affiliation(s)
- Kazutada Ikeuchi
- School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda 669-1337, Japan.,Department of Chemistry, Faculty of Science, Hokkaido University, North 10, West 8, Kita-ku, Sapporo 060-0810, Japan
| | - Kentaro Murasawa
- School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda 669-1337, Japan
| | - Kenya Ohara
- School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda 669-1337, Japan
| | - Hidetoshi Yamada
- School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda 669-1337, Japan
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