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Reszka M, Serdiuk IE, Kozakiewicz K, Nowacki A, Myszka H, Bojarski P, Liberek B. Influence of a 4'-substituent on the efficiency of flavonol-based fluorescent indicators of β-glycosidase activity. Org Biomol Chem 2020; 18:7635-7648. [PMID: 32960207 DOI: 10.1039/d0ob01505a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This article presents novel fluorescent probes, based on the excited-state intramolecular proton transfer (ESIPT) phenomenon and flavonols, sensitive to the action of specific glycosidases. 4'-Substituted flavonols were synthesized, using various approaches, and glycosylated with d-glucose, N-acetyl-d-glucosamine and d-glucuronic acid. Evaluation of the β-glycosidase activities was performed in neutral and acidic pH. In all the cases examined, an acidic environment accelerated enzymatic hydrolysis. It was demonstrated that the 4'-chloroflavonyl glycosides of all sugars tested, both in neutral and acidic pH, are the ones most sensitive to the presence of hydrolase. In turn, 4'-dimethylaminoflavonyl glucoside is not sensitive to glucosidase action at all. Generally, the rate of enzymatic hydrolysis increases as the electron-withdrawing nature of the 4'-substituent increases. An exception is the trifluoromethyl group which, in spite of having the most favourable Hammett constant, does not contribute enough to increase the rate of hydrolysis of its glucoside. The presented experimental results are supported by the electrostatic potential (ESP) analysis and related to the mechanisms of glycoside bond enzymatic hydrolysis.
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Affiliation(s)
- Milena Reszka
- Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland.
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Grzywacz D, Paduszyńska M, Norkowska M, Kamysz W, Myszka H, Liberek B. N-Aminoacyl and N-hydroxyacyl derivatives of diosgenyl 2-amino-2-deoxy-β-d-glucopyranoside: Synthesis, antimicrobial and hemolytic activities. Bioorg Med Chem 2019; 27:114923. [PMID: 31153729 DOI: 10.1016/j.bmc.2019.05.036] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Revised: 05/21/2019] [Accepted: 05/24/2019] [Indexed: 12/12/2022]
Abstract
Diosgenyl 2-amino-2-deoxy-β-d-glucopyranoside is a semisynthetic saponin with antimicrobial and antitumor activities. To search for more effective analogues, N-aminoacyl and N-hydroxyacyl derivatives of this saponin were synthesized conventionally and with microwave assistance, and tested against the human pathogenic fungi and Gram-positive and Gram-negative bacteria. None of the tested compounds exhibit activity against Gram-negative bacteria. Almost all of the synthesized N-aminoacyl saponins exhibit antifungal activity and act effectively against Gram-positive bacteria, some better than the parent compound. The best acting saponins are the same size and possess sarcosine or l- or d-alanine attached to the parent glucosaminoside. Shorter and longer aminoacyl residues are less advantageous. d-Alanine derivative is the most effective against Gram positive bacteria. Structure-activity relationship (SAR) analysis indicates that the free α-amino group in aminoacyl residue is necessary for antimicrobial activities of the tested saponins. (N-Acetyl)aminoacyl and N-hydroxyacyl analogs are inactive. Measurements of the hemolytic activities demonstrate that the best acting saponins are not toxic towards human red blood cells.
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Affiliation(s)
- Daria Grzywacz
- Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland
| | | | - Monika Norkowska
- Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - Wojciech Kamysz
- Faculty of Pharmacy, Medical University of Gdańsk, Hallera 107, 80-416 Gdańsk, Poland
| | - Henryk Myszka
- Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - Beata Liberek
- Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland.
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Dawgul MA, Grzywacz D, Liberek B, Kamysz W, Myszka H. Activity of Diosgenyl 2-amino-2-deoxy-β-D-glucopyranoside, its Hydrochloride, and N,N-dialkyl Derivatives Against Non-albicans Candida Isolates. Med Chem 2018; 14:460-467. [PMID: 29485003 DOI: 10.2174/1573406414666180226164747] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Revised: 01/05/2018] [Accepted: 01/06/2018] [Indexed: 11/22/2022]
Abstract
BACKGROUND Candida albicans belongs to the most common fungal pathogens in humans, but recently an increased proliferation of strains called non-albicans Candida has been reported. Species belonging to this group are often characterised by a reduced susceptibility to antifungal agents. OBJECTIVE In view of the emergence of non-albicans Candida and their resistance to available antifungals, an attempt has been made to develop novel effective agents. Biological activities of the N,N-dialkyl diosgenyl glycosides, which were previously synthesized, were determined. METHOD Minimum inhibitory concentration (MIC) was determined for group of clinical nonalbicans Candida isolates by serial dilution method in Sabouraud liquid medium. In order to assess the toxicity towards human cells the minimum haemolytic concentration (MHC) was determined on human erythrocytes by serial dilution method in phosphoric buffer. RESULTS The saponins exhibited a strong activity towards clinical isolates of C. glabrata and C. parapsilosis comparable or even stronger than that of conventional antimicrobials. A high rate of resistance to fluconazole was shown among C. glabrata isolates. Among clinical strains of C. krusei and C. tropicalis, isolates with a decreased susceptibility to saponins were identified. All the tested C. krusei isolates showed resistance to fluconazole, while among C. tropicalis numerous strains were resistant to all tested azoles. The saponins did not show haemolytic activities at their microbiologically active concentrations. CONCLUSION Results of the present work encourage to continue the study on steroidal saponins and their potential application for the treatment of candidemia.
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Affiliation(s)
- Malgorzata A Dawgul
- Department of Inorganic Chemistry, Faculty of Pharmacy, Medical University of Gdansk, Al. Gen. Hallera 107, 80-416 Gdansk, Poland
| | - Daria Grzywacz
- Laboratory of Glycochemistry, Department of Organic Chemistry, Faculty of Chemistry, University of Gdansk, Wita Stwosza 63, 80-308 Gdansk, Poland
| | - Beata Liberek
- Laboratory of Glycochemistry, Department of Organic Chemistry, Faculty of Chemistry, University of Gdansk, Wita Stwosza 63, 80-308 Gdansk, Poland
| | - Wojciech Kamysz
- Department of Inorganic Chemistry, Faculty of Pharmacy, Medical University of Gdansk, Al. Gen. Hallera 107, 80-416 Gdansk, Poland
| | - Henryk Myszka
- Laboratory of Glycochemistry, Department of Organic Chemistry, Faculty of Chemistry, University of Gdansk, Wita Stwosza 63, 80-308 Gdansk, Poland
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Myszka H, Sokołowska P, Cieślińska A, Nowacki A, Jaśkiewicz M, Kamysz W, Liberek B. Diosgenyl 2-amino-2-deoxy-β-D-galactopyranoside: synthesis, derivatives and antimicrobial activity. Beilstein J Org Chem 2017; 13:2310-2315. [PMID: 29181110 PMCID: PMC5687012 DOI: 10.3762/bjoc.13.227] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Accepted: 10/06/2017] [Indexed: 01/11/2023] Open
Abstract
The synthesis of diosgenyl 2-amino-2-deoxy-β-D-galactopyranoside is presented for the first time. This synthetic saponin was transformed into its hydrochloride as well as N-acyl, 2-ureido, N-alkyl, and N,N-dialkyl derivatives. Antifungal and antibacterial studies show that some of the obtained compounds are active against Gram-positive bacteria and Candida type fungi.
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Affiliation(s)
- Henryk Myszka
- Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - Patrycja Sokołowska
- Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - Agnieszka Cieślińska
- Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - Andrzej Nowacki
- Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - Maciej Jaśkiewicz
- Faculty of Pharmacy, Medical University of Gdańsk, Hallera 107, 80-416 Gdańsk, Poland
| | - Wojciech Kamysz
- Faculty of Pharmacy, Medical University of Gdańsk, Hallera 107, 80-416 Gdańsk, Poland
| | - Beata Liberek
- Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland
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Walczak D, Nowacki A, Trzybiński D, Samaszko-Fiertek J, Myszka H, Sikorski A, Liberek B. Conformational studies of N-(α-d-glucofuranurono-6,3-lactone)- and N-(methyl β-d-glucopyranuronate)-p-nitroanilines. Carbohydr Res 2017; 446-447:85-92. [PMID: 28554013 DOI: 10.1016/j.carres.2017.05.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Revised: 04/28/2017] [Accepted: 05/13/2017] [Indexed: 10/19/2022]
Abstract
N-(α-d-Glucofuranurono-6,3-lactone)-p-nitroaniline and N-(methyl β-d-glucopyranuronate)-p-nitroaniline were obtained as crystalline solids. The single-crystal X-ray diffraction, NMR data and DFT calculations for N-(α-d-glucofuranurono-6,3-lactone)-p-nitroaniline indicate that this N-furanoside adopts a 3T2/3E-like conformation in the crystal lattice, solution and gas phase. Thus, the structure of recorded for N-furanoside 1H NMR spectrum is indicative of the 3T2/3E region of the pseudorotational itinerary for furanose derivatives with α-d-gluco, β-L-ido and α-d-xylo configurations. Moreover, it is concluded that the 1T2/E2/3T2/3E region of the pseudorotational itinerary for furanose derivatives with d-gluco, L-ido and d-xylo configurations should be characterised by the lack of coupling between H2 and H3 protons, irrespective of the anomeric configuration. Such a lack of vicinal coupling is characteristic for some of the trans-oriented furanose ring protons. The single-crystal X-ray diffraction and NMR data for N-(methyl β-d-glucopyranuronate)-p-nitroaniline indicate that this N-glucuronide adopts the 4C1 conformation, both in the crystal lattice and solution. The occurrence of anomeric effects in the presented N-glycosides is discussed. The crystal structure analysis of both N-glycosides gives evidence that the amine group in p-nitroaniline is planar due to the nitrogen sp2 hybridisation.
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Affiliation(s)
- Dominik Walczak
- Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - Andrzej Nowacki
- Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - Damian Trzybiński
- Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland; Biological and Chemical Research Centre, University of Warsaw, Żwirki i Wigury 101, 02-089 Warsaw, Poland
| | | | - Henryk Myszka
- Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - Artur Sikorski
- Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - Beata Liberek
- Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland.
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Cyman M, Wielińska J, Myszka H, Trzybiński D, Sikorski A, Nowacki A, Liberek B. Influence of the oxime and anomeric configurations on the stability of 2-deoxy-2-hydroxyimino- d -hexopyranosides. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2016.07.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Serdiuk IE, Reszka M, Myszka H, Krzymiński K, Liberek B, Roshal AD. Flavonol-based fluorescent indicator for determination of β-glucosidase activity. RSC Adv 2016. [DOI: 10.1039/c6ra06062e] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A flavonol-based ESIPT fluorescence probe for evaluation of β-glucosidase activity was synthesized and tested for sensitivity to enzymatic cleavage at different conditions.
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Affiliation(s)
- Illia E. Serdiuk
- Department of Chemistry
- University of Gdańsk
- 80-308 Gdańsk
- Poland
- Institute of Chemistry
| | - Milena Reszka
- Department of Chemistry
- University of Gdańsk
- 80-308 Gdańsk
- Poland
| | - Henryk Myszka
- Department of Chemistry
- University of Gdańsk
- 80-308 Gdańsk
- Poland
| | | | - Beata Liberek
- Department of Chemistry
- University of Gdańsk
- 80-308 Gdańsk
- Poland
| | - Alexander D. Roshal
- Institute of Chemistry
- V. N. Karazin Kharkiv National University
- Kharkiv
- 61022 Ukraine
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Walczewska A, Grzywacz D, Bednarczyk D, Dawgul M, Nowacki A, Kamysz W, Liberek B, Myszka H. N-Alkyl derivatives of diosgenyl 2-amino-2-deoxy-β-D-glucopyranoside; synthesis and antimicrobial activity. Beilstein J Org Chem 2015; 11:869-74. [PMID: 26124888 PMCID: PMC4464337 DOI: 10.3762/bjoc.11.97] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Accepted: 04/17/2015] [Indexed: 11/23/2022] Open
Abstract
Diosgenyl 2-amino-2-deoxy-β-D-glucopyranoside is a synthetic saponin exhibiting attractive pharmacological properties. Different pathways tested by us to obtain this glycoside are summarized here. Moreover, the synthesis of N-alkyl and N,N-dialkyl derivatives of the glucopyranoside is presented. Evaluation of antibacterial and antifungal activities of these derivatives indicates that they have no inhibitory activity against Gram-negative bacteria, whereas many of the tested N-alkyl saponins were found to inhibit the growth of Gram-positive bacteria and human pathogenic fungi.
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Affiliation(s)
- Agata Walczewska
- Department of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - Daria Grzywacz
- Department of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - Dorota Bednarczyk
- Department of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - Małgorzata Dawgul
- Department of Pharmacy, Medical University of Gdańsk, Hallera 107, 80-416 Gdańsk, Poland
| | - Andrzej Nowacki
- Department of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - Wojciech Kamysz
- Department of Pharmacy, Medical University of Gdańsk, Hallera 107, 80-416 Gdańsk, Poland
| | - Beata Liberek
- Department of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - Henryk Myszka
- Department of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland
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Norkowska M, Myszka H, Cyman M, Grzywacz D, Trzybiński D, Sikorski A, Liberek B. 2,3,4,6-tetra-O-Acetyl-D-Gluconic Acid: Crystal Structure and Application in the Synthesis of N-(D-gluconyl) Derivatives of D-Glucosamine. J Carbohydr Chem 2014. [DOI: 10.1080/07328303.2013.872790] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Monika Norkowska
- a Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, PL-80-308 Gdańsk , Poland
| | - Henryk Myszka
- a Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, PL-80-308 Gdańsk , Poland
| | - Magdalena Cyman
- a Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, PL-80-308 Gdańsk , Poland
| | - Daria Grzywacz
- a Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, PL-80-308 Gdańsk , Poland
| | - Damian Trzybiński
- a Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, PL-80-308 Gdańsk , Poland
| | - Artur Sikorski
- a Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, PL-80-308 Gdańsk , Poland
| | - Beata Liberek
- a Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, PL-80-308 Gdańsk , Poland
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Nowacki A, Myszka H, Liberek B. Conformational studies of diosgenyl 2-amino-2-deoxy-β-d-glucopyranosides at the PM3 and DFT levels of theory. Carbohydr Res 2013; 377:4-13. [DOI: 10.1016/j.carres.2013.05.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2013] [Revised: 05/17/2013] [Accepted: 05/18/2013] [Indexed: 10/26/2022]
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Cirioni O, Myszka H, Dawgul M, Ghiselli R, Orlando F, Silvestri C, Brescini L, Kamysz W, Guerrieri M, Giacometti A. In vitro activity and in vivo efficacy of the saponin diosgenyl 2-amino-2-deoxy-β-D-glucopyranoside hydrochloride (HSM1) alone and in combination with daptomycin and vancomycin against Gram-positive cocci. J Med Microbiol 2011; 60:1337-1343. [PMID: 21511888 DOI: 10.1099/jmm.0.031708-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Surgical site infections are the second most common hospital- and community-acquired Gram-positive infections, with the US Centers for Disease Control and Prevention estimating that about 500 000 surgical site infections occur annually in the USA. The aim of this work was to determine the in vitro activity of the saponin diosgenyl 2-amino-2-deoxy-β-d-glucopyranoside hydrochloride (HSM1) and its bactericidal effect for a large number of Gram-positive cocci, as well as to investigate its in vitro interaction with seven clinically used antibiotics. In vivo, a wound model was established through the panniculus carnosus of BALB/c mice and then inoculated with 5×10(7) c.f.u. Staphylococcus aureus or Enterococcus faecalis. For each bacterial strain, the study included an infected or non-infected group that did not receive any treatment, a group treated with local HSM1, a group treated with intraperitoneal vancomycin, a group treated with intraperitoneal daptomycin and two groups that received HSM1 local treatment plus intraperitoneal vancomycin or daptomycin. All isolates were inhibited by HSM1 at concentrations of 2-32 mg l(-1). Synergy was demonstrated when HSM1 was combined with vancomycin and daptomycin. In in vivo studies, all groups treated with single drugs showed a statistically significant result compared with the control group. The two groups treated with drug combinations showed the highest antimicrobial efficacy. The good in vitro activities and the in vivo efficacy suggest HSM1 as a promising therapeutic candidate in Gram-positive wound infections.
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Affiliation(s)
- Oscar Cirioni
- Institute of Infectious Diseases and Public Health, Università Politecnica delle Marche, Ancona, Italy
| | - Henryk Myszka
- Faculty of Chemistry, University of Gdansk, Gdansk, Poland
| | | | - Roberto Ghiselli
- General Surgery and Surgery Methodology Clinic, Università Politecnica delle Marche - Ospedali Riuniti, Ancona, Italy
| | - Fiorenza Orlando
- Experimental Animal Models for Aging Units, Research Department, INRCA IRRCS, Ancona, Italy
| | - Carmela Silvestri
- Institute of Infectious Diseases and Public Health, Università Politecnica delle Marche, Ancona, Italy
| | - Lucia Brescini
- Institute of Infectious Diseases and Public Health, Università Politecnica delle Marche, Ancona, Italy
| | - Wojciech Kamysz
- Faculty of Pharmacy, Medical University of Gdansk, Gdansk, Poland
| | - Mario Guerrieri
- General Surgery and Surgery Methodology Clinic, Università Politecnica delle Marche - Ospedali Riuniti, Ancona, Italy
| | - Andrea Giacometti
- Institute of Infectious Diseases and Public Health, Università Politecnica delle Marche, Ancona, Italy
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Myszka H, Bednarczyk D, Najder M, Kaca W. Synthesis and induction of apoptosis in B cell chronic leukemia by diosgenyl 2-amino-2-deoxy-beta-D-glucopyranoside hydrochloride and its derivatives. Carbohydr Res 2003; 338:133-41. [PMID: 12526837 DOI: 10.1016/s0008-6215(02)00407-x] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
2-Acetamido-2-deoxy-D-glucose hydrochloride (D-glucosamine hydrochloride) has been used for the preparation of 1,3,4,6-tetra-O-acetyl-2-deoxy-2-trifluoroacetamido-beta- (4) and 2-tetrachlorophthalimido-alpha,beta-D-glucopyranose (6), which have been transformed into the appropriate bromides and the chloride. Both bromo and chloro sugars were used as a glycosyl donors for the glycosylation of diosgenin [(25R)-spirost-5-en-3beta-ol]. These condensations were conducted under mild conditions, using silver triflate as a promoter, and gave diosgenyl glycosides 9 and 12. Each of them was converted into diosgenyl 2-amino-2-deoxy-beta-D-glucopyranoside hydrochloride (11) and N-acylamido derivatives. The structures of all new glycosides were established by 1H and 13C NMR spectroscopy. These diosgenyl glycosides are the first saponins containing the D-glucosamine residue that have been synthesized. These compounds show promising antitumor activities. The synthetic saponins increase the number of apoptotic B cells, in combination with cladribine (2-CdA), that are isolated from chronic lymphotic leukemia (B-CLL) patients.
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Affiliation(s)
- Henryk Myszka
- Faculty of Chemistry, University of Gdańsk, Sobieskiego 18, 80-952 Gdańsk, Poland.
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13
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Bednarczyk D, Kaca W, Myszka H, Serwecińska L, Smiatacz Z, Zaborowski A. The synthesis of diosgenyl 2-amino-2-deoxy-beta-D-glucopyranoside hydrochloride. Carbohydr Res 2000; 328:249-52. [PMID: 11072831 DOI: 10.1016/s0008-6215(00)00199-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The N-trifluoroacetyl- and N-tetrachlorophthaloyl-protected bromide of D-glucosamine has been used for the first time as a glycosyl donor for the glycosylation of diosgenin [(25R)-spirost-5-en-3beta-ol]. Both 1,3,4,6-tetra-O-acetyl-2-deoxy-2-trifluoroacetamido-beta-D-glucopy ranoside and 1,3,4,6-tetra-O-acetyl-2-deoxy-2-tetrachlorophthalimido-alpha,beta -D-glucopyranoside were transformed into the appropriate glycosyl bromides. These reacted with diosgenin under mild conditions, using silver triflate as a promoter, and gave the corresponding protected diosgenyl glycosides. Each was deprotected to give diosgenyl 2-amino-2-deoxy-beta-D-glucopyranoside hydrochloride. The structures of the new glycosides were established by 1H NMR spectroscopy.
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Affiliation(s)
- D Bednarczyk
- Faculty of Chemistry, University of Gdańsk, Poland
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Smiatacz Z, Chrzczanowicz I, Myszka H. Chemical modification of some methyl (3,4-di-O-acetyl-2-deoxy-2-hydroxyimino-α-d-arabino-hexopyranosid)uronates. Carbohydr Res 1997. [DOI: 10.1016/s0008-6215(96)00319-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Smiatacz Z, Chrzczanowicz I, Myszka H, Dokurno P. The Synthesis and Structure of Selected Methyl (3,4-Di-O-acetyl-2-deoxy-2-hydroxyimino-d-arabino-hexopyranosid)urontes. J Carbohydr Chem 1995. [DOI: 10.1080/07328309508005372] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Smiatacz Z, Myszka H. The synthesis, structure, and chemical transformation of methyl esters of O -(3,4-di-O-acetyl-2-deoxy-2-hydroxyimino-d-erythro-pentopyranosyl)-N-tosyl-l-serine, -l-threonine, and -l-tyrosine. Carbohydr Res 1990. [DOI: 10.1016/0008-6215(90)84116-c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Smiatacz Z, Myszka H. Chemical modification of 1-(3,4-di-O-acetyl-2-deoxy-2-hydroxyimino-α- and -β-d-erythro-pentopyranosyl)pyrazole at C-2 and C3. Carbohydr Res 1989. [DOI: 10.1016/0008-6215(89)84048-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Smiatacz Z, Myszka H, Ciunik Z. Configuration and conformation of the products of reaction of 3,4-di-O-acetyl-2-deoxy-2-nitroso-β-d-arabinopyranosyl chloride with pyrazole. Carbohydr Res 1988. [DOI: 10.1016/s0008-6215(00)90852-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Smiatacz Z, Szweda R, Myszka H. The structure and properties of the products of reaction between 3,4,6-tri-O-acetyl-2-deoxy-2-nitroso-α-d-galactopyranosyl chloride and pyrazole. Carbohydr Res 1986. [DOI: 10.1016/s0008-6215(00)90193-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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