1
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Obaid RJ. New benzimidazole derivatives: Design, synthesis, docking, and biological evaluation. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.104505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
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2
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Khattab RR, Alshamari AK, Hassan AA, Elganzory HH, El-Sayed WA, Awad HM, Nossier ES, Hassan NA. Click chemistry based synthesis, cytotoxic activity and molecular docking of novel triazole-thienopyrimidine hybrid glycosides targeting EGFR. J Enzyme Inhib Med Chem 2021; 36:504-516. [PMID: 33504239 PMCID: PMC8759726 DOI: 10.1080/14756366.2020.1871335] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 11/28/2020] [Accepted: 12/28/2020] [Indexed: 12/24/2022] Open
Abstract
In the current study, new thienopyrimidine conjugates bearing 1,2,3-triazole core and different sugar moieties have been designed and synthesized by Cu(I)-catalysed click dipolar cycloaddition. The cytotoxic activity of the synthesised conjugates 2, 5, 7, and 13-18 was studied against HCT-116 and MCF-7 cell lines by the MTT assay. The triazole glycosides 16 and 18 provided significant cytotoxic activities against HCT-116 cell lines comparable to that of doxorubicin and other studied compounds. The cytotoxic behaviour against MCF-7 exhibited that all the investigated compounds were more potent than doxorubicin. Moreover, all screened targets were evaluated against mutant EGFR kinase type L858R and the results revealed that the acetylated 1,2,3-triazole glycosides 13-18 exhibited excellent EGFR inhibitory activity in comparison with gefitinib. Furthermore, molecular modelling studies were performed to investigate the binding affinity of the most active compounds to EGFR enzyme.
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Affiliation(s)
- Reham R. Khattab
- Photochemistry Department (Synthetic Unit), National Research Centre, Cairo, Egypt
| | - Asma K. Alshamari
- Chemistry Department, College of Science, Ha'il University, Ha'il, KSA
| | - Allam A. Hassan
- Chemistry Department, Faculty of Science, Suez University, Suez, Egypt
- Department of Chemistry, College of Science, Shaqra University, Shaqra, KSA
| | | | - Wael A. El-Sayed
- Photochemistry Department (Synthetic Unit), National Research Centre, Cairo, Egypt
- Department of Chemistry, College of Science, Qassim University, Buraydah, KSA
| | - Hanem M. Awad
- Tanning Materials and Leather Technology Department, National Research Centre, Cairo, Egypt
| | - Eman S. Nossier
- Pharmaceutical Medicinal Chemistry, Faculty of Pharmacy (Girls), Al-Azhar University, Cairo, Egypt
| | - Nasser A. Hassan
- Photochemistry Department (Synthetic Unit), National Research Centre, Cairo, Egypt
- Pharmaceutical Chemistry Department, College of Pharmacy, Shaqra University, Shaqra, KSA
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3
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Khalaf HS, Tolan HEM, El-Bayaa MN, Radwan MAA, El-Manawaty M, El-Sayed WA. Synthesis and Anticancer Activity of New Pyridine-Thiophene and
Pyridine-Furan Hybrid Compounds, Their Sugar Hydrazone, and Glycosyl
Derivatives. RUSS J GEN CHEM+ 2020. [DOI: 10.1134/s1070363220090182] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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4
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Basiony EA, Hassan AA, Al-Amshany ZM, Abd-Rabou AA, Abdel-Rahman AAH, Hassan NA, El-Sayed WA. Synthesis and Cytotoxic Activity of New Thiazolopyrimidine Sugar Hydrazones and Their Derived Acyclic Nucleoside Analogues. Molecules 2020; 25:E399. [PMID: 31963649 PMCID: PMC7024276 DOI: 10.3390/molecules25020399] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2019] [Revised: 01/15/2020] [Accepted: 01/16/2020] [Indexed: 01/01/2023] Open
Abstract
New thienyl- or chlorophenyl-substituted thiazolopyrimidine derivatives and their derived sugar hydrazones incorporating acyclic d-galactosyl or d-xylosyl sugar moieties in addition to their per-O-acetylated derivatives were synthesized. Heterocyclization of the formed sugar hydrazones afforded the derived acyclic nucleoside analogues possessing the 1,3,4-oxadiazoline as modified nucleobase via acetylation followed by the cyclization process. The cytotoxic activity of the synthesized compounds was studied against human breast cancer MCF7 and MDA-MB-231 cell lines as well as human colorectal cancer HCT 116 and Caco-2 cell lines. High activities were revealed by compounds 1, 8, 10, 11, and 13 against Caco-2 and MCF7 cells in addition to moderate activities exhibited by other compounds against HCT116 or MDA-MB-231 cells.
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Affiliation(s)
- Ebtesam A. Basiony
- Faculty of Science, Chemistry Department, Menoufia University, Shibin EL-Kom 32511, Egypt; (E.A.B.); (A.A.-H.A.-R.)
| | - Allam A. Hassan
- Faculty of Science, Chemistry Department, Suez University, Suez 43511, Egypt;
- Applied Medical Science, Medical Laboratories Department, Shaqra University, Shaqra 11961, Saudi Arabia
| | - Zahra M. Al-Amshany
- Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah 21551, Saudi Arabia;
| | - Ahmed A. Abd-Rabou
- Hormones Department, Medical Research Division, National Research Centre, Giza 12511, Egypt;
- Stem Cells Lab, Center of Excellence for Advanced Sciences, National Research Centre, Giza 12511, Egypt
| | - Adel A.-H. Abdel-Rahman
- Faculty of Science, Chemistry Department, Menoufia University, Shibin EL-Kom 32511, Egypt; (E.A.B.); (A.A.-H.A.-R.)
| | - Nasser A. Hassan
- Pharmaceutical Science Department, College of Pharmacy, Shaqra University, Shaqra 11961, Saudi Arabia
- Photochemistry Department, National Research Centre, Giza 12511, Egypt
| | - Wael A. El-Sayed
- Photochemistry Department, National Research Centre, Giza 12511, Egypt
- Department of Chemistry, College of Science, Qassim University, Buraidah 51452, Saudi Arabia
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5
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Aouad MR, Al-Mohammadi HM, Al-blewi FF, Ihmaid S, Elbadawy HM, Althagfan SS, Rezki N. Introducing of acyclonucleoside analogues tethered 1,2,4-triazole as anticancer agents with dual epidermal growth factor receptor kinase and microtubule inhibitors. Bioorg Chem 2020; 94:103446. [DOI: 10.1016/j.bioorg.2019.103446] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 11/03/2019] [Accepted: 11/13/2019] [Indexed: 01/17/2023]
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6
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Tolan HEM, El-Sayed WA, Tawfek N, Abdel-Megeid FME, Kutkat OM. Synthesis and anti-H5N1 virus activity of triazole- and oxadiazole-pyrimidine hybrids and their nucleoside analogs. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2019; 39:649-670. [PMID: 31599202 DOI: 10.1080/15257770.2019.1674331] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
New 1,2,3-triazole glycosides and 1,2,4-thioglycosides incorporating a substituted pyrimidinedione ring system were synthesized via click dipolar cycloaddition and heterocyclization of hydrazine-1-carbodithioate derivatives, respectively. The sugar hydrazine derivatives linked aminodimethyluracil were also prepared. In addition, the oxadiazoline substituted with acyclic sugar moieties linked to the pyrimidinedione as acyclic nucleoside analogs were synthesized. The antiviral activity of the synthesized compounds against avian influenza H5N1 virus was investigated and compounds 18, 13 and 19 showed good activities against the virus strains.
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Affiliation(s)
- Hala E M Tolan
- Photochemistry Department, National Research Centre, Dokki, Giza, Egypt
| | - Wael A El-Sayed
- Photochemistry Department, National Research Centre, Dokki, Giza, Egypt.,Chemistry Department, Faculty of Science, Qassim University, Kingdom of Saudi Arabia
| | - Nashwa Tawfek
- Photochemistry Department, National Research Centre, Dokki, Giza, Egypt
| | | | - Omnya M Kutkat
- Environmental Research Division, National Research Center, Dokki, Cairo, Egypt
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7
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Kassem AF, Nassar IF, Abdel-Aal MT, Awad HM, El-Sayed WA. Synthesis and Anticancer Activity of New ((Furan-2-yl)-1,3,4-thiadiazolyl)-1,3,4-oxadiazole Acyclic Sugar Derivatives. Chem Pharm Bull (Tokyo) 2019; 67:888-895. [PMID: 31366838 DOI: 10.1248/cpb.c19-00280] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
New sugar hydrazones incorporating furan and/or 1,3,4-thiadiazole ring systems were synthesized by reaction of the corresponding hydrazide with different aldose sugars. Heterocyclization of the formed hydrazones afforded the derived acyclic nucleoside analogues possessing the 1,3,4-oxadiazoline as modified nucleobase via acetylation followed by the heterocyclization process. The anticancer activity of the synthesized compounds was studied against human liver carcinoma cell (HepG-2) and at human normal retina pigmented epithelium cells (RPE-1). High activities were revealed by compounds 3, 12 and 14 with IC50 values near to that of the reference drug doxorubicin.
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Affiliation(s)
- Asmaa F Kassem
- Chemistry of Natural and Microbial Products Department, National Research Centre
| | | | | | - Hanem M Awad
- Tanning Materials and Leather Technology Department, National Research Centre
| | - Wael A El-Sayed
- Chemistry Department, Faculty of Science, Qassim University.,Photochemistry Department, National Research Centre
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8
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Ashry ESHE, Rashed N, Awad LF, Abdel-Rahman AA, Rasheed HA. Synthesis of New 7-Alkylated Theophyllines by Chemical Modification of Dyphylline. JOURNAL OF CHEMICAL RESEARCH 2019. [DOI: 10.3184/030823401103169405] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Chemical modification of the propyl side chain of 7-(2,3-dihydroxyprop-1-yl)theophylline led to a variety of hetero-cyclic compounds linked to the theophylline by a methylene group.
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Affiliation(s)
- El Sayed H. El Ashry
- Chemistry Department, Faculty of Science, Alexandria University, Alexandria, Egypt
| | - Nagwa Rashed
- Chemistry Department, Faculty of Science, Alexandria University, Alexandria, Egypt
| | - Laila F. Awad
- Chemistry Department, Faculty of Science, Alexandria University, Alexandria, Egypt
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9
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Shurrab NK, Alhendawi H, Kerrit MA. Synthesis of New 3,7,9-Trisubstituted Pyrazolo[4,3-e][1,2,4]Triazolo[4,3-c] Pyrimidines Acyclo C-Nucleosides via Oxidative Cyclisation. JOURNAL OF CHEMICAL RESEARCH 2018. [DOI: 10.3184/174751918x15414291150879] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Condensation of 4-hydrazino-1,3-diphenylpyrazolo[3,4-d]-pyrimidine with the aldohexoses, namely, D-glucose, D-galactose, D-mannose and the aldopentoses, D-arabinose, D-xylose and D-ribose, by heating in an aqueous ethanol in the presence of a catalytic amount of HCl, gave the respective aldehydo-sugar hydrazones. Oxidative cyclisation of such hydrazones by stirring with iron(III) chloride in ethanol at room temperature afforded the expected acyclo C-nucleosides 3-substituted-7,9-diphenylpyrazolo[4,3-e][1,2,4]triazolo[4,3-c]-pyrimidines. The structures of the cyclised sugar hydrazones were confirmed by their elemental analyses and spectral data.
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Affiliation(s)
- Nabil Kh. Shurrab
- Department of Chemistry, Faculty of Science, Al-Azhar University of Gaza, PO Box 1277, Gaza, Palestine
| | - Hussein Alhendawi
- Department of Chemistry, Faculty of Science, Al-Azhar University of Gaza, PO Box 1277, Gaza, Palestine
| | - Manar A. Kerrit
- Department of Chemistry, Faculty of Science, Al-Azhar University of Gaza, PO Box 1277, Gaza, Palestine
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10
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Saftić D, Žinić B, Glavaš-Obrovac L, Studzińska M, Paradowska E, Leśnikowski ZJ. Synthesis and in vitro evaluation of antiviral and cytostatic properties of novel 8-triazolyl acyclovir derivatives. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2018; 37:397-414. [PMID: 30449256 DOI: 10.1080/15257770.2018.1485932] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
As a part of the research aimed on identification of new nucleobase derivatives with improved biological properties, a series of novel 8-substituted acyclovir derivatives were synthesized. The 8-azidoguanosine 4 and novel 8-azidoacyclovir 9 were synthesized from commercially available guanosine 1 and acyclovir 6 which were transformed into 8-bromopurine derivatives 2 and 7 and hydrazine derivatives 3 and 8, respectively. 8-Triazolylguanosine 5 and 8-triazolylacyclovir analogs 10-12 were successfully synthesized via the Cu(I) catalyzed 1,3-dipolar cycloaddition reaction of azides 4 and 9 with propargyl alcohol, 4-pentyn-1-ol and 5-hexyn-1-ol. The novel 1,4-disubstituted 1,2,3-triazolyl compounds 5, 10-12 were evaluated for antiviral activity against selected DNA and RNA viruses and cytostatic activity against normal Madine Darby canine kidney (MDCK I) cells, and seven tumor cell lines (HeLa, CaCo-2, NCI-H358, Jurkat, K562, Raji and HuT78). While tested compounds exerted no antiviral activity at nontoxic concentrations, the 8-triazolyl acyclovir derivative 10, with the shortest alkyl substituent at the C-4 of triazole ring, was found to be the most active against the CaCo-2 cell line.
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Affiliation(s)
- Dijana Saftić
- a Division of Organic Chemistry and Biochemistry , Ruđer Bošković Institute , Zagreb , Croatia
| | - Biserka Žinić
- a Division of Organic Chemistry and Biochemistry , Ruđer Bošković Institute , Zagreb , Croatia
| | - Ljubica Glavaš-Obrovac
- b Department of Chemistry, Biochemistry and Clinical Chemistry, Faculty of Medicine , Osijek , Croatia
| | - Mirosława Studzińska
- c Laboratory of Molecular Virology and Biological Chemistry , Institute of Medical Biology of the Polish Academy of Sciences , Łódź , Poland
| | - Edyta Paradowska
- c Laboratory of Molecular Virology and Biological Chemistry , Institute of Medical Biology of the Polish Academy of Sciences , Łódź , Poland
| | - Zbigniew J Leśnikowski
- c Laboratory of Molecular Virology and Biological Chemistry , Institute of Medical Biology of the Polish Academy of Sciences , Łódź , Poland
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11
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A convenient new synthesis, characterization and antibacterial activity of double headed acyclo-C-nucleosides from unprotected d-glucose. ARAB J CHEM 2016. [DOI: 10.1016/j.arabjc.2012.05.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
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12
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Moustafa OS, El-Ossaily YA. Synthesis and Antimicrobial Activity of Novel Furothienoquinoxalines, Pyranothienoquinoxalines and Pyrimidopyranothienoquinoxalines. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.200200018] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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13
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Aouad MR, Rezki N, Messali M, El Ashry ESH. Synthesis of bis-acyclonucleoside analogues bearing benzothienyl-1,2,4-Triazol-3-Yl-disulfide under conventional and microwave methods. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2013; 32:28-41. [PMID: 23360293 DOI: 10.1080/15257770.2012.751491] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The oxidation of 5-(3-chlorobenzo[b]thien-2-yl)-4H-1,2,4-triazole-3-thiol (1) with a solution of iodine and potassium iodide at room temperature afforded [5-(3-chlorobenzo[b]thien-2-yl)-4H-1,2,4-triazole-3-yl]disulfide (2). In contrast, when the reaction mixture was heated or irradiated by MW, an unexpected additional product was obtained and identified as 3-(3-chlorobenzo[b]thien-2-yl)-4H-1,2,4-triazole (3); the ratio of products was 3:1. The preferred conformer of 2 was deduced from the theoretical calculation. The alkylation of compounds 2 and 3 with epichlorohydrin and hydroxyalkylating agents gave the corresponding N,N-bis- and N-acyclonucleosides analogues 8-15.
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Affiliation(s)
- Mohamed R Aouad
- Department of Chemistry, Taibah University, Madinah, Saudi Arabia.
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14
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Abdel-Rahman AAH, Ali OM, Abdel-Megeed AAS. Synthesis and Antimicrobial Activity of New Tetrazoles Incorporating Isoindole-1,3-dione Moiety and Their Sugar Derivatives. J Heterocycl Chem 2013. [DOI: 10.1002/jhet.1119] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | - Omar M. Ali
- Department of Chemistry, Faculty of Science; Menoufia University; Shebin El-Koam; Egypt
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15
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Krim J, Taourirte M, Engels JW. Synthesis of 1,4-disubstituted mono and bis-triazolocarbo-acyclonucleoside analogues of 9-(4-hydroxybutyl)guanine by Cu(I)-catalyzed click azide-alkyne cycloaddition. Molecules 2011; 17:179-90. [PMID: 22202806 PMCID: PMC6269037 DOI: 10.3390/molecules17010179] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2011] [Revised: 12/09/2011] [Accepted: 12/19/2011] [Indexed: 11/17/2022] Open
Abstract
A series of novel mono-1,2,3-triazole and bis-1,2,3-triazole acyclonucleoside analogues of 9-(4-hydroxybutyl)guanine was prepared via copper(I)-catalyzed 1,3-dipolar cycloaddition of N-9 propargylpurine, N-1-propargylpyrimidines/as-triazine with the azido-pseudo-sugar 4-azidobutylacetate under solvent-free microwave conditions, followed by treatment with K(2)CO(3)/MeOH, or NH(3)/MeOH. All compounds studied in this work were screened for their antiviral activities [against human rhinovirus (HRV) and hepatitis C virus (HCV)] and antibacterial activities against a series of Gram positive and negative bacteria.
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Affiliation(s)
- Jamal Krim
- Laboratoire de Chimie Bioorganique et Macromoléculaire, Faculté des Sciences et Techniques - Guéliz, 40000, Marrakech, Maroc
- Institut für Organische Chemie und Chemische Biologie, J.W. Goethe Universität, Max-von-Laue Str. 7, 60438 Frankfurt am Main, Germany
| | - Moha Taourirte
- Laboratoire de Chimie Bioorganique et Macromoléculaire, Faculté des Sciences et Techniques - Guéliz, 40000, Marrakech, Maroc
| | - Joachim W. Engels
- Institut für Organische Chemie und Chemische Biologie, J.W. Goethe Universität, Max-von-Laue Str. 7, 60438 Frankfurt am Main, Germany
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16
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El-Sayed WA, Ali OM, Hendy HA, Abdel-Rahman AAH. Synthesis and Antimicrobial Activity of New 2,5-Disubstituted 1,3,4-Oxadiazoles and 1,2,4-Triazoles and Their Sugar Derivatives. CHINESE J CHEM 2011. [DOI: 10.1002/cjoc.201100029] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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17
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Moustafa AH, El-Sayed HA, Haikal AEFZ, El Ashry ESH. Synthesis of acyclovir and HBG analogues having nicotinonitrile and its 2-methyloxy 1,2,3-triazole. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2011; 30:340-52. [PMID: 21774629 DOI: 10.1080/15257770.2011.582850] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Reaction of pyridin-2(1H)-one 1 with 4-bromobutylacetate (2), (2-acetoxyethoxy)methyl bromide (3) gave the corresponding nicotinonitrile O-acyclonucleosides, 4 and 5, respectively. Deacetylation of 4 and 5 gave the corresponding deprotected acyclonucleosides 6 and 7, respectively. Treatment of pyridin-2(1H)-one 1 with 1,3-dichloropropan-2-ol (8), epichlorohydrin (10) and allyl bromide (12) gave the corresponding nicotinonitrile O-acyclonucleosides 9, 11, and 13, respectively. Furthermore, reaction of pyridin-2(1H)-one 1 with the propargyl bromide (14) gave the corresponding 2-O-propargyl derivative 15, which was reacted via [3+2] cycloaddition with 4-azidobutyl acetate (16) and [(2-acetoxyethoxy)methyl]azide (17) to give the corresponding 1,2,3-triazole derivatives 18 and 19, respectively. The structures of the new synthesized compounds were characterized by using IR, (1)H, (13)C NMR spectra, and microanalysis. Selected members of these compounds were screened for antibacterial activity.
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Affiliation(s)
- Ahmed H Moustafa
- Department of Chemistry, Faculty of Science, Zagazig University, Zagazig, Egypt.
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18
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Fadda AA, Abdel-Rahman AAH, El-Sayed WA, Zidan TA, Badria FA. Synthesis of novel 1,3,4-oxadiazole derivatives and their nucleoside analogs with antioxidant and antitumor activities. Chem Heterocycl Compd (N Y) 2011. [DOI: 10.1007/s10593-011-0847-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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19
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El-Sayed WA, Abbas HAS, Mohamed AM, Abdel-Rahman AAH. Synthesis and antimicrobial activity of new C-furyl glycosides bearing substituted 1,3,4-oxadiazoles. J Heterocycl Chem 2011. [DOI: 10.1002/jhet.679] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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20
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Rashad AE, Shamroukh AH, Sayed HH, Awad SM, Abdelwahed NAM. Some Novel Thiopyrimidine Nucleoside Analogs: Synthesis and In Vitro Antimicrobial Evaluation. SYNTHETIC COMMUN 2011. [DOI: 10.1080/00397911003632881] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Aymn E. Rashad
- a Photochemistry Department , National Research Center , Cairo , Egypt
| | | | - Hayam H. Sayed
- b Organic Chemistry Department , Faculty of Pharmacy, Helwan University , Cairo , Egypt
| | - Samir M. Awad
- b Organic Chemistry Department , Faculty of Pharmacy, Helwan University , Cairo , Egypt
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21
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Synthesis and antimicrobial activity of novel 5-amino-4-cyano-1H-pyrazole and quinazolin-4(3H)-one derivatives. Arch Pharm Res 2010; 33:1891-900. [DOI: 10.1007/s12272-010-1202-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2010] [Revised: 05/17/2010] [Accepted: 05/23/2010] [Indexed: 10/18/2022]
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22
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Synthesis and antiviral evaluation of new 2,5-disubstituted 1,3,4-oxadiazole derivatives and their acyclic nucleoside analogues. MONATSHEFTE FUR CHEMIE 2010. [DOI: 10.1007/s00706-010-0360-y] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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23
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El-Sayed WA, Rashad AE, Awad SM, Ali MM. Synthesis and in vitro antitumor activity of new substituted thiopyrimidine acyclic nucleosides and their thioglycoside analogs. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2010; 28:261-74. [PMID: 20183580 DOI: 10.1080/15257770902946165] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Some new thiopyrimidine acyclic nucleosides and thioglycoside derivatives 3a-c, 4a-c, 6a,b, and 7a,b were synthesized. The cytotoxicity and antitumor evaluation of all prepared compounds have been tested in vitro against Ehrlich's ascites carcinoma cell line and their activity against glutathione peroxidase and catalase were reported. The role of the prepared compounds as free radical regulators and the therapeutic antitumor effect of a balanced generation of free radicals are discussed. Compounds 2, 3b, 3c, 4a, and 4c inhibited significantly in a dose dependent manner the growth of Ehrlich ascites carcinoma cells while the other compounds did not show any antitumor activity even at higher concentrations.
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Affiliation(s)
- Wael A El-Sayed
- Photochemistry Department, National Research Center, El Dokki, Cairo, Egypt.
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24
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Abdel-Rahman AAH, El-Etrawy AAS, Abdel-Megied AES, Zeid IF, El Ashry ESH. Synthesis and antiviral evaluation of novel 2,3-dihydroxypropyl nucleosides from 2- and 4-thiouracils. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2009; 27:1257-71. [PMID: 19003571 DOI: 10.1080/15257770802086898] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Regioselective alkylation of 2-thiouracils 1a-c and 4-thiouracils 7a,b with 2,3-O-isopropylidene-2,3-dihydroxypropyl chloride (2) afforded 2-[[(2,2-Dimethyl-1,3-dioxolan-4-yl) methyl]thio]pyrimidin-4(1H)-ones 3a-c and 4-[[(2,2-Dimethyl-1,3-dioxolan-4-yl)methyl]thio] pyrimidin-2(1H)-ones 8a,b, respectively. Further alkylation with 2 and/or 2,3-O-isopropylidine-1-O-(4-toluenesulfonyl)-glycerol (4) gave the acyclo N-nucleosides 5a-c and 9a,b whose deprotection afforded 6a-c and 10a,b. 2-(Methylthio)pyrimidin-4(1H)-ones 11a-c and 4-(methylthio)pyrimidin-2(1H)-ones 14a,b were treated with 2 and/or 4 to give 12a-c and 15a,b which were deprotected to give 13a-c and 16a,b. Pyrimidine-2,4(1H,3H)-dithiones 17a-c were treated with two equivalents of 2 to give 2,4-bis[[(2,2-dimethyl-1,3-dioxolan-4-yl)methyl]thio] pyrimidines 18a-c. Deprotection of compounds 18a-c gave 2,4-bis[(2,3-dihydroxypropyl)thio]pyrimidines 19a-c. The activity of the deprotected nucleosides against Hepatitis B virus was evaluated and showed moderate inhibition activity against HBV with mild cytotoxicity.
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Affiliation(s)
- Adel A-H Abdel-Rahman
- Chemistry Department, Faculty of Science, Menoufia University, Shebin El-Koam, Egypt
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El Ashry ESH, Awad LF, Rashed N, Abdelrahman A, Rasheed HA. Synthesis and activity against HBV of novel Tetra-seconucleoside analogues of dyphlline having the acyclic chains of ACV and HBG. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2008; 27:309-17. [PMID: 18260013 DOI: 10.1080/15257770701845329] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Selective alkylation of dyphylline (1) with (2-acetoxyethoxy)methyl bromide (2a) or 4-acetoxybutyl bromide (2b) afforded 3'-O-[(acetoxyethoxy)methyl]dyphylline (3a) and 3'-O-(4-acetoxybutyl)-dyphylline (3b), respectively. A trans esterification process rather than alkylation of the dihydroxy-propyl side chain in 1 had taken place during the reaction with 2-p-toluoyloxy)ethyl chloride (5) to afford the respective 3'-toluoyloxy derivative 7 and not the anticipated 3'-O-[(p-toluoyloxy)ethyl]-dyphylline (6). Deacylation of 3a,b and 7 afforded 4a,b and 1, respectively. Viral screening of selected compounds against HBV has been investigated.
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Affiliation(s)
- El Sayed H El Ashry
- Department of Chemistry, Faculty of Science, Alexandria University, Alexandria, Egypt.
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26
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Abdel-Aal MT, El-Sayed WA, El-Kosy SM, El-Ashry ESH. Synthesis and Antiviral Evaluation of Novel 5-(N-Aryl-aminomethyl-1,3,4-oxadiazol-2-yl)hydrazines and Their Sugars, 1,2,4-Triazoles, Tetrazoles and Pyrazolyl Derivatives. Arch Pharm (Weinheim) 2008; 341:307-13. [DOI: 10.1002/ardp.200700154] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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27
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Ali IAI, Al-Masoudi IA, Aziz NM, Al-Masoudi NA. New acyclic quinoxaline nucleosides. Synthesis and anti-hiv activity. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2008; 27:146-56. [PMID: 18205069 DOI: 10.1080/15257770701795920] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
A series of acyclonucleosides substituted 1-(4,5-dihydroxypentyl) (13-8) and 2-(4,5-dihydroxypentyloxy)quinoxalines (19-24) were synthesized by the sharpless asymmetric dihydroxylation of the derivatives 1-6 and 7-12, respectively. Treatment of the quinoxaline base 26 with (R)-2,2-dimethyl-1,3-dioxolan-4-ylmethyl-p-toluenesulfonate (27) in the presence of NaH/DMF furnished 28. Acid hydrolysis of 28 gave 1-(2,3-dihydroxypropyl)-6,7-dimethyl-quinoxaline-2-one (29). Alternatively, 29 was prepared by sharpless dihydroxylation of 30. All the compounds were evaluated for their in vitro anti-HIV-1 and HIV-2 in MT-4 cell and found inactive, except 29, which showed inhibition of HIV-1 with EC50 value of 0.15 +/- 0.1 microg/ml and a therapeutic index (SI) of 73.
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Affiliation(s)
- Ibrahim A I Ali
- Department of Chemistry, Faculty of Science, Suez Canal University, Ismailia, Egypt
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28
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El Ashry ESH, Abdel-Rahman A, Rashed N, Awad LF, Rasheed HA. Synthesis of AZT analogues: 7-(3-azido-2-hydroxypropyl)-, 7-(3-amino-2-hydroxypropyl)-,7-(3-triazolyl-2-hydroxypropyl)theophylline. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2008; 25:299-305. [PMID: 16629122 DOI: 10.1080/15257770500544495] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Nucleophilic displacement of the tosyloxy group in 7-(2-hydroxy-3-p-toluenesulfonyloxypropyl)theophylline (1) with azide anion afforded 7-(3-azido-2-hydroxypropyl)theophylline (2). Reduction of the 3-azido group in 2 with Ph3P/Py/NH4OH afforded the 3-amino derivative 4, alternatively obtained by regioselective amination of 7-(2,3-epoxypropyl)theophylline (3). Selective acetylation of 4 gave the N-acetyl derivative 5. 1,3-Dipolar cycloaddition of the azide group in 2 with N1-propargyl thymine (6) afforded the regioisomeric triazole 7.
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Affiliation(s)
- El Sayed H El Ashry
- Department of Chemistry, Faculty of Science, Alexandria University, Alexandria, Egypt.
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29
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Ashry ESHE, Awad LF, Abdel Hamid H, Atta AI. MAOS ofD‐Gluconic Acid,D‐Glucono‐1,4‐ and 1,5‐Lactones, Esters, Hydrazides, and Benzimidazoles Thereof. J Carbohydr Chem 2007. [DOI: 10.1080/07328300701540258] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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30
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Hassan NA. Syntheses of acyclic C-glycosidic derivatives of 1,2,4-triazoles by cycloadditions of 1-aza-2-azoniaallene salts to D-glucononitrile-2,3,4,5,6-pentaacetate. J Heterocycl Chem 2007. [DOI: 10.1002/jhet.5570440432] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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31
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Koszytkowska-Stawińska M, Kaleta K, Sas W, De Clercq E. Synthesis and antiviral properties of aza-analogues of acyclovir. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2007; 26:51-64. [PMID: 17162587 DOI: 10.1080/15257770601052281] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Aza-analogues of Acyclovir were obtained from N-(2-pivaloyloxyethyl)-N-(pivaloyloxymethyl)-p-toluenesulfonamide via a one-pot base silylation/nucleoside coupling procedure. The antiviral activities of all aza-nucleosides in vitro against a variety of viruses were evaluated. None of these compounds displayed any specific antiviral effects.
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32
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Rashad AE, Mohamed MS, Zaki MEA, Fatahala SS. Synthesis and Biological Evaluation of Some Pyrrolo[2,3-d]pyrimidines. Arch Pharm (Weinheim) 2006; 339:664-9. [PMID: 17149793 DOI: 10.1002/ardp.200600055] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Pyrrolo[2,3-d]pyrimidine and tetrazolopyrimidine derivatives 2a, b-5a, b were prepared. Also, acyclic and cyclic C-nucleosides 7a, b-12a, b were prepared by treating compound 6 with some aldoses. All prepared products were tested for antiviral activity against hepatitis-A virus (HAV, MBB-cell culture adapted strain) and herpes simplex virus type-1 (HSV-1). Plaque reduction infectivity assay was used to determine virus count reduction as a result of treatment with tested compounds. Compound 2a showed the highest effect on HAV, while compound 11b showed the highest effect on the HSV-1 virus.
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Affiliation(s)
- Aymn E Rashad
- Photochemistry Department, National Research Centre, Dokki, Ciro 1258943, Cairo, Egypt.
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33
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Ashry ESHE, Rashed N, Abdel-Rahman A, Awad LF, Rasheed HA. Synthesis of 2-bromomethyl-3-hydroxy-2-hydroxymethyl-propyl pyrimidine and theophylline nucleosides under microwave irradiation. Evaluation of their activity against hepatitis B virus. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2006; 25:925-39. [PMID: 16901823 DOI: 10.1080/15257770600793919] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Alkylation of 2-methylthiopyrimidin-4(1H)-one (1a) and its 5(6)-alkyl derivatives 1b-d as well as theophylline (7) with 2,2-bis(bromomethyl)-1,3-diacetoxypropane (2) under microwave irradiation gave the corresponding acyclonucleosides 1-[(3-acetoxy-2-acetoxymethyl-2-bromomethyl)prop-1-yl]-2-methyl-thio pyrmidin-4(1H)-ones 3a-d and 7-[(3-acetoxy-2-acetoxymethyl-2-bromomethyl)prop-1-yl]theophylline (8), which upon further irradiation gave the double-headed acyclonucleosides 1,1 '-[(2,2-diacetoxymethyl)-1,3-propylidene]-bis[(2-(methylthio)-pyrimidin-4(1H)-ones] 4a-c, and 7,7 '-[(2,2-diacetoxymethyl)-1,3-propylidene]-bis(theophylline) (9). The deacetylated derivatives were obtained by the action of sodium methoxide. The activity of deacetylated nucleosides against Hepatitis B virus was evaluated. Compound 5b showed moderate inhibition activity against HBV with mild cytotoxicity.
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Affiliation(s)
- E S H El Ashry
- Department of Chemistry, Faculty of Science, Alexandria University, Alexandria, Egypt.
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34
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35
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Khattab AF, Zahran MA, Saif A. Simple Analogues of Acyclonucleosides: Synthesis of N‐Substituted Pyrido[3′,2′:4,5]thieno[3,2‐ d]pyrimidine Derivatives. SYNTHETIC COMMUN 2006. [DOI: 10.1080/00397910600767181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Ahmed F. Khattab
- a Chemistry Department, Faculty of Science , Monoufiya University , Shebien El‐Koam, Egypt
| | - Magdy A. Zahran
- a Chemistry Department, Faculty of Science , Monoufiya University , Shebien El‐Koam, Egypt
| | - Ahmed Saif
- b Sugar and Integrated Industries Company , El‐Hawamdiya, Egypt
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36
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Yu J, Zhang S, Li Z, Lu W, Zhang L, Zhou R, Liu Y, Cai M. SYNTHESIS, X-RAY DIFFRACTION, AND NMR ANALYSIS OF (2S, 3a′R, 6′S, 7a′R)-3-ACETYL-2′, 2′, 2″, 2″-TETRAMETHYL-5-PHENYL-2, 3-DIHYDRO-1, 3, 4-OXADIAZOLE-2-SPIRO-7′-{1′, 3′-DIOXOLANO [4, 5-c] PYRANO}-6′-SPIRO-4″-(1″, 3″-DIOXOLANE). J Carbohydr Chem 2006. [DOI: 10.1081/car-100108664] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Jianxin Yu
- a National Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Beijing Medical University , Beijing, 100083, China
- b Department of Chemistry , Xinjiang University , Wulumqi, 830046, China
| | - Suna Zhang
- b Department of Chemistry , Xinjiang University , Wulumqi, 830046, China
| | - Zhongjun Li
- a National Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Beijing Medical University , Beijing, 100083, China
| | - Wenjie Lu
- c Department of Chemistry , Wuyi University , Jiangmen, 529020, China
| | - Lijing Zhang
- b Department of Chemistry , Xinjiang University , Wulumqi, 830046, China
| | - Rong Zhou
- b Department of Chemistry , Xinjiang University , Wulumqi, 830046, China
| | - Yuting Liu
- b Department of Chemistry , Xinjiang University , Wulumqi, 830046, China
| | - Mengshen Cai
- a National Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Beijing Medical University , Beijing, 100083, China
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37
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Nasr AZ, Mostafa MA. Utilization of Dipotassium Salt of Galactaric Acid Bis(Hydrazidocarbodithioic Acid) As a Synthone for Double-Headed 1,3,4-Thiadiazoline, 1,3,4-Oxadiazoline and 1,2,4-Triazoline Acyclo C-Nucleosides. PHOSPHORUS SULFUR 2006. [DOI: 10.1080/104265090888397] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- A. Z. Nasr
- a Chemistry Department, Faculty of Science, Cairo University , Faiyoum, Egypt
| | - M. A. Mostafa
- b Chemistry Department, Faculty of Science, Alexandria University , Alexandria, Egypt
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38
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Moustafa AH, Haggam RA, Younes ME, El Ashry ESH. Double-headed acyclo C-nucleoside analogues. Functionalized 1,2-bis-(1,2,4-triazol-3-yl)ethane-1,2-diol. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2006; 24:1885-94. [PMID: 16438055 DOI: 10.1080/15257770500268962] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Reaction of L-tartaric acid with thiocarbohydcrazide afforded (1R, 2S)-1,2-bis(4-amino-5-mercapto-1,2,4-triazol-3-yl)-ethane-1,2-diol (3). The functional groups in 3 allowed the construction of fused heterocycles on the 1,2,4-triazole rings, mainly of the 1,2,4-triazolo[3,4-b][1,3,4]thiadiazine type as in 4, 5, 7, 10, 13 and 1,2,4-triazolo[3,4-b][1,3,4]thiadiazole type as in 14.
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Affiliation(s)
- A H Moustafa
- Chemistry Department, faculty of Science, Zagazig University, Zagazig
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39
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el-Essawy FA. Synthesis of novel acyclonucleosides analogs of pyridothienopyrimidine as antiviral agents. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2005; 24:1265-76. [PMID: 16270667 DOI: 10.1081/ncn-200067425] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Nucleoside analogs of pyridothienopyramidines were prepared by condensing the sodium salt 2a,b with an acyclic side chain in the form of acetylated haloalkoxyalcohol, and subsequent removal of the protecting acetyl group in ammonia/methanol afforded 4a,b. The O-tosyl derivative of 4a could then be modified to azido- and amino derivatives. Reaction of the sodium salt of 2b with halo-ether, benzyl halo-ether and/or halo-thioether gave N- and S-alkylated products, 8 and 9, respectively. Coupling of 10 with the sodium salt of 2a,b gave the corresponding dioxolane derivatives 11, 13, and 14, which were treated with 80% acetic acid at room temperature to give diols 12, 15, and 16. Treatment of 16 with tosyl chloride afforded the ditosylate 17 and this could then be modified to diazido and diamino derivatives. Some of the products were screened for their biological activity.
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Affiliation(s)
- Farag A el-Essawy
- Chemistry Department, Faculty of Science, Monoufiya University, Shebein El-Koam, Egypt
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40
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Nasr AZ. First synthesis of double headed 1,3,4-oxadiazino[6,5-b]indole acyclo C-nucleosides. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2005; 23:1825-32. [PMID: 15628742 DOI: 10.1081/ncn-200040617] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Condensation of 1,3-dihydro-2,3-dioxo-2H-indoles (la-c) with galactaric acid bis hydrazide (2) gave the corresponding galactaric acid bis[2-(1,2-dihydro-2-oxo-3H-indol-3-ylidene)hydrazides] (3a-c). Acetylation of the latter compounds with acetic anhydride in the presence of pyridine at ambient temperature gave the 2,3,4,5-tetra-O-acetylgalactaric acid bis[2-(1,2-dihydro-2-oxo-1-substituted-3H-indol-3-ylidene)hydrazides] (4b-d). Heterocyclization of the tetra-O-acetates 4b-d by heating with thionyl chloride afforded the double headed acyclo C-nucleosides: 1,2,3,4-tetra-O-acetyl- 1,4-bis[9-substituted-1,3,4-oxadiazino[6,5-b]indol-2-yl-1-ium]-galacto-tetritol dichlorides (5b-d). Structures of the prepared compounds were elucidated from their spectral properties.
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Affiliation(s)
- Adel Z Nasr
- Department of Chemistry, Faculty of Science, Cairo University, Faiyoum, Egypt.
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41
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Yu J, Zhang S, Li Z, Lu W, Cai M. Stereoselective synthesis, structural characterization, and properties of 1,2-O-isopropylidene-3-C-(5-phenyl-1,2,4-oxadiazol-3-yl)-β-d-psicopyranose. Bioorg Med Chem 2005; 13:353-61. [PMID: 15598558 DOI: 10.1016/j.bmc.2004.10.023] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2003] [Revised: 10/07/2004] [Accepted: 10/09/2004] [Indexed: 11/19/2022]
Abstract
1,2:4,5-Di-O-isopropylidene-3-C-(5-phenyl-1,2,4-oxadiazol-3-yl)-beta-D-psicopyranose 14 was synthesized stereoselectively from 1,2:4,5-di-O-isopropylidene-3-C-amidoximino-3-O-benzoyl-beta-D-psicopyranose 8 using a novel procedure. Treatment of 8 with acetic anhydride, chloroacetyl chloride, propanic anhydride, or benzoyl chloride causes the 3-O-benzoyl group to undergo an intramolecular replacement reaction with neighboring group participation and transfer resulting in a more stable conjugation system of the 1,2,4-oxadiazol ring. A possible mechanism, as well as structural analysis and bioactivity are described.
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Affiliation(s)
- Jianxin Yu
- Advanced Radiological Sciences, Department of Radiology, The University of Texas Southwestern Medical Center at Dallas, 5323 Harry Hines Blvd., Dallas, TX 75390-9058, USA.
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Srivastava RM, de Freitas Filho JR, da Silva MJ, de Melo Souto SC, Carpenter GB, Faustino W. Synthesis, separation and configuration determination of diastereoisomers of (R,S)-1-methyl-3-[3-(aryl)-1,2,4-oxadiazol-5-yl] propyl 2,3-dideoxy-α-d-erythro-hex-2-enopyranosides. Tetrahedron 2004. [DOI: 10.1016/j.tet.2004.08.075] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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43
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El Ashry ESH, Abdul-Ghani MM. Reaction of sugars with 2-hydrazinopyridine, precursors for seco C-nucleosides of 1,2,4-triazolo[4,3-a]pyridine. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2004; 23:567-80. [PMID: 15113024 DOI: 10.1081/ncn-120030715] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Reaction of 2-hydrazinopyridine (1) with D-xylose, D-galactose, D-glucose and D-fructose afforded the corresponding hydrazones mainly in the acyclic forms 2, 3, 6 and 11 with minor amounts of the cyclic structures. Oxidative cyclization of the hydrazones with bromine in methanol resulted in the formation of the 3-(polyhydroxyalkyl)-1,2,4-triazolo[4,3-a]pyridine derivatives 13-15 whose acetylation afforded the acetylated derivatives 16-18. Assignment of 1D and 2D NMR spectral data in addition to 15N NMR experiments led to complete characterization of the products.
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Affiliation(s)
- E S H El Ashry
- Chemistry Department, Faculty of Science, Alexandria University, Alexandria, Egypt.
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44
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Hamid HMA. A novel synthesis of acyclonucleosides via allylation of 3-[1-(phenylhydrazono)-l-threo-2,3,4-trihydroxybut-1-yl]quinoxalin-2(1H)one. Carbohydr Res 2003; 338:2301-9. [PMID: 14572714 DOI: 10.1016/s0008-6215(03)00376-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
The allylation of 3-[1-(phenylhydrazono)-L-threo-2,3,4-trihydroxybut-1-yl]quinoxalin-2(1H)one (1) gave, in addition to the anticipated 1-N-allyl derivative (2), a dehydrative cyclized product, 1-N-allyl-3-[5-(hydroxymethyl)-1-phenylpyrazol-3-yl]quinoxalin-2-one (4) and its isomeric O-allyl derivative 3. The O-allyl group in 3 underwent acetolysis under acetylation conditions, in addition to the acetylation of the hydroxyl group, to afford 2-acetoxy-3-[5-(acetoxymethyl)-1-phenylpyrazol-3-yl]quinoxaline (8) instead of the O-acetyl derivative of 3. Allylation of the tri-O-acetyl derivative of 1 caused the elimination of a molecule of acetic acid in addition to N-allylation to give 1-N-allyl-3-[3,4-di-O-acetyl-2-deoxy-1-(phenylhydrazono)but-2-en-1-yl]quinoxalin-2-one (11). Hydroxylation of the allyl group gave a glycerol-1-yl acyclonucleoside which can be alternatively obtained by a displacement reaction of the tosyloxy group in 2,3-O-isopropylidene-1-O-(p-tolylsulfonyl)glycerol (14), followed by deisopropylidenation. 1-N-(2,3-Dibromopropyl)-3-[5-(hydroxymethyl)-1-(4-bromophenyl)pyrazol-3-yl]quinoxalin-2-one (15) underwent azidolysis to give a 2,3-diazido derivative. The assigned structures were based on spectral analysis. The activity of compounds 2, 4, 6, and 15 against hepatitis B virus was studied.
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Haikal AZ, El Ashry ESH, Banoub J. Synthesis and structural characterization of 1-(d-glycosyloxy)phthalazines. Carbohydr Res 2003; 338:2291-9. [PMID: 14572713 DOI: 10.1016/j.carres.2003.08.016] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Coupling of the trimethylsilyl derivative of (2H)phthalazin-1-one with 1,2,3,4,6-penta-O-acetyl-alpha-D-glucopyranose and 1,2,3,4,6-penta-O-acetyl-alpha-D-galactopyranose in the presence of stannic chloride gave the respective glycosides, 2-(per-O-acetyl-D-glycosyloxy)phthalazines, which upon deacetylation gave the respective unprotected analogues. Under the same conditions 1,2,3,5-tetra-O-acetyl-beta-D-ribofuranose gave 1-(2,3,5-tri-O-acetyl-alpha-D-ribofuranosyloxy)phthalazine. Electrospray mass spectrometry aided the structural characterization of this series of 1-(D-glycosylyloxy)phthalazines. Low energy collisionally-induced dissociation tandem mass spectrometry of the protonated molecules confirmed the MS fragmentation routes and the structural identities of this novel series of glycosides.
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Affiliation(s)
- Abdellfattah Z Haikal
- Department of Chemistry, Faculty of Science, University of United Arab Emirates, PO Box 17551, Alain, United Arab Emirates
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Chiacchio U, Corsaro A, Mates J, Merino P, Piperno A, Rescifina A, Romeo G, Romeo R, Tejero T. Isoxazolidine analogues of pseudouridine: a new class of modified nucleosides. Tetrahedron 2003. [DOI: 10.1016/s0040-4020(03)00689-6] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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47
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Nasr AZ. Synthesis of double headed imidazoline acyclo C-nucleosides: 1,4-bis[1-amino-5-oxo-4-substituted(imidazolin-2-yl)]galacto-tetritols. NUCLEOSIDES, NUCLEOTIDES & NUCLEIC ACIDS 2003; 22:349-57. [PMID: 12816392 DOI: 10.1081/ncn-120021433] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Condensation of 2,3,4,5-tetra-O-acetyl-galactaroyl dichloride (1) with two equivalents of the alpha-amino esters 2a-c gave the corresponding 2,3,4,5-tetra-O-acetyl-galactaric acid diamides 3a-c. Heterocyclization of 3a-c by heating with hydrazine hydrate took place with concomitant de-O-acetylation of the polyacetoxyalkyl chain to give 1,4-bis[1-amino-5-oxo-4-substituted(imidazolin-2-yl)] galacto-tetritols (5a-c) and not the theoretically possible 1,2,4-triazinones 4 as indicated by spectral data. Compounds 5a-c readily reacted with p-nitrobenzaldehyde to give the corresponding p-nitrobenzylideneamino derivatives 6a-c. Acetylation of 5a-c afforded the 2,3,4,5-tetra-O-acetyl-1,4-bis[1-acetamido-5-oxo-4-substituted(imidazolin-2-yl)]galacto-tetritols (7a,b,d). De-O-acetylation of 7a,b,d gave 1,4-bis[1-acetamido-5-oxo-4-substituted (imidazolin-2-yl)]galacto-tetritols (8a-c).
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Affiliation(s)
- Adel Z Nasr
- Department of Chemistry, Faculty of Science, Cairo University, Faiyoum, Egypt.
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Bravo F, Viso A, Castillón S. An expeditious and efficient procedure for the synthesis of unsaturated acyclonucleosides of Z configuration related to D4T. J Org Chem 2003; 68:1172-5. [PMID: 12558456 DOI: 10.1021/jo010948r] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Enantiopure 2,5-dihydrofuran derivatives were prepared from (S)-glycidol through a new reaction sequence involving epoxide opening with a vinylcuprate, selenium-induced cyclization to give exclusively the 5-endo product, and regioselective selenoxide elimination. Unsaturated acyclonucleosides of Z configuration were obtained in a straightforward manner by treating 2,5-dihydrofuran with iodotrimethylsilane in the presence of silylated purinic or pyrimidinic bases. This synthetic process involves opening of the dihydrofuran ring by trimethylsilyl iodide and substitution of iodine by the nucleic base in a single reaction step.
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Affiliation(s)
- Fernando Bravo
- Departament de Química Analítica i Química Orgànica, Facultat de Química, Universitat Rovira i Virgili, Pza. Imperial Tarraco 1, 43005 Tarragona, Spain
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49
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Ashry ESHE, Kilany YE, Hamid HA, El-Zemity SR, Boghdady S. synthesis of Functionalised derivatives of Pentaerythritol. JOURNAL OF CHEMICAL RESEARCH 2003. [DOI: 10.3184/030823403103172887] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The synthesis of functionalised derivatives of pentaerythritol has been attempted by the reaction of 1 with different aldehydes and nucleophilic reagents; the activity of various derivatives against hepatitis B virus has been studied.
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Affiliation(s)
- E. S. H. El Ashry
- Department of Chemistry, Faculty of Science, Alexandria University, Alexandria, Egypt
| | - Y. El Kilany
- Department of Chemistry, Faculty of Science, Alexandria University, Alexandria, Egypt
| | - H. Abdel Hamid
- Department of Chemistry, Faculty of Science, Alexandria University, Alexandria, Egypt
| | - S. R. El-Zemity
- Department of Pesticide Chemistry, Faculty of Agriculture, Alexandria University, Alexandria, Egypt
| | - S. Boghdady
- Department of Chemistry, Faculty of Science, Alexandria University, Alexandria, Egypt
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Affiliation(s)
- Tanmaya Pathak
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721 302, India.
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