1
|
Eletskaya BZ, Mironov AF, Fateev IV, Berzina MY, Antonov KV, Smirnova OS, Zatsepina AB, Arnautova AO, Abramchik YA, Paramonov AS, Kayushin AL, Khandazhinskaya AL, Matyugina ES, Kochetkov SN, Miroshnikov AI, Mikhailopulo IA, Esipov RS, Konstantinova ID. Enzymatic Transglycosylation Features in Synthesis of 8-Aza-7-Deazapurine Fleximer Nucleosides by Recombinant E. coli PNP: Synthesis and Structure Determination of Minor Products. Biomolecules 2024; 14:798. [PMID: 39062512 PMCID: PMC11275124 DOI: 10.3390/biom14070798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2024] [Revised: 06/30/2024] [Accepted: 07/01/2024] [Indexed: 07/28/2024] Open
Abstract
Enzymatic transglycosylation of the fleximer base 4-(4-aminopyridine-3-yl)-1H-pyrazole using recombinant E. coli purine nucleoside phosphorylase (PNP) resulted in the formation of "non-typical" minor products of the reaction. In addition to "typical" N1-pyrazole nucleosides, a 4-imino-pyridinium riboside and a N1-pyridinium-N1-pyrazole bis-ribose derivative were formed. N1-Pyrazole 2'-deoxyribonucleosides and a N1-pyridinium-N1-pyrazole bis-2'-deoxyriboside were formed. But 4-imino-pyridinium deoxyriboside was not formed in the reaction mixture. The role of thermodynamic parameters of key intermediates in the formation of reaction products was elucidated. To determine the mechanism of binding and activation of heterocyclic substrates in the E. coli PNP active site, molecular modeling of the fleximer base and reaction products in the enzyme active site was carried out. As for N1-pyridinium riboside, there are two possible locations for it in the PNP active site. The presence of a relatively large space in the area of amino acid residues Phe159, Val178, and Asp204 allows the ribose residue to fit into that space, and the heterocyclic base can occupy a position that is suitable for subsequent glycosylation. Perhaps it is this "upside down" arrangement that promotes secondary glycosylation and the formation of minor bis-riboside products.
Collapse
Affiliation(s)
- Barbara Z. Eletskaya
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow 117997, Russia; (B.Z.E.); (A.F.M.); (I.V.F.); (M.Y.B.); (O.S.S.); (A.B.Z.); (A.O.A.); (Y.A.A.); (A.S.P.); (A.L.K.); (R.S.E.)
| | - Anton F. Mironov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow 117997, Russia; (B.Z.E.); (A.F.M.); (I.V.F.); (M.Y.B.); (O.S.S.); (A.B.Z.); (A.O.A.); (Y.A.A.); (A.S.P.); (A.L.K.); (R.S.E.)
- Institute of Biochemical Technology and Nanotechnology, Peoples’ Friendship University of Russia Named after Patrice Lumumba, Miklukho-Maklaya St. 6, Moscow 117198, Russia
| | - Ilya V. Fateev
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow 117997, Russia; (B.Z.E.); (A.F.M.); (I.V.F.); (M.Y.B.); (O.S.S.); (A.B.Z.); (A.O.A.); (Y.A.A.); (A.S.P.); (A.L.K.); (R.S.E.)
| | - Maria Ya. Berzina
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow 117997, Russia; (B.Z.E.); (A.F.M.); (I.V.F.); (M.Y.B.); (O.S.S.); (A.B.Z.); (A.O.A.); (Y.A.A.); (A.S.P.); (A.L.K.); (R.S.E.)
| | - Konstantin V. Antonov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow 117997, Russia; (B.Z.E.); (A.F.M.); (I.V.F.); (M.Y.B.); (O.S.S.); (A.B.Z.); (A.O.A.); (Y.A.A.); (A.S.P.); (A.L.K.); (R.S.E.)
| | - Olga S. Smirnova
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow 117997, Russia; (B.Z.E.); (A.F.M.); (I.V.F.); (M.Y.B.); (O.S.S.); (A.B.Z.); (A.O.A.); (Y.A.A.); (A.S.P.); (A.L.K.); (R.S.E.)
| | - Alexandra B. Zatsepina
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow 117997, Russia; (B.Z.E.); (A.F.M.); (I.V.F.); (M.Y.B.); (O.S.S.); (A.B.Z.); (A.O.A.); (Y.A.A.); (A.S.P.); (A.L.K.); (R.S.E.)
| | - Alexandra O. Arnautova
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow 117997, Russia; (B.Z.E.); (A.F.M.); (I.V.F.); (M.Y.B.); (O.S.S.); (A.B.Z.); (A.O.A.); (Y.A.A.); (A.S.P.); (A.L.K.); (R.S.E.)
| | - Yulia A. Abramchik
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow 117997, Russia; (B.Z.E.); (A.F.M.); (I.V.F.); (M.Y.B.); (O.S.S.); (A.B.Z.); (A.O.A.); (Y.A.A.); (A.S.P.); (A.L.K.); (R.S.E.)
| | - Alexander S. Paramonov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow 117997, Russia; (B.Z.E.); (A.F.M.); (I.V.F.); (M.Y.B.); (O.S.S.); (A.B.Z.); (A.O.A.); (Y.A.A.); (A.S.P.); (A.L.K.); (R.S.E.)
| | - Alexey L. Kayushin
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow 117997, Russia; (B.Z.E.); (A.F.M.); (I.V.F.); (M.Y.B.); (O.S.S.); (A.B.Z.); (A.O.A.); (Y.A.A.); (A.S.P.); (A.L.K.); (R.S.E.)
| | - Anastasia L. Khandazhinskaya
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 32 Vavilov St., Moscow 119991, Russia; (A.L.K.); (E.S.M.); (S.N.K.)
| | - Elena S. Matyugina
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 32 Vavilov St., Moscow 119991, Russia; (A.L.K.); (E.S.M.); (S.N.K.)
| | - Sergey N. Kochetkov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 32 Vavilov St., Moscow 119991, Russia; (A.L.K.); (E.S.M.); (S.N.K.)
| | - Anatoly I. Miroshnikov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow 117997, Russia; (B.Z.E.); (A.F.M.); (I.V.F.); (M.Y.B.); (O.S.S.); (A.B.Z.); (A.O.A.); (Y.A.A.); (A.S.P.); (A.L.K.); (R.S.E.)
| | - Igor A. Mikhailopulo
- Institute of Bioorganic Chemistry, National Academy of Sciences, Acad. Kuprevicha 5/2, 220141 Minsk, Belarus;
| | - Roman S. Esipov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow 117997, Russia; (B.Z.E.); (A.F.M.); (I.V.F.); (M.Y.B.); (O.S.S.); (A.B.Z.); (A.O.A.); (Y.A.A.); (A.S.P.); (A.L.K.); (R.S.E.)
| | - Irina D. Konstantinova
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow 117997, Russia; (B.Z.E.); (A.F.M.); (I.V.F.); (M.Y.B.); (O.S.S.); (A.B.Z.); (A.O.A.); (Y.A.A.); (A.S.P.); (A.L.K.); (R.S.E.)
| |
Collapse
|
2
|
Eletskaya BZ, Berzina MY, Fateev IV, Kayushin AL, Dorofeeva EV, Lutonina OI, Zorina EA, Antonov KV, Paramonov AS, Muzyka IS, Zhukova OS, Kiselevskiy MV, Miroshnikov AI, Esipov RS, Konstantinova ID. Enzymatic Synthesis of 2-Chloropurine Arabinonucleosides with Chiral Amino Acid Amides at the C6 Position and an Evaluation of Antiproliferative Activity In Vitro. Int J Mol Sci 2023; 24:ijms24076223. [PMID: 37047197 PMCID: PMC10094600 DOI: 10.3390/ijms24076223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 03/13/2023] [Accepted: 03/22/2023] [Indexed: 03/29/2023] Open
Abstract
A number of purine arabinosides containing chiral amino acid amides at the C6 position of the purine were synthesized using a transglycosylation reaction with recombinant E. coli nucleoside phosphorylases. Arsenolysis of 2-chloropurine ribosides with chiral amino acid amides at C6 was used for the enzymatic synthesis, and the reaction equilibrium shifted towards the synthesis of arabinonucleosides. The synthesized nucleosides were shown to be resistant to the action of E. coli adenosine deaminase. The antiproliferative activity of the synthesized nucleosides was studied on human acute myeloid leukemia cell line U937. Among all the compounds, the serine derivative exhibited an activity level (IC50 = 16 μM) close to that of Nelarabine (IC50 = 3 μM) and was evaluated as active.
Collapse
Affiliation(s)
- Barbara Z. Eletskaya
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya St. 16/10, 117997 Moscow, Russia
- Correspondence: (B.Z.E.); (I.D.K.)
| | - Maria Ya. Berzina
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya St. 16/10, 117997 Moscow, Russia
| | - Ilya V. Fateev
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya St. 16/10, 117997 Moscow, Russia
| | - Alexei L. Kayushin
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya St. 16/10, 117997 Moscow, Russia
| | - Elena V. Dorofeeva
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya St. 16/10, 117997 Moscow, Russia
| | - Olga I. Lutonina
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya St. 16/10, 117997 Moscow, Russia
| | - Ekaterina A. Zorina
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya St. 16/10, 117997 Moscow, Russia
| | - Konstantin V. Antonov
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya St. 16/10, 117997 Moscow, Russia
| | - Alexander S. Paramonov
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya St. 16/10, 117997 Moscow, Russia
| | - Inessa S. Muzyka
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya St. 16/10, 117997 Moscow, Russia
| | - Olga S. Zhukova
- State N.N. Blokhin Russian Cancer Research Center, Kashirsky Highway, 24, 115478 Moscow, Russia
| | - Mikhail V. Kiselevskiy
- State N.N. Blokhin Russian Cancer Research Center, Kashirsky Highway, 24, 115478 Moscow, Russia
| | - Anatoly I. Miroshnikov
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya St. 16/10, 117997 Moscow, Russia
| | - Roman S. Esipov
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya St. 16/10, 117997 Moscow, Russia
| | - Irina D. Konstantinova
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya St. 16/10, 117997 Moscow, Russia
- Correspondence: (B.Z.E.); (I.D.K.)
| |
Collapse
|
3
|
Jiang Q, Liu X, Wang W, Chen Y, Yu M. Metal-free direct C-6-H alkylation of purines and purine nucleosides enabled by oxidative homolysis of 4-alkyl-1,4-dihydropyridines at room temperature. Org Biomol Chem 2023; 21:1744-1754. [PMID: 36723234 DOI: 10.1039/d2ob02070j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Herein we report the application of 4-alkyl-1,4-dihydropyridines (DHPs), which are easily prepared from inexpensive aldehydes in one step, for the direct site-specific C-H alkylation of purines and purine nucleosides. Despite there being three active C(sp2)-H bonds (C-2-H, C-6-H, and C-8-H) in the structure, the reactions still show high regioselectivity at the purinyl C-6-H position. Importantly, the reactions successfully avoid the use of transition metal catalysts and additional acids. Meanwhile, the protocols are not sensitive to moisture and require only persulfate as an oxidant. Besides, this method displays broad functional group compatibility and is easy to scale up. Notably, pharmaceutical purines, e.g. the natural product 6-hydroxymethyl nebularine isolated from basidiomycetes, can be smoothly prepared using this protocol.
Collapse
Affiliation(s)
- Qingsong Jiang
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, Shandong Province, P. R. China.
| | - Xiguang Liu
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, Shandong Province, P. R. China.
| | - Weili Wang
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, Shandong Province, P. R. China.
| | - Yiwen Chen
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, Shandong Province, P. R. China.
| | - Mingwu Yu
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, Shandong Province, P. R. China.
| |
Collapse
|
4
|
Liu G, Mu X, Tian M, Wang W, Zou C, Chen Y, Yu M. Metal‐Free, Light‐Mediated, Site‐Specific, Radical C6−H Alkylation of Purines with Alcohols Intervened by Oxalates without Catalysts. European J Org Chem 2023. [DOI: 10.1002/ejoc.202201491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Affiliation(s)
- Gang Liu
- School of Chemistry and Materials Science Ludong University Yantai 264025 Shandong Province P. R. China
| | - Xianfeng Mu
- School of Chemistry and Materials Science Ludong University Yantai 264025 Shandong Province P. R. China
| | - Miao Tian
- College of Chemistry and Chemical Engineering Yantai University Yantai 264025 Shandong Province P. R. China
| | - Weili Wang
- School of Chemistry and Materials Science Ludong University Yantai 264025 Shandong Province P. R. China
| | - Chunhui Zou
- School of Chemistry and Materials Science Ludong University Yantai 264025 Shandong Province P. R. China
| | - Yiwen Chen
- School of Chemistry and Materials Science Ludong University Yantai 264025 Shandong Province P. R. China
| | - Mingwu Yu
- School of Chemistry and Materials Science Ludong University Yantai 264025 Shandong Province P. R. China
| |
Collapse
|
5
|
Yu M, Jiang Q, Liu X, Chen Y, Sun K, Tian M, Wang W. Regiospecificity C(sp 2)-C(sp 3) Bond Construction between Purines and Alkenes to Synthesize C 6-Alkylpurines and Purine Nucleosides Using O 2 as the Oxidant. J Org Chem 2023; 88:1411-1423. [PMID: 36634372 DOI: 10.1021/acs.joc.2c02277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
A highly site-selective and Markovnikov-type radical C6-H alkylation of purines with alkenes is achieved, allowing fast construction of the C(sp2)-C(sp3) bond at the C-6-position of purines and purine nucleosides using O2 as a green oxidant and alkenes as cheap alkylation reagents. The route was also a radical route to synthesize C6-alkyl-N7-substituted purines with potential steric hindrance between C6-alkyl groups and N7-substituted groups. This reaction is easily scaled up and has excellent functional group compatibility and broad substrate scopes. Moreover, the unstable intermediate was also separated, which was the key evidence for the reaction mechanism.
Collapse
Affiliation(s)
- Mingwu Yu
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, P. R. China
| | - Qingsong Jiang
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, P. R. China
| | - Xiguang Liu
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, P. R. China
| | - Yiwen Chen
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, P. R. China
| | - Kai Sun
- College of Chemistry and Chemical Engineering, Yantai University, Yantai 264025, Shandong, P. R. China
| | - Miao Tian
- College of Chemistry and Chemical Engineering, Yantai University, Yantai 264025, Shandong, P. R. China
| | - Weili Wang
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, P. R. China
| |
Collapse
|
6
|
Cossy J, Polàk P, Ruer PC. Incorporation of a cyclobutyl substituent in molecules by transition metal-catalyzed cross-coupling reactions. Org Biomol Chem 2022; 20:7529-7553. [PMID: 36148586 DOI: 10.1039/d2ob01045c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this review, the incorporation of a cyclobutyl substituent in molecules, by transition metal-catalyzed cross-coupling, is described by only considering the formation of C-C bonds. Three main strategies are used to introduce a cyclobutyl substituent in molecules by involving either electrophilic or nucleophilic cyclobutane derivatives.
Collapse
Affiliation(s)
- Janine Cossy
- Molecular, Macromolecular chemistry and Materials (C3M), ESPCI Paris, PSL, 10 rue Vauquelin, 75005 Paris, France.
| | - Peter Polàk
- Molecular, Macromolecular chemistry and Materials (C3M), ESPCI Paris, PSL, 10 rue Vauquelin, 75005 Paris, France.
| | - Paul C Ruer
- Molecular, Macromolecular chemistry and Materials (C3M), ESPCI Paris, PSL, 10 rue Vauquelin, 75005 Paris, France.
| |
Collapse
|
7
|
Khandazhinskaya A, Eletskaya B, Fateev I, Kharitonova M, Konstantinova I, Barai V, Azhayev A, Hyvonen MT, Keinanen TA, Kochetkov S, Seley-Radtke K, Khomutov A, Matyugina E. Novel fleximer pyrazole-containing adenosine analogues: chemical, enzymatic and highly efficient biotechnological synthesis. Org Biomol Chem 2021; 19:7379-7389. [PMID: 34198312 DOI: 10.1039/d1ob01069g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nucleoside analogues have long served as key chemotherapeutic drugs for the treatment of viral infections and cancers. Problems associated with the development of drug resistance have led to a search for the design of nucleosides capable of bypassing point mutations in the target enzyme's binding site. As a possible answer to this, the Seley-Radtke group developed a flexible nucleoside scaffold (fleximers), where the heterocyclic purine base is split into its two components, i.e. pyrimidine and imidazole. Herein, we present a series of new pyrazole-containing flex-bases and the corresponding fleximer analogues of 8-aza-7-deaza nucleosides. Subsequent studies found that pyrazole-containing flex-bases are substrates of purine nucleoside phosphorylase (PNP). We have compared the chemical synthesis of fleximers and enzymatic approaches with both isolated enzymes and the use of E. coli cells overproducing PNP. The latter provided stereochemically pure pyrazole-containing β-d-ribo- and β-d-2'-deoxyribo-fleximers and are beneficial in terms of environmental issues, are more economical, and streamline the steps required from a chemical approach. The reaction is carried out in water, avoiding hazardous chemicals, and the products are isolated by ion-exchange chromatography using water/ethanol mixtures for elution. Moreover, the target nucleosides were obtained on a multi-milligram scale with >97-99% purity, and the reactions can be easily scaled up.
Collapse
Affiliation(s)
- Anastasia Khandazhinskaya
- Engelhardt Institute of Molecular Biology of the Russian Academy of Sciences, 32 Vavilov St., Moscow 119991, Russia
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
8
|
Perkins JJ, Shurtleff VW, Johnson AM, El Marrouni A. Synthesis of C6-Substituted Purine Nucleoside Analogues via Late-Stage Photoredox/Nickel Dual Catalytic Cross-Coupling. ACS Med Chem Lett 2021; 12:662-666. [PMID: 33859805 DOI: 10.1021/acsmedchemlett.0c00673] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Accepted: 02/24/2021] [Indexed: 12/24/2022] Open
Abstract
Nucleoside analogues have been and continue to be extremely important compounds in drug discovery. Despite the significant effort dedicated to their synthesis, medicinal chemistry campaigns around these structures are often hampered by synthetic challenges. We describe a strategy for the functionalization of purine nucleosides via photoredox and nickel-catalyzed sp2-sp3 cross-coupling. The conditions described herein allow for coupling of unprotected nucleosides with readily available alkyl bromides, providing opportunities for their application to parallel medicinal chemistry.
Collapse
Affiliation(s)
- James J. Perkins
- Merck & Co., Inc., 770 Sumneytown Pike, West Point, Pennsylvania 19486, United States
| | - Valerie W. Shurtleff
- Merck & Co., Inc., 770 Sumneytown Pike, West Point, Pennsylvania 19486, United States
| | - Alayna M. Johnson
- Merck & Co., Inc., 770 Sumneytown Pike, West Point, Pennsylvania 19486, United States
| | | |
Collapse
|
9
|
Hassan AEA, Abou-Elkhair RAI, Maaroof HM, Secrist JA. Synthesis of 9-(6-Deoxy-α-L-Talofuranosyl)-6-Methylpurine and 9-(6-Deoxy-β-D-Allofuranosyl)-6-Methylpurine Nucleosides. ACTA ACUST UNITED AC 2020; 81:e105. [PMID: 32255553 DOI: 10.1002/cpnc.105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
6-Methylpurine (MeP) is a cytotoxic adenine analog that does not exhibit selectivity when administered systemically and could be very useful in a gene therapy approach to cancer treatment involving Escherichia coli purine nucleoside phosphorylase (PNP). 9-(6-Deoxy-β-D-allofuranosyl)-6-methylpurine [methyl(allo)-MePR, 18] and 9-(6-deoxy-α-L-talofuranosyl)-6-methylpurine [methyl(talo)-MePR, 21] were synthesized as potential prodrugs for MeP in the E. coli PNP/prodrug cancer gene therapy approach. The detailed syntheses of [methyl(allo)-MePR] and [methyl(talo)-MePR] are described. The glycosyl donors, 1,2-di-O-acetyl-3,5-di-O-benzyl-α-D-allofuranose (12) and 1-O-acetyl-3-O-benzyl-2,5-di-O-benzoyl-α-L-talofuranose (16) were prepared from 1,2:5,6-di-O-isopropylidene-α-D-glucofuranose (4) in nine and eleven steps, respectively. Vorbrüggen coupling of the latter glycosyl donors with 6-methylpurine (3), followed by deprotection of the sugar hydroxyl groups, gave the title compounds in good overall yields. © 2020 by John Wiley & Sons, Inc. Basic Protocol 1: Preparation of 6-methylpurine Basic Protocol 2: Preparation of the D-allofuranose derivative (12) Basic Protocol 3: Preparation of 6-deoxy-α-L-talofuranoside Basic Protocol 4: Preparation of methyl(allo)-MePR (18) Basic Protocol 5: Preparation of methyl(talo)-MePR (21).
Collapse
Affiliation(s)
- Abdalla E A Hassan
- Southern Research Institute, Birmingham, Alabama.,Applied Nucleic Acids Research Center, Zagazig University, Egypt
| | | | - Hend M Maaroof
- Applied Nucleic Acids Research Center, Zagazig University, Egypt
| | | |
Collapse
|
10
|
Eletskaya BZ, Gruzdev DA, Krasnov VP, Levit GL, Kostromina MA, Paramonov AS, Kayushin AL, Muzyka IS, Muravyova TI, Esipov RS, Andronova VL, Galegov GA, Charushin VN, Miroshnikov AI, Konstantinova ID. Enzymatic synthesis of novel purine nucleosides bearing a chiral benzoxazine fragment. Chem Biol Drug Des 2019; 93:605-616. [PMID: 30561886 DOI: 10.1111/cbdd.13458] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Revised: 11/28/2018] [Accepted: 12/07/2018] [Indexed: 12/01/2022]
Abstract
A series of ribo- and deoxyribonucleosides bearing 2-aminopurine as a nucleobase with 7,8-difluoro- 3,4-dihydro-3-methyl-2H-[1,4]benzoxazine (conjugated directly or through an aminohexanoyl spacer) was synthesized using an enzymatic transglycosylation reaction. Nucleosides 3-6 were resistant to deamination under action of adenosine deaminase (ADA) Escherichia coli and ADA from calf intestine. The antiviral activity of the modified nucleosides was evaluated against herpes simplex virus type 1 (HSV-1, strain L2). It has been shown that at sub-toxic concentrations, nucleoside (S)-4-[2-amino-9-(β-D-ribofuranosyl)-purin-6-yl]-7,8-difluoro-3,4-dihydro-3-methyl-2H-[1,4]benzoxazine exhibit significant antiviral activity (SI > 32) on the model of HSV-1 in vitro, including an acyclovir-resistant virus strain (HSV-1, strain L2/R).
Collapse
Affiliation(s)
- Barbara Z Eletskaya
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, Russia
| | - Dmitry A Gruzdev
- Postovsky Institute of Organic Synthesis, Russian Academy of Sciences (Ural Branch), Ekaterinburg, Russia
| | - Victor P Krasnov
- Postovsky Institute of Organic Synthesis, Russian Academy of Sciences (Ural Branch), Ekaterinburg, Russia
| | - Galina L Levit
- Postovsky Institute of Organic Synthesis, Russian Academy of Sciences (Ural Branch), Ekaterinburg, Russia
| | - Maria A Kostromina
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, Russia
| | - Alexander S Paramonov
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, Russia
| | - Alexei L Kayushin
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, Russia
| | - Inessa S Muzyka
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, Russia
| | - Tatyana I Muravyova
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, Russia
| | - Roman S Esipov
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, Russia
| | - Valeria L Andronova
- Ivanovsky Institute of Virology (Gamaleya Research Center of Epidemiology and Microbiology, Ministry of Healthcare of the Russian Federation), Moscow, Russia
| | - Georgiy A Galegov
- Ivanovsky Institute of Virology (Gamaleya Research Center of Epidemiology and Microbiology, Ministry of Healthcare of the Russian Federation), Moscow, Russia
| | - Valery N Charushin
- Postovsky Institute of Organic Synthesis, Russian Academy of Sciences (Ural Branch), Ekaterinburg, Russia.,Ural Federal University named after the first President of Russia B.N. Yeltsin, Ekaterinburg, Russia
| | - Anatoly I Miroshnikov
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, Russia
| | - Irina D Konstantinova
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, Russia
| |
Collapse
|
11
|
Chen Y. Recent Advances in Methylation: A Guide for Selecting Methylation Reagents. Chemistry 2018; 25:3405-3439. [DOI: 10.1002/chem.201803642] [Citation(s) in RCA: 119] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Indexed: 11/10/2022]
Affiliation(s)
- Yantao Chen
- Medicinal Chemistry, Cardiovascular, Renal and Metabolism, IMED Biotech UnitAstraZeneca Gothenburg Sweden
| |
Collapse
|
12
|
Meanwell M, Adluri BS, Yuan Z, Newton J, Prevost P, Nodwell MB, Friesen CM, Schaffer P, Martin RE, Britton R. Direct heterobenzylic fluorination, difluorination and trifluoromethylthiolation with dibenzenesulfonamide derivatives. Chem Sci 2018; 9:5608-5613. [PMID: 30061993 PMCID: PMC6050628 DOI: 10.1039/c8sc01221k] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Accepted: 05/25/2018] [Indexed: 12/14/2022] Open
Abstract
Functionalization of heterocyclic scaffolds with mono- or difluoroalkyl groups provides unique opportunities to modulate drug pKa, influence potency and membrane permeability, and attenuate metabolism. While advances in the addition of fluoroalkyl radicals to heterocycles have been made, direct C(sp3)-H heterobenzylic fluorination is comparatively unexplored. Here we demonstrate both mono- and difluorination of a range of alkyl heterocycles using a convenient process that relies on transient sulfonylation by the electrophilic fluorinating agent N-fluorobenzenesulfonimide. We also report heterobenzylic trifluoromethylthiolation and 18F-fluorination, providing a suite of reactions for late-stage C(sp3)-H functionalization of drug leads and radiotracer discovery.
Collapse
Affiliation(s)
- Michael Meanwell
- Department of Chemistry , Simon Fraser University , Burnaby , British Columbia V5A 1S6 , Canada .
| | - Bharani Shashank Adluri
- Department of Chemistry , Simon Fraser University , Burnaby , British Columbia V5A 1S6 , Canada .
| | - Zheliang Yuan
- Department of Chemistry , Simon Fraser University , Burnaby , British Columbia V5A 1S6 , Canada .
- Life Science Division , TRIUMF , Vancouver , BC V6T 2A3 , Canada
| | - Josiah Newton
- Department of Chemistry , Simon Fraser University , Burnaby , British Columbia V5A 1S6 , Canada .
- Department of Chemistry , Trinity Western University , Langley , British Columbia V2Y 1Y1 , Canada
| | - Philippe Prevost
- Department of Chemistry , Simon Fraser University , Burnaby , British Columbia V5A 1S6 , Canada .
| | - Matthew B Nodwell
- Department of Chemistry , Simon Fraser University , Burnaby , British Columbia V5A 1S6 , Canada .
| | - Chadron M Friesen
- Department of Chemistry , Trinity Western University , Langley , British Columbia V2Y 1Y1 , Canada
| | - Paul Schaffer
- Life Science Division , TRIUMF , Vancouver , BC V6T 2A3 , Canada
| | - Rainer E Martin
- Medicinal Chemistry , Roche Pharma Research and Early Development (pRED) , Roche Innovation Center Basel , F. Hoffmann-La Roche Ltd , Grenzacherstrasse 124 , CH-4070 Basel , Switzerland
| | - Robert Britton
- Department of Chemistry , Simon Fraser University , Burnaby , British Columbia V5A 1S6 , Canada .
| |
Collapse
|
13
|
Parker WB, Sorscher EJ. Use of E. coli Purine Nucleoside Phosphorylase in the Treatment of Solid Tumors. Curr Pharm Des 2017; 23:CPD-EPUB-86774. [PMID: 29119917 PMCID: PMC6224313 DOI: 10.2174/1381612823666171109101851] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
BACKGROUND The selective expression of non-human genes in tumor tissue to activate non-toxic compounds (Gene Directed Prodrug Enzyme Therapy, GDEPT) is a novel strategy designed for killing tumor cells in patients with little or no systemic toxicity. Numerous non-human genes have been evaluated, but none have yet been successful in the clinic. METHODS Unlike human purine nucleoside phosphorylase (PNP), E. coli PNP accepts adenine containing nucleosides as substrates, and is therefore able to selectively activate non-toxic purine analogs in tumor tissue. Various in vitro and in vivo assays have been utilized to evaluate E. coli PNP as a potential activating enzyme. RESULTS We and others have demonstrated excellent in vitro and in vivo anti-tumor activity with various GDEPT strategies utilizing E. coli PNP to activate purine nucleoside analogs. A phase I clinical trial utilizing recombinant adenoviral vector for delivery of E. coli PNP to solid tumors followed by systemic administration of fludarabine phosphate (NCT01310179; IND# 14271) has recently been completed. In this trial, significant anti-tumor activity was demonstrated with negligible toxicity related to the therapy. The mechanism of cell kill (inhibition of RNA and protein synthesis) is distinct from all currently used anticancer drugs and all experimental compounds under development. The approach has demonstrated excellent ability to kill neighboring tumor cells that do not express E. coli PNP, is active against non-proliferating and proliferating tumors cells (as well as tumor stem cells, stroma), and is therefore very effective against solid tumors with a low growth fraction. CONCLUSION The unique attributes distinguish this approach from other GDEPT strategies and are precisely those required to mediate significant improvements in antitumor therapy.
Collapse
|
14
|
Buchanan HS, Pauff SM, Kosmidis TD, Taladriz-Sender A, Rutherford OI, Hatit MZC, Fenner S, Watson AJB, Burley GA. Modular, Step-Efficient Palladium-Catalyzed Cross-Coupling Strategy To Access C6-Heteroaryl 2-Aminopurine Ribonucleosides. Org Lett 2017; 19:3759-3762. [PMID: 28682638 DOI: 10.1021/acs.orglett.7b01602] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Two Pd-catalyzed methods to access 6-heteroaryl 2-aminopurine ribonucleosides from 6-chloroguanosine are described. First, Pd-132-catalyzed Suzuki-Miyaura cross-coupling using a series of boron substrates and 6-chloroguanosine forms 6-heteroaryl-2-aminopurines in a single step. The versatility of 6-chloroguanosine is further demonstrated using a modified Sonogashira coupling employing potassium iodide as an additive. Finally, the utility of the 6-alkynyl-2-aminopurine ribonucleoside as a dipolarophile in [3 + 2] cycloadditions is presented, affording triazoles and isoxazoles when reacted with azide and isonitrile 1,3-dipoles, respectively.
Collapse
Affiliation(s)
- Helena S Buchanan
- Department of Pure & Applied Chemistry, University of Strathclyde , 295 Cathedral Street, Glasgow G1 1XL, U.K
| | - Steven M Pauff
- Department of Pure & Applied Chemistry, University of Strathclyde , 295 Cathedral Street, Glasgow G1 1XL, U.K
| | - Tilemachos D Kosmidis
- Department of Pure & Applied Chemistry, University of Strathclyde , 295 Cathedral Street, Glasgow G1 1XL, U.K
| | - Andrea Taladriz-Sender
- Department of Pure & Applied Chemistry, University of Strathclyde , 295 Cathedral Street, Glasgow G1 1XL, U.K
| | - Olivia I Rutherford
- Department of Pure & Applied Chemistry, University of Strathclyde , 295 Cathedral Street, Glasgow G1 1XL, U.K
| | - Marine Z C Hatit
- Department of Pure & Applied Chemistry, University of Strathclyde , 295 Cathedral Street, Glasgow G1 1XL, U.K
| | - Sabine Fenner
- GlaxoSmithKline, Medicines Research Centre, Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, U.K
| | - Allan J B Watson
- Department of Pure & Applied Chemistry, University of Strathclyde , 295 Cathedral Street, Glasgow G1 1XL, U.K
| | - Glenn A Burley
- Department of Pure & Applied Chemistry, University of Strathclyde , 295 Cathedral Street, Glasgow G1 1XL, U.K
| |
Collapse
|
15
|
Synthesis of 8-alkoxy-6-alkylamino-2-alkylthiopurine nucleosides with a straightforward multiple-functionalization strategy. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.05.057] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
16
|
Tosh DK, Ciancetta A, Warnick E, O'Connor R, Chen Z, Gizewski E, Crane S, Gao ZG, Auchampach JA, Salvemini D, Jacobson KA. Purine (N)-Methanocarba Nucleoside Derivatives Lacking an Exocyclic Amine as Selective A3 Adenosine Receptor Agonists. J Med Chem 2016; 59:3249-63. [PMID: 26890707 PMCID: PMC4970510 DOI: 10.1021/acs.jmedchem.5b01998] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
![]()
Purine
(N)-methanocarba-5′-N-alkyluronamidoriboside
A3 adenosine receptor (A3AR) agonists lacking
an exocyclic amine resulted from an unexpected
reaction during a Sonogashira coupling and subsequent aminolysis.
Because the initial C6-Me and C6-styryl derivatives had unexpectedly
high A3AR affinity, other rigid nucleoside analogues lacking
an exocyclic amine were prepared. Of these, the C6-Me-(2-phenylethynyl)
and C2-(5-chlorothienylethynyl) analogues were particularly potent,
with human A3AR Ki values of
6 and 42 nM, respectively. Additionally, the C2-(5-chlorothienyl)-6-H
analogue was potent and selective at A3AR (MRS7220, Ki 60 nM) and also completely reversed mouse
sciatic nerve mechanoallodynia (in vivo, 3 μmol/kg, po). The
lack of a C6 H-bond donor while maintaining A3AR affinity
and efficacy could be rationalized by homology modeling and docking
of these hypermodified nucleosides. The modeling suggests that a suitable
combination of stabilizing features can partially compensate for the
lack of an exocyclic amine, an otherwise important contributor to
recognition in the A3AR binding site.
Collapse
Affiliation(s)
- Dilip K Tosh
- Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health , Building 8A, Room B1A-19, Bethesda, Maryland 20892-0810, United States
| | - Antonella Ciancetta
- Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health , Building 8A, Room B1A-19, Bethesda, Maryland 20892-0810, United States
| | - Eugene Warnick
- Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health , Building 8A, Room B1A-19, Bethesda, Maryland 20892-0810, United States
| | - Robert O'Connor
- Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health , Building 8A, Room B1A-19, Bethesda, Maryland 20892-0810, United States
| | - Zhoumou Chen
- Department of Pharmacological and Physiological Science, Saint Louis University School of Medicine , St. Louis, Missouri 63104, United States
| | - Elizabeth Gizewski
- Department of Pharmacology, Medical College of Wisconsin , 8701 Watertown Plank Road, Milwaukee, Wisconsin 53226, United States
| | - Steven Crane
- Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health , Building 8A, Room B1A-19, Bethesda, Maryland 20892-0810, United States
| | - Zhan-Guo Gao
- Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health , Building 8A, Room B1A-19, Bethesda, Maryland 20892-0810, United States
| | - John A Auchampach
- Department of Pharmacology, Medical College of Wisconsin , 8701 Watertown Plank Road, Milwaukee, Wisconsin 53226, United States
| | - Daniela Salvemini
- Department of Pharmacological and Physiological Science, Saint Louis University School of Medicine , St. Louis, Missouri 63104, United States
| | - Kenneth A Jacobson
- Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health , Building 8A, Room B1A-19, Bethesda, Maryland 20892-0810, United States
| |
Collapse
|
17
|
Hassan AEA, Abou-Elkhair RAI, Parker WB, Allan PW, Secrist JA. 6-Methylpurine derived sugar modified nucleosides: Synthesis and evaluation of their substrate activity with purine nucleoside phosphorylases. Bioorg Chem 2015; 65:9-16. [PMID: 26745284 DOI: 10.1016/j.bioorg.2015.12.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2015] [Revised: 12/22/2015] [Accepted: 12/23/2015] [Indexed: 01/10/2023]
Abstract
6-Methylpurine (MeP) is cytotoxic adenine analog that does not exhibit selectivity when administered systemically, and could be very useful in a gene therapy approach to cancer treatment involving Escherichia coli PNP. The prototype MeP releasing prodrug, 9-(β-d-ribofuranosyl)-6-methylpurine, MeP-dR has demonstrated good activity against tumors expressing E. coli PNP, but its antitumor activity is limited due to toxicity resulting from the generation of MeP from gut bacteria. Therefore, we have embarked on a medicinal chemistry program to identify non-toxic MeP prodrugs that could be used in conjunction with E. coli PNP. In this work, we report on the synthesis of 9-(6-deoxy-β-d-allofuranosyl)-6-methylpurine (3) and 9-(6-deoxy-5-C-methyl-β-d-ribo-hexofuranosyl)-6-methylpurine (4), and the evaluation of their substrate activity with several phosphorylases. The glycosyl donors; 1,2-di-O-acetyl-3,5-di-O-benzyl-α-d-allofuranose (10) and 1-O-acetyl-3-O-benzyl-2,5-di-O-benzoyl-6-deoxy-5-C-methyl-β-d-ribohexofuran-ose (15) were prepared from 1,2:5,6-di-O-isopropylidine-α-d-glucofuranose in 9 and 11 steps, respectively. Coupling of 10 and 15 with silylated 6-methylpurine under Vorbrüggen glycosylation conditions followed conventional deprotection of the hydroxyl groups furnished 5'-C-methylated-6-methylpurine nucleosides 3 and 4, respectively. Unlike 9-(6-deoxy-α-l-talo-furanosyl)-6-methylpurine, which showed good substrate activity with E. coli PNP mutant (M64V), the β-d-allo-furanosyl derivative 3 and the 5'-di-C-methyl derivative 4 were poor substrates for all tested glycosidic bond cleavage enzymes.
Collapse
Affiliation(s)
- Abdalla E A Hassan
- Southern Research Institute, P.O. Box 55305, Birmingham, AL 35255-5305, USA; Applied Nucleic Acids Research Center, Zagazig University, Egypt.
| | | | - William B Parker
- Southern Research Institute, P.O. Box 55305, Birmingham, AL 35255-5305, USA; PNP Therapeutics Inc., 15 Richard Arrington Jr. Blvd North, Birmingham, AL 35203, USA
| | - Paula W Allan
- Southern Research Institute, P.O. Box 55305, Birmingham, AL 35255-5305, USA
| | - John A Secrist
- Southern Research Institute, P.O. Box 55305, Birmingham, AL 35255-5305, USA
| |
Collapse
|
18
|
D'Errico S, Oliviero G, Borbone N, Nici F, Piccialli V, Pinto B, D'Alonzo D, Mayol L, Piccialli G. Synthesis of C6-Pyridylpurine Nucleosides by Reaction of Nebularine N1-Oxide with Pyridinyl Grignard Reagents. European J Org Chem 2015. [DOI: 10.1002/ejoc.201403648] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
|
19
|
A comprehensive review on bioactive fused heterocycles as purine-utilizing enzymes inhibitors. Med Chem Res 2014. [DOI: 10.1007/s00044-014-1295-3] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
20
|
Hassan AEA, Moustafa AH, Tolbah MM, Zohdy HF, Haikal AZ. Synthesis and antimicrobial evaluation of novel pyrazolones and pyrazolone nucleosides. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2014; 31:783-800. [PMID: 23145949 DOI: 10.1080/15257770.2012.732250] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The synthesis of a novel series of 4-arylhydrazono-5-methyl-1,2-dihydropyrazol-3-ones 4a-h, and their N (2)-alkyl and acyclo, glucopyranosyl, and ribofuranosyl derivatives is described. K(2)CO(3) catalyzed alkylation of 4a-h with allyl bromide, propargyl bromide, 4-bromobutyl acetate, 2-acetoxyethoxymethyl bromide, and 2,3,4,6-tetra-O-acetyl-α-D-glucopyranosyl bromide proceeded selectively at the N (2)-position of the pyrazolinone ring. Glycosylation of 4a with 1,2,3,5-tetra-O-acetyl-β-D-ribofuranose under Vorbruggen glycosylation conditions gave the corresponding N (2)-4-arylhydrazonopyrazolone ribofuranoside 9a in good yield. Conventional deprotection of the acetyl protected nucleosides furnished the corresponding 4-arylhydrazonopyrazolone nucleosides in good yields. Selected numbers of the newly synthesized compounds were screened for antimicrobial activity. Compounds 4b, 12a, and 14 d showed moderate activities against Aspergillus flavus, Penicillium sp., and Escherichia coli.
Collapse
Affiliation(s)
- Abdalla E A Hassan
- Department of Chemistry, Faculty of Science, Zagazig University, Zagazig, Egypt.
| | | | | | | | | |
Collapse
|
21
|
Three practical approaches for the synthesis of novel 4,7-dihetarylpyrazolo[1,5-a][1,3,5]triazines. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.09.029] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
22
|
D'Errico S, Oliviero G, Amato J, Borbone N, Cerullo V, Hemminki A, Piccialli V, Zaccaria S, Mayol L, Piccialli G. Synthesis and biological evaluation of unprecedented ring-expanded nucleosides (RENs) containing the imidazo[4,5-d][1,2,6]oxadiazepine ring system. Chem Commun (Camb) 2012; 48:9310-2. [PMID: 22874871 DOI: 10.1039/c2cc33511e] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
A small collection of ring-expanded nucleosides (RENs), containing the unprecedented bis-alkylated imidazo[4,5-d][1,2,6]oxadiazepine heterocyclic ring system, has been synthesized through a new general approach. Results of preliminary cytotoxicity tests on breast (MCF-7) and lung (A549) cancer cell lines are also reported.
Collapse
Affiliation(s)
- Stefano D'Errico
- Dipartimento di Chimica delle Sostanze Naturali, Università degli Studi di Napoli Federico II, Via D. Montesano 49, 80131, Napoli, Italy
| | | | | | | | | | | | | | | | | | | |
Collapse
|