16321-99-6Relevant articles and documents
A localized tolerance in the substrate specificity of the fluorinase enzyme enables "last-step" 18F fluorination of a RGD peptide under ambient aqueous conditions
Thompson, Stephen,Zhang, Qingzhi,Onega, Mayca,McMahon, Stephen,Fleming, Ian,Ashworth, Sharon,Naismith, James H.,Passchier, Jan,O'Hagan, David
, p. 8913 - 8918 (2014)
A strategy for last-step 18F fluorination of bioconjugated peptides is reported that exploits an "Achilles heel" in the substrate specificity of the fluorinase enzyme. An acetylene functionality at the C-2 position of the adenosine substrate projects from the active site into the solvent. The fluorinase catalyzes a transhalogenation of 5-chlorodeoxy-2- ethynyladenosine (ClDEA) to 5-fluorodeoxy-2-ethynyladenosine (FDEA). Extending a polyethylene glycol linker from the terminus of the acetylene allows the presentation of bioconjugation cargo to the enzyme for 18F labelling. The method uses an aqueous solution (H218O) of [ 18F]fluoride generated by the cyclotron and has the capacity to isotopically label peptides of choice for positron emission tomography (PET).
Synthesis and evaluation of 2-ethynyl-adenosine-5′-triphosphate as a chemical reporter for protein AMPylation
Creech, Christa,Kanaujia, Mukul,Causey, Corey P.
, p. 8550 - 8555 (2015)
Protein AMPylation is a posttranslational modification (PTM) defined as the transfer of an adenosine monophosphate (AMP) from adenosine triphosphate (ATP) to a hydroxyl side-chain of a protein substrate. One recently reported AMPylator enzyme, Vibrio outer protein S (VopS), plays a role in pathogenesis by AMPylation of Rho GTPases, which disrupts crucial signaling pathways, leading to eventual cell death. Given the resurgent interest in this modification, there is a critical need for chemical tools that better facilitate the study of AMPylation and the enzymes responsible for this modification. Herein we report the synthesis of 2-ethynyl-adenosine-5′-triphosphate (2eATP) and its utilization as a non-radioactive chemical reporter for protein AMPylation.
Photoinduced Alkylthiolation of Halogenated Purine Nucleosides
Nair, Vasu,Young, David A.
, p. 450 - 453 (1986)
A new highly efficient methodology for the synthesis of biologically important methylmercaptopurine nucleosides is described.The approach represents a substantial improvement over earlier reported methods for this class of compounds.
On the syntheses of 8-heteroaryl-substituted 9-(β-D-ribofuranosyl)-2,6-diaminopurines through Pd-catalyzed coupling in the presence of cupric oxide
Ozola,Persson,Gronowitz,Hornfeldt
, p. 863 - 866 (1995)
Convenient methods for the preparation of 9-(β-D-ribofuranosyl) derivatives of 8-(2- and 3-thienyl)-2,6-diaminopurine and of 8-(2- and 3-furyl)-2,6-diaminopurine, which are potential antiviral agents has been worked out. The key step was a Pd(0)-catalyzed Stille coupling between 2- and 3-tributylstannylthiophene and 2- and 3-tributylstannylfuran and trimethylsilyl protected 9-(β-D-ribofuranosyl)-2,6-diamino-8-bromopurine. The use of N,N-dimethylformamide as solvent at 110° and dichloro(diphenylphosphine-propane)palladium(II) [PdCl2(dppp)] with cupric oxide as co-reagent was essential in order to obtain a fast reaction and high yields.
Facile, chemoenzymatic synthesis of the potent antiviral compound, 2-acetonylinosine
Gupta, Mukta,Nair, Vasu
, p. 1165 - 1167 (2005)
A facile and efficient methodology for the chemoenzymatic synthesis of the antiviral compound, 2-acetonylinosine has been developed. The present synthetic strategy, which has generality, is a dramatic improvement on the methodologies currently available for the synthesis of functionalized purine nucleosides of therapeutic interest.
A facile synthesis of 2-azidoadenosine derivatives from guanosine as photoaffinity probes
Higashiya, Seiichiro,Kaibara, Chitose,Fukuoka, Koichiro,Suda, Fuminori,Ishikawa, Masahide,Yoshida, Masasuke,Hata, Tsujiaki
, p. 39 - 42 (1996)
2-Azidoadenosine (1) was synthesized in an overall yield of 49% from guanosine via the reaction of 9-(2',3',5'-tri-O-acetyl-β-D-ribofuranosyl)-2-amino-6-chloropurine (2) with isoamyl nitrite and trimethylsilyl azide under neutral and anhydrous conditions. As photoaffinity probes, ATP analogues and the cap structure of eukaryotic mRNA bearing 2-azidoadenosine were synthesized.
Nucleic acid related compounds. 33. Conversions of adenosine and guanosine to 2,6-dichloro, 2-amino-6-chloro, and derived purine nucleosides
Robins,Uznanski
, p. 2601 - 2607 (1981)
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Synthesis and biological evaluation of a novel C8-pyrrolobenzodiazepine (PBD) adenosine conjugate. A study on the role of the PBD ring in the biological activity of PBD-conjugates
Bhakta, Sanjib,Brucoli, Federico,Ferguson, Lindsay,Fox, Keith R.,Wells, Geoff
, (2020/03/19)
Here we sought to evaluate the contribution of the PBD unit to the biological activity of PBD-conjugates and, to this end, an adenosine nucleoside was attached to the PBD A-ring C8 position. A convergent approach was successfully adopted for the synthesis of a novel C8-linked pyrrolo(2,1-c)(1,4)benzodiazepine(PBD)-adenosine(ADN) hybrid. The PBD and adenosine (ADN) moieties were synthesized separately and then linked through a pentynyl linker. To our knowledge, this is the first report of a PBD connected to a nucleoside. Surprisingly, the compound showed no cytotoxicity against murine cells and was inactive against Mycobacterium aurum and M. bovis strains and did not bind to guanine-containing DNA sequences, as shown by DNase I footprinting experiments. Molecular dynamics simulations revealed that the PBD-ADN conjugate was poorly accommodated in the DNA minor groove of two DNA sequences containing the AGA-PBD binding motif, with the adenosine moiety of the ligand preventing the covalent binding of the PBD unit to the guanine amino group of the DNA duplex. These interesting findings shed further light on the ability of the substituents attached at the C8 position of PBDs to affect and modulate the biological and biophysical properties of PBD hybrids.
Essential Structural Profile of Novel Adenosine Derivatives as Antiplatelet Aggregation Inhibitors Based on 3D-QSAR Analysis Using CoMFA, CoMSIA, and SOMFA
Bao, XueFeng,Du, Hongguang,Liu, Guocheng,Lu, Chenghu,Ren, Chaorui,Shunlai, Li
, p. 448 - 457 (2020/06/30)
Abstact: —In this study, comparative molecular field analysis (CoMFA), comparative molecular similarity indices analysis (CoMSIA), and the self-organizing molecular field analysis (SOMFA) were performed on a series of novel adenosine derivatives. Significant correlation coefficients (CoMFA, q2 = 0.560, r2 = 0.940, F value = 71.850, and SEE = 0.097; CoMSIA, q2 = 0.528, r2 = 0.943, F value = 29.29 and SEE = 0.108; SOMFA, r2 = 0.615, r2cr= 0.577, F value = 60.797, and SEE = 0.226) were obtained, and the generated models were validated using test sets. By analyzing the corresponding contour maps in detail, new adenosine derivatives with potential efficacy were designed for synthesis in the future.
Chemical Synthesis of Oligoribonucleotide (ASL of tRNALys T. brucei) Containing a Recently Discovered Cyclic Form of 2-Methylthio-N6-threonylcarbamoyladenosine (ms2ct6A)
Debiec, Katarzyna,Matuszewski, Michal,Podskoczyj, Karolina,Leszczynska, Grazyna,Sochacka, Elzbieta
, (2019/08/26)
The synthesis of the protected form of 2-methylthio-N6-threonylcarbamoyl adenosine (ms2t6A) was developed starting from adenosine or guanosine by using the optimized carbamate method and, for the first time, an isocyanate route. The hypermodified nucleoside was subsequently transformed into the protected ms2t6A-phosphoramidite monomer and used in a large-scale synthesis of the precursor 17nt ms2t6A-oligonucleotide (the anticodon stem and loop fragment of tRNALys from T. brucei). Finally, stereochemically secure ms2t6A→ms2ct6A cyclization at the oligonucleotide level efficiently afforded a tRNA fragment bearing the ms2ct6A unit. The applied post-synthetic approach provides two sequentially homologous ms2t6A- and ms2ct6A-oligonucleotides that are suitable for further comparative structure–activity relationship studies.
