1
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Gimenez Molina A, Raguraman P, Delcomyn L, Veedu RN, Nielsen P. Oligonucleotides containing 2'-O-methyl-5-(1-phenyl-1,2,3-triazol-4-yl)uridines demonstrate increased affinity for RNA and induce exon-skipping in vitro. Bioorg Med Chem 2022; 55:116559. [PMID: 34999527 DOI: 10.1016/j.bmc.2021.116559] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Revised: 12/06/2021] [Accepted: 12/06/2021] [Indexed: 11/21/2022]
Abstract
The nucleotide monomer containing the 1-phenyl-1,2,3-triazole group attached to the 5-position of 2'-O-methyluridine is hereby presented together with a derivative further substituted with a p-sulfonamide group on the phenyl ring. Both were conveniently synthesised, and synergistic effect of the modifications were demonstrated when introduced into oligonucleotides and hybridised to complementary RNA. The combination of stacking of the phenyltriazoles and the conformational steering from the 2'-OMe group gave thermally very stable duplexes. Exon skipping in the distrophin transcript using 20-mer 2'-OMePS sequences with two phenyltriazoles introduced in different positions with and without the sulfonamide demonstrated efficient exon skipping but at the same level as the 2'-OMePS reference ASO.
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Affiliation(s)
- Alejandro Gimenez Molina
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, 5230 Odense M, Denmark
| | - Prithi Raguraman
- Centre for Molecular Medicine and Innovative therapeutics, Murdoch University, Perth 6150, Australia; Perron Institute for Neurological and Translational Science, Perth 6009, Australia
| | - Line Delcomyn
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, 5230 Odense M, Denmark
| | - Rakesh N Veedu
- Centre for Molecular Medicine and Innovative therapeutics, Murdoch University, Perth 6150, Australia; Perron Institute for Neurological and Translational Science, Perth 6009, Australia.
| | - Poul Nielsen
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, 5230 Odense M, Denmark.
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2
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Verma V, Maity J, Maikhuri VK, Sharma R, Ganguly HK, Prasad AK. Double-headed nucleosides: Synthesis and applications. Beilstein J Org Chem 2021; 17:1392-1439. [PMID: 34194579 PMCID: PMC8204177 DOI: 10.3762/bjoc.17.98] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Accepted: 05/27/2021] [Indexed: 12/19/2022] Open
Abstract
Double-headed nucleoside monomers have immense applications for studying secondary nucleic acid structures. They are also well-known as antimicrobial agents. This review article accounts for the synthetic methodologies and the biological applications of double-headed nucleosides.
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Affiliation(s)
- Vineet Verma
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi-110 007, India
| | - Jyotirmoy Maity
- Department of Chemistry, St. Stephen’s College, University of Delhi, Delhi-110 007, India
| | - Vipin K Maikhuri
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi-110 007, India
| | - Ritika Sharma
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi-110 007, India
| | - Himal K Ganguly
- Department of Biophysics, Bose Institute, P1/12 CIT Scheme VIIM, Kolkata-700 054, India
| | - Ashok K Prasad
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi-110 007, India
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3
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Guo CX, Yogendra S, Gomila RM, Frontera A, Hennersdorf F, Steup J, Schwedtmann K, Weigand JJ. A convenient access to fluorophosphonium triflate salts by electrophilic fluorination and anion exchange. Inorg Chem Front 2021. [DOI: 10.1039/d1qi00322d] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The in situ one-pot electrophilic fluorination of phosphanes with NFSI followed by anion exchange with MeOTf gives highly electrophilic fluorophosphonium triflates – highly efficient catalysts for the synthesis of N-sulfonylamidines from amides.
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Affiliation(s)
- Chun-Xiang Guo
- Faculty of Chemistry and Food Chemistry
- TU Dresden
- Chair of Inorganic Molecular Chemistry
- 01062 Dresden
- Germany
| | - Sivathmeehan Yogendra
- Faculty of Chemistry and Food Chemistry
- TU Dresden
- Chair of Inorganic Molecular Chemistry
- 01062 Dresden
- Germany
| | - Rosa M. Gomila
- Department of Chemistry
- Universitat de Illes Balears
- 07122 Palma de Mallorca
- Spain
| | - Antonio Frontera
- Department of Chemistry
- Universitat de Illes Balears
- 07122 Palma de Mallorca
- Spain
| | - Felix Hennersdorf
- Faculty of Chemistry and Food Chemistry
- TU Dresden
- Chair of Inorganic Molecular Chemistry
- 01062 Dresden
- Germany
| | - Johannes Steup
- Faculty of Chemistry and Food Chemistry
- TU Dresden
- Chair of Inorganic Molecular Chemistry
- 01062 Dresden
- Germany
| | - Kai Schwedtmann
- Faculty of Chemistry and Food Chemistry
- TU Dresden
- Chair of Inorganic Molecular Chemistry
- 01062 Dresden
- Germany
| | - Jan J. Weigand
- Faculty of Chemistry and Food Chemistry
- TU Dresden
- Chair of Inorganic Molecular Chemistry
- 01062 Dresden
- Germany
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4
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Azizi S, Shadjou N. Iron oxide (Fe 3O 4) magnetic nanoparticles supported on wrinkled fibrous nanosilica (WFNS) functionalized by biimidazole ionic liquid as an effective and reusable heterogeneous magnetic nanocatalyst for the efficient synthesis of N-sulfonylamidines. Heliyon 2021; 7:e05915. [PMID: 33553722 PMCID: PMC7848647 DOI: 10.1016/j.heliyon.2021.e05915] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 10/03/2020] [Accepted: 01/05/2021] [Indexed: 11/23/2022] Open
Abstract
Wrinkled fibrous nanosilica (WFNS) which functionalized by ionic liquid modified Fe3O4 NPs and CuI salts has been synthesized and characterized with FE-SEM, TEM, FT-IR, FAAS, EDX, and, XRD, VSM, and BET-BJH analysis. This new and effective magnetic ceramic nanocatalyst has been applied towards rapid synthesis of N-sulfonylamidines using reaction of phenyl acetylene, substituted sulfonyl azide and various amines under solvent-free conditions in very short reaction time. Higher catalytic activity CuI/Fe3O4NPs@IL-DFNS in the reaction is because of special structure of DFNS and existence of ionic liquids on its pores which act as a robust anchors to the loaded various nano-particles. So, this lead to no leaching of them from the pore of the composite. Shorter reaction time, higher yield, recovery of the catalyst using an external magnet and its reusability for 8 series without noteworthy reduction in its activity are the advantages of newly synthetic catalyst toward efficient synthesis of N-sulfonylamidines.
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Affiliation(s)
- Sajjad Azizi
- Pharmaceutical Analysis Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Nasrin Shadjou
- Department of Nanotechnology, Faculty of Science and Chemistry, Urmia University, Urmia, Iran
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5
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Gou Q, Liu Z, Cao T, Tan X, Shi W, Ran M, Cheng F, Qin J. Copper-Catalyzed Coupling of Sulfonamides with Alkylamines: Synthesis of ( E)- N-Sulfonylformamidines. J Org Chem 2020; 85:2092-2102. [PMID: 31876415 DOI: 10.1021/acs.joc.9b02860] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Herein, we describe an efficient copper-catalyzed coupling of sulfonamides with alkylamines to synthesize (E)-N-sulfonylformamidines. The reaction is accomplished under mild conditions without the use of a corrosive acid or base as an additive. It tolerates a broad scope of substrates and generates the products with exclusive (E)-stereoselectivity.
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Affiliation(s)
- Quan Gou
- School of Chemistry and Chemical Engineering , Yangtze Normal University , Chongqing 408100 , China
| | - Zining Liu
- Center for Yunnan-Guizhou Plateau Chemical Functional Materials and Pollution Control , Qujing Normal University , Qujing 655011 , China
| | - Tuanwu Cao
- School of Chemistry and Chemical Engineering , Yangtze Normal University , Chongqing 408100 , China
| | - Xiaoping Tan
- School of Chemistry and Chemical Engineering , Yangtze Normal University , Chongqing 408100 , China
| | - Wenbing Shi
- School of Chemistry and Chemical Engineering , Yangtze Normal University , Chongqing 408100 , China
| | - Man Ran
- School of Chemistry and Chemical Engineering , Yangtze Normal University , Chongqing 408100 , China
| | - Feixiang Cheng
- Center for Yunnan-Guizhou Plateau Chemical Functional Materials and Pollution Control , Qujing Normal University , Qujing 655011 , China
| | - Jun Qin
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology , Yunnan University , Kunming 650091 , China
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6
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Xuan-Wu Y, Wusiman A. Facile synthesis of novel Mono- and Bis- N-sulfamoylamidines. PHOSPHORUS SULFUR 2020. [DOI: 10.1080/10426507.2019.1653870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Ye Xuan-Wu
- School of Chemistry and Chemical Engineering, Xinjiang Normal University , Urumqi , People’s Republic of China
| | - Abudureheman Wusiman
- School of Chemistry and Chemical Engineering, Xinjiang Normal University , Urumqi , People’s Republic of China
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7
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Chen R, Chen J, Zhang J, Wan X. Combination of Tetrabutylammonium Iodide (TBAI) withtert-Butyl Hydroperoxide (TBHP): An Efficient Transition-Metal-Free System to Construct Various Chemical Bonds. CHEM REC 2018. [DOI: 10.1002/tcr.201700069] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Rongxiang Chen
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 P. R. China. Fax: (+86) 512-6588-0334
| | - Jijun Chen
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 P. R. China. Fax: (+86) 512-6588-0334
| | - Jie Zhang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 P. R. China. Fax: (+86) 512-6588-0334
| | - Xiaobing Wan
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 P. R. China. Fax: (+86) 512-6588-0334
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8
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Wusiman A, Hudabaierdi R. Efficient synthesis of N-oxysulfonyl formamidines through thionyl chloride-promoted reaction of sulfamates with formamides. SYNTHETIC COMMUN 2017. [DOI: 10.1080/00397911.2017.1361999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Abudureheman Wusiman
- School of Chemistry and Chemical Engineering, Xinjiang Normal University, Urumqi, People’s Republic of China
| | - Ruzeahong Hudabaierdi
- School of Chemistry and Chemical Engineering, Xinjiang Normal University, Urumqi, People’s Republic of China
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9
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Trillo P, Slagbrand T, Tinnis F, Adolfsson H. Mild Reductive Functionalization of Amides into N-Sulfonylformamidines. ChemistryOpen 2017; 6:484-487. [PMID: 28794940 PMCID: PMC5542752 DOI: 10.1002/open.201700087] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Indexed: 01/12/2023] Open
Abstract
The development of a protocol for the reductive functionalization of amides into N‐sulfonylformamidines is reported. The one‐pot procedure is based on a mild catalytic reduction of tertiary amides into the corresponding enamines by the use of Mo(CO)6 (molybdenum hexacarbonyl) and TMDS (1,1,3,3‐tetramethyldisiloxane). The formed enamines were allowed to react with sulfonyl azides to give the target compounds in moderate to good yields.
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Affiliation(s)
- Paz Trillo
- Department of Organic Chemistry Stockholm University 106 91 Stockholm Sweden
| | - Tove Slagbrand
- Department of Organic Chemistry Stockholm University 106 91 Stockholm Sweden
| | - Fredrik Tinnis
- Department of Organic Chemistry Stockholm University 106 91 Stockholm Sweden
| | - Hans Adolfsson
- Department of Organic Chemistry Stockholm University 106 91 Stockholm Sweden.,Department of Chemistry Umeå University 901 87 Umeå Sweden
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10
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Zhou L, Li X, Liu W, Zhao Y, Chen J. Cu(II)-catalyzed decarboxylation/elimination of N-arylsulfonyl amino acids to primary aryl sulfonamides. SYNTHETIC COMMUN 2016. [DOI: 10.1080/00397911.2016.1202981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Liandi Zhou
- Department of Chemistry, Jiangxi Normal University, Nanchang, China
| | - Xiaokang Li
- Department of Chemistry, Jiangxi Normal University, Nanchang, China
- Key Laboratory of Organo-pharmaceutical Chemistry, Gannan Normal University, Ganzhou, Jiangxi, China
| | - Wei Liu
- Department of Chemistry, Jiangxi Normal University, Nanchang, China
| | - Yongli Zhao
- Department of Chemistry, Jiangxi Normal University, Nanchang, China
| | - Junmin Chen
- Department of Chemistry, Jiangxi Normal University, Nanchang, China
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11
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Novel sulfonamide bearing coumarin scaffolds as selective inhibitors of tumor associated carbonic anhydrase isoforms IX and XII. Bioorg Med Chem 2016; 24:2882-2886. [DOI: 10.1016/j.bmc.2016.04.052] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Accepted: 04/25/2016] [Indexed: 11/22/2022]
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12
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Hornum M, Djukina A, Sassnau AK, Nielsen P. Synthesis of new C-5-triazolyl-functionalized thymidine analogs and their ability to engage in aromatic stacking in DNA : DNA and DNA : RNA duplexes. Org Biomol Chem 2016; 14:4436-47. [DOI: 10.1039/c6ob00609d] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Stacking interactions of substituted triazoles in the major groove were studied, and with a polar uracil, increased duplex stabilities were found.
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Affiliation(s)
- Mick Hornum
- Nucleic Acid Center
- Department of Physics
- Chemistry & Pharmacy
- University of Southern Denmark
- DK-5230 Odense
| | - Alevtina Djukina
- Nucleic Acid Center
- Department of Physics
- Chemistry & Pharmacy
- University of Southern Denmark
- DK-5230 Odense
| | - Ann-Katrin Sassnau
- Nucleic Acid Center
- Department of Physics
- Chemistry & Pharmacy
- University of Southern Denmark
- DK-5230 Odense
| | - Poul Nielsen
- Nucleic Acid Center
- Department of Physics
- Chemistry & Pharmacy
- University of Southern Denmark
- DK-5230 Odense
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13
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Ghasemi Z, Shojaei S, Shahrisa A. Copper iodide nanoparticles supported on magnetic aminomethylpyridine functionalized cellulose: a new heterogeneous and recyclable nanomagnetic catalyst for facile access to N-sulfonylamidines under solvent free conditions. RSC Adv 2016. [DOI: 10.1039/c6ra13251k] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A highly active catalyst based on CuI nanoparticles supported on magnetic aminomethylpyridine functionalized cellulose has been synthesized. It well catalyzes the multicomponent synthesis of N-sulfonylamidines under solvent free conditions.
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Affiliation(s)
- Zarrin Ghasemi
- Department of Organic and Biochemistry
- Faculty of Chemistry
- University of Tabriz
- Tabriz 5166614766
- Iran
| | - Salman Shojaei
- Department of Organic and Biochemistry
- Faculty of Chemistry
- University of Tabriz
- Tabriz 5166614766
- Iran
| | - Aziz Shahrisa
- Department of Organic and Biochemistry
- Faculty of Chemistry
- University of Tabriz
- Tabriz 5166614766
- Iran
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14
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Saftić D, Vianello R, Žinić B. 5-Triazolyluracils and TheirN1-Sulfonyl Derivatives: Intriguing Reactivity Differences in the Sulfonation of TriazoleN1′-Substituted andN1′-Unsubstituted Uracil Molecules. European J Org Chem 2015. [DOI: 10.1002/ejoc.201501088] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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15
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Hornum M, Kumar P, Podsiadly P, Nielsen P. Increasing the Stability of DNA:RNA Duplexes by Introducing Stacking Phenyl-Substituted Pyrazole, Furan, and Triazole Moieties in the Major Groove. J Org Chem 2015; 80:9592-602. [PMID: 26334359 DOI: 10.1021/acs.joc.5b01577] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Consecutive incorporations of our previously published thymidine analogue, 5-(1-phenyl-1H-1,2,3-triazol-4-yl)-2'-deoxyuridine monomer W in oligonucleotides, has demonstrated significant duplex-stabilizing properties due to its efficient staking properties in the major groove of DNA:RNA duplexes. The corresponding 2'-deoxycytidine analogue is not as well-accommodated in duplexes, however, due to its clear preference for the ring-flipped coplanar conformation. In our present work, we have used ab initio calculations to design two new building blocks, 5-(5-phenylfuran-2-yl)-2'-deoxycytidine monomer Y and 5-(1-phenyl-1H-pyrazol-3-yl)-2'-deoxycytidine monomer Z, that emulate the conformation of W. These monomers were synthesized by Suzuki-Miyaura couplings, and the pyrazole moiety was obtained in a cycloaddition from N-phenylsydnone. We show that the novel analogues Y and Z engage in efficient stacking either with themselves or with W due to a better overlap of the aromatic moieties. Importantly, we demonstrate that this translates into very thermally stable DNA:RNA duplexes, thus making Y and especially Z good candidates for improving the binding affinities of oligonucleotide-based therapeutics. Since we now have both efficiently stacking T and C analogues in hand, any purine rich stretch can be effectively targeted using these simple analogues. Notably, we show that the introduction of the aromatic rings in the major groove does not significantly change the helical geometry.
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Affiliation(s)
- Mick Hornum
- Nucleic Acid Center, Department of Physics, Chemistry & Pharmacy, University of Southern Denmark , Campusvej 55, DK-5230 Odense, Denmark
| | - Pawan Kumar
- Nucleic Acid Center, Department of Physics, Chemistry & Pharmacy, University of Southern Denmark , Campusvej 55, DK-5230 Odense, Denmark
| | - Patricia Podsiadly
- Nucleic Acid Center, Department of Physics, Chemistry & Pharmacy, University of Southern Denmark , Campusvej 55, DK-5230 Odense, Denmark
| | - Poul Nielsen
- Nucleic Acid Center, Department of Physics, Chemistry & Pharmacy, University of Southern Denmark , Campusvej 55, DK-5230 Odense, Denmark
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16
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Kumar P, Hornum M, Nielsen LJ, Enderlin G, Andersen NK, Len C, Hervé G, Sartori G, Nielsen P. High-affinity RNA targeting by oligonucleotides displaying aromatic stacking and amino groups in the major groove. Comparison of triazoles and phenyl substituents. J Org Chem 2014; 79:2854-63. [PMID: 24611639 DOI: 10.1021/jo4025896] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Three 5-modified 2'-deoxyuridine nucleosides were synthesized and incorporated into oligonucleotides and compared with the previously published 5-(1-phenyl-1,2,3-triazol-4-yl)-2'-deoxyuridine monomer W. The introduction of an aminomethyl group on the phenyl group led to monomer X, which was found to thermally stabilize a 9-mer DNA:RNA duplex, presumably through the partial neutralization of the negative charge of the backbone. By also taking advantage of the stacking interactions in the major groove of two or more of the monomer X, an extremely high thermal stability was obtained. A regioisomer of the phenyltriazole substituent, that is the 5-(4-phenyl-1,2,3-triazol-1-yl)-2'-deoxyuridine monomer Y, was found to destabilize the DNA:RNA duplex significantly, but stacking in the major groove compensated for this when two to four monomers were incorporated consecutively. Finally, the 5-phenyl-2'-deoxyuridine monomer Z was incorporated for comparison, and it was found to give a more neutral influence on duplex stability indicating less efficient stacking interactions. The duplexes were investigated by CD spectroscopy and MD simulations.
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Affiliation(s)
- Pawan Kumar
- Nucleic Acid Center, Department of Physics, Chemistry and Pharmacy, University of Southern Denmark , 5230 Odense M, Denmark
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17
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Uemura M, Yoshikawa Y, Yoshikawa K, Sato T, Mino Y, Chikuma M, Komeda S. Second- and higher-order structural changes of DNA induced by antitumor-active tetrazolato-bridged dinuclear platinum(II) complexes with different types of 5-substituent. J Inorg Biochem 2013; 127:169-74. [DOI: 10.1016/j.jinorgbio.2013.05.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2012] [Revised: 05/02/2013] [Accepted: 05/02/2013] [Indexed: 10/26/2022]
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18
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Gazvoda M, Kočevar M, Polanc S. In Situ Formation of Vilsmeier Reagents Mediated by Oxalyl Chloride: a Tool for the Selective Synthesis ofN-Sulfonylformamidines. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300402] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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19
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Kaura M, Kumar P, Hrdlicka PJ. Synthesis and hybridization properties of oligonucleotides modified with 5-(1-aryl-1,2,3-triazol-4-yl)-2'-deoxyuridines. Org Biomol Chem 2013; 10:8575-8. [PMID: 23042241 DOI: 10.1039/c2ob26717a] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Oligonucleotides modified with consecutive incorporations of 5-(1-aryl-1,2,3-triazol-4-yl)-2'-deoxyuridine monomers display strong thermal affinity and binding specificity toward RNA targets, due to formation of chromophore arrays in the major groove.
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Affiliation(s)
- Mamta Kaura
- Department of Chemistry, University of Idaho, PO Box 442343, Moscow, ID 83844-2343, USA
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20
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Kumar P, Shaikh KI, Jørgensen AS, Kumar S, Nielsen P. Three pyrene-modified nucleotides: synthesis and effects in secondary nucleic acid structures. J Org Chem 2012; 77:9562-73. [PMID: 23039223 DOI: 10.1021/jo301571s] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Synthesis of three pyrene-modified nucleosides was accomplished using the CuAAC reaction. Hereby, pyrene is attached either to the 5'-position of thymidine or to the 2'-position of 2'-deoxyuridine through triazolemethylene linkers, or to the 2'-position of 2'-deoxyuridine through a more rigid triazole linker. The three nucleosides were incorporated into oligonucleotides, and these were combined in different duplexes and other secondary structures, which were analyzed by thermal stability and fluorescence studies. The three monomers were found to have different impacts on the nucleic acid complexes. Hence, pyrene attached to the 5'-position shows a tendency for intercalation into the duplex as indicated by a general decrease in fluorescence intensity followed by an increase in duplex thermal stability. Pyrene attached to the 2'-position through a rigid triazole linker also shows a tendency for intercalation but with decrease in duplex stability, whereas the pyrene attached to the 2'-position through a triazolemethylene linker is primarily situated in the minor groove as indicated by an increase in fluorescence but here in most cases leading to increase in duplex stability. All three pyrene nucleotides lead to thermal stabilization of bulged duplexes and three-way junctions. In some cases when two pyrenes were introduced into the core of these complexes, the formation or disappearance of a fluorescence excimer band can be used to indicate the hybridization process. Hereby these oligonucleotides can act as specific recognition probes.
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Affiliation(s)
- Pawan Kumar
- Nucleic Acid Center, Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, 5230 Odense M, Denmark
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21
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Plażuk D, Rychlik B, Błauż A, Domagała S. Synthesis, electrochemistry and anticancer activity of novel ferrocenyl phenols prepared via azide-alkyne 1,3-cycloaddition reaction. J Organomet Chem 2012. [DOI: 10.1016/j.jorganchem.2012.05.042] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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22
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Kumar P, Chandak N, Nielsen P, Sharma PK. Sulfonamide bearing oligonucleotides: simple synthesis and efficient RNA recognition. Bioorg Med Chem 2012; 20:3843-9. [PMID: 22579616 DOI: 10.1016/j.bmc.2012.04.036] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2012] [Revised: 04/14/2012] [Accepted: 04/16/2012] [Indexed: 11/29/2022]
Abstract
Four pyrimidine nucleosides wherein a benzensulfonamide group is linked to the C-5 position of the uracil nucleobase through a triazolyl or an alkynyl linker were prepared by Cu(I)-assisted azide-alkyne cycloadditions (CuAAC) or Sonogashira reactions, respectively, and incorporated into oligonucleotides. Efficient π-π-stacking between two or more phenyltriazoles in the major groove was found to increase the thermal stability of a DNA:RNA duplex significantly. On the other hand, the alkynyl group was not as efficient in stacking as the triazolyl group. No effect of positional orientation of the sulfonamide group on the stacking efficiency was observed, and the most stable DNA:RNA duplex contained four consecutive sulfonamide substituted phenyltriazole moieties in the major groove.
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Affiliation(s)
- Pawan Kumar
- Department of Chemistry, Kurukshetra University, Kurukshetra 136 119, India
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Loakes D. Nucleotides and nucleic acids; oligo- and polynucleotides. ORGANOPHOSPHORUS CHEMISTRY 2012. [DOI: 10.1039/9781849734875-00169] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- David Loakes
- Medical Research Council Laboratory of Molecular Biology, Hills Road Cambridge CB2 2QH UK
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Chen S, Xu Y, Wan X. Direct condensation of sulfonamide and formamide: NaI-catalyzed synthesis of N-sulfonyl formamidine using TBHP as oxidant. Org Lett 2011; 13:6152-5. [PMID: 22039964 DOI: 10.1021/ol2024604] [Citation(s) in RCA: 88] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
A new N-sulfonyl formamidine synthesis was developed via NaI-catalyzed direct condensation of sulfonamide and formamide. The green methodology is featured by high atom economy, easily available starting materials, the lack of need for a transition-metal catalyst, no requirement of hazardous reagent, operational simplicity, and good tolerance with diverse functional groups. Mechanistic studies suggest that the protocol proceeds based upon in situ generated TsN·NaI.
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Affiliation(s)
- Shulin Chen
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
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25
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Freeman C, Ni Cheallaigh A, Heaney F. Conjugation at the oligonucleotide level based on isoxazole phosphoramidites generated by click chemistry. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.06.096] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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26
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Andersen NK, Døssing H, Jensen F, Vester B, Nielsen P. Duplex and triplex formation of mixed pyrimidine oligonucleotides with stacking of phenyl-triazole moieties in the major groove. J Org Chem 2011; 76:6177-87. [PMID: 21692520 DOI: 10.1021/jo200919y] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
5-(1-Phenyl-1,2,3-triazol-4-yl)-2'-deoxycytidine was synthesized from a modified CuAAC protocol and incorporated into mixed pyrimidine oligonucleotide sequences together with the corresponding 5-(1-phenyl-1,2,3-triazol-4-yl)-2'-deoxyuridine. With consecutive incorporations of the two modified nucleosides, improved duplex formation with a complementary RNA and improved triplex formation with a complementary DNA duplex were observed. The improvement is due to π-π stacking of the phenyl-triazole moieties in the major groove. The strongest stacking and most pronounced positive influence on thermal stability was found in between the uridine analogues or with the cytidine analogue placed in the 3' direction to the uridine analogue. Modeling indicated a different orientation of the phenyl-triazole moieties in the major groove to account for the difference between the two nucleotides. The modified oligonucleotides were all found to be significantly stabilized toward nucleolytic degration.
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Affiliation(s)
- Nicolai Krog Andersen
- Nucleic Acid Center, Department of Physics and Chemistry, University of Southern Denmark, 5230 Odense M, Denmark
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Katsoulis IA, Kythreoti G, Papakyriakou A, Koltsida K, Anastasopoulou P, Stathakis CI, Mavridis I, Cottin T, Saridakis E, Vourloumis D. Synthesis of 5,6-Spiroethers and Evaluation of their Affinities for the Bacterial A Site. Chembiochem 2011; 12:1188-92. [DOI: 10.1002/cbic.201100076] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2011] [Indexed: 11/06/2022]
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Yamada T, Peng CG, Matsuda S, Addepalli H, Jayaprakash KN, Alam MR, Mills K, Maier MA, Charisse K, Sekine M, Manoharan M, Rajeev KG. Versatile site-specific conjugation of small molecules to siRNA using click chemistry. J Org Chem 2011; 76:1198-211. [PMID: 21299239 DOI: 10.1021/jo101761g] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
We have previously demonstrated that conjugation of small molecule ligands to small interfering RNAs (siRNAs) and anti-microRNAs results in functional siRNAs and antagomirs in vivo. Here we report on the development of an efficient chemical strategy to make oligoribonucleotide-ligand conjugates using the copper-catalyzed azide-alkyne cycloaddition (CuAAC) or click reaction. Three click reaction approaches were evaluated for their feasibility and suitability for high-throughput synthesis: the CuAAC reaction at the monomer level prior to oligonucleotide synthesis, the solution-phase postsynthetic "click conjugation", and the "click conjugation" on an immobilized and completely protected alkyne-oligonucleotide scaffold. Nucleosides bearing 5'-alkyne moieties were used for conjugation to the 5'-end of the oligonucleotide. Previously described 2'- and 3'-O-propargylated nucleosides were prepared to introduce the alkyne moiety to the 3' and 5' termini and to the internal positions of the scaffold. Azido-functionalized ligands bearing lipophilic long chain alkyls, cholesterol, oligoamine, and carbohydrate were utilized to study the effect of physicochemical characteristics of the incoming azide on click conjugation to the alkyne-oligonucleotide scaffold in solution and on immobilized solid support. We found that microwave-assisted click conjugation of azido-functionalized ligands to a fully protected solid-support bound alkyne-oligonucleotide prior to deprotection was the most efficient "click conjugation" strategy for site-specific, high-throughput oligonucleotide conjugate synthesis tested. The siRNA conjugates synthesized using this approach effectively silenced expression of a luciferase gene in a stably transformed HeLa cell line.
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Affiliation(s)
- Takeshi Yamada
- Drug Discovery, Alnylam Pharmaceuticals, Cambridge, Massachusetts 02142, USA
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Jørgensen AS, Shaikh KI, Enderlin G, Ivarsen E, Kumar S, Nielsen P. The synthesis of double-headed nucleosides by the CuAAC reaction and their effect in secondary nucleic acid structures. Org Biomol Chem 2011; 9:1381-8. [DOI: 10.1039/c0ob00438c] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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