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Li Y, Sun N, Zhang C, Hao M. Base‐Promoted
Formylation and
N
‐Difluoromethylation
of Azaindoles with Ethyl Bromodifluoroacetate as a Carbon Source. CHINESE J CHEM 2021. [DOI: 10.1002/cjoc.202100008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yang Li
- Xi'an Key Laboratory of Textile Chemical Engineering Auxiliaries, School of Environmental and Chemical Engineering, Xi'an Polytechnic University Xi'an Shaanxi 710048 China
| | - Ning Sun
- Xi'an Key Laboratory of Textile Chemical Engineering Auxiliaries, School of Environmental and Chemical Engineering, Xi'an Polytechnic University Xi'an Shaanxi 710048 China
| | - Cai‐Lin Zhang
- Xi'an Key Laboratory of Textile Chemical Engineering Auxiliaries, School of Environmental and Chemical Engineering, Xi'an Polytechnic University Xi'an Shaanxi 710048 China
| | - Meng Hao
- Xi'an Key Laboratory of Textile Chemical Engineering Auxiliaries, School of Environmental and Chemical Engineering, Xi'an Polytechnic University Xi'an Shaanxi 710048 China
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2
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Malquin N, Rahgoshay K, Lensen N, Chaume G, Miclet E, Brigaud T. CF 2H as a hydrogen bond donor group for the fine tuning of peptide bond geometry with difluoromethylated pseudoprolines. Chem Commun (Camb) 2019; 55:12487-12490. [PMID: 31566647 DOI: 10.1039/c9cc05771d] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
CF2H-Pseudoprolines obtained from difluoroacetaldehyde hemiacetal and serine are stable proline surrogates. The consequence of the incorporation of the CF2H group is an important decrease of the trans to cis amide bond isomerization energy and a remarkable stabilisation of the cis conformer by an hydrogen bond.
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Affiliation(s)
- N Malquin
- Laboratory of Chemical Biology (LCB, EA 4505), Université de Cergy-Pontoise, 5 Mail Gay-Lussac, 95000 Cergy-Pontoise, France.
| | - K Rahgoshay
- Laboratory of Chemical Biology (LCB, EA 4505), Université de Cergy-Pontoise, 5 Mail Gay-Lussac, 95000 Cergy-Pontoise, France.
| | - N Lensen
- Laboratory of Chemical Biology (LCB, EA 4505), Université de Cergy-Pontoise, 5 Mail Gay-Lussac, 95000 Cergy-Pontoise, France.
| | - G Chaume
- Laboratory of Chemical Biology (LCB, EA 4505), Université de Cergy-Pontoise, 5 Mail Gay-Lussac, 95000 Cergy-Pontoise, France.
| | - E Miclet
- Sorbonne Université, École Normale Supérieure, PSL University, CNRS, Laboratoire des Biomolécules, 75005 Paris, France
| | - T Brigaud
- Laboratory of Chemical Biology (LCB, EA 4505), Université de Cergy-Pontoise, 5 Mail Gay-Lussac, 95000 Cergy-Pontoise, France.
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3
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Moschner J, Stulberg V, Fernandes R, Huhmann S, Leppkes J, Koksch B. Approaches to Obtaining Fluorinated α-Amino Acids. Chem Rev 2019; 119:10718-10801. [PMID: 31436087 DOI: 10.1021/acs.chemrev.9b00024] [Citation(s) in RCA: 171] [Impact Index Per Article: 34.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Fluorine does not belong to the pool of chemical elements that nature uses to build organic matter. However, chemists have exploited the unique properties of fluorine and produced countless fluoro-organic compounds without which our everyday lives would be unimaginable. The incorporation of fluorine into amino acids established a completely new class of amino acids and their properties, and those of the biopolymers constructed from them are extremely interesting. Increasing interest in this class of amino acids caused the demand for robust and stereoselective synthetic protocols that enable straightforward access to these building blocks. Herein, we present a comprehensive account of the literature in this field going back to 1995. We place special emphasis on a particular fluorination strategy. The four main sections describe fluorinated versions of alkyl, cyclic, aromatic amino acids, and also nickel-complexes to access them. We progress by one carbon unit increments. Special cases of amino acids for which there is no natural counterpart are described at the end of each section. Synthetic access to each of the amino acids is summarized in form of a table at the end of this article with the aim to make the information easily accessible to the reader.
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Affiliation(s)
- Johann Moschner
- Department of Biology, Chemistry and Pharmacy, Institute of Chemistry and Biochemistry , Freie Universität Berlin , Takustr. 3 , 14195 Berlin , Germany
| | - Valentina Stulberg
- Department of Biology, Chemistry and Pharmacy, Institute of Chemistry and Biochemistry , Freie Universität Berlin , Takustr. 3 , 14195 Berlin , Germany
| | - Rita Fernandes
- Department of Biology, Chemistry and Pharmacy, Institute of Chemistry and Biochemistry , Freie Universität Berlin , Takustr. 3 , 14195 Berlin , Germany
| | - Susanne Huhmann
- Department of Biology, Chemistry and Pharmacy, Institute of Chemistry and Biochemistry , Freie Universität Berlin , Takustr. 3 , 14195 Berlin , Germany
| | - Jakob Leppkes
- Department of Biology, Chemistry and Pharmacy, Institute of Chemistry and Biochemistry , Freie Universität Berlin , Takustr. 3 , 14195 Berlin , Germany
| | - Beate Koksch
- Department of Biology, Chemistry and Pharmacy, Institute of Chemistry and Biochemistry , Freie Universität Berlin , Takustr. 3 , 14195 Berlin , Germany
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4
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García-Pérez D, López C, Claramunt RM, Alkorta I, Elguero J. 19F-NMR Diastereotopic Signals in Two N-CHF₂ Derivatives of (4S,7R)-7,8,8-Trimethyl-4,5,6,7-tetrahydro-4,7-methano-2H-indazole. Molecules 2017; 22:E2003. [PMID: 29149081 PMCID: PMC6150283 DOI: 10.3390/molecules22112003] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Revised: 11/14/2017] [Accepted: 11/16/2017] [Indexed: 11/17/2022] Open
Abstract
In this paper, we report the anisochrony of the fluorine atoms of a CHF₂ group when linked to a pyrazole ring. The pyrazole is part of (4S,7R)-7,8,8-trimethyl-4,5,6,7-tetrahydro-4,7-methano-2H-indazole also known as (4S,7R)-campho[2,3-c]pyrazole, which has two stereogenic centers. Gauge-Independent Atomic Orbital (GIAO)/Becke, 3-parameter, Lee-Yang-Parr (B3LYP)/6-311++G(d,f) calculated 19F chemical shifts of the minimum energy conformations satisfactorily agree with the experimental data. The energy differences between minima need to consider solvent effects (continuum model) to be satisfactorily reproduced.
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Affiliation(s)
- Diana García-Pérez
- Departamento de Química Orgánica y Bio-Orgánica, Facultad de Ciencias, UNED, Senda del Rey 9, E-28040 Madrid, Spain.
| | - Concepción López
- Departamento de Química Orgánica y Bio-Orgánica, Facultad de Ciencias, UNED, Senda del Rey 9, E-28040 Madrid, Spain.
| | - Rosa M Claramunt
- Departamento de Química Orgánica y Bio-Orgánica, Facultad de Ciencias, UNED, Senda del Rey 9, E-28040 Madrid, Spain.
| | - Ibon Alkorta
- Instituto de Química Médica, CSIC, Juan de la Cierva 3, E-28006 Madrid, Spain.
| | - José Elguero
- Instituto de Química Médica, CSIC, Juan de la Cierva 3, E-28006 Madrid, Spain.
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5
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Lin JS, Wang FL, Dong XY, He WW, Yuan Y, Chen S, Liu XY. Catalytic asymmetric radical aminoperfluoroalkylation and aminodifluoromethylation of alkenes to versatile enantioenriched-fluoroalkyl amines. Nat Commun 2017; 8:14841. [PMID: 28332576 PMCID: PMC5376653 DOI: 10.1038/ncomms14841] [Citation(s) in RCA: 117] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2016] [Accepted: 02/03/2017] [Indexed: 12/23/2022] Open
Abstract
Although great success has been achieved in asymmetric fluoroalkylation reactions via nucleophilic or electrophilic processes, the development of asymmetric radical versions of this type of reactions remains a formidable challenge because of the involvement of highly reactive radical species. Here we report a catalytic asymmetric radical aminoperfluoroalkylation and aminodifluoromethylation of alkenes with commercially available fluoroalkylsulfonyl chlorides as the radical sources, providing a versatile platform to access four types of enantioenriched α-tertiary pyrrolidines bearing β-perfluorobutanyl, trifluoromethyl, difluoroacetyl and even difluoromethyl groups in excellent yields and with excellent enantioselectivity. The key to success is not only the introduction of the CuBr/chiral phosphoric acid dual-catalytic system but also the use of silver carbonate to suppress strong background and side hydroamination reactions caused by a stoichiometric amount of the in situ generated HCl. Broad substrate scope, excellent functional group tolerance and versatile functionalization of the products make this approach very practical and attractive. Methods for the asymmetric introduction of organofluorine groups are often limited by the lack of variability in the starting materials. Here the authors report an asymmetric radical process for the introduction of fluoroalkyl groups using readily available fluoroalkylated sulfonyl chlorides.
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Affiliation(s)
- Jin-Shun Lin
- Department of Chemistry, South University of Science and Technology of China, Shenzhen 518055, China
| | - Fu-Li Wang
- Department of Chemistry, South University of Science and Technology of China, Shenzhen 518055, China
| | - Xiao-Yang Dong
- Department of Chemistry, South University of Science and Technology of China, Shenzhen 518055, China
| | - Wei-Wei He
- Department of Chemistry, South University of Science and Technology of China, Shenzhen 518055, China
| | - Yue Yuan
- Department of Chemistry, South University of Science and Technology of China, Shenzhen 518055, China
| | - Su Chen
- Department of Chemistry, South University of Science and Technology of China, Shenzhen 518055, China
| | - Xin-Yuan Liu
- Department of Chemistry, South University of Science and Technology of China, Shenzhen 518055, China
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6
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Alkorta I, Dardonville C, Elguero J. Observation of Diastereotopic Signals in 15N NMR Spectroscopy. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201412144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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7
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Alkorta I, Dardonville C, Elguero J. Observation of Diastereotopic Signals in15N NMR Spectroscopy. Angew Chem Int Ed Engl 2015; 54:3997-4000. [DOI: 10.1002/anie.201412144] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2014] [Indexed: 11/08/2022]
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8
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Magdesieva TV, Levitskiy OA, Grishin YK, Ambartsumyan AA, Kiskin MA, Churakov AV, Babievsky KK, Kochetkov KA. Electrochemically Deprotonated Chiral Nickel(II) Glycinate in Stereoselective Nucleophilic Addition to Michael Acceptors: Advantages and Limitations. Organometallics 2014. [DOI: 10.1021/om500070n] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tatiana V. Magdesieva
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1/3, Moscow 119991, Russia
| | - Oleg A. Levitskiy
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1/3, Moscow 119991, Russia
| | - Yuri K. Grishin
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1/3, Moscow 119991, Russia
| | - Asmik A. Ambartsumyan
- Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, Moscow, Russia
| | - Mikhail A. Kiskin
- Kurnakov Institute
of General and Inorganic
Chemistry, Russian Academy of Sciences, Leninsky Prosp. 31, 119991 Moscow, Russia
| | - Andrei V. Churakov
- Kurnakov Institute
of General and Inorganic
Chemistry, Russian Academy of Sciences, Leninsky Prosp. 31, 119991 Moscow, Russia
- Department of
Chemistry, Tomsk State University, Lenina prosp. 36, Tomsk 634050, Russia
| | - Konstantin K. Babievsky
- Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, Moscow, Russia
| | - Konstantin A. Kochetkov
- Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, Moscow, Russia
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9
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Aceña JL, Sorochinsky AE, Moriwaki H, Sato T, Soloshonok VA. Synthesis of fluorine-containing α-amino acids in enantiomerically pure form via homologation of Ni(II) complexes of glycine and alanine Schiff bases. J Fluor Chem 2013. [DOI: 10.1016/j.jfluchem.2013.06.004] [Citation(s) in RCA: 107] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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10
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Exploiting morph-DAST mediated ring-expansion of substituted cyclic β-amino alcohols for the preparation of cyclic fluorinated amino acids. Synthesis of 5-fluoromethylproline and 5-fluoropipecolic acid. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.02.082] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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11
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Nie J, Guo HC, Cahard D, Ma JA. Asymmetric construction of stereogenic carbon centers featuring a trifluoromethyl group from prochiral trifluoromethylated substrates. Chem Rev 2010; 111:455-529. [PMID: 21117644 DOI: 10.1021/cr100166a] [Citation(s) in RCA: 876] [Impact Index Per Article: 62.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jing Nie
- Department of Chemistry, Tianjin University, China
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12
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Ichikawa J. Synthetic Methods for Heterocycles and Carbocycles Bearing Fluorinated One-Carbon Units (=CF 2, CHF 2, or CF 3): Intramolecular Reaction of 2-Trifluoromethyl-1-alkenes. J SYN ORG CHEM JPN 2010. [DOI: 10.5059/yukigoseikyokaishi.68.1175] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Junji Ichikawa
- Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba
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13
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14
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Concise access to enantiopure (S)- and (R)-α-trifluoromethyl pyroglutamic acids from ethyl trifluoropyruvate-based chiral CF3-oxazolidines (Fox). J Fluor Chem 2008. [DOI: 10.1016/j.jfluchem.2008.07.019] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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15
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Ichikawa J, Iwai Y, Nadano R, Mori T, Ikeda M. A New Class of Substrates for Nucleophilic 5-endo-trig Cyclization, 2-Trifluoromethyl-1-alkenes: Synthesis of Five-Membered Hetero- and Carbocycles That Bear Fluorinated One-Carbon Units. Chem Asian J 2008; 3:393-406. [DOI: 10.1002/asia.200700324] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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16
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Chaume G, Van Severen MC, Marinkovic S, Brigaud T. Straightforward synthesis of (S)- and (R)-alpha-trifluoromethyl proline from chiral oxazolidines derived from ethyl trifluoropyruvate. Org Lett 2007; 8:6123-6. [PMID: 17165945 DOI: 10.1021/ol062593+] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[Structure: see text] A concise synthesis of both enantiomers of alpha-Tfm-proline and (S)-alpha-Tfm-prolinol from ethyl trifluoropyruvate is reported. The key step is a diastereoselective allylation reaction of ethyl trifluoropyruvate and (R)-phenylglycinol-based oxazolidines or imine. The lactone obtained by cyclization of the resulting hydroxy ester proved to be a valuable intermediate for the synthesis of (S)-alpha-Tfm-allylglycine and (S)-alpha-Tfm-norvaline in enantiopure form.
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Affiliation(s)
- Grégory Chaume
- Laboratoire Synthèse Organique Sélective et Chimie Organométallique (SOSCO), UMR CNRS 8123, Université de Cergy-Pontoise, 5, Mail Gay-Lussac-Neuville sur Oise 95031, Cergy-Pontoise Cedex, France
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17
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Ichikawa J, Nadano R, Ito N. 5-endo Heck-type cyclization of 2-(trifluoromethyl)allyl ketone oximes: synthesis of 4-difluoromethylene-substituted 1-pyrrolines. Chem Commun (Camb) 2006:4425-7. [PMID: 17057865 DOI: 10.1039/b610690k] [Citation(s) in RCA: 105] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
2-(Trifluoromethyl)allyl ketone O-pentafluorobenzoyloximes undergo a palladium-catalyzed 5-endo mode of alkene insertion via oxidative addition of the N-O bond, followed by beta-fluorine elimination to produce 4-difluoromethylene-1-pyrrolines.
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Affiliation(s)
- Junji Ichikawa
- Department of Chemistry, Graduate School of Science, The University of Tokyo, Bunkyo-ku, Tokyo, Japan.
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18
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Qiup XL, Qing FL. Synthesis of 2',3'-dideoxy-2'-monofluoromethyl azanucleosides. Bioorg Med Chem 2005; 13:277-83. [PMID: 15582471 DOI: 10.1016/j.bmc.2004.09.040] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2004] [Revised: 09/20/2004] [Accepted: 09/20/2004] [Indexed: 10/26/2022]
Abstract
(2S,4S)-Methyl-N-tert-butoxycarbonyl-4-monofluoromethylpyroglutamate 6 was synthesized via a key dehydrofluorination followed by hydrogenation. Compound 6 was converted to (5S,3S)-N-benzyloxycarbonyl-5-tert-butyldimethylsilyloxymethyl-3-monofluoromethyl-2-pyrrolidone 12 over four steps in 62% yield, which was used as a precursor for the synthesis of 2',3'-dideoxy-2'-monofluoromethyl azanucleosides 17-18.
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Affiliation(s)
- Xiao-Long Qiup
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Science, 354 Fenglin Lu, Shanghai 200032, China
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20
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Sharma NK, Ganesh KN. Expanding the repertoire of pyrrolidyl PNA analogues for DNA/RNA hybridization selectivity: aminoethylpyrrolidinone PNA (aepone-PNA). Chem Commun (Camb) 2004:2484-5. [PMID: 14587743 DOI: 10.1039/b307362a] [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: 11/21/2022]
Abstract
New PNA analogues derived from aminoethylpyrrolidin-5-one backbone show stabilization of aepone-PNA:DNA hybrids and destabilization of the corresponding RNA hybrids compared to unmodified PNA.
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Affiliation(s)
- Nagendra K Sharma
- Division of Organic Chemistry (Synthesis), National Chemical Laboratory, Pune 411008, India
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22
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Synthesis of 4-monofluoromethylenyl- and cis-4-monofluoromethyl-l-pyroglutamic acids via a novel dehydrofluorination. Tetrahedron 2004. [DOI: 10.1016/j.tet.2004.04.044] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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23
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Sharma NK, Ganesh KN. Regioselective oxidation of N -alkylpyrrolidines to pyrrolidin-5-ones by RuCl 3 /NaIO 4. Tetrahedron Lett 2004. [DOI: 10.1016/j.tetlet.2003.12.072] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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