1
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Abstract
Pseudouridine (1) was synthesized by functional group interconversions of the Heck adduct11from 2,4-dimethoxy-5-iodopyrimidine (8) and ribofuranoid glycal4.
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Affiliation(s)
- Cheng-Ping Yu
- Department of Chemistry
- National Taiwan Normal University
- Taipei 11677
- Taiwan
| | - Hsin-Yun Chang
- Department of Chemistry
- National Taiwan Normal University
- Taipei 11677
- Taiwan
| | - Tun-Cheng Chien
- Department of Chemistry
- National Taiwan Normal University
- Taipei 11677
- Taiwan
- Faculty of Pharmacy
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2
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Cautain B, Castillo F, Musso L, Ferreira BI, de Pedro N, Rodriguez Quesada L, Machado S, Vicente F, Dallavalle S, Link W. Discovery of a Novel, Isothiazolonaphthoquinone-Based Small Molecule Activator of FOXO Nuclear-Cytoplasmic Shuttling. PLoS One 2016; 11:e0167491. [PMID: 27936162 PMCID: PMC5147912 DOI: 10.1371/journal.pone.0167491] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Accepted: 10/26/2016] [Indexed: 01/01/2023] Open
Abstract
FOXO factors are tumour suppressor proteins commonly inactivated in human tumours by posttranslational modifications. Furthermore, genetic variation within the FOXO3a gene is consistently associated with human longevity. Therefore, the pharmacological activation of FOXO proteins is considered as an attractive therapeutic approach to treat cancer and age-related diseases. In order to identify agents capable of activating FOXOs, we tested a collection of small chemical compounds using image-based high content screening technology. Here, we report the discovery of LOM612 (compound 1a), a newly synthesized isothiazolonaphthoquinone as a potent FOXO relocator. Compound 1a induces nuclear translocation of a FOXO3a reporter protein as well as endogenous FOXO3a and FOXO1 in U2OS cells in a dose-dependent manner. This activity does not affect the subcellular localization of other cellular proteins including NFkB or inhibit CRM1-mediated nuclear export. Furthermore, compound 1a shows a potent antiproliferative effect in human cancer cell lines.
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Affiliation(s)
- Bastien Cautain
- Fundacion MEDINA, Parque Tecnológico Ciencias de la Salud, Granada, Spain
| | - Francisco Castillo
- Fundacion MEDINA, Parque Tecnológico Ciencias de la Salud, Granada, Spain
| | - Loana Musso
- DeFENS Department of Food, Environmental and Nutritional Sciences, Università di Milano, Italy
| | - Bibiana I. Ferreira
- Centre for Biomedical Research (CBMR), Gambelas Campus, Faro, Portugal
- Regenerative Medicine Program, Department of Biomedical Sciences and Medicine, University of Algarve, Campus de Gambelas, Faro, Portugal
| | - Nuria de Pedro
- Fundacion MEDINA, Parque Tecnológico Ciencias de la Salud, Granada, Spain
| | | | - Susana Machado
- Centre for Biomedical Research (CBMR), Gambelas Campus, Faro, Portugal
| | - Francisca Vicente
- Fundacion MEDINA, Parque Tecnológico Ciencias de la Salud, Granada, Spain
| | - Sabrina Dallavalle
- DeFENS Department of Food, Environmental and Nutritional Sciences, Università di Milano, Italy
| | - Wolfgang Link
- Centre for Biomedical Research (CBMR), Gambelas Campus, Faro, Portugal
- Regenerative Medicine Program, Department of Biomedical Sciences and Medicine, University of Algarve, Campus de Gambelas, Faro, Portugal
- * E-mail:
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3
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Tomori T, Miyatake Y, Sato Y, Kanamori T, Masaki Y, Ohkubo A, Sekine M, Seio K. Synthesis of peptide nucleic acids containing pyridazine derivatives as cytosine and thymine analogs, and their duplexes with complementary oligodeoxynucleotides. Org Lett 2015; 17:1609-12. [PMID: 25753827 DOI: 10.1021/acs.orglett.5b00522] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Synthesis of peptide nucleic acids (PNAs) is reported with new pyridazine-type nucleobases: 3-aminopyridazine (aPz) and 1-aminophthalazine (aPh) as cytosine analogs, and pyridazin-3-one (Pz(O)) and phthalazin-1-one (Ph(O)) as thymine analogs. The PNAs having an aPz or a Pz(O) formed duplexes with each complementary oligodeoxynucleotide forming a base pair with G or A, respectively, as evaluated by using UV melting analyses and circular dichroism (CD) spectra.
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Affiliation(s)
- Takahito Tomori
- Department of Life Science, Tokyo Institute of Technology, 4259 Nagatsuta, Midoriku, Yokohama 226-8501, Japan
| | - Yuya Miyatake
- Department of Life Science, Tokyo Institute of Technology, 4259 Nagatsuta, Midoriku, Yokohama 226-8501, Japan
| | - Yuta Sato
- Department of Life Science, Tokyo Institute of Technology, 4259 Nagatsuta, Midoriku, Yokohama 226-8501, Japan
| | - Takashi Kanamori
- Department of Life Science, Tokyo Institute of Technology, 4259 Nagatsuta, Midoriku, Yokohama 226-8501, Japan
| | - Yoshiaki Masaki
- Department of Life Science, Tokyo Institute of Technology, 4259 Nagatsuta, Midoriku, Yokohama 226-8501, Japan
| | - Akihiro Ohkubo
- Department of Life Science, Tokyo Institute of Technology, 4259 Nagatsuta, Midoriku, Yokohama 226-8501, Japan
| | - Mitsuo Sekine
- Department of Life Science, Tokyo Institute of Technology, 4259 Nagatsuta, Midoriku, Yokohama 226-8501, Japan
| | - Kohji Seio
- Department of Life Science, Tokyo Institute of Technology, 4259 Nagatsuta, Midoriku, Yokohama 226-8501, Japan
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4
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Hatano A, Okada M, Dezaki K, Hirai S. Improved synthesis of mercapto C-nucleoside possessing p-phenyl thiol as base using a lithiated coupling reaction. Tetrahedron 2015. [DOI: 10.1016/j.tet.2014.12.085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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5
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Möschwitzer VD, Kariuki BM, Redman JE. Asymmetric synthesis of aminopyrimidine and cyclic guanidine amino acids. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.06.066] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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6
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Štambaský J, Kapras V, Štefko M, Kysilka O, Hocek M, Malkov AV, Kočovský P. A Modular Approach to Aryl-C-ribonucleosides via the Allylic Substitution and Ring-Closing Metathesis Sequence. A Stereocontrolled Synthesis of All Four α-/β- and d-/l-C-Nucleoside Stereoisomers. J Org Chem 2011; 76:7781-803. [DOI: 10.1021/jo201110z] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Jan Štambaský
- Department of Chemistry, WestChem, University of Glasgow, Glasgow G12 8QQ, Scotland, U.K
| | - Vojtěch Kapras
- Department of Chemistry, WestChem, University of Glasgow, Glasgow G12 8QQ, Scotland, U.K
| | - Martin Štefko
- Institute of Organic Chemistry and Biochemistry, Gilead Sciences & IOCB Research Center, Academy of Sciences of the Czech Republic, CZ-16610, Prague 6, Czech Republic
| | - Ondřej Kysilka
- Department of Chemistry, WestChem, University of Glasgow, Glasgow G12 8QQ, Scotland, U.K
| | - Michal Hocek
- Institute of Organic Chemistry and Biochemistry, Gilead Sciences & IOCB Research Center, Academy of Sciences of the Czech Republic, CZ-16610, Prague 6, Czech Republic
| | - Andrei V. Malkov
- Department of Chemistry, WestChem, University of Glasgow, Glasgow G12 8QQ, Scotland, U.K
| | - Pavel Kočovský
- Department of Chemistry, WestChem, University of Glasgow, Glasgow G12 8QQ, Scotland, U.K
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7
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Štefko M, Slavětínská L, Klepetářová B, Hocek M. General and Modular Synthesis of Isomeric 5-Substituted Pyridin-2-yl and 6-Substituted Pyridin-3-yl C-Ribonucleosides Bearing Diverse Alkyl, Aryl, Hetaryl, Amino, Carbamoyl, and Hydroxy Groups. J Org Chem 2011; 76:6619-35. [DOI: 10.1021/jo200949c] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Martin Štefko
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Gilead & IOCB Research Center, Flemingovo nám. 2, CZ-16610 Prague 6, Czech Republic
| | - Lenka Slavětínská
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Gilead & IOCB Research Center, Flemingovo nám. 2, CZ-16610 Prague 6, Czech Republic
| | - Blanka Klepetářová
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Gilead & IOCB Research Center, Flemingovo nám. 2, CZ-16610 Prague 6, Czech Republic
| | - Michal Hocek
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Gilead & IOCB Research Center, Flemingovo nám. 2, CZ-16610 Prague 6, Czech Republic
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8
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Thomson CG, Reilly J, Sandham DA. Synthesis of useful fragments in drug discovery: 2-Amino-5-tert-butylpyridine and its oxidised analogues. Bioorg Med Chem Lett 2011; 21:4281-3. [DOI: 10.1016/j.bmcl.2011.05.066] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2011] [Revised: 05/17/2011] [Accepted: 05/18/2011] [Indexed: 11/30/2022]
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9
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Bardagí JI, Rossi RA. Short Access to 6-Substituted Pyrimidine Derivatives by the SRN1 Mechanism. Synthesis of 6-Substituted Uracils through a One-Pot Procedure. J Org Chem 2010; 75:5271-7. [DOI: 10.1021/jo101064e] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Javier I. Bardagí
- INFIQC, Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, 5000 Córdoba, Argentina
| | - Roberto A. Rossi
- INFIQC, Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, 5000 Córdoba, Argentina
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10
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Stefko M, Slavetínská L, Klepetárová B, Hocek M. A general and efficient synthesis of pyridin-2-yl C-ribonucleosides bearing diverse alkyl, aryl, amino, and carbamoyl groups in position 6. J Org Chem 2010; 75:442-9. [PMID: 20000693 DOI: 10.1021/jo902313g] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
An efficient and practical methodology of preparation of 6-substituted pyridin-2-yl C-ribonucleosides was developed. A one-pot two-step addition of 2-lithio-6-bromopyridine to TBS-protected ribonolactone followed by acetylation gave 1beta-(6-bromopyridin-2-yl)-1-O-acetyl-2,3,5-tri-O-(tert-butyldimethylsilyl)-D-ribofuranose in high yield. Its reduction with Et(3)SiH and BF(3) x Et(2)O afforded the desired TBS-protected 6-bromopyridine C-ribonucleoside as pure beta-anomer in good overall yield of 63%. This intermediate was then subjected to a series of palladium catalyzed cross-coupling reactions, aminations and aminocarbonylations to give a series of protected 1beta-(6-alkyl-, 6-aryl-, 6-amino-, and 6-carbamoylpyridin-2-yl)-C-ribonucleosides. Deprotection of silylated nucleosides by Et(3)N x 3HF gave a series of title free C-ribonucleosides (12 examples).
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Affiliation(s)
- Martin Stefko
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Gilead & IOCB Research Center, Flemingovo nam. 2, CZ-16610 Prague 6, Czech Republic
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11
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Bardagí JI, Rossi RA. Advances in the Synthesis of 5- and 6-Substituted Uracil Derivatives. ORG PREP PROCED INT 2009. [DOI: 10.1080/00304940903378776] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Javier I. Bardagí
- a INFIQC, Departamento de Química Orgánica, Facultad de Ciencias Químicas , Universidad Nacional de Córdoba, Ciudad Universitaria , 5000 Córdoba, Argentina
| | - Roberto A. Rossi
- a INFIQC, Departamento de Química Orgánica, Facultad de Ciencias Químicas , Universidad Nacional de Córdoba, Ciudad Universitaria , 5000 Córdoba, Argentina
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12
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Lu J, Li NS, Koo SC, Piccirilli JA. Synthesis of Pyridine, Pyrimidine and Pyridinone C-Nucleoside Phosphoramidites for Probing Cytosine Function in RNA. J Org Chem 2009; 74:8021-30. [DOI: 10.1021/jo9016919] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jun Lu
- Howard Hughes Medical Institute, Department of Biochemistry and Molecular Biology and Department of Chemistry, University of Chicago, 929 East 57th Street, Chicago, Illinois 60637
| | - Nan-Sheng Li
- Howard Hughes Medical Institute, Department of Biochemistry and Molecular Biology and Department of Chemistry, University of Chicago, 929 East 57th Street, Chicago, Illinois 60637
| | - Selene C. Koo
- Howard Hughes Medical Institute, Department of Biochemistry and Molecular Biology and Department of Chemistry, University of Chicago, 929 East 57th Street, Chicago, Illinois 60637
| | - Joseph A. Piccirilli
- Howard Hughes Medical Institute, Department of Biochemistry and Molecular Biology and Department of Chemistry, University of Chicago, 929 East 57th Street, Chicago, Illinois 60637
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13
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Affiliation(s)
- Michal Hocek
- Department of Chemistry, WestChem, University of Glasgow, Glasgow G12 8QQ, United Kingdom, and Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Gilead & IOCB Research Center, CZ-16610 Prague 6, Czech Republic
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14
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15
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Swamy KCK, Kumar NNB, Balaraman E, Kumar KVPP. Mitsunobu and Related Reactions: Advances and Applications. Chem Rev 2009; 109:2551-651. [PMID: 19382806 DOI: 10.1021/cr800278z] [Citation(s) in RCA: 873] [Impact Index Per Article: 58.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- K. C. Kumara Swamy
- School of Chemistry, University of Hyderabad, Hyderabad − 500046, A. P., India
| | - N. N. Bhuvan Kumar
- School of Chemistry, University of Hyderabad, Hyderabad − 500046, A. P., India
| | - E. Balaraman
- School of Chemistry, University of Hyderabad, Hyderabad − 500046, A. P., India
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16
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17
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Bardagí JI, Rossi RA. A Novel Approach to the Synthesis of 6-Substituted Uracils in Three-Step, One-Pot Reactions. J Org Chem 2008; 73:4491-5. [DOI: 10.1021/jo800358v] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Javier I. Bardagí
- INFIQC, Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, 5000 Córdoba, Argentina
| | - Roberto A. Rossi
- INFIQC, Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, 5000 Córdoba, Argentina
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18
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A novel biomimetic condensation of 2-deoxyribose, aryl amine and acetyl acetone to bicyclic aminols catalyzed by InCl3. Tetrahedron Lett 2008. [DOI: 10.1016/j.tetlet.2008.02.080] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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19
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Bárta J, Pohl R, Klepetárová B, Ernsting NP, Hocek M. Modular synthesis of 5-substituted thiophen-2-yl C-2'-deoxyribonucleosides. J Org Chem 2008; 73:3798-806. [PMID: 18416574 DOI: 10.1021/jo800177y] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A new modular methodology of preparation of 5-substituted thiophene-2-yl C-nucleosides was developed. A Friedel-Crafts-type of C-glycosidation of 2-bromothiophene with toluoyl-protected methylglycoside 2 gave the desired protected 1beta-(5-bromothiophen-2-yl)-1,2-dideoxyribofuranose 4a in 60%. The key intermediate 4a was then subjected to a series of palladium-catalyzed cross-coupling reactions. The cross-coupling reactions with alkyl organometallics gave beta-(5-alkylthiophen-2-yl)-2-deoxyribonucleosides 4 and 7 in moderate yields accompanied by side-products of reduction. On the other hand, cross-couplings with arylstannanes proceeded smoothly to give a series of beta-(5-arylthiophen-2-yl)-2-deoxyribonucleosides 4 in good yields. Deprotection of toluoylated nucleosides by NaOMe in MeOH and silylated nucleosides by Et 3N.3HF gave a series of free C-nucleosides 6. Alternatively, other types of 5-arylthiophene C-nucleosides 6 were prepared in one step by the aqueous-phase cross-coupling reactions of unprotected 1beta-(5-bromothiophen-2-yl)-1,2-dideoxyribofuranose with boronic acids. Title 5-arylthiophene C-nucleosides 6 exhibit interesting fluorescent properties with emission maxima varying from 339 to 396 nm depending on the aryl group attached.
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Affiliation(s)
- Jan Bárta
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Gilead Sciences & IOCB Research Center, Prague 6, Czech Republic
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20
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Štefko M, Pohl R, Klepetářová B, Hocek M. A Modular Methodology for the Synthesis of 4- and 3-Substituted Benzene and Aniline C-Ribonucleosides. European J Org Chem 2008. [DOI: 10.1002/ejoc.200701168] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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21
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Krishna PR, Reddy VR, Srinivas R. A new synthetic route to oxazole and pyrrole 2-deoxy-C-ribosides. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.06.110] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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22
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Shin D, Switzer C. A metallo base-pair incorporating a terpyridyl-like motif: bipyridyl-pyrimidinone.Ag(I).4-pyridine. Chem Commun (Camb) 2007:4401-3. [PMID: 17957300 DOI: 10.1039/b709291a] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The design and characterization of a geometrically unique, metallo base-pair motif is reported.
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Affiliation(s)
- Dongwon Shin
- Department of Chemistry, University of California-Riverside, Riverside, CA 92521, USA
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23
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Joubert N, Pohl R, Klepetérová B, Hocek M. Modular and Practical Synthesis of 6-Substituted Pyridin-3-yl C-Nucleosides. J Org Chem 2007; 72:6797-805. [PMID: 17665955 DOI: 10.1021/jo0709504] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A novel modular and practical methodology for preparation of 6-substituted pyridin-3-yl C-nucleosides was developed. The Heck reaction of 2-chloro-5-iodopyridine with a 3'-TBDMS-protected glycal gave a 6-chloropyridin-3-yl nucleoside analogue, which was then desilylated, selectively reduced, and reprotected to give the TBDMS-protected 6-chloropyridin-3-yl C-2'-deoxyribonucleoside as a pure beta-anomer in a total yield of 39% over four steps. This key intermediate was then subjected to a series of palladium-catalyzed cross-coupling reactions, aminations, and alkoxylations to give a series of protected 1beta-(6-alkyl-, 6-aryl-, 6-hetaryl, 6-amino-, and 6-tert-butoxypyridin-3-yl)-2'-deoxyribonucleosides. 6-Unsubstituted pyridin-3-yl C-nucleoside was prepared by catalytic hydrogenation of the chloro derivative and 6-oxopyridine C-nucleoside by treatment of the 6-tert-butoxy derivative with TFA. Deprotection of all the silylated nucleosides by Et3N.3HF gave a series of free C-nucleosides (10 examples).
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Affiliation(s)
- Nicolas Joubert
- Gilead Sciences & IOCB Research Center, Institute of Organic Chemistry and Biochemistry, v.v.i., Academy of Sciences of the Czech Republic, CZ-16610, Prague 6, Czech Republic
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24
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A fluorescence-quencher pair for DNA hybridization studies based on hydrophobic base surrogates. Tetrahedron 2007. [DOI: 10.1016/j.tet.2006.12.095] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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25
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Urban M, Pohl R, Klepetarova B, Hocek M. New Modular and Efficient Approach to 6-Substituted Pyridin-2-yl C-Nucleosides. J Org Chem 2006; 71:7322-8. [PMID: 16958526 DOI: 10.1021/jo061080d] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A novel modular, efficient, and practical methodology of preparation of 6-substituted pyridin-2-yl C-nucleosides was developed. An addition of 2-lithio-6-bromopyridine 2b to TBDMS-protected 2-deoxyribonolactone 5 gave aduct 7 as an equilibrium mixture of anomeric hemiketals 1-(6-bromopyridin-2-yl)-1-hydroxynucleosides 7a,b and its open form 7c. Reduction of the adduct 7 with Et3SiH and BF3 x Et2O afforded the desired 6-bromonucleoside 8a as pure beta-anomer in a total yield of 32% over two steps from 5. Intermediate 8a was then subjected to a series of palladium catalyzed cross-coupling reactions and aminations to give a series of protected 1beta-(6-alkyl-, 6-aryl-, and 6-aminopyridin-2-yl)-2-deoxyribonucleosides 9. Catalytic hydrogenation of 8a gave an unsubstituted pyridine C-nucleoside, and diazotative oxodeamination of 6-aminopyridine nucleoside 9f by isopentyl nitrite in acetic acid gave 6-oxopyridine nucleoside 10i. Deprotection of silylated nucleosides 9 by Et3N.3HF gave a series of free C-nucleosides 10.
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Affiliation(s)
- Milan Urban
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, CZ-16610, Prague 6, Czech Republic
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26
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Boudet N, Knochel P. Chemo- and Regioselective Functionalization of Uracil Derivatives. Applications to the Synthesis of Oxypurinol and Emivirine. Org Lett 2006; 8:3737-40. [PMID: 16898805 DOI: 10.1021/ol061295+] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[reaction: see text] A novel route for the synthesis of 4,5-difunctionalized uracils using a chemo- and regioselective bromine/magnesium exchange reaction on 5-bromo-4-halogeno-2,6-dimethoxypyrimidines has been developed. Applications to the synthesis of pharmaceuticals such as oxypurinol and emivirine are reported.
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Affiliation(s)
- Nadège Boudet
- Department Chemie und Biochemie, Ludwig-Maximilians-Universität, Butenandtstrasse 5-13, 81377, München, Germany
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27
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Hanessian S, Marcotte S, Machaalani R, Huang G, Pierron J, Loiseleur O. Total synthesis of malayamycin A and analogues. Tetrahedron 2006. [DOI: 10.1016/j.tet.2005.12.066] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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