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Robins MJ, Nowak I, Wnuk SF, Hansske F, Madej D. Deoxygenative [1,2]-hydride shift rearrangements in nucleoside and sugar chemistry: analogy with the [1,2]-electron shift in the deoxygenation of ribonucleotides by ribonucleotide reductases. J Org Chem 2007; 72:8216-21. [PMID: 17918996 DOI: 10.1021/jo071102b] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A variant of the semipinacol rearrangement that was observed in our laboratory has been applied to the synthesis of several furanose and pyranose derivatives. The process consists of an "orchestrated" [1,2]-hydride shift with departure of a leaving group from the opposite face. Transient formation of a C=O group is followed by rapid transfer of a hydride-equivalent from the same face from which the leaving group departed, which results in double inversion of stereochemistry at the two vicinal carbon atoms. Treatment of 2'-O- and 3'-O-tosyladenosine with lithium triethylborohydride in DMSO/THF gave the respective 2'- and 3'-deoxynucleoside analogues with beta-D-threo configurations. Identical treatment of 5'-O-TPS-2'-O-tosyladenosine gave 9-(5-O-TPS-2-deoxy-beta-D-threo-pentofuranosyl)adenine. The same [1,2]-hydride shift and stereochemistry with the 5'-OH and 5'-O-TPS compounds demonstrated the absence of remote hydroxyl-group participation. Application of this process to other nucleoside 2'-O-tosyl derivatives gave the 2'-deoxy-threo compounds in good yields. The reaction-rate order was OTs approximately Br >> Cl for 2'-O-tosyladenosine, 2'-bromo-2'-deoxyadenosine, and 2'-chloro-2'-deoxyadenosine (all with beta-d-ribo configurations). Analogous results were obtained with mannopyranoside derivatives with either 4,6-O-benzylidene protection or a free OH group at C4. Deuterium labeling clearly defined the stereochemical course as a cis-vicinal [1,2]-hydride shift on the face opposite to the original cis OH and OTs groups followed by hydride transfer from the face opposite to the [1,2]-hydride shift. Synthetic and mechanistic considerations are discussed.
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Affiliation(s)
- Morris J Robins
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602-5700, USA.
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Patching SG, Baldwin SA, Baldwin AD, Young JD, Gallagher MP, Henderson PJF, Herbert RB. The nucleoside transport proteins, NupC and NupG, from Escherichia coli: specific structural motifs necessary for the binding of ligands. Org Biomol Chem 2005; 3:462-70. [PMID: 15678184 DOI: 10.1039/b414739a] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of 46 natural nucleosides and analogues (mainly adenosine-based) were tested as inhibitors of [U-(14)C]uridine uptake by the concentrative, H(+)-linked nucleoside transport proteins NupC and NupG from Escherichia coli. The two evolutionarily unrelated transporters showed similar but distinct patterns of inhibition, revealing differing selectivities for the different nucleosides and their analogues. Binding of nucleosides to NupG required the presence of hydroxyl groups at each of the C-3' and C-5' positions of ribose, while binding to NupC required only the C-3' hydroxyl substituent. The greater importance of the ribose moiety for binding to NupG is consistent with the evolutionary relationship between this protein and the oligosaccharide: H(+) symporter (OHS) subfamily of the major facilitator superfamily (MFS) of transporters. For both proteins the natural alpha-configuration at C-3' and the natural beta-configuration at C-1' was mandatory for ligand binding. N-7 in the imidazole ring of adenosine and the amino group at C-6 were found not to be important for binding and both transporters showed flexibility for substitution at C-6/N(6); one or both of N-1 and N-3 were important for adenosine analogue binding to NupC but significantly less so for binding to NupG. From the different effects of 8-bromoadenosine on the two transporters it appears that adenosine selectively binds to NupC in an anti- rather than a syn-conformation, whereas NupG is less prescriptive. The pattern of inhibition of NupC by differing nucleoside analogues confirmed the functional relationship of the bacterial transporter to members of the human concentrative nucleoside transporter (CNT) family and reaffirmed the use of the bacterial protein as an experimental model for these physiologically and clinically important mammalian proteins. The specificity data for NupG have been used to develop a homology model of the protein's binding site, based on the X-ray crystallographic structure of the disaccharide transporter LacY from E. coli. We have also developed an efficient general protocol for the synthesis of adenosine and three of its analogues, which is illustrated by the synthesis of [1'-(13)C]adenosine.
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Affiliation(s)
- Simon G Patching
- Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds LS2 9JT, UK
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Aman S, Anderson DJ, Connolly TJ, Crittall AJ, Ji G. From Adenosine to 3‘-Deoxyadenosine: Development and Scale Up. Org Process Res Dev 2000. [DOI: 10.1021/op000209x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sayed Aman
- Raylo Chemicals Inc., A Laporte Fine Chemicals Company, 8045 Argyll Road, Edmonton, Alberta, T6C 4A9 Canada
| | - D. Jason Anderson
- Raylo Chemicals Inc., A Laporte Fine Chemicals Company, 8045 Argyll Road, Edmonton, Alberta, T6C 4A9 Canada
| | - Terrence J. Connolly
- Raylo Chemicals Inc., A Laporte Fine Chemicals Company, 8045 Argyll Road, Edmonton, Alberta, T6C 4A9 Canada
| | - Andrew J. Crittall
- Raylo Chemicals Inc., A Laporte Fine Chemicals Company, 8045 Argyll Road, Edmonton, Alberta, T6C 4A9 Canada
| | - Guijun Ji
- Raylo Chemicals Inc., A Laporte Fine Chemicals Company, 8045 Argyll Road, Edmonton, Alberta, T6C 4A9 Canada
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Girardet JL, Townsend LB. Synthesis of β-l-Lyxofuranosyl Benzimidazoles by an Unexpected Intramolecular Displacement Reaction. J Org Chem 1999. [DOI: 10.1021/jo981733t] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jean-Luc Girardet
- Department of Chemistry, College of Literature, Science and the Arts, and the Department of Medicinal Chemistry, College of Pharmacy, University of Michigan, Ann Arbor, Michigan 48109
| | - Leroy B. Townsend
- Department of Chemistry, College of Literature, Science and the Arts, and the Department of Medicinal Chemistry, College of Pharmacy, University of Michigan, Ann Arbor, Michigan 48109
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Boudou V, Gosselin G, Imbach JL. A New and Convenient Approach for the Synthesis of Ribo- and 2′-Deoxyribo-β-L-Furanonucleosides Starting From β-L-Xylofuranonucleosides. ACTA ACUST UNITED AC 1999. [DOI: 10.1080/15257779908041512] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Robins MJ, Lewandowska E, Wnuk SF. Nucleic Acid Related Compounds. 105. Synthesis of 2',3'-Didehydro-2',3'-dideoxynucleosides from Ribonucleoside Cyclic 2',3'-(Sulfates or Phosphates) or 2',3'-Dimesylates via Reductive Elimination with Sodium Naphthalenide(1). J Org Chem 1998; 63:7375-7381. [PMID: 11672386 DOI: 10.1021/jo981013m] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Treatment of purine ribonucleosides with thionyl fluoride resulted in formation of cyclic 2',3'-sulfite esters. Acetylation of the 5'-hydroxy group and Sharpless oxidation (NaIO(4)/RuCl(3)) gave the cyclic 2',3'-sulfate ester derivatives. Treatment of 5'-O-silyl-protected ribonucleosides with thionyl chloride followed by oxidation gave an alternative route to the cyclic 2',3'-sulfates. Reductive elimination with sodium naphthalenide (THF/-50 degrees C) gave the 2',3'-unsaturated nucleosides. Parallel treatment of adenosine cyclic 2',3'-phosphate gave the 2',3'-olefin. The adenine, hypoxanthine, and 2-amino-6-methoxypurine 2',3'-didehydro-2',3'-dideoxynucleosides were prepared efficiently (40-60% overall yields of crystalline, analytically pure products; 3-5 steps, some combined into one-flask procedures) by treatment of 5'-O-protected 2',3'-di-O-mesylribonucleosides with sodium naphthalenide. Reactions were performed at or below ambient temperature with readily available reagents and standard laboratory conditions.
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Affiliation(s)
- Morris J. Robins
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602-5700
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Lewandowska E, Neschadimenko V, Wnuk SF, Robins MJ. Efficient removal of sugar O-tosyl groups and heterocycle halogens from purine nucleosides with sodium naphthalenide. Tetrahedron 1997. [DOI: 10.1016/s0040-4020(97)00313-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Moriguchi T, Wada T, Sekine M. New Nucleoside−Sugar Conjugates: 6-N-Glycosyloxyphosphorylated Adenosine Derivatives as Partial Structures of Agrocin 84. J Org Chem 1996. [DOI: 10.1021/jo961489a] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tomohisa Moriguchi
- Department of Life Science, Tokyo Institute of Technology, Nagatsuta, Midoriku, Yokohama 226, Japan
| | - Takeshi Wada
- Department of Life Science, Tokyo Institute of Technology, Nagatsuta, Midoriku, Yokohama 226, Japan
| | - Mitsuo Sekine
- Department of Life Science, Tokyo Institute of Technology, Nagatsuta, Midoriku, Yokohama 226, Japan
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Ceulemans G, Vandendriessche F, Rozenski J, Herdewijn P. Synthesis of an Uncharged cAMP-Analogue. ACTA ACUST UNITED AC 1995. [DOI: 10.1080/15257779508014657] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Kabalka GW, Guindi LH. Boron: Boranes in organic synthesis. Annual survey covering the year 1989. J Organomet Chem 1993. [DOI: 10.1016/0022-328x(93)80491-s] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Kawana M, Kuzuhara H. General method for the synthesis of 2′-azido-2′,3′-dideoxynucleosides by the use of [1,2]-hydride shift and β-elimination reactions. ACTA ACUST UNITED AC 1992. [DOI: 10.1039/p19920000469] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Génu-Dellac C, Gosselin G, Puech F, Henry JC, Aubertin AM, Obert G, Kirn A, Imbach JL. Systematic Synthesis and Antiviral Evaluation of α-L-Arabinofuranosyl and 2′-Deoxy-α-L-Erythro-Pento-Furanosyl Nucleosides of the Five Naturally Occurring Nucleic Acid Bases. ACTA ACUST UNITED AC 1991. [DOI: 10.1080/07328319108047067] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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