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Al Bujuq N. Strategies for introducing sulfur atom in a sugar ring: synthesis of 5-thioaldopyranoses and their NMR data. J Sulphur Chem 2019. [DOI: 10.1080/17415993.2019.1616734] [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)
- Nader Al Bujuq
- Chemistry Department, Faculty of Science, Taibah University, Medina, Kingdom of Saudi Arabia
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2
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Fan A, Chuah GK, Jaenicke S. A novel and environmental friendly synthetic route for hydroxypyrrolidines using zeolites. Carbohydr Res 2019; 472:103-114. [PMID: 30544044 DOI: 10.1016/j.carres.2018.11.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Revised: 11/28/2018] [Accepted: 11/28/2018] [Indexed: 10/27/2022]
Abstract
A critical step in the synthesis of the hydroxypyrrolidines, 1,4-dideoxy-1,4-imino-l-lyxitol and 1,4-dideoxy-1,4-imino-d-lyxitol, from the corresponding d-sugars is the synthesis of O-methyl 2,3-O-isopropylidenepentofuranoses. Instead of applying homogeneous catalysis process with conventional inorganic acid catalysts like HCl and HClO4, it was found that heterogeneous catalysis using zeolites could be used for the one-pot synthesis of O-methyl 2,3-O-isopropylidenepentofuranoses directly from d-sugars, MeOH and acetone at mild condition. The best catalyst was H-beta zeolite containing a Si/Al molar ratio of 150, where a yield of >83% was obtained. The overall yields of the five-step procedure to 1,4-dideoxy-1,4-imino-l-lyxitol and 1,4-dideoxy-1,4-imino-d-lyxitol were 57% and 50%, respectively. This synthetic procedure has several advantages such as competitive overall yield, reduced number of steps, and mild reaction conditions. Furthermore, the zeolite catalyst can be easily recovered from the reaction mixture and reused with no loss of activity.
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Affiliation(s)
- A Fan
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore.
| | - G K Chuah
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore
| | - Stephan Jaenicke
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore
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3
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Soengas RG, Silva AMS. Domino Reaction of Iodoglycosides: Synthesis of Carbohydrate-Based Nitroalkenes. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300362] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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4
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5
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6
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A fast, efficient and stereoselective synthesis of hydroxy-pyrrolidines. Carbohydr Res 2010; 345:1360-5. [DOI: 10.1016/j.carres.2010.03.016] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2010] [Revised: 03/10/2010] [Accepted: 03/13/2010] [Indexed: 10/19/2022]
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7
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Synthesis and chromatographic study of methyl-2,3-O-isopropylidene-5-dimethyl-arsinoyl-β-d-ribofuranoside and methyl-2,3-O-isopropylidene-5-deoxy-5-dimethyl-thioarsinoyl-β-d-ribofuranoside. Polyhedron 2008. [DOI: 10.1016/j.poly.2008.04.049] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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8
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Håkansson AE, Palmelund A, Holm H, Madsen R. Synthesis of 7-deoxypancratistatin from carbohydrates by the use of olefin metathesis. Chemistry 2007; 12:3243-53. [PMID: 16470562 DOI: 10.1002/chem.200501429] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The stereocontrolled synthesis of (+)-7-deoxypancratistatin is described. The convergent synthesis has been achieved by two different strategies, both of which commence from a pentose and piperonal. The latter is converted into allylic bromide 7, which is then coupled with a protected methyl 5-deoxy-5-iodo-D-ribofuranoside in the presence of zinc metal. The first strategy involves a total of only 13 steps from D-ribose and piperonal, but suffers from a low yield in the zinc-mediated reaction between ribofuranoside 9, benzylamine, and bromide 7. The second strategy involves a total of 18 steps from D-xylose and piperonal. The former is converted into ribofuranoside 28, which is coupled with bromide 7 in the presence of zinc, and this is followed by ring-closing olefin metathesis. Subsequent Overman rearrangement, dihydroxylation, and deprotection then affords the natural product.
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Affiliation(s)
- Anders E Håkansson
- Center for Sustainable and Green Chemistry, Department of Chemistry, Building 201, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
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9
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Ivanova NA, Valiullina ZR, Shitikova OV, Miftakhov MS. Reaction of methyl-4-methylene-2,3-O-isopropylidene-β-D-ribofuranoside with N-bromosuccinimide in aqueous tetrahydrofurane. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2007. [DOI: 10.1134/s1070428007050168] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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10
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Braga FG, Coimbra ES, de Oliveira Matos M, Lino Carmo AM, Cancio MD, da Silva AD. Synthesis and biological evaluation of some 6-substituted purines. Eur J Med Chem 2007; 42:530-7. [PMID: 17156894 DOI: 10.1016/j.ejmech.2006.10.014] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2006] [Revised: 10/22/2006] [Accepted: 10/26/2006] [Indexed: 10/23/2022]
Abstract
We report herein the synthesis and the in vitro antileishmanial evaluation of a series of 6-substituted purines. The most active compounds against Leishmania amazonensis promastigotes were 6-(3'-chloropropylthio)purine 2 [11,12] [corrected] 6-(3'-(thioethylamine)propylthio)purine 5, 6-(alpha-aceticacidthio)purine 7 and 6-(6'-deoxy-1'-O-methyl-beta-D-ribofuranose)purine 14 with an IC(50)=50, 50, 39 and 29 microM, respectively.
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Affiliation(s)
- Fernanda Gambogi Braga
- Departamento de Parasitologia, Microbiologia e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Juiz de Fora, Campus Universitario, Bairro Martelos, Juiz de Fora, Minas Gerais 36036-900, Brazil
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11
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Abstract
A short synthetic strategy for preparation of the conduritols is described. The key step employs a zinc-mediated fragmentation of protected methyl 5-deoxy-5-iodo-d-pentofuranosides followed by an allylation of the intermediate aldehyde in the same pot. The allylation is performed with 3-bromopropenyl benzoate and occurs with good diastereoselectivity. An amino group can be introduced in the product by trapping the intermediate aldehyde as the imine prior to the allylation. The functionalised 1,7-octadienes, thus obtained, are converted into protected conduritols by ring-closing olefin metathesis.
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Affiliation(s)
- Lise Keinicke
- Center for Sustainable and Green Chemistry, Department of Chemistry, Building 201, Technical University of Denmark, DK-2800, Lyngby, Denmark
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12
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Verhelst SHL, Paez Martinez B, Timmer MSM, Lodder G, van der Marel GA, Overkleeft HS, van Boom JH. A Short Route toward Chiral, Polyhydroxylated Indolizidines and Quinolizidines. J Org Chem 2003; 68:9598-603. [PMID: 14656083 DOI: 10.1021/jo0350662] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In this paper, a rapid route toward functionalized bicyclic alkaloids is presented. In only three steps, an easily accessible carbohydrate derivative was converted into iodomethyl indolizidine 13, which can equilibrate to the corresponding iodoquinolizidine 15. We provide strong evidence that this equilibration proceeds via an aziridinium ion intermediate. Furthermore, nucleophilic substitution of the iodomethyl indolizidine as well as the aziridinium intermediate gives access to highly functionalized indolizidine and quinolizidine alkaloids.
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Affiliation(s)
- Steven H L Verhelst
- Leiden Institute of Chemistry, Gorlaeus Laboratories, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
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13
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Fernandez-Bolaños JG, al-Masoudi NA, Maya I. Sugar derivatives having sulfur in the ring. Adv Carbohydr Chem Biochem 2002; 57:21-98. [PMID: 11836944 DOI: 10.1016/s0065-2318(01)57015-8] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- J G Fernandez-Bolaños
- Departamento de Química Orgánica, Facultad de Química, Universidad de Sevilla Apartado 553, E-41071 Seville, Spain
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14
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Poulsen CS, Madsen R. Carbohydrate carbocyclization by a zinc-mediated tandem reaction and ring-closing enyne metathesis. J Org Chem 2002; 67:4441-9. [PMID: 12076140 DOI: 10.1021/jo0200062] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Methyl 5-deoxy-5-iodo-pentofuranosides are reductively ring-opened and propargylated in a tandem fashion in the presence of zinc. The 1,7-enynes thus obtained are subjected to ring-closing enyne metathesis with catalyst B to produce functionalized 1-vinyl cyclohexenes. By adding BnNH(2) to the tandem reaction, an amino group can be introduced in the 1,7-enyne products. Addition of 2-TMS-ethynylcerium(III) chloride after the reductive ring-opening produces the corresponding 1,6-enynes. Further annulation of the product 1,3-dienes can be achieved through a Diels-Alder reaction with good control of stereochemistry. These procedures constitute efficient methods for rapid carbocyclization and annulation of carbohydrates to produce a variety of functionalized five- and six-membered ring systems.
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Affiliation(s)
- Carina Storm Poulsen
- Department of Chemistry, Building 201, Technical University of Denmark, DK-2800 Lyngby, Denmark
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15
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Bozó E, Boros S, Kuszmann J. Synthesis of 4-cyanophenyl and 4-nitrophenyl 1,5-dithio-D-ribopyranosides as well as their 2-deoxy and 2,3-dideoxy derivatives possessing antithrombotic activity. Carbohydr Res 1999; 321:52-66. [PMID: 10612002 DOI: 10.1016/s0008-6215(99)00175-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Abstract
1,2,3,4-Tetra-O-acetyl-5-thio-D-ribopyranose as well as its 1-bromide were used as donors in the reaction with 4-cyano- and 4-nitrobenzenethiol, to give the corresponding thioglycosides in different anomeric ratios depending on the reaction conditions. Zemplén deacetylation afforded 4-cyanophenyl as well as 4-nitrophenyl 1,5-dithio-alpha- and beta-D-ribopyranosides, respectively. 1,3,4-Tri-O-acetyl-2-deoxy-5-thio-D-erythro-pentopyranose was synthesized from methyl 2-deoxy-D-erythro-pentofuranoside and was coupled with 4-cyano- and 4-nitrobenzenethiol to give anomeric mixtures from which 4-cyanophenyl as well as 4-nitrophenyl 1,5-dithio-beta-D-erythro-pentopyranosides were isolated after deacetylation. 1,4-Di-O-acetyl-2,3-dideoxy-5-thio-D-glycero-pentopyranose was obtained starting from 1,2,5,6-di-O-isopropylidene-D-mannitol and used as the donor in the glycosylation reaction with 4-cyano- and 4-nitrobenzenethiol. The resulting anomeric mixtures were separated to give, after deacetylation, 4-cyanophenyl as well as 4-nitrophenyl 2,3-dideoxy-1,5-dithio-beta-D-glycero-pentopyranosides. All of these thioglycosides showed significant antithrombotic activity on rats after oral administration.
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Affiliation(s)
- E Bozó
- Institute for Drug Research, Budapest, Hungary
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16
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17
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Migawa MT, Girardet JL, Walker JA, Koszalka GW, Chamberlain SD, Drach JC, Townsend LB. Design, synthesis, and antiviral activity of alpha-nucleosides: D- and L-isomers of lyxofuranosyl- and (5-deoxylyxofuranosyl)benzimidazoles. J Med Chem 1998; 41:1242-51. [PMID: 9575044 DOI: 10.1021/jm970545c] [Citation(s) in RCA: 161] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Several 2-substituted alpha-D- and alpha-L-lyxofuranosyl and 5-deoxylyxofuranosyl derivatives of 5,6-dicholro-2-(isopropylamino)-1-(beta-L-ribofuranosyl) benzimidazole (1263W94) and 2,5,6-trichloro-1(beta-D-ribofuranosyl)benzimidazole (TCRB) were synthesized and evaluated for activity against two herpesviruses (HSV-1 and HCMV) and for their cytotoxicity against HFF and KB cells. Condensation of 1,2,3,5-tetra-O-acetyl-L-lyxofuranose (2a) with 2,5,6-trichlorobenzimidazole (1) yielded the alpha-nucleoside 3a. The 2-bromo derivative and 2-methylamino derivative were prepared by treatment of 3a with HBr followed by deprotection or from methylamine, respectively. Compound 3a was deprotected and the resultant nucleoside used to prepare the 2-cyclopropylamino and 2-isopropylamino derivatives. The 2-alkylthio nucleosides were prepared by condensing 2a with 5,6-dichlorobenzimidazole-2-thione followed by deprotection. Alkylation of this adduct gave the 2-methylthio and 2-benzylthio derivatives. Condensation of 5-deoxy-1,2,3-tri-O-acetyl-L-lyxofuranosyl, prepared from L-lyxose, with 1 or 2-bromo-5,6-dichlorobenzimidazole (15), followed by deprotection, gave the 2-chloro or 2-bromo-5'-deoxylyxo-furanosyl derivative, respectively. The cyclopropylamino derivative was prepared from the 2-chloro derivative. All D-isomers were prepared in an analogous fashion from D-lyxose. Either compounds were inactive against HSV-1 or weak activity was poorly separated from cytotoxicity. In contrast, the 2-halogen derivatives in both the alpha-lyxose and 5-deoxy-alpha-lyxose series were active against the Towne strain of HCMV. The 5-deoxy alpha-L analogues were the most active, IC50's = 0.2-0.4 microM, plaque assay; IC90's = 0.2-2 microM, yield reduction assay. All of the 2-isopropylamino or 2-cyclopropylamino derivatives were less active (IC50's = 60-100 microM, plaque assay; IC90's = 17-100 microM, yield reduction assay) and were not cytotoxic. The methylamino, thio, and methylthio derivatives were neither active nor cytotoxic. The benzylthio derivatives were weakly active, but this activity was poorly separated from cytotoxicity. The alpha-lyxose L-isomers were more active in a plaque assay against the AD169 strain of HCMV compared to the Towne strain, thereby providing additional evidence of antiviral specificity.
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Affiliation(s)
- M T Migawa
- Department of Chemistry, College of Literature, Science and Arts, University of Michigan, Ann Arbor, Michigan 48109-1065, USA
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18
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Dauban P, Dodd RH. 2,3-Aziridino-2,3-dideoxy-D-ribono-gamma-lactone 5-Phosphonate: Stereocontrolled Synthesis from D-Lyxose and Unusual Aziridine Ring Opening. J Org Chem 1997; 62:4277-4284. [PMID: 11671747 DOI: 10.1021/jo9623494] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The synthesis of (1R,4S,5S)-N-(benzyloxycarbonyl)-4-[(diethoxyphosphinyl)methyl]-3-oxa-6-azabicyclo[3.1.0]hexan-2-one (23), a new member of the 2,3-aziridino gamma-lactone family of compounds, was achieved in 15 steps from D-lyxose. Like all aziridino gamma-lactones known so far, 23 reacted with a soft nucleophile (ethanethiol) to give exclusively the product of aziridine ring opening at C-2 (24). On the other hand, hard nucleophiles (alcohols) did not react directly with the aziridine ring of 23 but appeared to promote intramolecular attack of the aziridine ring at C-3 by the C-5 phosphonate group, resulting, after hydrolytic workup, in formation of the 2-amino-3-hydroxy-D-ribono-1,4-lactone derivatives 25 and 26, instead of the expected 2-amino-3-alkoxy-D-xylono-1,4-lactone derivatives.
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Affiliation(s)
- Philippe Dauban
- Institut de Chimie des Substances Naturelles, CNRS, 91198 Gif-sur-Yvette Cedex, France
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19
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Hua Zhu B, Hua Liu Z, Yan H, Liu J, Chen H. The Coenzyme B12 analogs — ribosylcobalamins: Synthesis, characterization, and photolysis studies. J Inorg Biochem 1997. [DOI: 10.1016/s0162-0134(96)00077-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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20
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Liu J, O'Brien DH, Irgolic KJ. Synthesis of 1-O-R-5-deoxy-?-D-ribofuranosides with (CH3)2As and (CH3)2As?O as substituents at the 5-position and a methyl or 2?,3?-dihydroxypropyl group as the aglycone in the 1-position. Appl Organomet Chem 1996. [DOI: 10.1002/(sici)1099-0739(199602)10:1<1::aid-aoc466>3.0.co;2-a] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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21
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Synthesis and testing of substituted phenylthioribose analogs against Klebsiella pneumoniae. Bioorg Med Chem Lett 1993. [DOI: 10.1016/s0960-894x(01)81020-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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22
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Alkylcobalamins: Formation by enantioselective alkylation of cob(I)alamin, 1H NMR spectra, and conformational analysis of the alkyl group. J Organomet Chem 1992. [DOI: 10.1016/0022-328x(92)83446-o] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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23
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Trost BM, Nübling C. An asymmetric approach to 2-deoxynucleosides via organosulfur building blocks as chemical chameleons. Carbohydr Res 1990; 202:1-12. [PMID: 2224884 DOI: 10.1016/0008-6215(90)84067-5] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
An asymmetric synthesis of 6-N-benzoyl-5'-O-benzyl-2'-deoxyadenosine and its a anomer from non-carbohydrate building blocks is achieved in 7 steps. The sequence builds the basic structures using bis(methylthio)methane and methylthiomethyl phenyl sulfone as both nucleophilic and electrophilic building blocks, a feature that suggests their behavior as chemical chameleons. The asymmetric induction is achieved utilizing a kinetic resolution based upon catalytic asymmetric epoxidation.
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Affiliation(s)
- B M Trost
- Department of Chemistry, Stanford University, California 94305
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24
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Selective killing of Klebsiella pneumoniae by 5-trifluoromethylthioribose. Chemotherapeutic exploitation of the enzyme 5-methylthioribose kinase. J Biol Chem 1990. [DOI: 10.1016/s0021-9258(19)40124-5] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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25
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Sheid B, Lerner LM, Gaetjens E. Antiproliferative effects of 4',5'-unsaturated adenine nucleosides on leukemia L1210 cells in vitro. EXPERIENTIA 1989; 45:729-30. [PMID: 2759202 DOI: 10.1007/bf01974570] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Several 4',5'-unsaturated adenine nucleosides were shown to have antiproliferative activity against L1210 leukemia cells in vitro. The active nucleosides were cytotoxic to the L1210 cells as demonstrated by Trypan Blue uptake. The cytotoxicity was not induced by alterations in the ribonucleoside and deoxyribonucleoside triphosphate levels of the L1210 cells.
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Affiliation(s)
- B Sheid
- Department of Pharmacology, State University of New York, Brooklyn 11203
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26
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Fitchen JH, Riscoe MK, Ferro AJ. Exploitation of methylthioribose kinase in the development of antiprotozoal drugs. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 1988; 250:199-210. [PMID: 2855560 DOI: 10.1007/978-1-4684-5637-0_18] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- J H Fitchen
- Medical Research Service, Portland V.A. Medical Center, OR
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27
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Snyder JR, Serianni AS. Synthesis and n.m.r.-spectral analysis of unenriched and [1-13C]-enriched 5-deoxypentoses and 5-O-methylpentoses. Carbohydr Res 1987; 163:169-88. [PMID: 3621235 DOI: 10.1016/0008-6215(87)80180-5] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Chemical methods are described for preparing unenriched and [1-13C]-enriched 5-deoxy- and 5-O-methyl-pentoses in the D or L configuration. The 1H-n.m.r. spectra of these compounds have been interpreted, and the 13C-n.m.r. spectra assigned with the aid of 2-D 13C-1H chemical-shift correlation spectroscopy. Tautomeric forms (furanoses, hydrate, and aldehyde) in solution in 2H2O have been quantified with the aid of [1-13C]-enriched derivatives. Spectra of 5-deoxypentoses, 5-O-methylpentoses, and methyl pentofuranosides have been compared, in order to assess the effect of 5-C-deoxygenation and 5-O-methylation on chemical shifts and coupling constants (1H-1H, 13C-1H, and 13C-13C) and on the pentofuranose conformations.
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28
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Hughes NA, Munkombwe NM. Synthesis of 5-thio-d-arabinose and 5-thio-d-lyxose and their methyl glycopyranosides. Carbohydr Res 1985. [DOI: 10.1016/0008-6215(85)85213-7] [Citation(s) in RCA: 15] [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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29
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Klemer A, Bieber M, Wilbers H. Eine neue Methode zur Spaltung von Kohlenhydrat-triphenylmethyl- und -benzylethern. ACTA ACUST UNITED AC 1983. [DOI: 10.1002/jlac.198319830813] [Citation(s) in RCA: 31] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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30
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Takaku H, Nomoto T, Kimura K. SIMPLE SYNTHESIS OF 9-(5-DEOXY-β-D-ERYTHRO-PENT-4-ENOFURANOSYL)ADENINE FROM ADENOSINE BY SELENOXIDE FRAGMENTATION. CHEM LETT 1981. [DOI: 10.1246/cl.1981.1221] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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31
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Tronchet JMJ, Tronchet JF. Un nouvel exemple de nucl�oside � sucre ramifi� insatur�: la d�soxy-3?-m�thylid�ne-3?-ad�nosine. Helv Chim Acta 1981. [DOI: 10.1002/hlca.19810640207] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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32
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33
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Grant AJ, Lerner LM. Dialdehydes derived from adenine nucleosides as substrates and inhibitors of adenosine aminohydrolase. Biochemistry 1979; 18:2838-42. [PMID: 476055 DOI: 10.1021/bi00580a025] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A series of nucleoside dialdehydes have been obtained as powders after treatment of various adenine nucleosides with paraperiodic acid. Thus, oxidation gave dialdehydes derived from adenosine (1), 9-alpha-D-mannopyranosyladenine (2), 9-(5-deoxy-alpha-D-arabinofuranosyl)adenine (3), 9-alpha-L-rhamnopyranosyladenine (4), 9-beta-L-fucopyranosyladenine (5), 9-beta-D-fucopyranosyladenine (6), 9-alpha-D-arabinopyranosyladenine (7), 9-beta-D-ribopyranosyladenine (8), and 9-(5-deoxy-beta-D-erythro-pent-4-enofuranosyl)adenine (9). Nucleoside dialdehydes 1-3 and 6-8 were weak substrates for adenosine aminohydrolase from calf intestinal mucosa. Dialdehyde 8 had the strongest affinity, but 1 had the highest Vmax. All of the dialdehydes except 5 were inhibitors of the enzyme. The best inhibitors were 9 (Ki = 4 microM) and 4 (ki = 28 microM), and neither were substrates. The inhibitors did not exhibit time-dependent inhibition and did not appear to form covalent bonds with the protein. The data strongly suggest that the active form of the dialdehydes is as the open-chain dihydrates. The alcohol obtained by reduction of 9 (compound 10) was the strongest inhibitor (Ki = 0.9 microM among the related alcohols and the nucleoside dialdehydes.
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Grant AJ, Lerner LM. Unusual substrates for adenosine deaminase from calf intestinal mucosa. BIOCHIMICA ET BIOPHYSICA ACTA 1978; 525:472-6. [PMID: 687643 DOI: 10.1016/0005-2744(78)90244-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A number of adenine nucleosides with exocyclic double bonds either at the 4',5' position in pentofuranosyl nucleosides or at the 5',6' position of hexofuranosyl nucleosides have been found to act as substrates for adenosine deaminase (adenosine aminohydrolase, EC 3.5.4.4) from calf intestinal mucosa. Most of the results obtained are contrary to the accepted minimal structural requirements for substrate activity. These nucleosides had either incorrect anomeric configurations or no hydroxyl group at C-5' or C-3' in the proper configuration; some compounds incorporated both structural changes. There is a possiblity that the unsaturated group has a special role in binding to the enzyme.
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