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Rayala R, Giuglio-Tonolo A, Broggi J, Terme T, Vanelle P, Theard P, Médebielle M, Wnuk SF. Studies toward the oxidative and reductive activation of C-S bonds in 2'- S-aryl-2'-thiouridine derivatives. Tetrahedron 2016; 72:1969-1977. [PMID: 27019535 DOI: 10.1016/j.tet.2016.02.063] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Studies directed toward the oxidative and reductive desulfurization of readily available 2'-S-aryl-2'-thiouridine derivatives were investigated with the prospect to functionalize the C2'-position of nucleosides. The oxidative desulfurization-difluorination strategy was successful on 2-(arylthio)alkanoate surrogates, while extension of the combination of oxidants and fluoride sources was not an efficient fluorination protocol when applied to 2'-S-aryl-2'-thiouridine derivatives, resulting mainly in C5-halogenation of the pyrimidine ring and C2'-monofluorination without desulfurization. Cyclic voltammetry of 2'-arylsulfonyl-2'-deoxyuridines and their 2'-fluorinated analogues showed that cleavage of the arylsulfone moiety could occur, although at relatively high cathodic potentials. While reductive-desulfonylation of 2'-arylsulfonyl-2'-deoxyuridines with organic electron donors (OEDs) gave predominantly base-induced furan type products, chemical (OED) and electrochemical reductive-desulfonylation of the α-fluorosulfone derivatives yielded the 2'-deoxy-2'-fluorouridine and 2',3'-didehydro-2',3'-dideoxy-2'-fluorouridine derivatives. These results provided good evidence of the generation of a C2'-anion through carbon-sulfur bond cleavage, opening new horizons for the reductive-functionalization approaches in nucleosides.
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Affiliation(s)
- Ramanjaneyulu Rayala
- Department of Chemistry and Biochemistry, Florida International University, Miami, FL, USA
| | - Alain Giuglio-Tonolo
- Department of Chemistry and Biochemistry, Florida International University, Miami, FL, USA; Aix Marseille Université, CNRS, ICR UMR 7273, 13385, Marseille Cedex 05, France
| | - Julie Broggi
- Aix Marseille Université, CNRS, ICR UMR 7273, 13385, Marseille Cedex 05, France
| | - Thierry Terme
- Aix Marseille Université, CNRS, ICR UMR 7273, 13385, Marseille Cedex 05, France
| | - Patrice Vanelle
- Aix Marseille Université, CNRS, ICR UMR 7273, 13385, Marseille Cedex 05, France
| | - Patricia Theard
- Department of Chemistry and Biochemistry, Florida International University, Miami, FL, USA
| | - Maurice Médebielle
- Université de Lyon & Université Claude Bernard Lyon 1 (UCBL), Institut de Chimie et Biochimie Moléculaires et Supramoléculaires (ICBMS) UMR CNRS-UCBL-INSALyon 5246, 43 bd du 11 Novembre 1918, Villeurbanne, France
| | - Stanislaw F Wnuk
- Department of Chemistry and Biochemistry, Florida International University, Miami, FL, USA
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Iwabuchi Y, Ogasawara K, Fujimura T, Shibuya M. An Enantio- and Diastereocontrolled Synthesis of (+)-7-Deoxy-trans-dihydronarciclasine. HETEROCYCLES 2005. [DOI: 10.3987/com-05-s(k)68] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Ko H, Kim E, Park JE, Kim D, Kim S. Total Synthesis of Pancratistatin Relying on the [3,3]-Sigmatropic Rearrangement. J Org Chem 2003; 69:112-21. [PMID: 14703386 DOI: 10.1021/jo035371n] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A new total synthesis of the antitumor alkaloid, pancratistatin (1), has been accomplished from readily available starting materials. Claisen rearrangement of the racemic dihydropyranethylene 17 was employed to construct the A and C rings with the appropriate stereochemistry. In addition, the Ireland-Claisen rearrangement of the enantiomerically pure 9 followed by ring-closing metathesis provided the important intermediate 24, thus implying that our approach could yield the enantioselective synthesis of (+)-pancratistatin. With the appropriately functionalized cyclohexene 24, stereo- and regiocontrolled functional group interchanges, such as iodolactonization, dihydroxylations, and a cyclic sulfate elimination reaction, facilitated the production of the target natural product.
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Affiliation(s)
- Hyojin Ko
- Natural Products Research Institute, College of Pharmacy, Seoul National University, 28 Yungun, Jongro, Seoul 110-460, Korea
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Saito Y, Zevaco TA, Agrofoglio LA. Chemical synthesis of 13C labeled anti-HIV nucleosides as mass-internal standards. Tetrahedron 2002. [DOI: 10.1016/s0040-4020(02)01246-2] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Abstract
A new total synthesis of the antitumor alkaloids, pancratistatin (1), has been accomplished from readily available staring materials. The Claisen rearrangement of dihydropyranethylene 5 was employed to construct the A and C rings. Stereo- and regiocontrolled functional group interchange, such as iodolactonization, dihydroxylations, and a cyclic sulfate elimination reaction, allows for the production of the target natural product. [reaction: see text]
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Affiliation(s)
- Sanghee Kim
- Natural Products Research Institute, Seoul National University, 28 Yungun, Jongro, Seoul 110-460, Korea
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García-Granados A, Melguizo E, Parra A, Simeó Y, Viseras B, Dobado JA, Molina J, Arias JM. Regioselective enzymatic acylations of polyhydroxylated eudesmanes: semisynthesis, theoretical calculations, and biotransformation of cyclic sulfites. J Org Chem 2000; 65:8214-23. [PMID: 11101376 DOI: 10.1021/jo0008183] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Different lipase enzymes have been tested in order to perform regioselective acetylations on the eudesmane tetrol from vulgarin. High yields (95%) of 1,12-diacetoxy derivative (4) were achieved in 1 h with Candida antarctica lipase (CAL). However, only the 12-acetyl derivative (6) was obtained in similar yield with Mucor miehei (MML) or Candida cylindracea (CCL) lipases. The enzymatic protection at C-1 and C-12 has been used to form eudesmane cyclic-sulfites between C-6 and C-4 atoms. The R/S-sulfur configuration has been assigned by means of the experimental and theoretical (13)C and (1)H NMR chemical shifts. The theoretical shifts were calculated using the GIAO method, with a MM+ geometry optimization followed by a single-point calculation at the B3LYP/6-31G(*) level (B3LYP/6-31G(*)//MM+). Moreover, B3LYP/6-31G(*) geometry optimizations were carried out to test the B3LYP/6-31G(*)//MM+ results, for the deacetylated sulfites (12 and 15). In addition to the delta(C) and delta(H) shifts, the (3)J(HH) coupling constants were also calculated and compared with the experimental values when available. Finally, different reactivities have been checked in both sulfites by biotransformation with Rhizopus nigricans. While the R-sulfite gave 2 alpha- and 11 beta-hydroxylated metabolites, the S-sulfite yielded only regioselective deacetylations. Furthermore, both sulfites showed different reactivities in redox processes.
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Affiliation(s)
- A García-Granados
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Granada, 18071-Granada, Spain.
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Mathé C, Gosselin G. Synthesis and antiviral evaluation of the beta-L-enantiomers of some thymine 3'-deoxypentofuranonucleoside derivatives. NUCLEOSIDES, NUCLEOTIDES & NUCLEIC ACIDS 2000; 19:1517-30. [PMID: 11200256 DOI: 10.1080/15257770008045443] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
3'-Deoxy-beta-L-erythro- (3), 3'-deoxy-beta-L-threo- (6), 2'-fluoro- (7) and 2'-azido-2',3'-dideoxy-beta-L-erythro- (10) pentofuranonucleoside derivatives of thymine have been synthesized and their antiviral properties examined. All these derivatives were stereospecifically prepared by glycosylation of thymine with a suitable peracylated 3-deoxy-L-erythro-pentofuranose sugar (1), followed by appropriate chemical modifications. The prepared compounds were tested for their activity against HIV, but they did not show an antiviral effect.
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Affiliation(s)
- C Mathé
- Laboratoire de Chimie Organique Biomoléculaire de Synthèse, UMR 5625 CNRS-UM-II, Université Montpellier II, Sciences et Techniques du Languedoc, France
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Marchand A, Mathé C, Imbach JL, Gosselin G. Synthesis and antiviral evaluation of unnatural beta-L-enantiomers of 3'-fluoro- and 3'-azido-2',3'-dideoxyguanosine derivatives. NUCLEOSIDES, NUCLEOTIDES & NUCLEIC ACIDS 2000; 19:205-17. [PMID: 10772710 DOI: 10.1080/15257770008033004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
3'-fluoro-2',3'-dideoxy- (3) and 3'-azido-2',3'-dideoxy- (4) beta-L-ribofuranonucleoside derivatives of guanine have been synthesized and their antiviral properties examined. All these derivatives were regioselectively and stereospecifically prepared by glycosylation of 2-N-acetyl-6-O-(diphenylcarbamoyl)guanine 5 with a suitable peracylated L-xylo-furanose sugar 6, followed by appropriate chemical modifications. The prepared compounds were tested for their activity against HIV and HBV viruses, but they did not show significant activity.
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Affiliation(s)
- A Marchand
- Laboratoire de Chimie Organique Biomoléculaire de Synthèse, U.M.R. CNRS 5625, Université de Montpellier II, France
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