1
|
Kim GS, Jang JP, Oh TH, Kwon M, Lee B, Lee JS, Ko SK, Hong YS, Ahn JS, Jang JH. Angucyclines containing β-ᴅ-glucuronic acid from Streptomyces sp. KCB15JA151. Bioorg Med Chem Lett 2021; 48:128237. [PMID: 34216745 DOI: 10.1016/j.bmcl.2021.128237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 06/21/2021] [Accepted: 06/27/2021] [Indexed: 10/21/2022]
Abstract
Two angucyclines, pseudonocardones D (1) and E (2), were isolated from Streptomyces sp. KCB15JA151. The planar structure was elucidated by comprehensive spectroscopic analysis. The absolute configuration of the sugar unit was determined based on the basis of coupling constants, ROESY, chemical derivatization and HPLC analysis. The biological activities of compounds 1 and 2 were examined by performing a computational target prediction, which led to tests of the antiestrogenic activity. The result suggested that compound 1 might be an ERα antagonist.
Collapse
Affiliation(s)
- Gil Soo Kim
- Anticancer Agent Research Center, Korea Research Institute of Bioscience and Biotechnology, Cheongju 28116, Republic of Korea; Department of Biomolecular Science, KRIBB School of Bioscience, University of Science and Technology, Daejeon 34113, Republic of Korea
| | - Jun-Pil Jang
- Anticancer Agent Research Center, Korea Research Institute of Bioscience and Biotechnology, Cheongju 28116, Republic of Korea
| | - Tae Hoon Oh
- Anticancer Agent Research Center, Korea Research Institute of Bioscience and Biotechnology, Cheongju 28116, Republic of Korea; College of Pharmacy, Chungbuk National University, Cheongju 28160, Republic of Korea
| | - Mincheol Kwon
- Anticancer Agent Research Center, Korea Research Institute of Bioscience and Biotechnology, Cheongju 28116, Republic of Korea; Department of Biomolecular Science, KRIBB School of Bioscience, University of Science and Technology, Daejeon 34113, Republic of Korea
| | - Byeongsan Lee
- Anticancer Agent Research Center, Korea Research Institute of Bioscience and Biotechnology, Cheongju 28116, Republic of Korea; College of Pharmacy, Chungbuk National University, Cheongju 28160, Republic of Korea
| | - Jung-Sook Lee
- Korean Collection for Type Cultures, Korea Research Institute of Bioscience and Biotechnology, Jeongeup 56212, Republic of Korea
| | - Sung-Kyun Ko
- Anticancer Agent Research Center, Korea Research Institute of Bioscience and Biotechnology, Cheongju 28116, Republic of Korea
| | - Young-Soo Hong
- Anticancer Agent Research Center, Korea Research Institute of Bioscience and Biotechnology, Cheongju 28116, Republic of Korea; Department of Biomolecular Science, KRIBB School of Bioscience, University of Science and Technology, Daejeon 34113, Republic of Korea
| | - Jong Seog Ahn
- Anticancer Agent Research Center, Korea Research Institute of Bioscience and Biotechnology, Cheongju 28116, Republic of Korea; Department of Biomolecular Science, KRIBB School of Bioscience, University of Science and Technology, Daejeon 34113, Republic of Korea.
| | - Jae-Hyuk Jang
- Anticancer Agent Research Center, Korea Research Institute of Bioscience and Biotechnology, Cheongju 28116, Republic of Korea; Department of Biomolecular Science, KRIBB School of Bioscience, University of Science and Technology, Daejeon 34113, Republic of Korea.
| |
Collapse
|
2
|
Acharya PP, Khatri HR, Janda S, Zhu J. Synthesis and antitumor activities of aquayamycin and analogues of derhodinosylurdamycin A. Org Biomol Chem 2019; 17:2691-2704. [DOI: 10.1039/c9ob00121b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An analogue without the sugar moiety of natural derhodinosylurdamycin A is better.
Collapse
Affiliation(s)
- Padam P. Acharya
- Department of Chemistry and Biochemistry and School of Green Chemistry and Engineering
- The University of Toledo
- Toledo
- USA
| | - Hem Raj Khatri
- Department of Chemistry and Biochemistry and School of Green Chemistry and Engineering
- The University of Toledo
- Toledo
- USA
| | - Sandip Janda
- Department of Chemistry and Biochemistry and School of Green Chemistry and Engineering
- The University of Toledo
- Toledo
- USA
| | - Jianglong Zhu
- Department of Chemistry and Biochemistry and School of Green Chemistry and Engineering
- The University of Toledo
- Toledo
- USA
| |
Collapse
|
3
|
Darbem MP, Kanno KS, de Oliveira IM, Esteves CHA, Pimenta DC, Stefani HA. Synthesis of amidoglucals and glucal esters via carbonylative coupling reactions of 2-iodoglucal using Mo(CO)6 as a CO source. NEW J CHEM 2019. [DOI: 10.1039/c8nj04540b] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The synthesis of amidoglucals and glucal esters in good to high yields using 2-iodo-3,4,6-tri-O-acetyl-d-glucal as a substrate, Mo(CO)6 as a carbon monoxide source and PdCl2 as a catalyst is reported.
Collapse
Affiliation(s)
- Mariana P. Darbem
- Faculdade de Ciências Farmacêuticas
- Universidade de São Paulo
- São Paulo
- Brazil
| | - Karina S. Kanno
- Faculdade de Ciências Farmacêuticas
- Universidade de São Paulo
- São Paulo
- Brazil
| | | | | | | | - Hélio A. Stefani
- Faculdade de Ciências Farmacêuticas
- Universidade de São Paulo
- São Paulo
- Brazil
| |
Collapse
|
4
|
Acharya PP, Baryal KN, Reno CE, Zhu J. Synthesis of S-linked trisaccharide glycal of derhodinosylurdamycin A: Discovery of alkyl thiocyanate as an efficient electrophile for stereoselective sulfenylation of 2-deoxy glycosyl lithium. Carbohydr Res 2017. [DOI: 10.1016/j.carres.2017.06.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
5
|
Villadsen K, Martos-Maldonado MC, Jensen KJ, Thygesen MB. Chemoselective Reactions for the Synthesis of Glycoconjugates from Unprotected Carbohydrates. Chembiochem 2017; 18:574-612. [DOI: 10.1002/cbic.201600582] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Indexed: 12/27/2022]
Affiliation(s)
- Klaus Villadsen
- Department of Chemistry; University of Copenhagen; Faculty of Science; Thorvaldsensvej 40 1871 Frederiksberg C Denmark
| | - Manuel C. Martos-Maldonado
- Department of Chemistry; University of Copenhagen; Faculty of Science; Thorvaldsensvej 40 1871 Frederiksberg C Denmark
| | - Knud J. Jensen
- Department of Chemistry; University of Copenhagen; Faculty of Science; Thorvaldsensvej 40 1871 Frederiksberg C Denmark
| | - Mikkel B. Thygesen
- Department of Chemistry; University of Copenhagen; Faculty of Science; Thorvaldsensvej 40 1871 Frederiksberg C Denmark
| |
Collapse
|
6
|
Fernandes RA, Kattanguru P, Gholap SP, Chaudhari DA. Recent advances in the Overman rearrangement: synthesis of natural products and valuable compounds. Org Biomol Chem 2017; 15:2672-2710. [DOI: 10.1039/c6ob02625g] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
This review documents the reports since 2005 on the Overman rearrangement, an important C–N bond forming reaction that has been profoundly used in the synthesis of natural products, synthetic intermediates, building blocks and valuable compounds.
Collapse
Affiliation(s)
- Rodney A. Fernandes
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
| | - Pullaiah Kattanguru
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
| | - Sachin P. Gholap
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
| | - Dipali A. Chaudhari
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
| |
Collapse
|
7
|
Ruei JH, Venukumar P, Ingle AB, Mong KKT. C6 picoloyl protection: a remote stereodirecting group for 2-deoxy-β-glycoside formation. Chem Commun (Camb) 2016; 51:5394-7. [PMID: 25470411 DOI: 10.1039/c4cc08465a] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
We reported a remote control glycosylation method using the picoloyl protecting group for 2-deoxy-β-glycosidic bond formation. The method is applicable to various 2-deoxythioglycosyl donors and the utility is illustrated by the synthesis of a deoxytrisaccharide component of landomycins.
Collapse
Affiliation(s)
- Jyh-Herng Ruei
- Applied Chemistry Department, National Chiao Tung University (NCTU), 1001 Ta Hsueh Road, Taiwan.
| | | | | | | |
Collapse
|
8
|
Tatina MB, Hussain A, Dhas AK, Mukherjee D. Advances in C-alkynylation of sugars and its application in organic synthesis. RSC Adv 2016. [DOI: 10.1039/c6ra11672h] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
C-Glycosidation plays a significant role in the synthesis of optically active scaffolds.
Collapse
Affiliation(s)
- Madhu Babu Tatina
- Academy of Scientific and Innovative Research (AcSIR)
- New Delhi, India
- Indian Institute of Integrative Medicine (CSIR-IIIM)
- , India
| | - Altaf Hussain
- Academy of Scientific and Innovative Research (AcSIR)
- New Delhi, India
- Indian Institute of Integrative Medicine (CSIR-IIIM)
- , India
| | | | - Debaraj Mukherjee
- Academy of Scientific and Innovative Research (AcSIR)
- New Delhi, India
- Indian Institute of Integrative Medicine (CSIR-IIIM)
- , India
| |
Collapse
|
9
|
Khatri HR, Nguyen H, Dunaway JK, Zhu J. Total Synthesis of Antitumor Antibiotic Derhodinosylurdamycin A. Chemistry 2015; 21:13553-7. [DOI: 10.1002/chem.201502113] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Indexed: 11/08/2022]
|
10
|
Ansari AA, Reddy YS, Vankar YD. Efficient carbon-Ferrier rearrangement on glycals mediated by ceric ammonium nitrate: Application to the synthesis of 2-deoxy-2-amino-C-glycoside. Beilstein J Org Chem 2014; 10:300-6. [PMID: 24605151 PMCID: PMC3943741 DOI: 10.3762/bjoc.10.27] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2013] [Accepted: 01/09/2014] [Indexed: 11/23/2022] Open
Abstract
A carbon-Ferrier rearrangement on glycals has been performed by using ceric ammonium nitrate to obtain products in moderate to good yields with high selectivity. The versatility of this method has been demonstrated by applying it to differently protected glycals and by employing several nucleophiles. The obtained C-allyl glycoside has been utilized for the synthesis of a orthogonally protected 2-amino-2-deoxy-C-glycoside.
Collapse
Affiliation(s)
- Alafia A Ansari
- Department of Chemistry, Indian Institute of Technology Kanpur 208 016, India
| | - Y Suman Reddy
- Department of Chemistry, Indian Institute of Technology Kanpur 208 016, India
| | - Yashwant D Vankar
- Department of Chemistry, Indian Institute of Technology Kanpur 208 016, India
| |
Collapse
|
11
|
Ekholm FS, Ardá A, Eklund P, André S, Gabius HJ, Jiménez-Barbero J, Leino R. Studies related to Norway spruce galactoglucomannans: chemical synthesis, conformation analysis, NMR spectroscopic characterization, and molecular recognition of model compounds. Chemistry 2012; 18:14392-405. [PMID: 23008171 DOI: 10.1002/chem.201200510] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2012] [Revised: 05/16/2012] [Indexed: 12/20/2022]
Abstract
Galactoglucomannan (GGM) is a polysaccharide mainly consisting of mannose, glucose, and galactose. GGM is the most abundant hemicellulose in the Norway spruce (Picea abies), but is also found in the cell wall of flax seeds, tobacco plants, and kiwifruit. Although several applications for GGM polysaccharides have been developed in pulp and paper manufacturing and the food and medical industries, attempts to synthesize and study distinct fragments of this polysaccharide have not been reported previously. Herein, the synthesis of one of the core trisaccharide units of GGM together with a less-abundant tetrasaccharide fragment is described. In addition, detailed NMR spectroscopic characterization of the model compounds, comparison of the spectral data with natural GGM, investigation of the acetyl-group migration phenomena that takes place in the polysaccharide by using small model compounds, and a binding study between the tetrasaccharide model fragment and a galactose-binding protein (the toxin viscumin) are reported.
Collapse
Affiliation(s)
- Filip S Ekholm
- Laboratory of Organic Chemistry, Åbo Akademi University, Piispankatu 8, 20500 Åbo, Finland
| | | | | | | | | | | | | |
Collapse
|
12
|
Kharel MK, Rohr J. Delineation of gilvocarcin, jadomycin, and landomycin pathways through combinatorial biosynthetic enzymology. Curr Opin Chem Biol 2012; 16:150-61. [PMID: 22465094 DOI: 10.1016/j.cbpa.2012.03.007] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2012] [Revised: 03/08/2012] [Accepted: 03/09/2012] [Indexed: 11/30/2022]
Abstract
The exact sequence of events in biosyntheses of natural products is essential not only to understand and learn from nature's strategies and tricks to assemble complex natural products, but also for yield optimization of desired natural products, and for pathway engineering and muta-synthetic preparation of analogues of bioactive natural products. Biosyntheses of natural products were classically studied applying in vivo experiments, usually by combining incorporation experiments with stable-isotope labeled precursors with cross-feeding experiments of putative intermediates. Later genetic studies were dominant, which consist of gene cluster determination and analysis of gene inactivation experiments. From such studies various biosynthetic pathways were proposed, to a large extent just through in silico analyses of the biosynthetic gene clusters after DNA sequencing. Investigations of the complex biosyntheses of the angucycline group anticancer drugs landomycin, jadomycin and gilvocarcin revealed that in vivo and in silico studies were insufficient to delineate the true biosynthetic sequence of events. Neither was it possible to unambiguously assign enzyme activities, especially where multiple functional enzymes were involved. However, many of the intriguing ambiguities could be solved after in vitro reconstitution of major segments of these pathways, and subsequent systematic variations of the used enzyme mixtures. This method has been recently termed 'combinatorial biosynthetic enzymology'.
Collapse
Affiliation(s)
- Madan K Kharel
- Midway College School of Pharmacy, 120 Scott Perry Drive, Paintsville, KY 42240, USA
| | | |
Collapse
|
13
|
Kharel MK, Pahari P, Shepherd MD, Tibrewal N, Nybo SE, Shaaban KA, Rohr J. Angucyclines: Biosynthesis, mode-of-action, new natural products, and synthesis. Nat Prod Rep 2011; 29:264-325. [PMID: 22186970 DOI: 10.1039/c1np00068c] [Citation(s) in RCA: 250] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Covering: 1997 to 2010. The angucycline group is the largest group of type II PKS-engineered natural products, rich in biological activities and chemical scaffolds. This stimulated synthetic creativity and biosynthetic inquisitiveness. The synthetic studies used five different strategies, involving Diels-Alder reactions, nucleophilic additions, electrophilic additions, transition-metal mediated cross-couplings and intramolecular cyclizations to generate the angucycline frames. Biosynthetic studies were particularly intriguing when unusual framework rearrangements by post-PKS tailoring oxidoreductases occurred, or when unusual glycosylation reactions were involved in decorating the benz[a]anthracene-derived cores. This review follows our previous reviews, which were published in 1992 and 1997, and covers new angucycline group antibiotics published between 1997 and 2010. However, in contrast to the previous reviews, the main focus of this article is on new synthetic approaches and biosynthetic investigations, most of which were published between 1997 and 2010, but go beyond, e.g. for some biosyntheses all the way back to the 1980s, to provide the necessary context of information.
Collapse
Affiliation(s)
- Madan K Kharel
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, 789 S. Limestone Street, Lexington, Kentucky 40536-0596, USA
| | | | | | | | | | | | | |
Collapse
|
14
|
Misra M, Sharma R, Kant R, Maulik P, Tripathi R. One pot protecting group free synthesis of multifunctional biphenyl methyl-C-β-d-glycosides in aqueous medium. Tetrahedron 2011. [DOI: 10.1016/j.tet.2010.11.067] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
15
|
Cavezza A, Boulle C, Guéguiniat A, Pichaud P, Trouille S, Ricard L, Dalko-Csiba M. Synthesis of Pro-XylaneTM: A new biologically active C-glycoside in aqueous media. Bioorg Med Chem Lett 2009; 19:845-9. [DOI: 10.1016/j.bmcl.2008.12.037] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2008] [Revised: 11/28/2008] [Accepted: 12/02/2008] [Indexed: 11/28/2022]
|
16
|
Vieira AS, Fiorante PF, Hough TLS, Ferreira FP, Lüdtke DS, Stefani HA. Nucleophilic Addition of Potassium Alkynyltrifluoroborates to d-Glucal Mediated by BF3·OEt2: Highly Stereoselective Synthesis of α-C-glycosides. Org Lett 2008; 10:5215-8. [DOI: 10.1021/ol8022177] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Adriano S. Vieira
- Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, Av. Prof. Lineu Prestes, 580 São Paulo, Brazil, and Departamento de Biofísica, Universidade Federal de São Paulo, SP, Brazil
| | - Pedro F. Fiorante
- Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, Av. Prof. Lineu Prestes, 580 São Paulo, Brazil, and Departamento de Biofísica, Universidade Federal de São Paulo, SP, Brazil
| | - Thomas L. S. Hough
- Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, Av. Prof. Lineu Prestes, 580 São Paulo, Brazil, and Departamento de Biofísica, Universidade Federal de São Paulo, SP, Brazil
| | - Fernando P. Ferreira
- Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, Av. Prof. Lineu Prestes, 580 São Paulo, Brazil, and Departamento de Biofísica, Universidade Federal de São Paulo, SP, Brazil
| | - Diogo S. Lüdtke
- Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, Av. Prof. Lineu Prestes, 580 São Paulo, Brazil, and Departamento de Biofísica, Universidade Federal de São Paulo, SP, Brazil
| | - Hélio A. Stefani
- Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, Av. Prof. Lineu Prestes, 580 São Paulo, Brazil, and Departamento de Biofísica, Universidade Federal de São Paulo, SP, Brazil
| |
Collapse
|
17
|
Synthesis of β-C-glycopyranosyl-1,4-naphthoquinone derivatives and their cytotoxic activity. Carbohydr Res 2008; 343:773-9. [DOI: 10.1016/j.carres.2007.12.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2007] [Revised: 12/18/2007] [Accepted: 12/18/2007] [Indexed: 11/18/2022]
|
18
|
Nguyen QV, Leconte S, Brown E, Grée D, Grée R, Dujardin G. A Straightforward and Flexible [4 + 2] Route to β-C-Naphthyl-2-deoxy-glycosides through Tandem Hydroboration-Ketal Reduction: De Novo Access to C-Naphthyl-6-fluoro and 6,6-Difluoro 2-Deoxyglycosides. J Org Chem 2005; 70:2641-50. [PMID: 15787555 DOI: 10.1021/jo048042j] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[reaction: see text] Under standard hydroboration-oxidation conditions, the dihydropyrans 4 underwent a highly stereocontrolled tandem reaction, involving the expected hydration of the double bond together with the reduction of the ketal moiety. This unprecedented transformation gives rise to a short, [4 + 2]-based synthetic route to (+/-)-beta-C-naphthyl-2-deoxyglycosides 5, which allows a significant structural and functional diversity at C-6. We thus described the first synthesis of (+/-)-C-aryl-6-fluoro and -6,6-difluoro olivosides, via the allylic mono- and difluorides produced by regioselective fluorination of, respectively, hydroxyalkyl and oxoalkyl dihydropyran derivatives.
Collapse
Affiliation(s)
- Quang Vu Nguyen
- UCO2M, UMR CNRS 6011, Université du Maine, 72085 Le Mans Cedex 9, France
| | | | | | | | | | | |
Collapse
|
19
|
Xue S, He L, Han KZ, Zheng XQ, Guo QX. Synthesis of alkyl and aryl C-pyranosides using organozinc reagents via a Ferrier-type rearrangement. Carbohydr Res 2005; 340:303-7. [PMID: 15639250 DOI: 10.1016/j.carres.2004.11.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2004] [Accepted: 11/13/2004] [Indexed: 10/26/2022]
Abstract
The reaction of 1,2-dihydropyranyl acetates with dimethylzinc, diethylzinc and diphenylzinc in the presence of CF3COOH gave the corresponding alky and aryl C-pyranosides via a Ferrier rearrangement in excellent yields. Use of the organozinc species, CF3CO2ZnPh, reacted with high stereoselectivity to give the phenyl C-glycosides. Arylzinc chlorides could also be successfully applied to this reaction in the presence of BF3.OEt2.
Collapse
Affiliation(s)
- Song Xue
- Department of Chemistry, University of Science and Technology of China, Hefei 230026, PR China.
| | | | | | | | | |
Collapse
|