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Salamci E, Lafzi AK. Efficient synthesis of aziridinecyclooctanediol and 3-aminocyclooctanetriol. Beilstein J Org Chem 2022; 18:1539-1543. [DOI: 10.3762/bjoc.18.163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Accepted: 11/03/2022] [Indexed: 11/13/2022] Open
Abstract
Cyclooctene endoperoxide was used as the key compound for the synthesis of aziridinecyclooctanediol and 3-aminocyclooctanetriol. Reduction of the cyclooctene endoperoxide, prepared by photooxygenation of cis,cis-1,3-cyclooctadiene, with zinc gave a cyclooctenediol and then benzylation of the hydroxy group yielded dibenzylated cyclooctene. Oxidation of the latter compound by OsO4/NMO followed by mesylation of the hydroxy group provided bis(benzyloxy)cyclooctane-1,2-diyl dimethanesulfonate. Reaction of the bis(benzyloxy)cyclooctane-1,2-diyl dimethanesulfonate with NaN3 gave 2-azido-3,8-bis(benzyloxy)cyclooctyl methanesulfonate. Reduction of the azide group and debenzylation to give an amine provided the new 3-aminocyclooctanetriol. Treatment of the 2-azido-3,8-bis(benzyloxy)cyclooctyl methanesulfonate with Zn/NH4Cl and debenzylation resulted in the target aziridinecyclooctanediol.
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2
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Salamci E, Zozik Y. Stereoselective syntheses of 3-aminocyclooctanetriols and halocyclooctanetriols. Beilstein J Org Chem 2021; 17:705-710. [PMID: 33777245 PMCID: PMC7961859 DOI: 10.3762/bjoc.17.59] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2020] [Accepted: 02/26/2021] [Indexed: 11/23/2022] Open
Abstract
The efficient synthesis of two new stereoisomeric 3-aminocyclooctanetriols and their new halocyclitol derivatives starting from cis,cis-1,3-cyclooctadiene are reported. Reduction of cyclooctene endoperoxide, obtained by photooxygenation of cis,cis-1,3-cyclooctadiene, with zinc yielded a cyclooctene diol followed by acetylation of the hydroxy group, which gave dioldiacetate by OsO4/NMO oxidation. The cyclooctane dioldiacetate prepared was converted to the corresponding cyclic sulfate via the formation of a cyclic sulfite in the presence of catalytic RuO4. The reaction of this cyclic sulfate with a nucleophilic azide followed by the reduction of the azide group provided the target, 3-aminocyclooctanetriol. The second key compound, bromotriol, was prepared by epoxidation of the cyclooctenediol with m-chloroperbenzoic acid followed by hydrolysis with HBr(g) in methanol. Treatment of bromotriol with NaN3 and the reduction of the azide group yielded the other desired 3-aminocyclooctanetriol. Hydrolysis of the epoxides with HCl(g) in methanol gave stereospecifically new chlorocyclooctanetriols.
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Affiliation(s)
- Emine Salamci
- Department of Chemistry, Faculty of Sciences, Atatürk University, 25240 Erzurum, Turkey
| | - Yunus Zozik
- Department of Chemistry, Faculty of Sciences, Atatürk University, 25240 Erzurum, Turkey
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Athiyarath V, Roy NJ, Vijil ATV, Sureshan KM. Synthesis of novel seven-membered carbasugars and evaluation of their glycosidase inhibition potentials. RSC Adv 2021; 11:9410-9420. [PMID: 35423467 PMCID: PMC8698521 DOI: 10.1039/d1ra00804h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Accepted: 02/23/2021] [Indexed: 12/15/2022] Open
Abstract
Here, we report the synthesis of five novel seven-membered carbasugar analogs. We adopted a chiral-pool strategy starting from the cheap and readily available d-mannitol to synthesize these ring-expanded carbasugars. Apart from several regioselective protecting group manipulations, these syntheses involved Wittig olefination and ring-closing metathesis as the key steps. We observed an unprecedented deoxygenation reaction of an allylic benzyl ether upon treatment with H2/Pd during the synthesis. Preliminary biological evaluation of the carbasugars revealed that these ring expanded carbasugars act as inhibitors of various glycosidases. This study highlights the importance of the synthesis of novel ring expanded carbasugars and their biological exploration. Here, we report the synthesis of five novel seven-membered carbasugar analogs.![]()
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Affiliation(s)
- Vignesh Athiyarath
- School of Chemistry
- Indian Institute of Science Education and Research Thiruvananthapuram
- India
| | - Naveen J. Roy
- School of Chemistry
- Indian Institute of Science Education and Research Thiruvananthapuram
- India
| | - A. T. V. Vijil
- School of Chemistry
- Indian Institute of Science Education and Research Thiruvananthapuram
- India
| | - Kana M. Sureshan
- School of Chemistry
- Indian Institute of Science Education and Research Thiruvananthapuram
- India
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Karakılıç E, Baran Ş, Öğütçü H, Akdemir A, Baran A. rac- and meso-Cyclohexanoids: Their α-, β-glycosidases, antibacterial, antifungal activities, and molecular docking studies. Arch Pharm (Weinheim) 2020; 353:e1900267. [PMID: 31922281 DOI: 10.1002/ardp.201900267] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Revised: 11/23/2019] [Accepted: 12/08/2019] [Indexed: 11/12/2022]
Abstract
An efficient and versatile synthesis method has been postulated for hydroxymethylated rac- and meso-cyclohexanoid derivatives. The synthesis of these stereoisomers was achieved easily with traditional methods using hexahydroisobenzofuran 6, prepared from commercially available cis-hydrophthalic anhydride. The study, involving diastereoselective epoxidation and cis-hydroxylation, was conducted to obtain epoxy-, cis-, and trans-diol-furans 7, 8, and 9. After sulfamic acid-catalyzed ring-opening reaction of the epoxide and furan rings, rac- and meso-tetraacetates 14, 15, and 16 were afforded. Hydrolysis of acetate groups with ammonia in absolute methanol yielded the desired tetrols rac-17, meso-18, and meso-19. All structures, after purification by chromatographic methods and elucidation by spectral techniques, were screened against α- and β-glucosidases. Compounds 7, 8, 10, 17, 18, and 19 were also evaluated for their antibacterial and antifungal activity against some selected synthesized compounds with varying degrees of inhibitory effects on the growth of different pathogenic microorganisms by the well-diffusion method. In addition, Saccharomyces cerevisiae α-glucosidase molecular modeling studies were performed for all rac- and meso-compounds 7, 8, 10, 17, 18, and 19.
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Affiliation(s)
- Emel Karakılıç
- Department of Chemistry, Sakarya University, Sakarya, Turkey
| | - Şule Baran
- Department of Biology, Sakarya University, Sakarya, Turkey
| | - Hatice Öğütçü
- Department of Biology, Ahievran University, Kırşehir, Turkey
| | - Atilla Akdemir
- Department of Pharmacology, Bezmialem Vakif University, Istanbul, Turkey
| | - Arif Baran
- Department of Chemistry, Sakarya University, Sakarya, Turkey
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5
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Karavaizoglu UN, Salamci E. An efficient synthesis of chloro-aminocyclooctanediol and aminocyclooctanetriol: an unexpected acetolysis product. NEW J CHEM 2020. [DOI: 10.1039/d0nj02697b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A concise and efficient synthesis of 2-amino-4-chlorocyclooctanediol, aminocyclooctanetriols and unusual 1,3-hydride shift during the ring opening reaction of epoxide is described.
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Affiliation(s)
| | - Emine Salamci
- Department of Chemistry
- Faculty of Sciences
- Atatürk University
- Erzurum 25240
- Turkey
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6
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Stereoselective synthesis of new rac-quercitols containing hydroxymethyl groups as glucosidase inhibitors. Bioorg Med Chem Lett 2018; 28:2555-2560. [PMID: 29866516 DOI: 10.1016/j.bmcl.2018.05.034] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Revised: 05/14/2018] [Accepted: 05/16/2018] [Indexed: 11/20/2022]
Abstract
Stereoselective and efficient synthesis of hydroxymethyl-substituted rac-quercitols (13-15) was achieved, starting from cis-furan (Kobayashi, 2008) with photooxygenation reaction, which is readily available by the reduction of cis-phtalic anhydride. α- and β-Glucosidase enzyme activity of the target molecules was evaluated and good inhibitor activity was seen. One- and two-dimensional NMR spectroscopy, IR spectroscopy and X-ray crystallography were utilized in the structure characterization of products.
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8
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El-Mansy MF, Flister M, Lindeman S, Kalous K, Sem DS, Donaldson WA. Generation of Molecular Complexity from Cyclooctatetraene: Preparation of Aminobicyclo[5.1.0]octitols. Chemistry 2015; 21:10886-95. [DOI: 10.1002/chem.201501274] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Indexed: 11/10/2022]
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Ecer K, Salamci E. Efficient and shortcut syntheses of some novel eight-membered ring cyclitols starting from cycloocta-1,3-diene. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.08.060] [Citation(s) in RCA: 8] [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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Aydin G, Ally K, Aktaş F, Şahin E, Baran A, Balci M. Synthesis and α-Glucosidase and α-Amylase Inhibitory Activity Evaluation of Azido- and Aminocyclitols. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402762] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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11
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Synthesis of branched carbasugars via photooxygenation and manganese(III) acetate free radical cyclization. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.05.069] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Baran A, Aydin G, Savran T, Sahin E, Balci M. Trisequential Photooxygenation Reaction: Application to the Synthesis of Carbasugars. Org Lett 2013; 15:4350-3. [DOI: 10.1021/ol401823m] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Arif Baran
- Department of Chemistry, Sakarya University, 54100 Sakarya, Turkey, Department of Chemistry, Ataturk University, 25240 Erzurum, Turkey, and Department of Chemistry, Middle East Technical University, 06800 Ankara, Turkey
| | - Gokay Aydin
- Department of Chemistry, Sakarya University, 54100 Sakarya, Turkey, Department of Chemistry, Ataturk University, 25240 Erzurum, Turkey, and Department of Chemistry, Middle East Technical University, 06800 Ankara, Turkey
| | - Tahir Savran
- Department of Chemistry, Sakarya University, 54100 Sakarya, Turkey, Department of Chemistry, Ataturk University, 25240 Erzurum, Turkey, and Department of Chemistry, Middle East Technical University, 06800 Ankara, Turkey
| | - Ertan Sahin
- Department of Chemistry, Sakarya University, 54100 Sakarya, Turkey, Department of Chemistry, Ataturk University, 25240 Erzurum, Turkey, and Department of Chemistry, Middle East Technical University, 06800 Ankara, Turkey
| | - Metin Balci
- Department of Chemistry, Sakarya University, 54100 Sakarya, Turkey, Department of Chemistry, Ataturk University, 25240 Erzurum, Turkey, and Department of Chemistry, Middle East Technical University, 06800 Ankara, Turkey
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13
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Griffen JA, White JC, Kociok-Köhn G, Lloyd MD, Wells A, Arnot TC, Lewis SE. New aminocyclitols with quaternary stereocentres via acylnitroso cycloaddition with an ipso,ortho arene dihydrodiol. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.04.033] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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14
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An efficient route for the synthesis of chiral conduritol-derivative carboxamides via palladium-catalyzed aminocarbonylation of bromocyclohexenetetraols. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.05.128] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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15
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Baran A, Çambul S, Nebioglu M, Balci M. Design, synthesis, and biological activities of some branched carbasugars: construction of a substituted 6-oxabicyclo[3.2.1]nonane skeleton. J Org Chem 2012; 77:5086-97. [PMID: 22607049 DOI: 10.1021/jo300655p] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Transformation of cyclohexa-2,4-diene-1,2-diylbis(methylene) diacetate to various carbasugars is described. Photooxygenation of a cyclohexadiene derivative gave a bicyclicendoperoxide, which was reduced with thiourea to [2-[(acetyloxy)methyl]cyclohexa-2,4-dien-1-yl]methyl acetate. Epoxidation of the remaining double bond followed by epoxide ring-opening and hydrolysis of the acetate groups gave one of the target hexols. The bicyclic endoperoxide was rearranged to a diepoxide with CoTPP. The diepoxide was reacted with sulfamic acid in acetic anhydride, resulting in the formation of a new branched carbasugar as well as in the formation of cyclitols with a 6-oxabicyclo[3.2.1]nonane skeleton. The mechanism of the formation of the products is discussed. The inhibition activity of six cyclitol derivatives was tested against α-glycosidase.
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Affiliation(s)
- Arif Baran
- Department of Chemistry, Sakarya University, 54100 Sakarya, Turkey.
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16
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Meimetis LG, Williams DE, Mawji NR, Banuelos CA, Lal AA, Park JJ, Tien AH, Fernandez JG, de Voogd NJ, Sadar MD, Andersen RJ. Niphatenones, glycerol ethers from the sponge Niphates digitalis block androgen receptor transcriptional activity in prostate cancer cells: structure elucidation, synthesis, and biological activity. J Med Chem 2011; 55:503-14. [PMID: 22148427 DOI: 10.1021/jm2014056] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Extracts of the marine sponge Niphates digitalis collected in Dominica showed strong activity in a cell-based assay designed to detect antagonists of the androgen receptor (AR) that could act as lead compounds for the development of a new class of drugs to treat castration recurrent prostate cancer (CRPC). Assay-guided fractionation showed that niphatenones A (3) and B (4), two new glycerol ether lipids, were the active components of the extracts. The structures of 3 and 4 were elucidated by analysis of NMR and MS data and confimed via total synthesis. Biological evaluation of synthetic analogues of the niphatenones has shown that the enantiomers 7 and 8 are more potent than the natural products in the screening assay and defined preliminary SAR for the new AR antagonist pharmacophore, including the finding that the Michael acceptor enone functionality is not required for activity. Niphatenone B (4) and its enantiomer 8 blocked androgen-induced proliferation of LNCaP prostate cancer cells but had no effect on the proliferation of PC3 prostate cancer cells that do not express functional AR, consistent with activity as AR antagonists. Use of the propargyl ether 44 and Click chemistry showed that niphatenone B binds covalently to the activation function-1 (AF1) region of the AR N-terminus domain (NTD).
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Affiliation(s)
- Labros G Meimetis
- Department of Chemistry and Earth, University of British Columbia, 2036 Main Mall, Vancouver, B.C., Canada V6T 1Z1
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Rajender A, Rao JP, Rao BV. A new stereoselective approach to aminocyclohexitols using RCM. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.tetasy.2011.07.009] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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18
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Rao MV, Chandrasekhar B, Rao BV, Swarnalatha JL. A new stereoselective approach to aminocyclohexitols using a Grignard addition on to an N-benzyl sugar imine and RCM. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.tetasy.2011.07.015] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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