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Synthesis and biological effects evaluation of benzoconduritols C and D from oxabenzonorbornadiene. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2022. [DOI: 10.1007/s13738-021-02428-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Aksu K, Akincioglu H, Gulcin I, Kelebekli L. Concise syntheses and some biological activities of dl-2,5-di-O-methyl-chiro-inositol, dl-1,4-di-O-methyl-scyllo-inositol, and dl-1,6-dibromo-1,6-dideoxy-2,5-di-O-methyl-chiro-inositol. Arch Pharm (Weinheim) 2020; 354:e2000254. [PMID: 32997390 DOI: 10.1002/ardp.202000254] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 09/07/2020] [Accepted: 09/10/2020] [Indexed: 11/11/2022]
Abstract
The regio- and stereospecific synthesis of O-methyl-chiro-inositols and O-methyl-scyllo-inositol was achieved, starting from p-benzoquinone. After preparing dimethoxy conduritol-B as a key compound, regiospecific bromination of the alkene moiety of dimethoxy conduritol-B and acid-catalyzed ring opening of dimethoxydiacetate conduritol-B epoxide with Ac2 O afforded the desired new chiro-inositol derivatives and scyllo-inositol derivative, respectively. Spectroscopic methods were employed for the characterization of all synthesized compounds. The novel inositols (11-17) had effective inhibition profiles against human carbonic anhydrase isoenzymes I and II (hCA I and II) and acetylcholinesterase (AChE). The novel inositols 11-17 were found to be effective inhibitors against AChE, hCA I, and hCA II enzymes. Ki values were calculated in the range of 87.59 ± 7.011 to 237.95 ± 17.75 μM for hCA I, 65.08 ± 12.39 to 538.98 ± 61.26 μM for hCA II, and 193.28 ± 43.13 to 765.08 ± 209.77 μM for AChE, respectively. Also, due to the inhibitory effects of the novel inositols 11-17 against the tested enzymes, these novel inositols are potential drug candidates to treat some diseases such as glaucoma, epilepsy, leukemia, and Alzheimer's disease.
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Affiliation(s)
- Kadir Aksu
- Department of Chemistry, Faculty of Sciences and Arts, Ordu University, Ordu, Turkey
| | - Hulya Akincioglu
- Department of Chemistry, Faculty of Sciences and Arts, Agri Ibrahim Cecen University, Agri, Turkey
| | - Ilhami Gulcin
- Department of Chemistry, Faculty of Sciences, Ataturk University, Erzurum, Turkey
| | - Latif Kelebekli
- Department of Chemistry, Faculty of Sciences and Arts, Ordu University, Ordu, Turkey
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Kelebekli L, Kaplan D. A novel and stereoselective synthesis of 2-bromo-6-chloro-5-methylcyclohex-4-ene-1,3-diyl diacetate: conduritol-A derivative. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2020. [DOI: 10.1007/s13738-019-01810-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Kelebekli L, Aksu K, Şahin E. Regio- and stereospecific synthesis of dl-4,5-dibromo-4,5-dideoxy-3,6-O-methyl-chiro-inositol. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.02.050] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Kelebekli L, Balcı N, Şahin E. Oxazolidinone polycyclitols. Stereospecific synthesis of novel aminocarbasugars with oxazolidinone ring. Tetrahedron 2012. [DOI: 10.1016/j.tet.2011.12.078] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Kelebekli L. Synthesis of Anti–-anti (anti–-syn)-3,4:8,9-Tetraacetoxy-11-Oxa-Tricyclo [4.4.1.01,6]Undecanes. JOURNAL OF CHEMICAL RESEARCH 2011. [DOI: 10.3184/174751911x12964930076566] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Synthesis of anti–-anti- and anti–-syn-3,4:8,9-tetraacetoxy-11-oxa-tricyclo[4.4.1.01,6] undecanes have been achieved starting from naphthalene. The Birch reduction of naphthalene gave 1,4,5,8-tetrahydro-naphthalene in high yield. 1,4,5,8-Tetrahydro-naphthalene was selectively oxidised with mCPBA to give 11-oxa-tricyclo[4.4.1.01,6]undeca-3,8-diene. OsO4 oxidation followed by acetylation furnished the corresponding tetraacetates.
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Affiliation(s)
- Latif Kelebekli
- Department of Chemistry, Faculty of Science and Arts, Ordu University, 52200 Ordu, Turkey
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Kelebekli L, Celik M, Kara Y. A Novel and Stereospecific Synthesis of Aminocyclitol: N-Tosyldihydroconduramine E2. JOURNAL OF CHEMICAL RESEARCH 2010. [DOI: 10.3184/030823410x12628681698796] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A stereospecific synthesis of N-tosyldihydroconduramine E2, a new aminocyclitol, has been synthesised starting from cyclohexa-1,3-diene. The photooxygenation of cyclohexa-1,3-diene afforded the bicyclic endoperoxide. Reduction of the endoperoxide with thiourea and then reaction of the bis-carbamate with p-TsNCO followed by a palladium-catalysed ionisation/cyclisation reaction, gave a vinyl oxazolidin-2-one. Oxidation of the double bond in the oxazolidin-2-one with KMnO4 followed by acetylation, gave the oxazolidinone-diacetates. Hydrolysis of the oxazolidinone ring and removal of the acetate groups gave the desired aminocyclitol, N-tosyldihydroconduramine E2.
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Affiliation(s)
- Latif Kelebekli
- Department of Chemistry, Ordu University, Ordu, Turkey
- Department of Chemistry, Atatürk University, 25240 Erzurum, Turkey
| | - Murat Celik
- Department of Chemistry, Atatürk University, 25240 Erzurum, Turkey
| | - Yunus Kara
- Department of Chemistry, Atatürk University, 25240 Erzurum, Turkey
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Oztaskin N, Kelebekli L, Goksu S, Anil B, Sahin E. Synthesis and Characterisation of 2,3,4a,6,8a-penta-acetoxy decahydronaphthalene from 1,2,3,4-tetrahydronaphthalen-2-ol. JOURNAL OF CHEMICAL RESEARCH 2009. [DOI: 10.3184/030823409x431337] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
2,3,4a,6,8a-Penta-acetoxy decahydronaphthalene has been synthesised starting from 1,2,3,4-tetrahydronaphthalen-2-ol. The Birch reduction of 1,2,3,4-tetrahydronaphthalen-2-ol gave a high yield of 1,2,3,4,5,8-hexahydronaphthalen-2-ol which was acetylated. The OsO4 oxidation of the 1,2,3,4,5,8-hexahydronaphthalen-2-yl acetate followed by further acetylation gave the pentaacetates.
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Affiliation(s)
- Necla Oztaskin
- Department of Chemistry, Atatürk University, 25240 Erzurum, Turkey
| | - Latif Kelebekli
- Department of Chemistry, Atatürk University, 25240 Erzurum, Turkey
- Faculty of Education, University of Ağri Ibrahim Çeçen,04200 Agri, Turkey
| | - Suleyman Goksu
- Department of Chemistry, Atatürk University, 25240 Erzurum, Turkey
| | - Baris Anil
- Department of Chemistry, Atatürk University, 25240 Erzurum, Turkey
| | - Ertan Sahin
- Department of Chemistry, Atatürk University, 25240 Erzurum, Turkey
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Balci N, Kelebekli L, Goksu S, Anil B, Sahin E. Synthesis and Characterisation of 2,3a,5,6,7a-pentaacetoxy-octahydro-1H-indene from indan-2-ol. JOURNAL OF CHEMICAL RESEARCH 2009. [DOI: 10.3184/030823409x430211] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A synthesis of 2,3a,5,6,7a-pentaacetoxyoctahydro-1 H-indene has been achieved starting from indan-2-ol. The Birch reduction of indan-2-ol gave 4,7-dihydro-2-indanol in high yield which when followed by acetylation, resulted in the corresponding acetates. The OsO4 oxidation of the 2-acetoxy-4,7-dihydroindane followed by acetylation furnished the desired pentaacetates in high yield.
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Affiliation(s)
- Neslihan Balci
- Department of Chemistry, Atatürk University, 25240 Erzurum, Turkey
| | - Latif Kelebekli
- Department of Chemistry, Atatürk University, 25240 Erzurum, Turkey
- Faculty of Education, Ağrι Ibrahim Çeçen University, 04200 Ağrι, Turkey
| | - Suleyman Goksu
- Department of Chemistry, Atatürk University, 25240 Erzurum, Turkey
| | - Baris Anil
- Department of Chemistry, Atatürk University, 25240 Erzurum, Turkey
| | - Ertan Sahin
- Department of Chemistry, Atatürk University, 25240 Erzurum, Turkey
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Kelebekli L. Regio- and stereospecific synthesis of a new benzoconduritol-C derivative. JOURNAL OF CHEMICAL RESEARCH 2008. [DOI: 10.3184/030823408x287104] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A stereospecific synthesis of 3-(2-bromophenoxy)-1,2,3,4-tetrahydronaphthalen-1,2,4-triol (benzoconduritol-C derivative) has been achieved by a fully regio- and stereospecific rhodium catalysed reaction of oxabenzonorbornadiene in the presence of 2-bromophenol.
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Affiliation(s)
- Latif Kelebekli
- Department of Chemistry, Faculty of Arts and Science, Atatürk University, 25240 Erzurum, Turkey
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