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Barotcu AZ, Karanfil A, Şahin E, Kelebekli L. Stereoselective synthesis of novel bis-homoinositols with bicyclo[4.2.0]octane motifs. Carbohydr Res 2022; 519:108611. [PMID: 35716487 DOI: 10.1016/j.carres.2022.108611] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 06/03/2022] [Accepted: 06/06/2022] [Indexed: 11/29/2022]
Abstract
Starting from cyclooctatetraene, bis-homoconduritols with cis-inositol and allo-inositol (or bicyclo[4.2.0]octane motif) structures were synthesized. Photooxygenation of trans-7,8-dibromo-bicyclo[4.2.0]octa-2,4-diene allowed the preparation of tricyclic endoperoxide. The compound diacetate was obtained by reduction of endoperoxide with thiourea followed by acetylation reaction. Removal of halides with zinc dust in acetic acid yielded the dien-diacetate, a key compound of the designed molecules. OsO4 oxidation of diendiacetate followed by acetylation gave the corresponding hexaacetates. Finally, the novel desired bis-homoinositols were obtained in high yield by the ammonolysis of acetate groups. The structures of all synthesized compounds were characterized by spectroscopic methods.
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Affiliation(s)
- Ayşenur Zeren Barotcu
- Department of Chemistry, Faculty of Sciences and Arts, Ordu University, 52200, Ordu, Turkey
| | - Abdullah Karanfil
- Department of Chemistry, Faculty of Sciences and Arts, Ordu University, 52200, Ordu, Turkey
| | - Ertan Şahin
- Department of Chemistry, Faculty of Sciences, Ataturk University, 25240, Erzurum, Turkey
| | - Latif Kelebekli
- Department of Chemistry, Faculty of Sciences and Arts, Ordu University, 52200, Ordu, Turkey.
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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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Tugrak M, Gul HI, Demir Y, Levent S, Gulcin I. Synthesis and in vitro carbonic anhydrases and acetylcholinesterase inhibitory activities of novel imidazolinone-based benzenesulfonamides. Arch Pharm (Weinheim) 2021; 354:e2000375. [PMID: 33283898 DOI: 10.1002/ardp.202000375] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 11/06/2020] [Accepted: 11/13/2020] [Indexed: 02/06/2023]
Abstract
New imidazolinone-based benzenesulfonamides 3a-e and 4a-e were synthesized in three steps and their chemical structures were confirmed by 1 H NMR (nuclear magnetic resonance), 13 C NMR, and high-resolution mass spectrometry. The benzenesulfonamides used were sulfacetamide (3a, 4a), sulfaguanidine (3b, 4b), sulfanilamide (3c, 4c), sulfadiazine (3d, 4d), sulfamerazine (3e), and sulfathiazole (4e). The compounds were evaluated against carbonic anhydrase (CA) and acetylcholinesterase (AChE) enzymes to obtain possible drug candidate/s. The lead compounds of the series were 3a and 4a against human CA (hCA) I, whereas 3d and 4a were leads against hCA II in terms of Ki values. Series 4 includes more effective CAs inhibitors than series 3 (except 3d). Series 4 compounds having a nitro group (except 4d) were 3.3-4.8 times more selective inhibitors than their corresponding analogues 3a-d in series 3, in which hydrogen was located in place of the nitro group, by considering Ki values against hCA II. Compounds 3c and 4c, where the sulfanilamide moiety is available, were the leads in terms of AChE inhibition with the lowest Ki values. The use of secondary sulfonamides was a more effective modification on CA inhibition, whereas the primary sulfonamide was the effective substitution in terms of AChE inhibitory potency.
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Affiliation(s)
- Mehtap Tugrak
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Ataturk University, Erzurum, Turkey
| | - Halise Inci Gul
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Ataturk University, Erzurum, Turkey
| | - Yeliz Demir
- Department of Pharmacy Services, Nihat Delibalta Göle Vocational High School, Ardahan University, Ardahan, Turkey
| | - Serkan Levent
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Anadolu University, Eskişehir, Turkey
| | - Ilhami Gulcin
- Department of Chemistry, Faculty of Science, Ataturk University, Erzurum, Turkey
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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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Istrefi Q, Türkeş C, Arslan M, Demir Y, Nixha AR, Beydemir Ş, Küfrevioğlu Öİ. Sulfonamides incorporating keteneN,S‐acetal bioisosteres as potent carbonic anhydrase and acetylcholinesterase inhibitors. Arch Pharm (Weinheim) 2020; 353:e1900383. [DOI: 10.1002/ardp.201900383] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Revised: 02/28/2020] [Accepted: 03/17/2020] [Indexed: 12/22/2022]
Affiliation(s)
- Qëndresa Istrefi
- Department of Chemistry, Faculty of Mathematical and Natural SciencesUniversity of Prishtina Prishtina, Republic of Kosovo
| | - Cüneyt Türkeş
- Department of Biochemistry, Faculty of PharmacyErzincan Binali Yıldırım University Erzincan Turkey
| | - Mustafa Arslan
- Department of Chemistry, Faculty of Arts and SciencesSakarya University Sakarya Turkey
| | - Yeliz Demir
- Department of Pharmacy Services, Nihat Delibalta Göle Vocational High SchoolArdahan University Ardahan Turkey
| | - Arleta R. Nixha
- Department of Chemistry, Faculty of Mathematical and Natural SciencesUniversity of Prishtina Prishtina, Republic of Kosovo
| | - Şükrü Beydemir
- Department of Biochemistry, Faculty of PharmacyAnadolu University Eskişehir Turkey
| | - Ömer İ. Küfrevioğlu
- Department of Chemistry, Faculty of SciencesAtatürk University Erzurum 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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Karanfil A, Şahin E, Kelebekli L. Synthesis of novel tetrols from syn-bisepoxide: Preparation of halogenated bicyclo[4.2.0] inositols. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.131000] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Kelebekli L, Atlı I. Stereoselective synthesis of a new methyl-substituted inositol derivative. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.130531] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Karakılıç E, Durmuş S, Sevmezler S, Şahin O, Baran A. Regio- and stereospecific synthesis of rac-carbasugar-based cyclohexane pentols; Investigations of their α- and β-glucosidase inhibitions. Bioorg Med Chem 2018; 26:4276-4287. [PMID: 30031655 DOI: 10.1016/j.bmc.2018.07.021] [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: 05/30/2018] [Revised: 07/11/2018] [Accepted: 07/12/2018] [Indexed: 10/28/2022]
Abstract
In the present study, (3aR,7aS)-1,3,3a,4,7,7a-hexahydroisobenzofuran was submitted to photooxygenation and two isomeric hydroperoxides were successfully obtained. Without any further purification, reduction of the hydroperoxides with titanium tetraisopropoxide catalyzed by dimethyl sulfide gave two alcohol isomers in high yields. After acetylation of alcohol with Ac2O in pyridine, epoxidation reaction of formed monoacetates with m-CPBA, then chromatographed and followed by hydrolysis of the acetate groups with NH3 in CH3OH resulted in the formation of epoxy alcohol isomers respectively. These epoxy alcohol isomers were subjected to trans-dihydroxylation reaction with acid (H2SO4) in the presence of water to afford triols. Acetylation of the free hydroxyl groups produced benzofuran triacetates in high yields. Ring-opening reaction of furan triacetates with sulfamic acid catalyzed in the presence of acetic acid/acetic anhydrate and subsequently hydrolysis of the acetate groups with ammonia gave the targeted cyclohexane carbasugar-based pentols. All products were separated and purified by chromatographic and crystallographic methods. Structural analyses of all compounds were conducted by spectral techniques including NMR and X-ray analyses. The biological inhibition activity of the target compounds was tested against glycosidase enzymes, α- and β-glucosidase.
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Affiliation(s)
- Emel Karakılıç
- Department of Chemistry, Sakarya University, 54187 Sakarya, Turkey
| | - Sümeyye Durmuş
- Department of Chemistry, Sakarya University, 54187 Sakarya, Turkey
| | - Sedat Sevmezler
- Department of Chemistry, Sakarya University, 54187 Sakarya, Turkey
| | - Onur Şahin
- Application and Research Center, Sinop University, 57000 Sinop, Turkey
| | - Arif Baran
- Department of Chemistry, Sakarya University, 54187 Sakarya, Turkey.
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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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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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