1
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Long YJ, Shen JH, Wei Y, Shi M. Substrate-Controlled [8 + 3] Cycloaddition of Tropsulfimides and Tropones with Zwitterionic Allenyl Palladium Species Derived from Vinylidenecyclopropane-diesters. J Org Chem 2024. [PMID: 39365947 DOI: 10.1021/acs.joc.4c01579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/06/2024]
Abstract
A palladium-catalyzed regioselective [8 + 3] cycloaddition of tropsulfimides and tropones with vinylidenecyclopropane-diesters (VDCP-diesters) has been disclosed in this paper, affording decahydro-1H-cyclohepta[b]pyridine derivatives bearing an allene moiety or decahydro-1H-cyclohepta[b]pyran derivatives having a conjugated diene unit in moderate to good yields. The reactions proceed through a zwitterionic allenyl palladium species derived from VDCP-diesters. The substrate scopes have been investigated and the plausible reaction mechanisms have also been proposed according to the previous work, the first captured zwitterionic Pd-allenyl intermediate, and control experiments.
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Affiliation(s)
- Yong-Jie Long
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, University of Chinese Academy of Sciences, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, People's Republic of China
| | - Jia-Hao Shen
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, University of Chinese Academy of Sciences, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, People's Republic of China
| | - Yin Wei
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, University of Chinese Academy of Sciences, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, People's Republic of China
| | - Min Shi
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, University of Chinese Academy of Sciences, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, People's Republic of China
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2
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Hossain A, Anderson RL, Zhang CS, Chen PJ, Fu GC. Nickel-Catalyzed Enantioconvergent and Diastereoselective Allenylation of Alkyl Electrophiles: Simultaneous Control of Central and Axial Chirality. J Am Chem Soc 2024; 146:7173-7177. [PMID: 38447585 PMCID: PMC11003353 DOI: 10.1021/jacs.4c00593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2024]
Abstract
In recent years, remarkable progress has been described in the development of methods that simultaneously control vicinal stereochemistry, wherein both stereochemical elements are central chirality; in contrast, methods that control central and axial chirality are comparatively rare. Herein we report that a chiral nickel catalyst achieves the enantioconvergent and diastereoselective coupling of racemic secondary alkyl electrophiles with prochiral 1,3-enynes (in the presence of a hydrosilane) to generate chiral tetrasubstituted allenes that bear an adjacent stereogenic center. A carbon-carbon and a carbon-hydrogen bond are formed in this process, which provides good stereoselectivity and is compatible with an array of functional groups.
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Affiliation(s)
- Asik Hossain
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Robert L Anderson
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Claudia S Zhang
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Peng-Jui Chen
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Gregory C Fu
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
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3
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Li C, Zhou Z, Ma S. A Pd-catalyzed highly selective three-component protocol for trisubstituted allenes. Chem Sci 2023; 14:7709-7715. [PMID: 37476716 PMCID: PMC10355113 DOI: 10.1039/d3sc01849k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2023] [Accepted: 06/20/2023] [Indexed: 07/22/2023] Open
Abstract
Herein we report the first example of a Pd-catalyzed highly selective three-component reaction of alkynyl-1,4-diol dicarbonates, organoboronic acids, and malonate anions for the efficient synthesis of trisubstituted 2,3-allenyl malonates not readily available by the known protocols. The reaction demonstrates an excellent regio- and chemo-selectivity for both the oxidative addition referring to the two C-O bonds and the subsequent coupling with the nucleophile with a remarkable functional group compatibility. A series of control experiments confirm a unique mechanism involving β-O elimination forming alka-1,2,3-triene and the subsequent insertion of its terminal C[double bond, length as m-dash]C bond into the Ar-Pd bond.
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Affiliation(s)
- Can Li
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Zhengnan Zhou
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Shengming Ma
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 P. R. China
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University 220 Handan Lu Shanghai 200433 P. R. China
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4
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Deliaval M, Jayarajan R, Eriksson L, Szabó KJ. Three-Component Approach to Densely Functionalized Trifluoromethyl Allenols by Asymmetric Organocatalysis. J Am Chem Soc 2023; 145:10001-10006. [PMID: 37126044 PMCID: PMC10176480 DOI: 10.1021/jacs.3c02852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
We have developed a new three-component catalytic coupling reaction of alkynyl boronates, diazomethanes, and aliphatic/aromatic ketones in the presence of BINOL derivatives. The reaction proceeds with a remarkably high enantio- and diastereoselectivity (up to three contiguous stereocenters) affording tertiary CF3-allenols in a single operational step. The reaction proceeds under mild, neutral, metal-free conditions, which leads to a high level of functional group tolerance.
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Affiliation(s)
- Marie Deliaval
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Ramasamy Jayarajan
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Lars Eriksson
- Department of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Kálmán J Szabó
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
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5
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Martynovskaya SV, Shcherbakova VS, Ushakov IA, Borodina TN, Ivanov AV. Expedient synthesis of a new class of organic building blocks: N-allenylpyrrole-2-carbaldehydes. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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6
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New drug approvals for 2019: Synthesis and clinical applications. Eur J Med Chem 2020; 205:112667. [DOI: 10.1016/j.ejmech.2020.112667] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 07/13/2020] [Accepted: 07/13/2020] [Indexed: 12/17/2022]
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7
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Zhao Y, Guo X, Wang Z, Shen D, Chen T, Wu N, Yan S, You J. TBAF-Catalyzed Cyclization Reactions of o
-(Alkynyl)phenyl Propargyl Alcohols with Malonate Esters: A Possible Cation-π Interaction as The Activation Approach. European J Org Chem 2020. [DOI: 10.1002/ejoc.201901790] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Yulei Zhao
- School of Chemistry and Chemical Engineering; Qufu Normal University; 273165 Qufu China
| | - Xuqiang Guo
- School of Chemistry and Chemical Engineering; Qufu Normal University; 273165 Qufu China
| | - Zongkang Wang
- School of Chemistry and Chemical Engineering; Qufu Normal University; 273165 Qufu China
| | - Duyi Shen
- School of Chemistry and Chemical Engineering; Qufu Normal University; 273165 Qufu China
| | - Tingting Chen
- School of Chemistry and Chemical Engineering; Qufu Normal University; 273165 Qufu China
| | - Nan Wu
- School of Chemistry and Chemical Engineering; Qufu Normal University; 273165 Qufu China
| | - Shina Yan
- School of Chemistry and Chemical Engineering; Qufu Normal University; 273165 Qufu China
| | - Jinmao You
- School of Chemistry and Chemical Engineering; Qufu Normal University; 273165 Qufu China
- Northwest Institute of Plateau Biology; Chinese Academy of Science; 810001 Xining China
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8
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Zhao Y, Zhang Z, Liu X, Wang Z, Cao Z, Tian L, Yue M, You J. TBAF-Catalyzed O-Nucleophilic Cyclization of Enaminones: A Process for the Synthesis of Dihydroisobenzofuran Derivatives. J Org Chem 2019; 84:1379-1386. [DOI: 10.1021/acs.joc.8b02842] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Yulei Zhao
- Key Laboratory of Life-Organic Analysis, Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine, School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, Shandong, 273165, China
| | - Zheng Zhang
- Key Laboratory of Life-Organic Analysis, Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine, School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, Shandong, 273165, China
| | - Xu Liu
- Key Laboratory of Life-Organic Analysis, Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine, School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, Shandong, 273165, China
| | - Zongkang Wang
- Key Laboratory of Life-Organic Analysis, Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine, School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, Shandong, 273165, China
| | - Ziping Cao
- Key Laboratory of Life-Organic Analysis, Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine, School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, Shandong, 273165, China
| | - Laijin Tian
- Key Laboratory of Life-Organic Analysis, Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine, School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, Shandong, 273165, China
| | - Mingbo Yue
- Key Laboratory of Life-Organic Analysis, Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine, School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, Shandong, 273165, China
| | - Jinmao You
- Key Laboratory of Life-Organic Analysis, Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine, School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, Shandong, 273165, China
- Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Science, Xining, 810001, China
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9
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10
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Pandurangan K, Aletti AB, Montroni D, Kitchen JA, Martínez-Calvo M, Blasco S, Gunnlaugsson T, Scanlan EM. Supramolecular Anion Recognition Mediates One-Pot Synthesis of 3-Amino-[1,2,4]-triazolo Pyridines from Thiosemicarbazides. Org Lett 2017; 19:1068-1071. [DOI: 10.1021/acs.orglett.6b03645] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Komala Pandurangan
- School of Chemistry, Trinity
College Dublin and Trinity Biomedical Science Institute (TBSI), The University of Dublin, Dublin 2, Ireland
| | - Anna B. Aletti
- School of Chemistry, Trinity
College Dublin and Trinity Biomedical Science Institute (TBSI), The University of Dublin, Dublin 2, Ireland
| | - Devis Montroni
- School of Chemistry, Trinity
College Dublin and Trinity Biomedical Science Institute (TBSI), The University of Dublin, Dublin 2, Ireland
| | - Jonathan. A. Kitchen
- School of Chemistry, Trinity
College Dublin and Trinity Biomedical Science Institute (TBSI), The University of Dublin, Dublin 2, Ireland
| | - Miguel Martínez-Calvo
- School of Chemistry, Trinity
College Dublin and Trinity Biomedical Science Institute (TBSI), The University of Dublin, Dublin 2, Ireland
| | - Salvador Blasco
- School of Chemistry, Trinity
College Dublin and Trinity Biomedical Science Institute (TBSI), The University of Dublin, Dublin 2, Ireland
| | - Thorfinnur Gunnlaugsson
- School of Chemistry, Trinity
College Dublin and Trinity Biomedical Science Institute (TBSI), The University of Dublin, Dublin 2, Ireland
| | - Eoin M. Scanlan
- School of Chemistry, Trinity
College Dublin and Trinity Biomedical Science Institute (TBSI), The University of Dublin, Dublin 2, Ireland
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11
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Synthesis and transformations of metallacycles. 45. Cross-cyclomagnesiation of 1,2-dienes in the synthesis of 5Z,9Z-dienoic acids, efficient inhibitors of human topoisomerase I. Russ Chem Bull 2016. [DOI: 10.1007/s11172-015-1128-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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12
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Kasal A, Buděšínský M, Mareš P, Krištofíková Z, Leitão AJ, Sá e Melo ML, Silva MMC. Neurosteroids: Can a 2alpha,3alpha-epoxy ring make up for the 3alpha-hydroxyl group? Steroids 2016; 105:12-8. [PMID: 26631551 DOI: 10.1016/j.steroids.2015.11.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Revised: 11/06/2015] [Accepted: 11/19/2015] [Indexed: 10/22/2022]
Abstract
Seven steroid epoxides were prepared from 5α-pregn-2-en-20-one and 5α-pregn-3-en-20-one and their side-chain derivatives. All compounds were tested in vitro for binding to γ-aminobutyric acid (GABAA) receptor, some of them also in vivo for anticonvulsant action. 2α,3α-Epoxy-5α-pregnan-20-one inhibited the TBPS binding to the GABAA receptor and showed a moderate anticonvulsant action in immature rats. In contrast, its 3α,4α-isomer was inactive. More polar epoxide derivatives, modified at the side chain were less active or inactive. Noteworthy, diol 20, the product of trans-diaxial opening of the 2α,3α-epoxide 4, was not able to inhibit the TBPS binding, showing that the activity of the epoxide is due to the compound itself and not to its hydrolytic product. The 3α-hydroxyl group is known to be essential for the GABAA receptor binding. Despite the shortness of in vivo effects which are probably due to metabolic inactivation of the products prepared, our results show that the 2α,3α-epoxy ring is another structural pattern with ability to bind the GABAAR.
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Affiliation(s)
- Alexander Kasal
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences, Prague CZ16610, Czech Republic.
| | - Miloš Buděšínský
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences, Prague CZ16610, Czech Republic
| | - Pavel Mareš
- Institute of Physiology, Academy of Sciences, CZ14220 Prague 4, Czech Republic
| | - Zdena Krištofíková
- Alzheimer's Disease Center, National Institute of Mental Health, Klecany CZ25067, Czech Republic
| | - Alcino J Leitão
- Faculdade de Farmácia, Universidade de Coimbra, 3000-508 Coimbra, Portugal; CNC - Centre for Neurosciences and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal
| | - Maria Luisa Sá e Melo
- Faculdade de Farmácia, Universidade de Coimbra, 3000-508 Coimbra, Portugal; CNC - Centre for Neurosciences and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal
| | - Maria Manuel C Silva
- Faculdade de Farmácia, Universidade de Coimbra, 3000-508 Coimbra, Portugal; CNC - Centre for Neurosciences and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal
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13
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D'yakonov VA, Dzhemileva LU, Tuktarova RA, Makarov AA, Islamov II, Mulyukova AR, Dzhemilev UM. Catalytic cyclometallation in steroid chemistry III: Synthesis of steroidal derivatives of 5Z,9Z-dienoic acid and investigation of its human topoisomerase I inhibitory activity. Steroids 2015; 102:110-7. [PMID: 26276106 DOI: 10.1016/j.steroids.2015.08.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Revised: 08/03/2015] [Accepted: 08/08/2015] [Indexed: 11/20/2022]
Abstract
Two approaches to stereoselective synthesis of steroid 5Z,9Z-dienoic acids were developed, the first one being based on the cross-cyclomagnesiation of 2-(hepta-5,6-dien-1-yloxy)tetrahydro-2H-pyran and 1,2-diene cholesterol derivatives on treatment with EtMgBr catalyzed by Cp2TiCl2, while the other involving the synthesis of esters of hydroxy steroids with (5Z,9Z)-tetradeca-5,9-dienedioic acid, prepared in two steps using homo-cyclomagnesiation of 2-(hepta-5,6-dien-1-yloxy)tetrahydro-2H-pyran as the key step. High inhibitory activity of the synthesized acids against human topoisomerase I (hTop1) was found.
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Affiliation(s)
- Vladimir A D'yakonov
- Institute of Petrochemistry and Catalysis, Russian Academy of Science, 141 Prospekt Oktyabrya, 450075 Ufa, Russian Federation.
| | - Lilya U Dzhemileva
- Department of Immunology and Human Reproductive Health, Bashkir State Medical University, 3 Lenin Street, Ufa, Bashkortostan 450003, Russian Federation.
| | - Regina A Tuktarova
- Institute of Petrochemistry and Catalysis, Russian Academy of Science, 141 Prospekt Oktyabrya, 450075 Ufa, Russian Federation
| | - Aleksey A Makarov
- Institute of Petrochemistry and Catalysis, Russian Academy of Science, 141 Prospekt Oktyabrya, 450075 Ufa, Russian Federation
| | - Ilgiz I Islamov
- Institute of Petrochemistry and Catalysis, Russian Academy of Science, 141 Prospekt Oktyabrya, 450075 Ufa, Russian Federation
| | - Alfiya R Mulyukova
- Institute of Petrochemistry and Catalysis, Russian Academy of Science, 141 Prospekt Oktyabrya, 450075 Ufa, Russian Federation
| | - Usein M Dzhemilev
- Institute of Petrochemistry and Catalysis, Russian Academy of Science, 141 Prospekt Oktyabrya, 450075 Ufa, Russian Federation
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14
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Effect of synthetic steroids on GABAA receptor binding in rat brain. Neuroscience 2015; 290:138-46. [DOI: 10.1016/j.neuroscience.2014.12.082] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2014] [Revised: 11/20/2014] [Accepted: 12/17/2014] [Indexed: 11/24/2022]
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15
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Design and synthesis of 21-alkynylaryl pregnenolone derivatives and evaluation of their anticancer activity. Bioorg Med Chem 2014; 22:6980-8. [DOI: 10.1016/j.bmc.2014.10.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2014] [Revised: 10/04/2014] [Accepted: 10/09/2014] [Indexed: 11/20/2022]
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16
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Rey M, Kruse MS, Alvarez LD, Ghini AA, Veleiro AS, Burton G, Coirini H. Neuroprotective action of synthetic steroids with oxygen bridge. Activity on GABAA receptor. Exp Neurol 2013; 249:49-58. [DOI: 10.1016/j.expneurol.2013.07.020] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2013] [Revised: 07/24/2013] [Accepted: 07/27/2013] [Indexed: 11/16/2022]
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17
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Hitchin JR, Hamilton NM, Jordan AM, Lyons AJ, Ogilvie DJ. A novel scalable and stereospecific synthesis of 3α- and 3β-amino-5α-androstan-17-ones and 3α- and 3β-amino-5α-pregnan-20-ones. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.03.124] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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18
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Zhang Z, Wang L, Bian X, Sun Q, Xu H, Wang C. First Synthesis of a C-Homosteroid from Pregn-4-ene-3,11,20-trione. Helv Chim Acta 2011. [DOI: 10.1002/hlca.201000132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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19
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Differential effects of two major neurosteroids on cerebellar and cortical GABAA receptor binding and function. Eur J Pharmacol 2011; 650:94-101. [DOI: 10.1016/j.ejphar.2010.10.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2010] [Revised: 08/12/2010] [Accepted: 10/03/2010] [Indexed: 11/20/2022]
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20
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Calogeropoulou T, Avlonitis N, Minas V, Alexi X, Pantzou A, Charalampopoulos I, Zervou M, Vergou V, Katsanou ES, Lazaridis I, Alexis MN, Gravanis A. Novel dehydroepiandrosterone derivatives with antiapoptotic, neuroprotective activity. J Med Chem 2009; 52:6569-87. [PMID: 19845386 DOI: 10.1021/jm900468p] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
DHEA analogues with modifications at positions C3 or C17 were synthesized and evaluated for neuroprotective activity against the neural-crest-derived PC12 cell model of serum deprivation-induced apoptosis. The most potent compounds were the spiro-epoxy derivatives 17beta-spiro[5-androstene-17,2'-oxiran]-3beta-ol (20), (20S)-3beta,21-dihydroxy-17beta,20-epoxy-5-pregnene (23), and (20R)-3beta,21-dihydroxy-17alpha,20-epoxy-5-pregnene (27) with IC(50) values of 0.19 +/- 0.01, 99.0 +/- 4.6, and 6.4 +/- 0.3 nM, respectively. Analogues 20, 23, and 27, up to the micromolar range of concentrations, were unable to activate estrogen receptor alpha and beta (ERalpha and ERbeta) or to interfere with ER-dependent gene expression significantly. In addition, they were unable to stimulate the growth of Ishikawa, MCF-7, and LNCaP cells. Our results suggest that the spiro-epoxyneurosteroid derivatives 20, 23, and 27 may prove to be lead molecules for the synthesis of novel neuroprotective agents.
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Affiliation(s)
- Theodora Calogeropoulou
- Institute of Organic and Pharmaceutical Chemistry, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue 11635, Athens, Greece.
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21
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Okutani M, Mori Y. Conversion of Bromoalkenes into Alkynes by Wet Tetra-n-butylammonium Fluoride. J Org Chem 2008; 74:442-4. [DOI: 10.1021/jo802101a] [Citation(s) in RCA: 87] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Masaru Okutani
- Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya 468-8503, Japan
| | - Yuji Mori
- Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya 468-8503, Japan
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22
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Ban HS, Onagi S, Uno M, Nabeyama W, Nakamura H. Allene as an Alternative Functional Group for Drug Design: Effect of CC Multiple Bonds Conjugated with Quinazolines on the Inhibition of EGFR Tyrosine Kinase. ChemMedChem 2008; 3:1094-103. [DOI: 10.1002/cmdc.200800073] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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23
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Maksay G, Fodor L, Bíró T, Avlonitis N, Calogeropoulou T. A 17beta-derivative of allopregnanolone is a neurosteroid antagonist at a cerebellar subpopulation of GABA A receptors with nanomolar affinity. Br J Pharmacol 2007; 151:1078-86. [PMID: 17558438 PMCID: PMC2042931 DOI: 10.1038/sj.bjp.0707316] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND AND PURPOSE High-affinity, subtype-selective antagonists of the neurosteroid binding sites of GABA(A) receptors are not available. We have characterized an allopregnanolone derivative as an antagonist of cerebellar GABA(A) receptors with nanomolar affinity. EXPERIMENTAL APPROACH Receptor binding and electrophysiological methods were used for the allosteric modulation of cerebellar GABA(A) receptors by an allopregnanolone derivative, (20R)-17beta-(1-hydroxy-2,3-butadienyl)-5alpha-androstane-3alpha-ol (HBAO). GABA(A) receptors of rat cerebellar membranes were labelled with the chloride channel blocker [(3)H]ethynylbicycloorthobenzoate (EBOB). The ionophore function of GABA(A) receptors was studied by whole-cell patch clamp electrophysiology in cultured rat cerebellar granule and cortical cells. KEY RESULTS Partial displacement of cerebellar [(3)H]EBOB binding by nanomolar HBAO was attenuated by 0.1 mM furosemide, an antagonist of alpha(6) and beta(2-3) subunit-containing GABA(A) receptors. Displacement curves of HBAO were reshaped by 30 nM GABA and shifted to the right. However, the micromolar potency of full displacement by allopregnanolone was not affected by 0.1 mM furosemide or 30 nM GABA. The nanomolar, but not the micromolar phase of displacement of [(3)H]EBOB binding by GABA was attenuated by 100 nM HBAO. Submicromolar HBAO did not affect [(3)H]EBOB binding to cortical and hippocampal GABA(A) receptors. HBAO up to 1 microM did not affect chloride currents elicited by 0.3-10 microM GABA, while it abolished potentiation by 1 microM allopregnanolone with nanomolar potency in cerebellar but not in cortical cells. Furosemide attenuated cerebellar inhibition by 100 nM HBAO. CONCLUSIONS AND IMPLICATIONS HBAO is a selective antagonist of allopregnanolone, a major endogenous positive modulator via neurosteroid sites of cerebellar (probably alpha(6)beta(2-3)delta) GABA(A) receptors.
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Affiliation(s)
- G Maksay
- Department of Molecular Pharmacology, Institute of Biomolecular Chemistry, Chemical Research Centre, Hungarian Academy of Sciences, H-1525 Budapest, Hungary.
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Abstract
This article reviews the progress in the chemistry of the steroids that was published between January and December 2005. The reactions and partial synthesis of estrogens, androgens, pregnanes, bile acid derivatives, cholestanes and vitamin D analogues are covered. There are 139 references.
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Affiliation(s)
- James R Hanson
- Department of Chemistry, University of Sussex, Brighton, Sussex BN1 9QJ, UK
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