1
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Bagherinejad A, Alizadeh A. A review of the synthetic strategies toward spirobarbiturate-fused 3- to 7-membered rings. Org Biomol Chem 2022; 20:7188-7215. [PMID: 36070341 DOI: 10.1039/d2ob01326f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Spiro-connected hexahydropyrimidine-2,4,6-trione heterocyclic rings have received increasing attention from the viewpoint of biological activity and synthetic methods due to the importance of the rigid heterocyclic system and unique orientation of the functional substituents. Since 1900, numerous studies have exploited the synthesis of various spirobarbiturate-fused carbo- and heterocycles by applying different strategies. Due to the importance of barbiturate-based olefins as activated alkenes, these substrates have been utilized in many reactions. In addition, the nucleophilic addition of 1,3-disubstituted barbituric acid to different electrophiles has been applied to prepare highly functionalized spirobarbiturate scaffolds. This short review highlights various strategies for synthesizing spirobarbiturate-fused 3- to 7-membered carbo- and heterocyclic rings and some catalytic diastereoselective and enantioselective chemical reactions to access chiral compounds. The sections are divided by the incorporation of 3- to 7-membered heterocyclic or carbocyclic rings into a spirobarbiturate scaffold, and are presented in different subsections depending on the mechanistic details.
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Affiliation(s)
- Akram Bagherinejad
- Department of Chemistry, Tarbiat Modares University, P.O. Box 14115-175, Tehran, Iran.
| | - Abdolali Alizadeh
- Department of Chemistry, Tarbiat Modares University, P.O. Box 14115-175, Tehran, Iran.
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2
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Guerrab W, Akachar J, Jemli ME, Abudunia AM, Ouaabou R, Alaoui K, Ibrahimi A, Ramli Y. Synthesis, molecular docking, ADMET evaluation and in vitro cytotoxic activity evaluation on RD and L20B cell lines of 3-substituted 5,5-diphenylimidazolidine-2,4-dione derivatives. J Biomol Struct Dyn 2022:1-9. [DOI: 10.1080/07391102.2022.2069865] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Walid Guerrab
- Laboratory of Medicinal Chemistry, Drug Sciences Research Center, Faculty of Medicine and Pharmacy, Mohammed V University in Rabat, Morocco
| | - Jihane Akachar
- Biotechnology Laboratory, Faculty of Medicine and Pharmacy, Mohammed V University, Morocco
| | - Meryem El Jemli
- Laboratory of Pharmacology and Toxicology, Faculty of Medicine and Pharmacy, Mohammed V University, Morocco
| | - Abdul-Malik Abudunia
- Biotechnology Laboratory, Faculty of Medicine and Pharmacy, Mohammed V University, Morocco
| | - Rachida Ouaabou
- LICVEDDE/ERIDDECV (Research Team of Innovation and Sustainable Development & Expertise in Green Chemistry), Faculty of Science Semlalia, Cadi Ayyad University, Marrakesh, Morocco
| | - Katim Alaoui
- Laboratory of Pharmacology and Toxicology, Faculty of Medicine and Pharmacy, Mohammed V University, Morocco
| | - Azeddine Ibrahimi
- Biotechnology Laboratory, Faculty of Medicine and Pharmacy, Mohammed V University, Morocco
| | - Youssef Ramli
- Laboratory of Medicinal Chemistry, Drug Sciences Research Center, Faculty of Medicine and Pharmacy, Mohammed V University in Rabat, Morocco
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3
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Zhai JS, Du DM. Bifunctional thiourea-catalyzed asymmetric [3 + 2] annulation reactions of 2-isothiocyanato-1-indanones with barbiturate-based olefins. Beilstein J Org Chem 2022; 18:25-36. [PMID: 35047080 PMCID: PMC8744461 DOI: 10.3762/bjoc.18.3] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Accepted: 12/13/2021] [Indexed: 12/31/2022] Open
Abstract
Bifunctional thiourea-catalyzed asymmetric [3 + 2] annulation reactions of 2-isothiocyanato-1-indanones with barbiturate-based olefins have been developed to afford chiral dispiro[indene-pyrrolidine-pyrimidine]s. Through this strategy, the target products could be obtained in good to excellent yields with excellent stereoselectivities. In addition, the synthetic utility was verified through a gram-scale synthesis, one-pot three-component reactions and further transformation experiments of the products.
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Affiliation(s)
- Jiang-Song Zhai
- School of Chemistry and Chemical Engineering, Beijing Institute of Technology, No.5 Zhongguancun South Street, Beijing 100081, People’s Republic of China
| | - Da-Ming Du
- School of Chemistry and Chemical Engineering, Beijing Institute of Technology, No.5 Zhongguancun South Street, Beijing 100081, People’s Republic of China
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4
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Direct access to spirocycles by Pd/WingPhos-catalyzed enantioselective cycloaddition of 1,3-enynes. Nat Commun 2021; 12:5667. [PMID: 34580311 PMCID: PMC8476582 DOI: 10.1038/s41467-021-25981-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Accepted: 09/10/2021] [Indexed: 11/17/2022] Open
Abstract
Spirocycles play an important role in drug discovery and development. The direct, catalytic, and enantioselective synthesis of spirocycles from readily available starting materials and in an atom economic manner remains a highly sought-after task in organic synthesis. Herein, an enantioselective Pd-hydride-catalyzed cycloaddition method for the synthesis of spirocyclic compounds directly from two classes of commonly available starting materials, 1,3-enynes and cyclic carbon−hydrogen (C−H) bonds, is reported. The reactions employ a chiral Pd/WingPhos catalyst to both suppress the formation of bis-allenyl by-products and control the stereoselectivity. 1,3-Enynes are used as dielectrophilic four-carbon units in the cycloaddition reactions, which also enables an enyne substrate-directed enantioselectivity switch with good levels of stereocontrol. The present spirocycle synthesis tolerates a broad range of functional groups of 1,3-enyne substrates, including alcohols, esters, nitriles, halides, and olefins. A variety of diverse cyclic nucleophiles, including pharmaceutically important heterocycles and carbocycles, can be flexibly incorporated with spiro scaffolds. Spirocycles are traditionally difficult structures to synthesize due to the congested nature of the central atom. Here the authors show a method to synthesize quaternary carbon spirocycles in one step from 1,3-enynes and pyrazolidine-type heterocycles, both relatively unactivated structures, proceeding via palladium catalysis.
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5
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Kalník M, Gabko P, Bella M, Koóš M. The Bucherer-Bergs Multicomponent Synthesis of Hydantoins-Excellence in Simplicity. Molecules 2021; 26:4024. [PMID: 34209381 PMCID: PMC8271528 DOI: 10.3390/molecules26134024] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 06/20/2021] [Accepted: 06/24/2021] [Indexed: 12/02/2022] Open
Abstract
Hydantoins and their hybrids with other molecules represent a very important group of heterocycles because they exhibit diverse biological and pharmacological activities in medicinal and agrochemical applications. They also serve as key precursors in the chemical or enzymatic synthesis of significant nonnatural α-amino acids and their conjugates with medical potential. This review provides a comprehensive treatment of the synthesis of hydantoins via the Bucherer-Bergs reaction including the Hoyer modification but limited to free carbonyl compounds or carbonyl compounds protected as acetals (ketals) and cyanohydrins used as starting reaction components. In this respect, the Bucherer-Bergs reaction provides an efficient and simple method in the synthesis of important natural products as well as for the preparation of new organic compounds applicable as potential therapeutics. The scope and limitations, as well as a comparison with some other methods for preparing hydantoins, are also discussed.
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Affiliation(s)
| | | | | | - Miroslav Koóš
- Institute of Chemistry, Center for Glycomics, Slovak Academy of Sciences, Dúbravská cesta 9, SK-845 38 Bratislava, Slovakia; (M.K.); (P.G.); (M.B.)
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6
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Bobrovskaya OV, Russkih AA, Yankin AN, Dmitriev MV, Bunev AS, Gein VL. Straightforward synthesis of novel spiroether derivatives. SYNTHETIC COMMUN 2021. [DOI: 10.1080/00397911.2021.1903930] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
| | | | - Andrei N. Yankin
- Department of Physics and Engineering, ITMO University, St. Petersburg, Russia
| | - Maksim V. Dmitriev
- Department of Chemistry, Perm State National Research University, Perm, Russia
| | - Aleksandr S. Bunev
- Medicinal Chemistry Center, Togliatti State University, Togliatti, Russia
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7
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Regioselective synthesis of spirobarbiturate-dihydrofurans and dihydrofuro[2,3-d]pyrimidines via one-pot cascade reaction of barbiturate-based olefins and ethyl acetoacetate. Tetrahedron 2021. [DOI: 10.1016/j.tet.2020.131859] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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8
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Noroozi Pesyan N, Rashidnejad H, Esmaeili MA, Safari E, Tunç T, Alilou M, Safavi‐Sohi R, Şahin E. 4‐Methyl
morpholinium bis‐(thio)barbiturates: Synthesis, structure, anticancer evaluation, and
CoMFA
study. J CHIN CHEM SOC-TAIP 2020. [DOI: 10.1002/jccs.202000057] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Nader Noroozi Pesyan
- Department of Organic Chemistry, Faculty of Chemistry Urmia University Urmia Iran
| | - Hamid Rashidnejad
- Department of Organic Chemistry, Faculty of Chemistry Urmia University Urmia Iran
| | - Mohammad Ali Esmaeili
- Department of Biology Medicinal Plants and Drugs Research Institute, Shahid Beheshti University Tehran Iran
| | - Elnaz Safari
- Department of Organic Chemistry, Faculty of Chemistry Urmia University Urmia Iran
| | - Tuncay Tunç
- Department of Science Education, Faculty of Education Aksaray University Aksaray Turkey
| | - Mostafa Alilou
- Institute of Pharmacy, Pharmacognosy University of Innsbruck Innsbruck Austria
| | - Reihaneh Safavi‐Sohi
- Department of Phytochemistry Medicinal Plants and Drug Research Institute, Shahid Beheshti University Tehran Iran
| | - Ertan Şahin
- Department of Chemistry, Faculty of Science Atatürk University Erzurum Turkey
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9
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Facile catalyst-free synthesis of perfluoroalkylated cis-spiropyrimidine-5,1′-quinolizines and pyrano[2,3-d]pyrimidines. J Fluor Chem 2019. [DOI: 10.1016/j.jfluchem.2019.109411] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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10
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An T, Du D. Chiral Squaramide Catalyzed Asymmetric [3+2] Cycloaddition Reaction for Synthesis of Trifluoromethylated Barbituric Acid Derivatives. ChemistrySelect 2019. [DOI: 10.1002/slct.201903146] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Tian‐Li An
- School of Chemistry and Chemical EngineeringBeijing Institute of Technology 5 South Zhongguancun Street Beijing 100081 P. R. China
| | - Da‐Ming Du
- School of Chemistry and Chemical EngineeringBeijing Institute of Technology 5 South Zhongguancun Street Beijing 100081 P. R. China
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11
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Yan X, Shao P, Song X, Zhang C, Lu C, Liu S, Li Y. Chemoselective syntheses of spirodihydrofuryl and spirocyclopropyl barbiturates via cascade reactions of barbiturate-based olefins and acetylacetone. Org Biomol Chem 2019; 17:2684-2690. [PMID: 30768085 DOI: 10.1039/c9ob00004f] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The Michael addition initiated ring closure reaction of barbiturate-based olefins and acetylacetone with NBS has been explored. The efficient and chemoselective approach for the synthesis of barbiturate-fused spirocycles was established. Spirodihydrofuryl barbiturates and spirocyclopropyl barbiturates were synthesized selectively via cascade reactions under different basic conditions in moderate to excellent yields. The structure of 2-(4-chlorophenyl)-1,1-diacetyl-5,7-dimethyl-5,7-diazaspiro[2,5]octane-4,6,8-trione was confirmed by single crystal X-ray diffraction analysis.
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Affiliation(s)
- Xuebin Yan
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, P. R. China.
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12
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Abstract
Since the beginning of the 20th century, numerous research efforts made elegant use of barbituric acid derivatives as building blocks for the elaboration of more complex and useful molecules in the field of pharmaceutical chemistry and material sciences. However, the construction of chiral scaffolds by the catalytic enantioselective transformation of barbituric acid and derivatives has only emerged recently. The specific properties of these rather planar scaffolds, which also encompass either a high Brønsted acidity concerning the native barbituric acid or the marked electrophilic character of alkylidene barbituric acids, required specific developments to achieve efficient asymmetric processes. This review covers the enantioselective catalytic reactions developed for barbituric acid platforms using an organocatalytic and metal-based enantioselective sequences. These achievements currently allow several unique addition and annulation reactions towards the construction of high valued chiral heterocycles from barbituric acid derivatives along with innovative enantioselective developments.
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13
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Nayak S, Panda P, Raiguru BP, Mohapatra S, Purohit CS. Base mediated green synthesis of enantiopure 2-C-spiro-glycosyl-3-nitrochromenes. Org Biomol Chem 2018; 17:74-82. [PMID: 30478467 DOI: 10.1039/c8ob02278j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
A novel green synthetic methodology has been developed to obtain enantiopure (2S)-2-C-spiro-glycosyl-3-nitrochromenes following the oxa-Michael-aldol condensation reaction of sugar derived 3-C-vinyl nitro olefins with substituted salicylaldehydes using Et3N as a base under neat conditions at rt-40 °C. The stereochemistry of the product is confirmed by a single crystal X-ray study. Several advantages are associated with this protocol such as cost effectiveness, easy accessibility, short reaction time, high yields, wide substrate scope and high enantiopurity.
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Affiliation(s)
- Sabita Nayak
- Department of Chemistry, Ravenshaw University, Cuttack, Odisha, India.
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14
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First diastereoselective synthesis of perfluoroalkylated cis-spiropyrido[2,1-a]isoquinoline-1,5’-pyrimidines. J Fluor Chem 2018. [DOI: 10.1016/j.jfluchem.2018.09.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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15
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Kotha S, Sreevani G. Synthesis of benzyl halide derivatives of spirohydantoins via [2+2+2] cyclotrimerization reaction. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.04.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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16
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Frankowski S, Gajda T, Albrecht Ł. Isothiocyanate Strategy for the Synthesis of Quaternary α-Amino Acids Bearing a Spirocyclic Ring System. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201701642] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Sebastian Frankowski
- Institute of Organic Chemistry; Department of Chemistry; Lodz University of Technology; Zeromskiego 116, 90-924 Łódź Poland
| | - Tadeusz Gajda
- Institute of Organic Chemistry; Department of Chemistry; Lodz University of Technology; Zeromskiego 116, 90-924 Łódź Poland
| | - Łukasz Albrecht
- Institute of Organic Chemistry; Department of Chemistry; Lodz University of Technology; Zeromskiego 116, 90-924 Łódź Poland
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17
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Hunter AC, Schlitzer SC, Stevens JC, Almutwalli B, Sharma I. A Convergent Approach to Diverse Spiroethers through Stereoselective Trapping of Rhodium Carbenoids with Gold-Activated Alkynols. J Org Chem 2018; 83:2744-2752. [DOI: 10.1021/acs.joc.7b03196] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Arianne C. Hunter
- Department of Chemistry and
Biochemistry, and Institute of Natural Products Applications and Research
Technologies, University of Oklahoma, 101 Stephenson Parkway, Norman, Oklahoma 73071,United States
| | - Steven C. Schlitzer
- Department of Chemistry and
Biochemistry, and Institute of Natural Products Applications and Research
Technologies, University of Oklahoma, 101 Stephenson Parkway, Norman, Oklahoma 73071,United States
| | - Joseph C. Stevens
- Department of Chemistry and
Biochemistry, and Institute of Natural Products Applications and Research
Technologies, University of Oklahoma, 101 Stephenson Parkway, Norman, Oklahoma 73071,United States
| | - Bilal Almutwalli
- Department of Chemistry and
Biochemistry, and Institute of Natural Products Applications and Research
Technologies, University of Oklahoma, 101 Stephenson Parkway, Norman, Oklahoma 73071,United States
| | - Indrajeet Sharma
- Department of Chemistry and
Biochemistry, and Institute of Natural Products Applications and Research
Technologies, University of Oklahoma, 101 Stephenson Parkway, Norman, Oklahoma 73071,United States
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18
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Chen C, Xu L, Wang L, Li SS. Efficient construction of tetrahydroquinolines via fluorinated alcohol mediated cascade [1,5]-hydride transfer/cyclization. Org Biomol Chem 2018; 16:7109-7114. [DOI: 10.1039/c8ob02012d] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
An environmentally benign cascade redox-neutral process was developed for the efficient construction of pharmaceutically important spirocyclic tetrahydroquinolines via a 3-step cascade Knoevenagel condensation/[1,5]-hydride transfer/cyclization.
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Affiliation(s)
- Chunqi Chen
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao 266109
- China
| | - Lubin Xu
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao 266109
- China
| | - Liang Wang
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao 266109
- China
| | - Shuai-Shuai Li
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao 266109
- China
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19
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Synthesis of Spironucleosides: Past and Future Perspectives. Molecules 2017; 22:molecules22112028. [PMID: 29165398 PMCID: PMC6150341 DOI: 10.3390/molecules22112028] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Revised: 11/17/2017] [Accepted: 11/19/2017] [Indexed: 01/23/2023] Open
Abstract
Spironucleosides are a type of conformationally restricted nucleoside analogs in which the anomeric carbon belongs simultaneously to the sugar moiety and to the base unit. This locks the nucleic base in a specific orientation around the N-glycosidic bond, imposing restrictions on the flexibility of the sugar moiety. Anomeric spiro-functionalized nucleosides have gained considerable importance with the discovery of hydantocidin, a natural spironucleoside isolated from fermentation broths of Streptomyces hygroscopicus which exhibits potent herbicidal activity. The biological activity of hydantocidin has prompted considerable synthetic interest in this nucleoside and also in a variety of analogues, since important pharmaceutical leads can be found among modified nucleoside analogues. We present here an overview of the most important advances in the synthesis of spironucleosides.
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20
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Gao X, Li Z, Yang W, Liu Y, Chen W, Zhang C, Zheng L, Guo H. Phosphine-catalyzed [3 + 2] and [4 + 2] annulation reactions of ynones with barbiturate-derived alkenes. Org Biomol Chem 2017; 15:5298-5307. [DOI: 10.1039/c7ob01034f] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The phosphine-catalyzed [3 + 2] annulation reaction of ynones and barbiturate-derived alkenes has been developed with the assistance of a weak acid, giving functionalized spirobarbiturate-cyclopentanones.
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Affiliation(s)
- Xing Gao
- Department of Applied Chemistry
- China Agricultural University
- Beijing 100193
- China
| | - Zhen Li
- Department of Applied Chemistry
- China Agricultural University
- Beijing 100193
- China
| | - Wenjun Yang
- Department of Applied Chemistry
- China Agricultural University
- Beijing 100193
- China
| | - Yang Liu
- Department of Applied Chemistry
- China Agricultural University
- Beijing 100193
- China
| | - Wufeng Chen
- Department of Applied Chemistry
- China Agricultural University
- Beijing 100193
- China
| | - Cheng Zhang
- Department of Applied Chemistry
- China Agricultural University
- Beijing 100193
- China
| | - Lufei Zheng
- Institute of Quality Standards & Testing Technology for Agro-Products
- Chinese Academy of Agricultural Sciences
- Beijing 100081
- China
| | - Hongchao Guo
- Department of Applied Chemistry
- China Agricultural University
- Beijing 100193
- China
- Key Laboratory of Green Pesticide and Agricultural Bioengineering
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21
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Vavsari VF, Ziarani GM, Balalaie S, Latifi A, Karimi M, Badiei A. New functionalized 8-hydroxyquinoline-5-sulfonic acid mesoporous silica (HQS-SBA-15) as an efficient catalyst for the synthesis of 2-thiohydantoin derivatives. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.07.034] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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22
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Liu Y, Yang W, Wu Y, Mao B, Gao X, Liu H, Sun Z, Xiao Y, Guo H. Asymmetric Construction of Highly Functionalized Spirobarbiturate-Cyclopentenes through Chiral Phosphine-Catalyzed [3+2] Annulation of Morita-Baylis-Hillman Carbonates with Barbiturate-Derived Alkenes. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600450] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Yang Liu
- Department of Applied Chemistry; China Agricultural University; 2 West Yuanmingyuan Road Beijing 100193 People's Republic of China
| | - Wenjun Yang
- Department of Applied Chemistry; China Agricultural University; 2 West Yuanmingyuan Road Beijing 100193 People's Republic of China
| | - Yang Wu
- Department of Applied Chemistry; China Agricultural University; 2 West Yuanmingyuan Road Beijing 100193 People's Republic of China
| | - Biming Mao
- Department of Applied Chemistry; China Agricultural University; 2 West Yuanmingyuan Road Beijing 100193 People's Republic of China
| | - Xing Gao
- Department of Applied Chemistry; China Agricultural University; 2 West Yuanmingyuan Road Beijing 100193 People's Republic of China
| | - Honglei Liu
- Department of Applied Chemistry; China Agricultural University; 2 West Yuanmingyuan Road Beijing 100193 People's Republic of China
| | - Zhanhu Sun
- Department of Applied Chemistry; China Agricultural University; 2 West Yuanmingyuan Road Beijing 100193 People's Republic of China
| | - Yumei Xiao
- Department of Applied Chemistry; China Agricultural University; 2 West Yuanmingyuan Road Beijing 100193 People's Republic of China
| | - Hongchao Guo
- Department of Applied Chemistry; China Agricultural University; 2 West Yuanmingyuan Road Beijing 100193 People's Republic of China
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23
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Zhao HW, Tian T, Pang HL, Li B, Chen XQ, Yang Z, Meng W, Song XQ, Zhao YD, Liu YY. Organocatalytic [3+2] Cycloadditions of Barbiturate-Based Olefins with 3-Isothiocyanato Oxindoles: Highly Diastereoselective and Enantioselective Synthesis of Dispirobarbiturates. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600270] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Hong-Wu Zhao
- College of Life Science and Bio-engineering; Beijing University of Technology; Beijing 100124 People's Republic of China
| | - Ting Tian
- College of Life Science and Bio-engineering; Beijing University of Technology; Beijing 100124 People's Republic of China
| | - Hai-Liang Pang
- College of Life Science and Bio-engineering; Beijing University of Technology; Beijing 100124 People's Republic of China
| | - Bo Li
- College of Life Science and Bio-engineering; Beijing University of Technology; Beijing 100124 People's Republic of China
| | - Xiao-Qin Chen
- College of Life Science and Bio-engineering; Beijing University of Technology; Beijing 100124 People's Republic of China
| | - Zhao Yang
- College of Life Science and Bio-engineering; Beijing University of Technology; Beijing 100124 People's Republic of China
| | - Wei Meng
- College of Life Science and Bio-engineering; Beijing University of Technology; Beijing 100124 People's Republic of China
| | - Xiu-Qing Song
- College of Life Science and Bio-engineering; Beijing University of Technology; Beijing 100124 People's Republic of China
| | - Yu-Di Zhao
- College of Life Science and Bio-engineering; Beijing University of Technology; Beijing 100124 People's Republic of China
| | - Yue-Yang Liu
- College of Life Science and Bio-engineering; Beijing University of Technology; Beijing 100124 People's Republic of China
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24
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Facile and efficient approach for the synthesis of spirocyclopropylbarbiturates and 3-substituted-1,1,2,2-tetracyanocyclopropanes using N-halosulfonamides. Mol Divers 2016; 20:907-917. [PMID: 27295185 DOI: 10.1007/s11030-016-9682-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Accepted: 05/22/2016] [Indexed: 10/21/2022]
Abstract
The applications of [Formula: see text]-tetrabromobenzene-1,3-disulfonamide [TBBDA], poly(N-bromo-N-ethyl-benzene-1,3-disulfonamide) [PBBS], [Formula: see text]-tetrachlorobenzene-1,3-disulfonamide [TCBDA], and poly(N-chloro-N-ethyl-benzene-1,3-disulfonamide) [PCBS] as novel reagents for the preparation of spirocyclopropylbarbiturates from 2-arylidenemalononitriles and barbituric acids are described. In addition, an effective and simple domino procedure for the synthesis of 3-substituted-1,1,2,2-tetracyanocyclopropanes from carbonyl compounds and malononitrile in a one-pot manner is reported. These reactions involve Michael addition, halogenation, and intramolecular ring-closing (MHIRC) reaction sequences. We have developed an efficient procedure for the synthesis of spirocyclopropylbarbiturates and 3-substituted-1,1,2,2-tetracyanocyclopropanes using TBBDA, PBBS, TCBDA, and PCBS as new reagents.
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25
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Liu H, Liu Y, Yuan C, Wang GP, Zhu SF, Wu Y, Wang B, Sun Z, Xiao Y, Zhou QL, Guo H. Enantioselective Synthesis of Spirobarbiturate-Cyclohexenes through Phosphine-Catalyzed Asymmetric [4 + 2] Annulation of Barbiturate-Derived Alkenes with Allenoates. Org Lett 2016; 18:1302-5. [DOI: 10.1021/acs.orglett.6b00239] [Citation(s) in RCA: 83] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Honglei Liu
- Department
of Applied Chemistry, China Agricultural University, Beijing 100193, P. R. China
| | - Yang Liu
- Department
of Applied Chemistry, China Agricultural University, Beijing 100193, P. R. China
| | - Chunhao Yuan
- Department
of Applied Chemistry, China Agricultural University, Beijing 100193, P. R. China
| | - Guo-Peng Wang
- State
Key Laboratory and Institute of Elemento-Organic Chemistry, Collaborative
Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071, China
| | - Shou-Fei Zhu
- State
Key Laboratory and Institute of Elemento-Organic Chemistry, Collaborative
Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071, China
| | - Yang Wu
- Department
of Applied Chemistry, China Agricultural University, Beijing 100193, P. R. China
| | - Bo Wang
- Department
of Applied Chemistry, China Agricultural University, Beijing 100193, P. R. China
| | - Zhanhu Sun
- Department
of Applied Chemistry, China Agricultural University, Beijing 100193, P. R. China
| | - Yumei Xiao
- Department
of Applied Chemistry, China Agricultural University, Beijing 100193, P. R. China
| | - Qi-Lin Zhou
- State
Key Laboratory and Institute of Elemento-Organic Chemistry, Collaborative
Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071, China
| | - Hongchao Guo
- Department
of Applied Chemistry, China Agricultural University, Beijing 100193, P. R. China
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26
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Bera S, Chatterjee B, Mondal D. Construction of quaternary stereocentres on carbohydrate scaffolds. RSC Adv 2016. [DOI: 10.1039/c6ra13898e] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
This review describes a glimpse of the various strategies for constructing stereo-defined quaternary centres in densely functionalised carbohydrates moiety of structurally intriguing and biologically potent natural products and building blocks.
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Affiliation(s)
- Smritilekha Bera
- School of Chemical Sciences
- Central University of Gujarat
- Gandhinagar-382030
- India
| | | | - Dhananjoy Mondal
- School of Chemical Sciences
- Central University of Gujarat
- Gandhinagar-382030
- India
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27
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Zhao HW, Tian T, Li B, Yang Z, Pang HL, Meng W, Song XQ, Chen XQ. Diastereoselective Synthesis of Dispirobarbiturates through Et3N-Catalyzed [3 + 2] Cycloaddition of Barbiturate-Based Olefins with 3-Isothiocyanato Oxindoles. J Org Chem 2015; 80:10380-5. [DOI: 10.1021/acs.joc.5b01810] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Hong-Wu Zhao
- College
of Life Science and
Bio-engineering, Beijing University of Technology, Beijing 100124, P. R. China
| | - Ting Tian
- College
of Life Science and
Bio-engineering, Beijing University of Technology, Beijing 100124, P. R. China
| | - Bo Li
- College
of Life Science and
Bio-engineering, Beijing University of Technology, Beijing 100124, P. R. China
| | - Zhao Yang
- College
of Life Science and
Bio-engineering, Beijing University of Technology, Beijing 100124, P. R. China
| | - Hai-Liang Pang
- College
of Life Science and
Bio-engineering, Beijing University of Technology, Beijing 100124, P. R. China
| | - Wei Meng
- College
of Life Science and
Bio-engineering, Beijing University of Technology, Beijing 100124, P. R. China
| | - Xiu-Qing Song
- College
of Life Science and
Bio-engineering, Beijing University of Technology, Beijing 100124, P. R. China
| | - Xiao-Qin Chen
- College
of Life Science and
Bio-engineering, Beijing University of Technology, Beijing 100124, P. R. China
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28
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Alizadeh A, Khodaei MM, Fakhari M, Abdi G, Ghouzivand S. Chemo and regioselective serendipitous electrochemically initiated spirocyclization of caffeic acid esters with barbituric acid derivatives. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.08.014] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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29
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De Crescentini L, Attanasi OA, Campisi LA, Favi G, Lillini S, Ursini F, Mantellini F. Double Michael addition/aza-cyclization: a valuable sequence for the construction of symmetrical and unsymmetrical spirobarbiturate-pyridines. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.04.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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30
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Kotha S, Ali R. Diversity Oriented Approach to Spirobarbituric Acid Derivatives via a [2+2+2] Cycloaddition and Diels‒Alder Reaction as Key Steps. HETEROCYCLES 2014. [DOI: 10.3987/com-13-s(s)48] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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31
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Jalilzadeh M, Pesyan NN. One-pot Four Component Reaction of Unsymmetrical 1-Methylbarbituric Acid with BrCN and Various Aldehydes in the Presence of Et3N and/or Pyridine. JOURNAL OF THE KOREAN CHEMICAL SOCIETY-DAEHAN HWAHAK HOE JEE 2011. [DOI: 10.5012/jkcs.2011.55.6.940] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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32
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Hosseini Y, Rastgar S, Heren Z, Büyükgüngörc O, Pesyan NN. One-pot New Barbituric Acid Derivatives Derived from the Reaction of Barbituric Acids with BrCN and Ketones. J CHIN CHEM SOC-TAIP 2011. [DOI: 10.1002/jccs.201190031] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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33
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Han J, Wang J, Dong H, Lei J, Wang M, Fang J. Synthesis and herbicidal activity of 5-(4-hydroxybenzyl)-2-thioxoimidazolidin-4-one esters. Molecules 2011; 16:2833-45. [PMID: 21455096 PMCID: PMC6260616 DOI: 10.3390/molecules16042833] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2011] [Revised: 03/16/2011] [Accepted: 03/25/2011] [Indexed: 11/20/2022] Open
Abstract
A series of novel 5-(4-hydroxybenzyl)-2-thioxoimidazolidin-4-one esters were synthesized under mild conditions by the reaction of 5-(4-hydroxybenzyl)-2-thioxoimidazolidin-4-one and carboxylic acids with DCC and DMAP as the promoters. Their structures were confirmed by 1H-NMR, IR, ESI-MS and elemental analysis. The preliminary bioassy results indicated that some of compounds exhibit good herbicidal activity against Zea mays, Triticum aestivum and Arabidopsis thaliana. The further greenhouse test showed that compounds 6-16 and 6-28 have 60%, 50% and 50% efficacy against Stellaria media, Echinochloa crus-galli and Setaria viridis at 1,000 g/ha, respectively.
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Affiliation(s)
- Jintao Han
- Department of Applied Chemistry, China Agricultural University, Beijing 100193, China
| | - Jinmin Wang
- Department of Applied Chemistry, China Agricultural University, Beijing 100193, China
| | - Hongbo Dong
- Department of Applied Chemistry, China Agricultural University, Beijing 100193, China
| | | | - Mingan Wang
- Department of Applied Chemistry, China Agricultural University, Beijing 100193, China
- State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +86-10-62734093
| | - Jianxin Fang
- State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China
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Jalilzadeh M, Noroozi Pesyan N, Rezaee F, Rastgar S, Hosseini Y, Sahin E. New one-pot synthesis of spiro[furo[2,3-d]pyrimidine-6,5'-pyrimidine]pentaones and their sulfur analogues. Mol Divers 2011; 15:721-31. [PMID: 21279439 DOI: 10.1007/s11030-011-9302-9] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2010] [Accepted: 01/05/2011] [Indexed: 11/30/2022]
Abstract
Reaction of barbituric acid (BA), 1,3-dimethyl barbituric acid (DMBA) and 2-thiobarbituric acid (TBA) with cyanogen bromide and various aldehydes in presence of triethylamine afforded a new class of heterocyclic stable 5-alkyl and/or 5-aryl-1H, 1'H-spiro[furo[2,3-d]pyrimidine-6,5'-pyrimidine]2,2',4,4',6'(3H,3'H,5H)-pentaones which are dimeric forms of barbiturate (uracil and thiouracil derivatives) at 0 °C to ambient temperatures. Structure elucidation is proved by X-ray crystallography, (1)H NMR, (13)C NMR, FT-IR, CHN and mass analyses techniques. Mechanisms of the formations are discussed.
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Affiliation(s)
- Mohammad Jalilzadeh
- Department of Chemistry, Faculty of Science, Urmia University, 57159 Urmia, Iran
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35
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Enderlin G, Taillefumier C, Didierjean C, Chapleur Y. An Efficient Route to Acyclic C-Nucleosides and Fused-Ring Analogues of Uridine from exo-Glycals. J Org Chem 2009; 74:8388-91. [DOI: 10.1021/jo901604w] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Gérald Enderlin
- UMR SRSMC 7565 Nancy-Université CNRS, Groupe SUCRES, BP 239, F-54506 Vandoeuvre, France
| | - Claude Taillefumier
- UMR SRSMC 7565 Nancy-Université CNRS, Groupe SUCRES, BP 239, F-54506 Vandoeuvre, France
- UMR SESSIB, Université Blaise Pascal Clermont II, CNRS, F-63000 Clermont-Ferrand, France
| | - Claude Didierjean
- UMR LCM3B 7036, Nancy-Université CNRS, BP 239, F-54506 Vandoeuvre, France
| | - Yves Chapleur
- UMR SRSMC 7565 Nancy-Université CNRS, Groupe SUCRES, BP 239, F-54506 Vandoeuvre, France
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36
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Gasch C, Illangua JM, Merino-Montiel P, Fuentes J. Stereocontrolled synthesis of (5+5), (5+6) and (6+6) 3-spiropseudonucleosides. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.03.038] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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37
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Behera RK, Behera AK, Pradhan R, Pati A, Patra M. Studies on Spiroheterocycles, Part III: Synthesis of Diazaspiroundecanetetraone Derivatives Containing Biologically Active Heterocycles. PHOSPHORUS SULFUR 2009. [DOI: 10.1080/10426500802274260] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Rajani K. Behera
- a Organic Synthesis Laboratory, Department of Chemistry , Sambalpur University , Burla, Orissa, India
| | - Ajay K. Behera
- a Organic Synthesis Laboratory, Department of Chemistry , Sambalpur University , Burla, Orissa, India
| | - Rosy Pradhan
- a Organic Synthesis Laboratory, Department of Chemistry , Sambalpur University , Burla, Orissa, India
| | - Anita Pati
- a Organic Synthesis Laboratory, Department of Chemistry , Sambalpur University , Burla, Orissa, India
| | - Manabendra Patra
- a Organic Synthesis Laboratory, Department of Chemistry , Sambalpur University , Burla, Orissa, India
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39
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Lomlim L, Einsiedel J, Heinemann FW, Meyer K, Gmeiner P. Proline derived spirobarbiturates as highly effective beta-turn mimetics incorporating polar and functionalizable constraint elements. J Org Chem 2008; 73:3608-11. [PMID: 18363364 DOI: 10.1021/jo702573z] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A practical and efficient synthesis of spirobarbiturates of type III is reported when NH acidity of the imide function of the hydrophilic linker element allowed the introduction of different substituents. Structural characterization, which was based on both X-ray crystallography and spectroscopic investigations, indicated type II beta-turn formation. Introduction of the molecular scaffold into solid phase peptide synthesis gave rise to spirocyclic neuropeptide analogs.
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Affiliation(s)
- Luelak Lomlim
- Department of Chemistry and Pharmacy, Emil Fischer Center, Friedrich Alexander University, Schuhstrasse 19, D-91052 Erlangen, Germany
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40
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Elhalem E, Comin MJ, Rodriguez JB. Synthesis of Conformationally Locked Carbocyclic Nucleosides Built on a Thiabicyclo[3.1.0]hexane System as a Pseudosugar Surrogate. European J Org Chem 2006. [DOI: 10.1002/ejoc.200600488] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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41
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Singh P, Paul K. A practical approach for spiro- and 5-monoalkylated barbituric acids. J Heterocycl Chem 2006. [DOI: 10.1002/jhet.5570430313] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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42
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44
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Chatgilialoglu C, Ferreri C, Gimisis T, Roberti M, Balzarini J, De Clercq E. Synthesis and biological evaluation of novel 1'-branched and spironucleoside analogues. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2005; 23:1565-81. [PMID: 15620096 DOI: 10.1081/ncn-200031391] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Novel anomeric spironucleosides and 1'-cyano-2',3'-didehydro-2',3'-dideoxyuridine, a structural analogue of known anti-HIV agents, were prepared by nucleophilic addition of organolithium reagents to 1'-cyano-2'-deoxy- and 1'-cyano-2'-deoxy-2'beta-bromo-uridine derivatives, respectively. The yield and distribution of products depended on the reaction conditions, which were studied in detail. Although none of the compounds exhibited antiviral activity, two compounds displayed cytostatic activity against both murine leukemia and human T-lymphocyte cells.
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46
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Babu BR, Keinicke L, Petersen M, Nielsen C, Wengel J. 2'-Spiro ribo- and arabinonucleosides: synthesis, molecular modelling and incorporation into oligodeoxynucleotides. Org Biomol Chem 2004; 1:3514-26. [PMID: 14599012 DOI: 10.1039/b306354b] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have synthesized four conformationally restricted bicyclic 2'-spiro nucleosides via 2'-C-allyl nucleosides as key intermediates. The ribo-configured 2'-spironucleosides 9b and 14b were obtained by a convergent strategy starting from 2-ketofuranose 1 whereas the arabino-configured 2'-spironucleosides 21 and 27 were obtained by a linear strategy with a 2'-ketouridine derivative as starting material. The furanose ring of 9b/14b adopts N-type conformations whereas the furanose ring of 21/27 exists as an N<==>S equilibrium. These compounds showed no anti-HIV-1 activity or cytotoxicity. Incorporation of the four 2'-spironucleosides (as monomers X4 and X5) into oligodeoxynucleotides was accomplished using the phosphoramidite approach on an automated DNA synthesizer. Irrespective of monomeric configuration, hybridization studies revealed that these 2'-spironucleotide monomers (X4 and X5) induce decreased duplex thermostabilities compared with the corresponding DNA:DNA and DNA:RNA duplexes. Molecular modelling indicated that steric constraints are a possible reason for the lowered binding affinities of the modified oligodeoxynucleotides towards complementary single-stranded DNA and single-stranded RNA complements.
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Affiliation(s)
- B Ravindra Babu
- Nucleic Acid Center, Department of Chemistry, University of Southern Denmark, DK-5230 Odense M, Denmark
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47
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Taillefumier C, Thielges S, Chapleur Y. Anomeric spiroannelated 1,4-diazepine 2,5-diones from furano exo-glycals: towards a new class of spironucleosides. Tetrahedron 2004. [DOI: 10.1016/j.tet.2004.01.030] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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48
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Paju A, Kanger T, Niitsoo O, Pehk T, Müürisepp AM, Lopp M. Asymmetric oxidation of 3-alkyl-1,2-cyclopentanediones. Part 3: Oxidative ring cleavage of 3-hydroxyethyl-1,2-cyclopentanediones: synthesis of α-hydroxy-γ-lactone acids and spiro-γ-dilactones. ACTA ACUST UNITED AC 2003. [DOI: 10.1016/s0957-4166(03)00452-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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49
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Trabocchi A, Menchi G, Rolla M, Machetti F, Bucelli I, Guarna A. Enantiospecific synthesis of 3-aza-6,8-dioxa-bicyclo[3.2.1]octane carboxylic acids from erythrose. Tetrahedron 2003. [DOI: 10.1016/s0040-4020(03)00773-7] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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50
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Meusel M, Ambrozak A, Hecker TK, Gütschow M. The aminobarbituric acid-hydantoin rearrangement. J Org Chem 2003; 68:4684-92. [PMID: 12790571 DOI: 10.1021/jo020761f] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A general synthesis protocol for the generation of tri- and tetrasubstituted 5-carbamoylhydantoins is described. Starting from barbituric acids and following bromination and reaction with primary amines, 5-aminobarbituric acids 3a-s and 8 were prepared. Compounds 3 and 8 were subjected to different conditions of a base-catalyzed rearrangement reaction to yield the 1,5,5-trisubstituted hydantoins 4a-s and the 1,3,5,5-tetrasubstituted hydantoin 5c, respectively. Alkylation of 4a-s afforded 1,3,5,5-tetrasubstituted hydantoins 5a-h. Mechanisms that explain the transformation of corresponding aminobarbituric acids to hydantoins 4a-s and 5c were discussed in terms of the formation of ring-opened intermediates. Aminobarbituric acids 3a-s unsubstituted at position 3 underwent a ring contraction via intermediate isocyanates which were trapped by the amino function. A different mechanism involving a carbamate intermediate was concluded for conversion of the 1,3,5,5-tetrasubstituted aminobarbituric acid 8.
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Affiliation(s)
- Manuela Meusel
- Pharmaceutical Institute, Poppelsdorf, University of Bonn, D-53115 Bonn, Germany
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