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Ahmad S, Akhtar R, Zahoor AF. Comprehensive Account on the Synthesis of (-)-Balanol and its Analogues. Curr Org Synth 2021; 19:56-85. [PMID: 34370642 DOI: 10.2174/1570179418666210809131917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 06/17/2021] [Accepted: 06/25/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND A variety of diseases have been associated with hyperactivation of protein kinase C (PKC) enzymes such as cancer, diabetes, asthma, cardiovascular and central nervous system disorders. There is a dire need to selectively inhibit these enzymes by synthesizing new potent inhibitors. Balanol, a fungal metabolite belonging to the PKC inhibitor family, is especially included in this aspect. Tremendous effort has been put towards the synthesis of balanol by different research groups. OBJECTIVE The aim of this review is to provide a detailed description of synthetic approaches adopted for the synthesis of key fragments of balanol (azepane and benzophenone). All the factors that resulted in excellent yield and high enantioselectivity have also been mentioned. CONCLUSION It has been shown throughout this review that the synthesis of hexahydroazepine and benzophenone cores of balanol was achieved by employing a variety of important key steps with commercially available starting precursors, which make this total synthesis more valuable. Moreover, this article provides ideas to the synthetic as well as pharmaceutical chemists for the synthesis of (-)-balanol and its analogues.
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Affiliation(s)
- Sajjad Ahmad
- Department of Chemistry, University of Engineering and Technology Lahore, Faisalabad Campus, 38000-Faisalabad, Pakistan
| | - Rabia Akhtar
- Department of Chemistry, Government College University Faisalabad, 38000-Faisalabad, Pakistan
| | - Ameer Fawad Zahoor
- Department of Chemistry, Government College University Faisalabad, 38000-Faisalabad, Pakistan
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Zhang Q, Jin B, Zheng T, Tang X, Guo Z, Peng R. Hexadentate β-Dicarbonyl(bis-catecholamine) Ligands for Efficient Uranyl Cation Decorporation: Thermodynamic and Antioxidant Activity Studies. Inorg Chem 2019; 58:14626-14634. [PMID: 31613591 DOI: 10.1021/acs.inorgchem.9b02306] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The special linear dioxo cation structure of the uranyl cation, which relegates ligand coordination to an equatorial plane perpendicular to the O═U═O vector, poses an unusual challenge for the rational design of efficient chelating agents. Therefore, the planar hexadentate ligand rational design employed in this work incorporates two bidentate catecholamine (CAM) chelating moieties and a flexible linker with a β-dicarbonyl chelating moiety (β-dicarbonyl(CAM)2 ligands). The solution thermodynamics of β-dicarbonyl(CAM)2 with a uranyl cation was investigated by potentiometric and spectrophotometric titrations. The results demonstrated that the pUO22+ values are significantly higher than for the previously reported TMA(2Li-1,2-HOPO)2, and efficient chelation of the uranyl cation was realized by the planar hexadentate β-dicarbonyl(CAM)2. The efficient chelating ability of β-dicarbonyl(CAM)2 was attributed to the presence of the more flexible β-dicarbonyl chelating linker and planar hexadentate structure, which favors the geometric arrangement between ligand and uranyl coordinative preference. Meanwhile, β-dicarbonyl(CAM)2 also exhibits higher antiradical efficiency in comparison to butylated hydroxyanisole. These results indicated that β-dicarbonyl(CAM)2 has potential application prospects as a chelating agent for efficient chelation of a uranyl cation.
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Affiliation(s)
- Qingchun Zhang
- State Key Laboratory of Environment-friendly Energy Materials , Southwest University of Science and Technology , Mianyang 621010 , People's Republic of China
| | - Bo Jin
- State Key Laboratory of Environment-friendly Energy Materials , Southwest University of Science and Technology , Mianyang 621010 , People's Republic of China
| | - Tian Zheng
- State Key Laboratory of Environment-friendly Energy Materials , Southwest University of Science and Technology , Mianyang 621010 , People's Republic of China
| | - Xingyan Tang
- Sichuan Research Center of New Materials, Institute of Chemical Materials , China Academy of Engineering Physics , Chengdu 610200 , People's Republic of China
| | - Zhicheng Guo
- School of National Defense Science and Technology , Southwest University of Science and Technology , Mianyang 621010 , People's Republic of China
| | - Rufang Peng
- State Key Laboratory of Environment-friendly Energy Materials , Southwest University of Science and Technology , Mianyang 621010 , People's Republic of China
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Zhang Q, Jin B, Wang X, Lei S, Shi Z, Zhao J, Liu Q, Peng R. The mono(catecholamine) derivatives as iron chelators: synthesis, solution thermodynamic stability and antioxidant properties research. ROYAL SOCIETY OPEN SCIENCE 2018; 5:171492. [PMID: 30110407 PMCID: PMC6030290 DOI: 10.1098/rsos.171492] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Accepted: 05/02/2018] [Indexed: 06/08/2023]
Abstract
There is a growing interest in the development of new iron chelators as novel promising therapeutic strategies for neurodegenerative disorders. In this article, a series of mono(catecholamine) derivatives, 2,3-bis(hydroxy)-N-(hydroxyacyl)benzamide, containing a pendant hydroxy, have been synthesized and fully characterized by nuclear magnetic resonance, Fourier transform infrared spectroscopy and mass spectrum. The thermodynamic stability of the chelators with FeIII, MgII and ZnII ions was then investigated. The chelators enable formation of (3 : 1) FeIII complexes with high thermodynamic stability and exhibited improved selectivity to FeIII ion. Meanwhile, the results of 1,1-diphenyl-2-picryl-hydrazyl assays of mono(catecholamine) derivatives indicated that they all possess excellent antioxidant properties. These results support the hypothesis that the mono(catecholamine) derivatives be used as high-affinity chelator for iron overload situations without depleting essential metal ions, such as MgII and ZnII ions.
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Affiliation(s)
- Qingchun Zhang
- State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials, Southwest University of Science and Technology, Mianyang 621010, People's Republic of China
- School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, People's Republic of China
| | - Bo Jin
- State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials, Southwest University of Science and Technology, Mianyang 621010, People's Republic of China
| | - Xiaofang Wang
- State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials, Southwest University of Science and Technology, Mianyang 621010, People's Republic of China
| | - Shan Lei
- State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials, Southwest University of Science and Technology, Mianyang 621010, People's Republic of China
| | - Zhaotao Shi
- School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, People's Republic of China
| | - Jia Zhao
- School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, People's Republic of China
| | - Qiangqiang Liu
- Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621010, People's Republic of China
| | - Rufang Peng
- State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials, Southwest University of Science and Technology, Mianyang 621010, People's Republic of China
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Novel enterobactin analogues as potential therapeutic chelating agents: Synthesis, thermodynamic and antioxidant studies. Sci Rep 2016; 6:34024. [PMID: 27671769 PMCID: PMC5037427 DOI: 10.1038/srep34024] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Accepted: 09/06/2016] [Indexed: 11/21/2022] Open
Abstract
A series of novel hexadentate enterobactin analogues, which contain three catechol chelating moieties attached to different molecular scaffolds with flexible alkyl chain lengths, were prepared. The solution thermodynamic stabilities of the complexes with uranyl, ferric(III), and zinc(II) ions were then investigated. The hexadentate ligands demonstrate effective binding ability to uranyl ion, and the average uranyl affinities are two orders of magnitude higher than 2,3-dihydroxy-N1,N4-bis[(1,2-hydroxypyridinone-6-carboxamide)ethyl]terephthalamide [TMA(2Li-1,2-HOPO)2] ligand with similar denticity. The high affinity of hexadentate ligands could be due to the presence of the flexible scaffold, which favors the geometric agreement between the ligand and the uranyl coordination preference. The hexadentate ligands also exhibit higher antiradical efficiency than butylated hydroxyanisole (BHA). These results provide a basis for further studies on the potential applications of hexadentate ligands as therapeutic chelating agents.
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Tzeli D, Kozielewicz P, Zervou M, Potamitis C, Kokkotou K, Rak B, Petrou A, Tsolaki E, Gavalas A, Geronikaki A, Petsalakis ID, Tsoungas PG. 2, 2′-Dihydroxybenzophenones and Derivatives. Efficient Synthesis and Structure Endoscopy by DFT and NMR. Credentials as Potent Antiinflammatory Agents. ChemistrySelect 2016. [DOI: 10.1002/slct.201600396] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Demeter Tzeli
- Theoretical and Physical Chemistry Institute; National Hellenic Research Foundation; 48 Vassileos Constantinou Ave. Athens 116 35 Greece
| | - Pawel Kozielewicz
- School of Clinical and Experimental Medicine; College of Medical and Dental Sciences; University of Birmingham, Edgbaston; Birmingham B15 2TT UK
| | - Maria Zervou
- Institute of Biology; Medicinal Chemistry and Biotechnology; National Hellenic Research Foundation; 48 Vassileos Constantinou Ave. Athens 116 35 Greece
| | - Constantinos Potamitis
- Institute of Biology; Medicinal Chemistry and Biotechnology; National Hellenic Research Foundation; 48 Vassileos Constantinou Ave. Athens 116 35 Greece
| | - Katerina Kokkotou
- Institute of Biology; Medicinal Chemistry and Biotechnology; National Hellenic Research Foundation; 48 Vassileos Constantinou Ave. Athens 116 35 Greece
| | - Benedikt Rak
- Centre for New Technologies; University of Warsaw; 02-097 Warsaw Poland
| | - Anthi Petrou
- Laboratory of Pharmaceutical.Chemistry; School of Pharmacy; Aristotle University of Thessaloniki; Thessaloniki 54124 Greece
| | - Evangelia Tsolaki
- Laboratory of Pharmaceutical.Chemistry; School of Pharmacy; Aristotle University of Thessaloniki; Thessaloniki 54124 Greece
| | - Antonios Gavalas
- Laboratory of Pharmaceutical.Chemistry; School of Pharmacy; Aristotle University of Thessaloniki; Thessaloniki 54124 Greece
| | - Athina Geronikaki
- Laboratory of Pharmaceutical.Chemistry; School of Pharmacy; Aristotle University of Thessaloniki; Thessaloniki 54124 Greece
| | - Ioannis D. Petsalakis
- Theoretical and Physical Chemistry Institute; National Hellenic Research Foundation; 48 Vassileos Constantinou Ave. Athens 116 35 Greece
| | - Petros G. Tsoungas
- Department of Biochemistry; Hellenic Pasteur Institute; 127 Vas.Sofias Ave. Athens GR-11521 Greece
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Zhang Q, Jin B, Peng R, Lei S, Chu S. Synthesis and characterization of a potential bifunctional C60-Ih fullerene-based catechol amide ligand. MENDELEEV COMMUNICATIONS 2015. [DOI: 10.1016/j.mencom.2015.05.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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7
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Zhang Q, Jin B, Peng R, Lei S, Chu S. Symmetrical 1,3-dicarbonyl biscatecholamide ligands as sequestering agents for uranyl decorporation. Polyhedron 2015. [DOI: 10.1016/j.poly.2014.12.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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8
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Denis JG, Franci G, Altucci L, Aurrecoechea JM, de Lera ÁR, Álvarez R. Synthesis of 7-alkylidene-7,12-dihydroindolo[3,2-d]benzazepine-6-(5H)-ones (7-alkylidene-paullones) by N-cyclization–oxidative Heck cascade and characterization as sirtuin modulators. Org Biomol Chem 2015; 13:2800-10. [DOI: 10.1039/c4ob02493a] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A palladium-induced cascade of N-cyclization and oxidative Heck reaction of o-alkynylanilines produced 7-alkylidene-indolobenzazepinones (paullones) that have sirtuin modulation activities.
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Affiliation(s)
- J. G. Denis
- Departamento de Química Orgánica
- Facultad de Química (CINBIO) and Instituto de Investigación Biomédica de Vigo (IBIV)
- Universidade de Vigo
- 36310 Vigo
- Spain
| | - G. Franci
- Seconda Università degli Studi di Napoli
- Dipartimento di Biochimica
- Biofisica e Patologia generale
- Napoli
- Italy
| | - L. Altucci
- Seconda Università degli Studi di Napoli
- Dipartimento di Biochimica
- Biofisica e Patologia generale
- Napoli
- Italy
| | - J. M. Aurrecoechea
- Departamento de Química Orgánica II
- Facultad de Ciencia y Tecnología
- Universidad del País Vasco
- 48080 Bilbao
- Spain
| | - Á. R. de Lera
- Departamento de Química Orgánica
- Facultad de Química (CINBIO) and Instituto de Investigación Biomédica de Vigo (IBIV)
- Universidade de Vigo
- 36310 Vigo
- Spain
| | - R. Álvarez
- Departamento de Química Orgánica
- Facultad de Química (CINBIO) and Instituto de Investigación Biomédica de Vigo (IBIV)
- Universidade de Vigo
- 36310 Vigo
- Spain
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9
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Baker AE, Marchal E, Lund KLA, Thompson A. The use of tin(IV) chloride to selectively cleave benzyl esters over benzyl ethers and benzyl amines. CAN J CHEM 2014. [DOI: 10.1139/cjc-2014-0364] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Benzyl esters are cleaved upon reaction with SnCl4, resulting in isolation of the corresponding carboxylic acid. Importantly, benzyl ethers, amines, and amides do not undergo debenzylation under these conditions, nor do a variety of other common protecting groups for alcohols, thereby rendering SnCl4 selective amongst Lewis acids. The scope, tolerance, and limitations of the strategy are demonstrated through the analysis of several multifunctional substrates, including those bearing Cbz groups.
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Affiliation(s)
- Alexander E.G. Baker
- Department of Chemistry, Dalhousie University, P.O. Box 15000, Halifax, NS B3H 4R2, Canada
| | - Estelle Marchal
- Department of Chemistry, Dalhousie University, P.O. Box 15000, Halifax, NS B3H 4R2, Canada
| | - Kate-lyn A.R. Lund
- Department of Chemistry, Dalhousie University, P.O. Box 15000, Halifax, NS B3H 4R2, Canada
| | - Alison Thompson
- Department of Chemistry, Dalhousie University, P.O. Box 15000, Halifax, NS B3H 4R2, Canada
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10
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Axelsson L, Veron JB, Sävmarker J, Lindh J, Odell LR, Larhed M. An improved palladium(II)-catalyzed method for the synthesis of aryl ketones from aryl carboxylic acids and organonitriles. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.02.109] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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11
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Saha T, Maitra R, Chattopadhyay SK. A unified approach to the important protein kinase inhibitor balanol and a proposed analogue. Beilstein J Org Chem 2013; 9:2910-5. [PMID: 24454570 PMCID: PMC3896276 DOI: 10.3762/bjoc.9.327] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2013] [Accepted: 11/07/2013] [Indexed: 11/26/2022] Open
Abstract
A common approach to the important protein kinase inhibitor (−)-balanol and an azepine-ring-modified balanol derivative has been developed using an efficient fragment coupling protocol which proceeded in good overall yield.
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Affiliation(s)
- Tapan Saha
- Department of Chemistry, University of Kalyani, Kalyani - 741235, West Bengal, India
| | - Ratnava Maitra
- Department of Chemistry, University of Kalyani, Kalyani - 741235, West Bengal, India
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Cho HH, Kim SH. A Versatile Protocol for the Preparation of Highly Hindered Aryl Ketones Using Organozinc Reagents. B KOREAN CHEM SOC 2012. [DOI: 10.5012/bkcs.2012.33.9.3083] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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13
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Leydier A, Lin Y, Arrachart G, Turgis R, Lecerclé D, Favre-Reguillon A, Taran F, Lemaire M, Pellet-Rostaing S. EDTA and DTPA modified ligands as sequestering agents for uranyl decorporation. Tetrahedron 2012. [DOI: 10.1016/j.tet.2011.11.065] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Louvel J, Chemla F, Demont E, Ferreira F, Pérez-Luna A, Voituriez A. Stereoselective Synthesis of syn-β-Amino Propargylic Ethers: Application to the Asymmetric Syntheses of (+)-β-Conhydrine and (−)-Balanol. Adv Synth Catal 2011. [DOI: 10.1002/adsc.201100333] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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15
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Leydier A, Lecerclé D, Pellet-Rostaing S, Favre-Reguillon A, Taran F, Lemaire M. Sequestering agent for uranyl chelation: new binaphtyl ligands. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.05.075] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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16
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Godoi B, Schumacher RF, Zeni G. Synthesis of heterocycles via electrophilic cyclization of alkynes containing heteroatom. Chem Rev 2011; 111:2937-80. [PMID: 21425870 DOI: 10.1021/cr100214d] [Citation(s) in RCA: 573] [Impact Index Per Article: 44.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Benhur Godoi
- Laboratório de Síntese, Reatividade, Avaliação Farmacológica e Toxicológica de Organocalcogênios, CCNE, UFSM, Santa Maria-Rio Grande do Sul, Brazil 97105-900
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Lo Fiego MJ, Silbestri GF, Chopa AB, Lockhart MT. Selective Synthetic Routes to Sterically Hindered Unsymmetrical Diaryl Ketones via Arylstannanes. J Org Chem 2011; 76:1707-14. [DOI: 10.1021/jo102366q] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Marcos J. Lo Fiego
- Instituto de Química del Sur (CONICET − UNS), Departamento de Química, Universidad Nacional del Sur, Avenida Alem 1253, Bahía Blanca, B8000CPB, Argentina
| | - Gustavo F. Silbestri
- Instituto de Química del Sur (CONICET − UNS), Departamento de Química, Universidad Nacional del Sur, Avenida Alem 1253, Bahía Blanca, B8000CPB, Argentina
| | - Alicia B. Chopa
- Instituto de Química del Sur (CONICET − UNS), Departamento de Química, Universidad Nacional del Sur, Avenida Alem 1253, Bahía Blanca, B8000CPB, Argentina
| | - María T. Lockhart
- Instituto de Química del Sur (CONICET − UNS), Departamento de Química, Universidad Nacional del Sur, Avenida Alem 1253, Bahía Blanca, B8000CPB, Argentina
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Ito F, Ando S, Iuchi M, Nakamura T, Satoko Yorita, Yamaguchi K. (15)N-Labeled ionic probes for bioanalytical mass spectrometry. Org Biomol Chem 2010; 8:4408-13. [PMID: 20714487 DOI: 10.1039/c003784b] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An effective La-complex-based probe ionization method is reported. Novel stable isotopically labeled probes containing the (15)N-labeled 2,6-bis(oxazolin-2-yl)pyridine (pybox) ligand, succinimide-tetramethylpybox (NHS-TMpybox), maleimide-tetramethylpybox (Mal-TMpybox), and 4-(tetramethylpybox)-butyl bromoacetate (BrAc-TMpybox), have been synthesized and their value in analyzing large complex molecules has been studied. The value of the (15)N-labeled pybox-La complex in ionizing various compounds, including bioactive peptides by cold-spray ionization mass spectrometry is emphasized.
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Affiliation(s)
- Fumihiro Ito
- Faculty of Pharmaceutical Sciences at Kagawa Campus, Tokushima Bunri University, 1314-1 Shido, Sanuki, Kagawa 769-2193, Japan.
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Würthner F, Bräse S, Sewald N, Herges R, Senge MO, Bach T, Gottwald T, Kopf T, Ŝpehar K, Hartung J, Plattner D, Gansäuer A, Oestreich M, Brückner R, Pietruszka J, Süßmuth R, Müller M, Weinhold E, Jäschke A, Albrecht M, Priepke H, Roth G, Ditrich K, Ernst A, Wortmann L, Ag S. Organische Chemie 2002. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/nadc.20030510309] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Brennführer A, Neumann H, Pews-Davtyan A, Beller M. Catalytic and Stoichiometric Synthesis of Novel 3-Aminocarbonyl-, 3-Alkoxycarbonyl-, and 3-Amino-4-indolylmaleimides. European J Org Chem 2008. [DOI: 10.1002/ejoc.200800964] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Srivastava AK, Panda G. Total synthesis of (-)-balanol, all stereoisomers, their N-tosyl analogues, and fully protected ophiocordin: an easy route to hexahydroazepine cores from garner aldehydes. Chemistry 2008; 14:4675-88. [PMID: 18399526 DOI: 10.1002/chem.200701991] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Total syntheses of (-)-balanol and all of its stereoisomers starting from easily available Garner aldehydes are described. Diastereoselective Grignard reactions on Garner aldehydes and ring-closing metatheses are the key steps for the construction of hexahydroazepine subunits. The benzophenone subunits were constructed through coupling of suitably functionalized aromatic aldehyde and bromo components. The synthetic route constitutes a convenient and scalable reaction sequence to generate all of the stereoisomers of balanol. The methodology is explored further for the synthesis of N-tosyl analogues of balanol and of fully protected ophiocordin.
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Affiliation(s)
- Ajay Kumar Srivastava
- Medicinal and Process Chemistry Division, Central Drug Research Institute, Lucknow, UP, India
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Ambika, Singh PP, Chauhan SMS. Chemoselective Esterification of Phenolic Acids in the Presence of Sodium Bicarbonate in Ionic Liquids. SYNTHETIC COMMUN 2008. [DOI: 10.1080/00397910701845480] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Ambika
- a Department of Chemistry , University of Delhi , Delhi, India
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Brito CM, Pinto DCGA, Silva AMS, Silva AMG, Tomé AC, Cavaleiro JAS. Diels–Alder Reactions of 2′-Hydroxychalcones withortho-Benzoquino-dimethane: A New Synthesis of 3-Aryl-2-naphthyl 2-Hydroxyphenyl Ketones. European J Org Chem 2006. [DOI: 10.1002/ejoc.200500872] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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26
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Patil ML, Borate HB. The Synthesis of Substituted Tetrahydro-1H-xanthen-1-ones and Xanthenes. JOURNAL OF CHEMICAL RESEARCH 2005. [DOI: 10.3184/030823405774309023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A short and an efficient methodology for the synthesis of substituted tetrahydro-1H-1-xanthenones and xanthenes is described.
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Affiliation(s)
- Mahesh L. Patil
- National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411 008, India
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Gardner RA, Kinkade R, Wang C, Phanstiel O. Total synthesis of petrobactin and its homologues as potential growth stimuli for Marinobacter hydrocarbonoclasticus, an oil-degrading bacteria. J Org Chem 2004; 69:3530-7. [PMID: 15132566 DOI: 10.1021/jo049803l] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A modular synthesis was developed to access petrobactin, a catechol-containing siderophore isolated from Marinobacter hydrocarbonoclasticus. A range of petrobactin homologues with differing dihydroxybenzamide motifs and in one case an increased number of carbons in the polyamine backbone were also synthesized. As such, these systems represent new isomeric probes to study iron transport properties in M. hydrocarbonoclasticus. The synthesis of petrobactin and its homologues and the first biological study of how these agents influence the growth of Mycobacterhydrocarbonoclasticus are reported. New synthetic methods were developed to overcome issues (imide formation) encountered in earlier syntheses. Both the (1)H and (13)C NMR of petrobactin were consistent with the recently revised structure showing that petrobactin in fact contains a 3,4-dihydroxybenzene motif rather than a 2,3-dihydroxybenzene motif. The preliminary biological studies suggested that using the native petrobactin 1b for M. hydrocarbonoclasticus-specific growth stimulation may be a poor strategy for oil-spill cleanup.
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Affiliation(s)
- Richard Andrew Gardner
- Department of Chemistry, University of Central Florida, Orlando, Florida 32816-2366, USA
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Arnold LA, Luo W, Guy RK. Synthesis of Medium Ring Heterocycles Using an Intramolecular Heck Reaction. Org Lett 2004; 6:3005-7. [PMID: 15330669 DOI: 10.1021/ol0487884] [Citation(s) in RCA: 78] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Historically, general convergent syntheses of medium ring heterocycles have been difficult to develop. Herein, we describe the synthesis of five classes of heterocycles: dihydrodibenzo[b,f]azepine, -oxocine, and -thiocine and dibenzo[b,f]azepine and -oxepine using a strategy of alkylation followed by highly selective intramolecular Heck arylation reaction. The hetero-tricyclic compounds were available in only two steps starting from commercially available starting materials.
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Affiliation(s)
- Leggy A Arnold
- Department of Pharmaceutical Chemistry, University of California-San Francisco, 600 16th Street, San Francisco, California 94143-2280, USA
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Gille S, Ferry A, Billard T, Langlois BR. Synthesis of alpha-trifluoromethylated nitrogen heterocycles. J Org Chem 2004; 68:8932-5. [PMID: 14604364 DOI: 10.1021/jo035097x] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The syntheses of various alpha-trifluoromethylated nitrogen heterocycles have been achieved from readily available alpha-(trifluoromethyl)homoallylamine through a ring-closing metathesis.
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Affiliation(s)
- Ségolène Gille
- Laboratoire SERCOF (UMR CNRS 5181). Université Claude Bernard--Lyon 1. Bât. Chevreul., 43 Boulevard du 11 Novembre 1918, 69622 Villeurbanne, France
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