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Isospecific Polymerization of Halide- and Amino-Substituted Styrenes Using a Bis(phenolate) Titanium Catalyst. Catalysts 2022. [DOI: 10.3390/catal12040439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Isospecific polymerization of polar styrenes is a challenge of polymer science. Particularly challenging are monomers bearing electron-withdrawing substituents or bulky substituents. Here, we report the coordination polymerization of halide- and amino-functionalized styrenes including para-fluorostyrene (pFS), para-chlorostyrene (pClS), para-bromostyrene (pBrS), and para-(N,N-diethylamino)styrene (DMAS) using 2,2′-sulfur-bridged bis(phenolate) titanium precursor (1). The combination of 1 and [Ph3C][B(C6F5)4] and AliBu3 provides crystalline poly(pFS)s with perfect isotacticity (mmmm > 95%) and high molecular weights (≤16.0 × 104 g mol−1). Upon activation with a large excess of DMAO, 1 reaches polymerization activity of 5.58 × 105 g molTi−1 h−1 producing isotactic poly(pFS)s featuring higher molecular weights (≤39.6 × 104 g mol−1). The distinguished performance of the 1/DMAO system has been extended to the polymerization of pClS and pBrS, both usually involve halogen abstraction during the polymerization, to produce isotactic and high molecular weight (Mn = 32.2 × 104 vs. 13.7 × 104 g mol−1) polymers in good activities (2.18 × 105 vs. 1.31 × 105 g molTi−1 h−1). Surprisingly, 1/DMAO is nearly inactive for DMAS polymerization, on contrary, the system 1/[Ph3C][B(C6F5)4]/AliBu3 displays isoselectivity (mmmm > 95%) albeit in a moderate activity.
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2
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Zhang K, Dou Y, Zhang Z, Jiang Y, Li S, Cui D. Copolymerization of ethylene and halogenated styrenes using scandium catalysts. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.123057] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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3
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Wu Y, Wang Z, Liu D, Liu B, Cui D. Highly Syndioselective Coordination (Co)Polymerization of para-Chlorostyrene. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c01121] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Yi Wu
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
- Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China
| | | | - Dongtao Liu
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Bo Liu
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
- Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Dongmei Cui
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
- Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China
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4
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Costabile C, Mariconda A, Sirignano M, Longo P. Stereoselective Copolymerization of Styrene with para-Substituted Styrenes Catalyzed by Half-Titanocenes: An Experimental and Computational Study. Macromolecules 2020. [DOI: 10.1021/acs.macromol.9b02668] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Chiara Costabile
- Dipartimento di Chimica e Biologia, Università di Salerno, Via Giovanni Paolo II, 132, I-84084 Fisciano, SA, Italy
| | - Annaluisa Mariconda
- Dipartimento di Scienze, Università della Basilicata, Campus di Macchia Romana, Viale dell’Ateneo Lucano, 10, I-85100 Potenza, Italy
| | - Marco Sirignano
- Dipartimento di Chimica e Biologia, Università di Salerno, Via Giovanni Paolo II, 132, I-84084 Fisciano, SA, Italy
| | - Pasquale Longo
- Dipartimento di Chimica e Biologia, Università di Salerno, Via Giovanni Paolo II, 132, I-84084 Fisciano, SA, Italy
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5
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Guo F, Jiao N, Jiang L, Li Y, Hou Z. Scandium-Catalyzed Syndiospecific Polymerization of Halide-Substituted Styrenes and Their Copolymerization with Styrene. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b01668] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Fang Guo
- State Key Laboratory
of Fine Chemicals, Department of Polymer Science and Engineering,
School of Chemical Engineering, Dalian University of Technology, Dalian 116012, China
| | - Na Jiao
- State Key Laboratory
of Fine Chemicals, Department of Polymer Science and Engineering,
School of Chemical Engineering, Dalian University of Technology, Dalian 116012, China
| | - Lei Jiang
- State Key Laboratory
of Fine Chemicals, Department of Polymer Science and Engineering,
School of Chemical Engineering, Dalian University of Technology, Dalian 116012, China
| | - Yang Li
- State Key Laboratory
of Fine Chemicals, Department of Polymer Science and Engineering,
School of Chemical Engineering, Dalian University of Technology, Dalian 116012, China
| | - Zhaomin Hou
- State Key Laboratory
of Fine Chemicals, Department of Polymer Science and Engineering,
School of Chemical Engineering, Dalian University of Technology, Dalian 116012, China
- Organometallic
Chemistry Laboratory and Center for Sustainable Resource Science, RIKEN, 2-1 Hirosawa,
Wako, Saitama 351-0198, Japan
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6
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Chimento A, Saturnino C, Iacopetta D, Mazzotta R, Caruso A, Plutino MR, Mariconda A, Ramunno A, Sinicropi MS, Pezzi V, Longo P. Inhibition of human topoisomerase I and II and anti-proliferative effects on MCF-7 cells by new titanocene complexes. Bioorg Med Chem 2015; 23:7302-12. [PMID: 26526741 DOI: 10.1016/j.bmc.2015.10.030] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Revised: 10/15/2015] [Accepted: 10/22/2015] [Indexed: 12/14/2022]
Abstract
The antitumor activity shown by many platinum complexes has produced a strong interest in research of new organometallic compounds having anticancer action. Among the many metal compounds synthesized and tested, those based on titanium have received considerable attention because of their cytotoxic activity against solid tumors. Particularly, new titanocene compounds containing aromatic groups linked to the Cp (cyclopentadienyl ring, C5H5) have been synthetized, such as the titanocene Y (bis-[(p-methoxybenzyl)cyclopentadienyl]titanium dichloride) that displayed promising medium-high cytotoxic activity on breast cancer cell lines. Other titanocene complexes recently synthesized, obtained by replacing the substituent methoxy-aryl of cyclopentadienes of titanocene Y with ethenyl-methoxide or ethenyl-phenoxide, showed increased cytotoxic activity on breast cancer cell lines being more stable compounds. In this paper, we report that new titanocene complexes holding lipophilic groups, for instance a methyl group on benzyl carbon, exhibit improved antiproliferative effect on breast cancer cell line MCF-7. Similar results have been obtained introducing a 5-methoxy naphthyl group to further stabilize the titanocene complexes. These inhibitory effects on breast cancer cells have been ascribed to human topoisomerase I and II inhibition as demonstrated by specific enzymatic assays.
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Affiliation(s)
- Adele Chimento
- Department of Pharmacy, Health and Nutrition Sciences, University of Calabria, Arcavacata di Rende, Cosenza, Italy
| | - Carmela Saturnino
- Department of Pharmaceutical and Biomedical Sciences, University of Salerno, Fisciano (SA), Italy.
| | - Domenico Iacopetta
- Department of Pharmacy, Health and Nutrition Sciences, University of Calabria, Arcavacata di Rende, Cosenza, Italy.
| | - Rosaria Mazzotta
- Department of Pharmacy, Health and Nutrition Sciences, University of Calabria, Arcavacata di Rende, Cosenza, Italy
| | - Anna Caruso
- Department of Pharmacy, Health and Nutrition Sciences, University of Calabria, Arcavacata di Rende, Cosenza, Italy
| | - Maria Rosaria Plutino
- Department of Chemistry, University of Messina and Consorzio Interuniversitario di Ricerca in Chimica dei Metalli nei Sistemi Biologici (CIRCMSB), Vill. S. Agata, Messina, Italy
| | - Annaluisa Mariconda
- Department of Pharmaceutical and Biomedical Sciences, University of Salerno, Fisciano (SA), Italy
| | - Anna Ramunno
- Department of Pharmaceutical and Biomedical Sciences, University of Salerno, Fisciano (SA), Italy
| | - Maria Stefania Sinicropi
- Department of Pharmacy, Health and Nutrition Sciences, University of Calabria, Arcavacata di Rende, Cosenza, Italy.
| | - Vincenzo Pezzi
- Department of Pharmacy, Health and Nutrition Sciences, University of Calabria, Arcavacata di Rende, Cosenza, Italy
| | - Pasquale Longo
- Department of Chemistry and Biology, University of Salerno, Fisciano (SA), Italy
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7
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Guo F, Wang B, Ma H, Li T, Li Y. Scandium-catalyzed synthesis of Si-H-containing syndiotactic polystyrene and its functionalized polymer carrying pendant perylene bisimide units. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/pola.27923] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Fang Guo
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering; Dalian University of Technology; Dalian 116024 China
| | - Bai Wang
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering; Dalian University of Technology; Dalian 116024 China
| | - Hongwei Ma
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering; Dalian University of Technology; Dalian 116024 China
| | - Tingting Li
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering; Dalian University of Technology; Dalian 116024 China
| | - Yang Li
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering; Dalian University of Technology; Dalian 116024 China
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8
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Longo P, Mariconda A, D’Urso L, Napoli M. Syndiotactic–Atactic Stereoblock Polystyrene Obtained with a Hapto-Flexible Catalyst. Macromolecules 2014. [DOI: 10.1021/ma500134h] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Pasquale Longo
- Dipartimento di Chimica e Biologia, Università di Salerno, I-84084 Fisciano (SA), Italy
| | - Annaluisa Mariconda
- Dipartimento di Chimica e Biologia, Università di Salerno, I-84084 Fisciano (SA), Italy
| | - Luciana D’Urso
- Dipartimento di Chimica e Biologia, Università di Salerno, I-84084 Fisciano (SA), Italy
| | - Mariagrazia Napoli
- Dipartimento di Chimica e Biologia, Università di Salerno, I-84084 Fisciano (SA), Italy
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9
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Soshnikov IE, Semikolenova NV, Ma J, Zhao KQ, Zakharov VA, Bryliakov KP, Redshaw C, Talsi EP. Selective Ethylene Trimerization by Titanium Complexes Bearing Phenoxy-Imine Ligands: NMR and EPR Spectroscopic Studies of the Reaction Intermediates. Organometallics 2014. [DOI: 10.1021/om500017r] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Igor E. Soshnikov
- Boreskov Institute of Catalysis, Pr. Lavrentieva 5, Novosibirsk 630090, Russian Federation
- Novosibirsk State University, Pirogova
2, Novosibirsk 630090, Russian Federation
| | - Nina V. Semikolenova
- Boreskov Institute of Catalysis, Pr. Lavrentieva 5, Novosibirsk 630090, Russian Federation
| | - Jing Ma
- College
of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, People’s Republic of China
| | - Ke-Qing Zhao
- College
of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, People’s Republic of China
| | - Vladimir A. Zakharov
- Boreskov Institute of Catalysis, Pr. Lavrentieva 5, Novosibirsk 630090, Russian Federation
- Novosibirsk State University, Pirogova
2, Novosibirsk 630090, Russian Federation
| | - Konstantin P. Bryliakov
- Boreskov Institute of Catalysis, Pr. Lavrentieva 5, Novosibirsk 630090, Russian Federation
- Novosibirsk State University, Pirogova
2, Novosibirsk 630090, Russian Federation
| | - Carl Redshaw
- College
of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, People’s Republic of China
- Department of Chemistry, The University of Hull, Cottingham Rd, Hull HU6
7RX, United Kingdom
| | - Evgenii P. Talsi
- Boreskov Institute of Catalysis, Pr. Lavrentieva 5, Novosibirsk 630090, Russian Federation
- Novosibirsk State University, Pirogova
2, Novosibirsk 630090, Russian Federation
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10
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Lenton TN, Bercaw JE, Panchenko VN, Zakharov VA, Babushkin DE, Soshnikov IE, Talsi EP, Brintzinger HH. Formation of Trivalent Zirconocene Complexes from ansa-Zirconocene-Based Olefin-Polymerization Precatalysts: An EPR- and NMR-Spectroscopic Study. J Am Chem Soc 2013; 135:10710-9. [DOI: 10.1021/ja403170u] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Taylor N. Lenton
- Arnold and Mabel Beckman Laboratories
of Chemical Synthesis, California Institute of Technology, Pasadena, California 91125, United States
| | - John E. Bercaw
- Arnold and Mabel Beckman Laboratories
of Chemical Synthesis, California Institute of Technology, Pasadena, California 91125, United States
| | - Valentina N. Panchenko
- Boreskov Institute of Catalysis, Russian Academy of Science, Siberian Branch, Pr. Lavrentieva
5, 630090 Novosibirsk, Russian Federation
| | - Vladimir A. Zakharov
- Boreskov Institute of Catalysis, Russian Academy of Science, Siberian Branch, Pr. Lavrentieva
5, 630090 Novosibirsk, Russian Federation
| | - Dmitrii E. Babushkin
- Boreskov Institute of Catalysis, Russian Academy of Science, Siberian Branch, Pr. Lavrentieva
5, 630090 Novosibirsk, Russian Federation
| | - Igor E. Soshnikov
- Boreskov Institute of Catalysis, Russian Academy of Science, Siberian Branch, Pr. Lavrentieva
5, 630090 Novosibirsk, Russian Federation
| | - Evgenii P. Talsi
- Boreskov Institute of Catalysis, Russian Academy of Science, Siberian Branch, Pr. Lavrentieva
5, 630090 Novosibirsk, Russian Federation
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11
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Sirignano E, Saturnino C, Botta A, Sinicropi MS, Caruso A, Pisano A, Lappano R, Maggiolini M, Longo P. Synthesis, characterization and cytotoxic activity on breast cancer cells of new half-titanocene derivatives. Bioorg Med Chem Lett 2013; 23:3458-62. [PMID: 23623493 DOI: 10.1016/j.bmcl.2013.03.059] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2012] [Revised: 03/13/2013] [Accepted: 03/15/2013] [Indexed: 11/17/2022]
Abstract
A series of novel titanocene-complexes has been prepared and evaluated for their growth regulatory effects in MCF7 and SkBr3 breast cancer cells. The capability of some of these compound to elicit relevant repressive effects on cancer cell growth could be taken into account towards novel pharmacological approaches in cancer therapy.
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Affiliation(s)
- Esther Sirignano
- Department of Pharmaceutical and Biomedical Sciences, University of Salerno, Italy
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12
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Synthesis of ethylene–styrene copolymer containing syndiotactic polystyrene sequence by trivalent titanium catalyst. Polym J 2011. [DOI: 10.1038/pj.2011.109] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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13
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Luo Y, Luo Y, Qu J, Hou Z. QM/MM Studies on Scandium-Catalyzed Syndiospecific Copolymerization of Styrene and Ethylene. Organometallics 2011. [DOI: 10.1021/om100998c] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Yi Luo
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116012, People's Republic of China
| | - Yunjie Luo
- School of Biological and Chemical Engineering, Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, People's Republic of China
| | - Jingping Qu
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116012, People's Republic of China
| | - Zhaomin Hou
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116012, People's Republic of China
- Organometallic Chemistry Laboratory, RIKEN Advanced Science Institute, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
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14
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Ricciardi R, Napoli M, Longo P. Facile synthesis of blocky styrene(1,3)-butadiene copolymers having stereoregular monomeric sequences. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/pola.23829] [Citation(s) in RCA: 9] [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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