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Khawdas W, Sawada Y, Miyata K, Okamura H, Taki K, Ito H. Enhancing the Delamination Efficiency of Polyimide-Copper Bilayers with UV/Heat-Activated Foamable Adhesive: Insights and Applications. ACS APPLIED MATERIALS & INTERFACES 2024; 16:31788-31797. [PMID: 38850559 DOI: 10.1021/acsami.4c04417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2024]
Abstract
This study explores the adhesive properties of copolymers comprising glycidyl methacrylate (GMA) and 3-(trimethoxysilyl)propyl methacrylate (MPTMS), focusing on their suitability for adhesive applications. Peel resistance measurements revealed a substantial impact of the GMA/MPTMS ratio on adhesion capabilities, identifying an optimal ratio of 30/70 for copolymerization with tert-butyl acrylate (tBA) to improve foaming performance. tBA, a foaming monomer activated by a photoacid generator and heat, enhances the copolymerized adhesive's adhesion strength and foamability for postuse delamination. Chemical structure analysis through Nuclear magnetic resonance (NMR) and Fourier-transform infrared spectroscopy (FTIR) confirmed successful polymerization, while rheological properties indicated decreased complex viscosity and adhesive strength with an increasing tBA content. The deprotection of the t-butyl group facilitated foam formation, supported by morphology analysis. These findings provide insights into foamable adhesive development with potential applications in delamination processes and implications for further exploration in polymer adhesion.
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Affiliation(s)
- Wichean Khawdas
- Research Center for GREEN Materials and Advanced Processing, Yamagata University, Yonezawa, Yamagata 992-8510, Japan
| | - Yuko Sawada
- Research Center for GREEN Materials and Advanced Processing, Yamagata University, Yonezawa, Yamagata 992-8510, Japan
| | - Ken Miyata
- Department of Organic Materials Science, Graduate School of Organic Materials Science, Yamagata University, Yonezawa, Yamagata 992-8510, Japan
| | - Haruyuki Okamura
- Department of Applied Chemistry Graduate School of Engineering, Osaka Metropolitan University, Sakai, Osaka 599-8531, Japan
| | - Kentaro Taki
- Department of Frontier Engineering, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa 920-1192, Japan
| | - Hiroshi Ito
- Research Center for GREEN Materials and Advanced Processing, Yamagata University, Yonezawa, Yamagata 992-8510, Japan
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Hidasová D, Slanina T. Triarylamminium Radical Cation Facilitates the Deprotection of tert-Butyl Groups in Esters, Ethers, Carbonates, and Carbamates. J Org Chem 2023. [PMID: 37126731 DOI: 10.1021/acs.joc.3c00238] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
We report a catalytic protocol for mild OtBu deprotection using two commercial reagents: the tris-4-bromophenylamminium radical cation, commonly known as magic blue (MB•+), and triethylsilane. Magic blue catalytically facilitates the cleavage of the C-O bond in tert-butyl carbamates, carbonates, esters, and ethers in a high isolated yield of up to 95%, and sacrificial triethylsilane accelerates the reaction. Without requiring high temperatures, transition metals, or strong acidic or basic catalysts, this method is suitable for structurally diverse compounds, including aliphatic, aromatic, and heterocyclic substrates.
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Affiliation(s)
- Denisa Hidasová
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 166 10 Prague, Czech Republic
| | - Tomáš Slanina
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 166 10 Prague, Czech Republic
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Xu D, Yang F, Chen J, Zhu T, Wang F, Xiao Y, Liang Z, Bi L, Huang G, Jiang Z, Shan H, Li D. Novel STING-targeted PET radiotracer for alert and therapeutic evaluation of acute lung injury. Acta Pharm Sin B 2022; 13:2124-2137. [DOI: 10.1016/j.apsb.2022.12.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 12/11/2022] [Accepted: 12/15/2022] [Indexed: 12/29/2022] Open
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Chen L, Liang H, Xing J. Synthesis of multidentate functional monomer for ion imprinting. J Sep Sci 2020; 43:1356-1364. [DOI: 10.1002/jssc.201901063] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 01/20/2020] [Accepted: 01/20/2020] [Indexed: 02/03/2023]
Affiliation(s)
- Liangqun Chen
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education)College of Chemistry and Molecular SciencesWuhan University Wuhan P.R. China
| | - Hongbing Liang
- Monitoring Laboratory 2Wuhan Environmental Monitoring Center Wuhan P.R. China
| | - Jun Xing
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education)College of Chemistry and Molecular SciencesWuhan University Wuhan P.R. China
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Li P, Yang S, Zhu R, Sun B, Li Z, Huang P, Buser JY, Miguel Minguez J, Ryan SJ. Continuous Flow Conditions for High Temperature Formation of a Benzodioxan Pharmaceutical Intermediate: Rapid Scaleup for Early Phase Material Delivery. Org Process Res Dev 2020. [DOI: 10.1021/acs.oprd.9b00499] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Pengbin Li
- Shanghai SynTheAll Pharmaceutical Co., Ltd. (“STA”), No. 7 Building, #90 Delin Road, WaiGaoQiao Free Trade Zone, Shanghai, 200131, People’s Republic of China
| | - Shaohui Yang
- Shanghai SynTheAll Pharmaceutical Co., Ltd. (“STA”), No. 7 Building, #90 Delin Road, WaiGaoQiao Free Trade Zone, Shanghai, 200131, People’s Republic of China
| | - Ruiheng Zhu
- Shanghai SynTheAll Pharmaceutical Co., Ltd. (“STA”), No. 7 Building, #90 Delin Road, WaiGaoQiao Free Trade Zone, Shanghai, 200131, People’s Republic of China
| | - Baoquan Sun
- Shanghai SynTheAll Pharmaceutical Co., Ltd. (“STA”), No. 7 Building, #90 Delin Road, WaiGaoQiao Free Trade Zone, Shanghai, 200131, People’s Republic of China
| | - Zhongbo Li
- Shanghai SynTheAll Pharmaceutical Co., Ltd. (“STA”), No. 7 Building, #90 Delin Road, WaiGaoQiao Free Trade Zone, Shanghai, 200131, People’s Republic of China
| | - Ping Huang
- Shanghai SynTheAll Pharmaceutical Co., Ltd. (“STA”), No. 7 Building, #90 Delin Road, WaiGaoQiao Free Trade Zone, Shanghai, 200131, People’s Republic of China
| | - Jonas Y. Buser
- Eli Lilly and Company, Small Molecule Design and Development (SMDD), Lilly Technology Center North, 1223 West Morris Street, Indianapolis, Indiana 46221, United States
| | - Jose Miguel Minguez
- Eli Lilly and Company, Discovery Chemistry Research and Technologies (DCRT), Avda. de la Industria 30, 28108 Alcobendas, Madrid, Spain
| | - Sarah J. Ryan
- Eli Lilly and Company, Small Molecule Design and Development (SMDD), Lilly Technology Center North, 1223 West Morris Street, Indianapolis, Indiana 46221, United States
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Li B, Li R, Dorff P, McWilliams JC, Guinn RM, Guinness SM, Han L, Wang K, Yu S. Deprotection of N-Boc Groups under Continuous-Flow High-Temperature Conditions. J Org Chem 2019; 84:4846-4855. [PMID: 30620880 DOI: 10.1021/acs.joc.8b02909] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The scope of thermolytic, N-Boc deprotection was studied on 26 compounds from the Pfizer compound library, representing a diverse set of structural moieties. Among these compounds, 12 substrates resulted in clean (≥95% product) deprotection, and an additional three compounds gave ≥90% product. The thermal de-Boc conditions were found to be compatible with a large number of functional groups. A combination of computational modeling, statistical analysis, and kinetic model fitting was used to support an initial, slow, and concerted proton transfer with release of isobutylene, followed by a rapid decarboxylation. A strong correlation was found to exist between the electrophilicity of the N-Boc carbonyl group and the reaction rate.
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Affiliation(s)
- Bryan Li
- Medicinal Science, Worldwide Research and Development , Pfizer Inc. , Eastern Point Road , Groton , Connecticut 06340 , United States
| | - Ruizhi Li
- Medicinal Science, Worldwide Research and Development , Pfizer Inc. , Eastern Point Road , Groton , Connecticut 06340 , United States
| | - Peter Dorff
- Medicinal Science, Worldwide Research and Development , Pfizer Inc. , Eastern Point Road , Groton , Connecticut 06340 , United States
| | - J Christopher McWilliams
- Medicinal Science, Worldwide Research and Development , Pfizer Inc. , Eastern Point Road , Groton , Connecticut 06340 , United States
| | - Robert M Guinn
- Medicinal Science, Worldwide Research and Development , Pfizer Inc. , Eastern Point Road , Groton , Connecticut 06340 , United States
| | - Steven M Guinness
- Medicinal Science, Worldwide Research and Development , Pfizer Inc. , Eastern Point Road , Groton , Connecticut 06340 , United States
| | - Lu Han
- Medicinal Science, Worldwide Research and Development , Pfizer Inc. , Eastern Point Road , Groton , Connecticut 06340 , United States
| | - Ke Wang
- Medicinal Science, Worldwide Research and Development , Pfizer Inc. , Eastern Point Road , Groton , Connecticut 06340 , United States
| | - Shu Yu
- Medicinal Science, Worldwide Research and Development , Pfizer Inc. , Eastern Point Road , Groton , Connecticut 06340 , United States
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