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Wu A, Yamamoto H. Super silyl-based stable protecting groups for both the C- and N-terminals of peptides: applied as effective hydrophobic tags in liquid-phase peptide synthesis. Chem Sci 2023; 14:5051-5061. [PMID: 37206381 PMCID: PMC10189889 DOI: 10.1039/d3sc01239e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Accepted: 04/14/2023] [Indexed: 05/21/2023] Open
Abstract
Tag-assisted liquid-phase peptide synthesis (LPPS) is one of the important processes in peptide synthesis in pharmaceutical discovery. Simple silyl groups have positive effects when incorporated in the tags due to their hydrophobic properties. Super silyl groups contain several simple silyl groups and play an important role in modern aldol reactions. In view of the unique structural architecture and hydrophobic properties of the super silyl groups, herein, two new types of stable super silyl-based groups (tris(trihexylsilyl)silyl group and propargyl super silyl group) were developed as hydrophobic tags to increase the solubility in organic solvents and the reactivity of peptides during LPPS. The tris(trihexylsilyl)silyl group can be installed at the C-terminal of the peptides in ester form and N-terminal in carbamate form for peptide synthesis and it is compatible with hydrogenation conditions (Cbz chemistry) and Fmoc-deprotection conditions (Fmoc chemistry). The propargyl super silyl group is acid-resistant, which is compatible with Boc chemistry. Both tags are complementary to each other. The preparation of these tags requires less steps than previously reported tags. Nelipepimut-S was synthesized successfully with different strategies using these two types of super silyl tags.
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Affiliation(s)
- An Wu
- Peptide Research Centre, Chubu University 1200 Matsumoto-cho Kasugai Aichi 487-8501 Japan
| | - Hisashi Yamamoto
- Peptide Research Centre, Chubu University 1200 Matsumoto-cho Kasugai Aichi 487-8501 Japan
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2
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Wu A, Ramakrishna I, Hattori T, Yamamoto H. Silicon-based hydrophobic tags applied in liquid-phase peptide synthesis: protected DRGN-1 and poly alanine chain synthesis. Org Biomol Chem 2022; 20:8685-8692. [DOI: 10.1039/d2ob01795d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Two types of silicon-based hydrophobic tags, including a siloxy group containing tag and an arylsilyl group containing tag, were developed for applying them in tag-assisted liquid-phase peptide synthesis (Tag LPPS) to synthesize long peptides.
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Affiliation(s)
- An Wu
- Peptide Research Centre, Chubu University, 1200 Matsumoto-cho, Kasugai, Aichi 487-8501, Japan
| | - Isai Ramakrishna
- Peptide Research Centre, Chubu University, 1200 Matsumoto-cho, Kasugai, Aichi 487-8501, Japan
| | - Tomohiro Hattori
- Peptide Research Centre, Chubu University, 1200 Matsumoto-cho, Kasugai, Aichi 487-8501, Japan
| | - Hisashi Yamamoto
- Peptide Research Centre, Chubu University, 1200 Matsumoto-cho, Kasugai, Aichi 487-8501, Japan
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3
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Xie W, Park SW, Jung H, Kim D, Baik MH, Chang S. Conjugate Addition of Perfluoroarenes to α,β-Unsaturated Carbonyls Enabled by an Alkoxide-Hydrosilane System: Implication of a Radical Pathway. J Am Chem Soc 2018; 140:9659-9668. [PMID: 29990423 DOI: 10.1021/jacs.8b05744] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Conjugate addition of organometallic reagents to α,β-unsaturated carbonyls is a key strategy for the construction of carbon-carbon bond in organic synthesis. Although direct C-H addition to unsaturated bonds via transition metal catalysis is explored in recent years, electron-deficient arenes that do not bear directing groups continue to be challenging. Herein we disclose the first example of a conjugate addition of perfluoroarenes to α,β-unsaturated carbonyls enabled by an alkoxide-hydrosilane system. The reaction is convenient to carry out at room temperature over a broad range of substrates and reactants to furnish synthetically versatile products in high to excellent yields. Mechanistic experiments in combination with computational studies suggest that a radical pathway is most likely operative in this transformation. The hypervalent silicate and silanide species, which are relevant to the proposed mechanism, were observed experimentally by NMR and single crystal X-ray diffraction analyses.
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Affiliation(s)
- Weilong Xie
- Center for Catalytic Hydrocarbon Functionalizations , Institute for Basic Science (IBS) , Daejeon 34141 , Republic of Korea.,Department of Chemistry , Korea Advanced Institute of Science & Technology (KAIST) , Daejeon 34141 , Republic of Korea
| | - Sung-Woo Park
- Center for Catalytic Hydrocarbon Functionalizations , Institute for Basic Science (IBS) , Daejeon 34141 , Republic of Korea.,Department of Chemistry , Korea Advanced Institute of Science & Technology (KAIST) , Daejeon 34141 , Republic of Korea
| | - Hoimin Jung
- Center for Catalytic Hydrocarbon Functionalizations , Institute for Basic Science (IBS) , Daejeon 34141 , Republic of Korea.,Department of Chemistry , Korea Advanced Institute of Science & Technology (KAIST) , Daejeon 34141 , Republic of Korea
| | - Dongwook Kim
- Center for Catalytic Hydrocarbon Functionalizations , Institute for Basic Science (IBS) , Daejeon 34141 , Republic of Korea.,Department of Chemistry , Korea Advanced Institute of Science & Technology (KAIST) , Daejeon 34141 , Republic of Korea
| | - Mu-Hyun Baik
- Center for Catalytic Hydrocarbon Functionalizations , Institute for Basic Science (IBS) , Daejeon 34141 , Republic of Korea.,Department of Chemistry , Korea Advanced Institute of Science & Technology (KAIST) , Daejeon 34141 , Republic of Korea
| | - Sukbok Chang
- Center for Catalytic Hydrocarbon Functionalizations , Institute for Basic Science (IBS) , Daejeon 34141 , Republic of Korea.,Department of Chemistry , Korea Advanced Institute of Science & Technology (KAIST) , Daejeon 34141 , Republic of Korea
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4
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Yuan Y, Zheng ZJ, Li L, Bai XF, Xu Z, Cui YM, Cao J, Yang KF, Xu LW. Silicon-based Bulky Group−Tuned Parallel Kinetic Resolution in Copper-Catalyzed 1,3-Dipolar Additions. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800220] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Yang Yuan
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University; Hangzhou 311121 People's Republic of China
| | - Zhan-Jiang Zheng
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University; Hangzhou 311121 People's Republic of China
| | - Li Li
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University; Hangzhou 311121 People's Republic of China
| | - Xing-Feng Bai
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University; Hangzhou 311121 People's Republic of China
- Suzhou Research Insititue and State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics; Chinese Academy of Sciences; Lanzhou People's Republic of China
| | - Zheng Xu
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University; Hangzhou 311121 People's Republic of China
| | - Yu-Ming Cui
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University; Hangzhou 311121 People's Republic of China
| | - Jian Cao
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University; Hangzhou 311121 People's Republic of China
| | - Ke-Fang Yang
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University; Hangzhou 311121 People's Republic of China
| | - Li-Wen Xu
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University; Hangzhou 311121 People's Republic of China
- Suzhou Research Insititue and State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics; Chinese Academy of Sciences; Lanzhou People's Republic of China
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5
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Yanai H, Kobayashi O, Takada K, Isono T, Satoh T, Matsumoto T. Sequential Mukaiyama-Michael reaction induced by carbon acids. Chem Commun (Camb) 2016; 52:3280-3. [PMID: 26734829 DOI: 10.1039/c5cc10115h] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In the presence of a strong carbon acid, the sequential Mukaiyama-Michael reaction using two different Michael acceptors proceeded and the reaction of ketene silyl acetal derived from EtOAc with α-pyrones as primal acceptors yielded the corresponding cyclic ketene silyl acetals, which were reactive enough to undergo the following reaction with second acceptors.
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Affiliation(s)
- Hikaru Yanai
- School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo 192-0392, Japan.
| | - Osamu Kobayashi
- School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo 192-0392, Japan.
| | - Kenji Takada
- Faculty of Engineering, Hokkaido University, Sapporo, Hokkaido 060-8628, Japan
| | - Takuya Isono
- Faculty of Engineering, Hokkaido University, Sapporo, Hokkaido 060-8628, Japan
| | - Toshifumi Satoh
- Faculty of Engineering, Hokkaido University, Sapporo, Hokkaido 060-8628, Japan
| | - Takashi Matsumoto
- School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo 192-0392, Japan.
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Li H, Korotkov A, Chapman CW, Eastman A, Wu J. Enantioselective Formal Syntheses of 11 Nuphar Alkaloids and Discovery of Potent Apoptotic Monomeric Analogues. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201600106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Hui Li
- Department of Chemistry; Dartmouth College; Hanover NH 03755 USA
| | | | - Charles W. Chapman
- Department of Pharmacology and Toxicology; Geisel School of Medicine; Lebanon NH 03756 USA
| | - Alan Eastman
- Department of Pharmacology and Toxicology; Geisel School of Medicine; Lebanon NH 03756 USA
| | - Jimmy Wu
- Department of Chemistry; Dartmouth College; Hanover NH 03755 USA
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7
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Li H, Korotkov A, Chapman CW, Eastman A, Wu J. Enantioselective Formal Syntheses of 11 Nuphar Alkaloids and Discovery of Potent Apoptotic Monomeric Analogues. Angew Chem Int Ed Engl 2016; 55:3509-13. [DOI: 10.1002/anie.201600106] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Revised: 01/14/2016] [Indexed: 12/21/2022]
Affiliation(s)
- Hui Li
- Department of Chemistry; Dartmouth College; Hanover NH 03755 USA
| | | | - Charles W. Chapman
- Department of Pharmacology and Toxicology; Geisel School of Medicine; Lebanon NH 03756 USA
| | - Alan Eastman
- Department of Pharmacology and Toxicology; Geisel School of Medicine; Lebanon NH 03756 USA
| | - Jimmy Wu
- Department of Chemistry; Dartmouth College; Hanover NH 03755 USA
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8
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Affiliation(s)
- Hui Li
- Department of Chemistry, Dartmouth College, Hanover, New Hampshire 03755, United States
| | - Jimmy Wu
- Department of Chemistry, Dartmouth College, Hanover, New Hampshire 03755, United States
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