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Pei BB, Wang J, Ji J, Chen Q, Wang CQ, Feng C. Radical Decarboxylation-Initiated S H2' Reaction of β,β-Difluoroenol Sulfonates: Access to α,α-Difluoroketones. Org Lett 2024. [PMID: 38796776 DOI: 10.1021/acs.orglett.4c01555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2024]
Abstract
Reported herein is a novel radical decarboxylation-initiated SH2' reaction of β,β-difluoroenol sulfonates. This transformation is characterized by mild reaction conditions, a broad substrate scope, and late-stage modification of drug molecules, providing general and mechanistically distinct access to bioactive and synthetically versatile α,α-difluoroketones. Preliminary mechanistic studies demonstrate that this reaction proceeds through a succession of silver-mediated decarboxylative radical generation and radical-addition-induced β-elimination of the sulfonyl radical.
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Affiliation(s)
- Bing-Bing Pei
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis (IAS), School of Chemistry and Molecular Engineering, State Key Laboratory of Material-Oriented Chemical Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing, Jiangsu 211816, China
| | - Jiali Wang
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis (IAS), School of Chemistry and Molecular Engineering, State Key Laboratory of Material-Oriented Chemical Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing, Jiangsu 211816, China
| | - Jiuyang Ji
- Capital Construction Office, Nanjing Tech University, 30 South Puzhu Road, Nanjing, Jiangsu 211816, China
| | - Qing Chen
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis (IAS), School of Chemistry and Molecular Engineering, State Key Laboratory of Material-Oriented Chemical Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing, Jiangsu 211816, China
| | - Cheng-Qiang Wang
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis (IAS), School of Chemistry and Molecular Engineering, State Key Laboratory of Material-Oriented Chemical Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing, Jiangsu 211816, China
| | - Chao Feng
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis (IAS), School of Chemistry and Molecular Engineering, State Key Laboratory of Material-Oriented Chemical Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing, Jiangsu 211816, China
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2
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Pujol M, Méndez M, Fernández E. Stereoselective Control of the Cu Activation of β,β-Diboryl Acrylates for Allylic Coupling Protocols with Concomitant Lactonization. Org Lett 2024; 26:2821-2826. [PMID: 38101420 PMCID: PMC11020160 DOI: 10.1021/acs.orglett.3c03640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 11/30/2023] [Accepted: 12/12/2023] [Indexed: 12/17/2023]
Abstract
The key to a successful C-B activation is to discriminate between two geminal boryl moieties that are exposed to the same reaction conditions. Here we describe a stereoselective C-B activation of β,β-diboryl acrylates forming exclusively the (Z)-α-borylalkenyl copper(I) key intermediate, for subsequent allylic alkylation reactions. The new borylated (Z)-skipped dienoates followed a feasible iodo-lactonization sequence for the preparation of borylated lactone cores, which can be used in drug discovery.
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Affiliation(s)
- Mireia Pujol
- Faculty
of Chemistry, University Rovira i Virgili, 43007 Tarragona, Spain
| | - María Méndez
- Sanofi
R&D, Integrated Drug Discovery, Industriepark Höchst, Building G838, 65926 Frankfurt am Main, Germany
| | - Elena Fernández
- Faculty
of Chemistry, University Rovira i Virgili, 43007 Tarragona, Spain
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3
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Tan K, He J, Mu Z, Ammar IM, Che C, Geng J, Xing Q. Visible-Light-Promoted C(sp 3)-C(sp 3) Cross-Coupling of Amino Acids and Aryl Trifluoromethyl Ketones Through Simultaneous Decarboxylation and Defluorination. Org Lett 2023. [PMID: 37991739 DOI: 10.1021/acs.orglett.3c03675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2023]
Abstract
A photoredox-catalyzed approach for the difluoroalkylation of amino acids was achieved through simultaneous decarboxylation and defluorination processes. This innovative protocol employs commonly available amino acids and trifluoroacetophenones as the primary starting materials, eliminating the necessity for preactivation. This strategy has enabled the synthesis of several difluoroketone functionalized amines in moderate to impressive yields. These synthesized compounds are presented as foundational molecules for subsequent modification. The underlying mechanism for the transformation is anchored in a single electron transfer (SET) radical pathway.
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Affiliation(s)
- Kui Tan
- Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518059, China
- Southern University of Science and Technology, Shenzhen 518055, China
| | - Jiaan He
- PolyAdvant, Shenzhen, 518000, China
| | | | - Ibrahim M Ammar
- Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518059, China
| | - Chao Che
- State Key Laboratory of Chemical Oncogenomics and Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055China
| | - Jin Geng
- Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518059, China
| | - Qi Xing
- Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518059, China
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Zhou M, Feng Z, Zhang X. Recent advances in the synthesis of fluorinated amino acids and peptides. Chem Commun (Camb) 2023; 59:1434-1448. [PMID: 36651307 DOI: 10.1039/d2cc06787k] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
The site-selective modification of amino acids, peptides, and proteins has always been an intensive topic in organic synthesis, medicinal chemistry, and chemical biology due to the vital role of amino acids in life. Among the developed methods, the site-selective introduction of fluorine functionalities into amino acids and peptides has emerged as a useful approach to change their physicochemical and biological properties. With the increasing demand for life science, the direct fluorination/fluoroalkylation of proteins has also received increasing attention because of the unique properties of fluorine atom(s) that can change the protein structure, increase their lipophilicity, and enable fluorine functionality as a biological tracer or probe for chemical biology studies. In this feature article, we summarized the recent advances in the synthesis of fluorinated amino acids and peptides, wherein two strategies have been discussed. One is based on the fluorinated building blocks to prepare fluorinated amino acids and peptides with diversified structures, including the transformations of fluorinated imines and nickel-catalyzed dicarbofunctionalization of alkenes with bromodifluoroacetate and its derivatives; the other is direct fluorination/fluoroakylation of amino acids, peptides, and proteins, in which the selective transformations of the functional groups on serine, threonine, tyrosine, tryptophan, and cysteine lead to a wide range of fluorinated α-amino acids, peptides, and proteins, featuring synthetic convenience and late-stage modification of biomacromolecules. These two strategies complement each other, wherein transition-metal catalysis and new fluoroalkylating reagents provide powerful tools to selectively access fluorinated amino acids, peptides, and proteins, showing the prospect of medicinal chemistry and chemical biology.
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Affiliation(s)
- Minqi Zhou
- College of Chemistry, Institute of Green Catalysis, Zhengzhou University, Zhengzhou 450001, P. R. China
| | - Zhang Feng
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China.
| | - Xingang Zhang
- College of Chemistry, Institute of Green Catalysis, Zhengzhou University, Zhengzhou 450001, P. R. China.,Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China.
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5
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Bao ZP, Zhang Y, Wu XF. Palladium-catalyzed difluoroalkylative carbonylation of styrenes toward difluoropentanedioates. Chem Sci 2022; 13:9387-9391. [PMID: 36093028 PMCID: PMC9384137 DOI: 10.1039/d2sc02665a] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Accepted: 07/21/2022] [Indexed: 11/25/2022] Open
Abstract
The introduction of fluorine atoms into organic molecules is an attractive but challenging topic. In this work, an interesting palladium-catalyzed difluoroalkylative carbonylation of aryl olefins has been developed. A wide range of aryl olefins were transformed into the corresponding difluoropentanedioate compounds with good functional-group tolerance and excellent regioselectivity. Inexpensive ethyl bromodifluoroacetate acts both as a difluoroalkyl precursor and a nucleophile here. Additionally, a scale-up reaction was also performed successfully, and further transformations of the obtained product were shown as well.
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Affiliation(s)
- Zhi-Peng Bao
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences 116023 Dalian Liaoning China
- Leibniz-Institut für Katalyse e.V. Albert-Einstein-Straße 29a 1 8059 Rostock Germany
| | - Youcan Zhang
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences 116023 Dalian Liaoning China
| | - Xiao-Feng Wu
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences 116023 Dalian Liaoning China
- Leibniz-Institut für Katalyse e.V. Albert-Einstein-Straße 29a 1 8059 Rostock Germany
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Qing B, Bai X, Huang L, Zhao J, Zhou P, Feng H. Vinyl fluorosulfonamide: a practical vinyl electrophilic reagent for mild and efficient synthesis of ketones under catalyst- and additive-free conditions. PHOSPHORUS SULFUR 2022. [DOI: 10.1080/10426507.2022.2085276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Bin Qing
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, China
| | - Xueying Bai
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, China
| | - Liliang Huang
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, China
| | - Jiahui Zhao
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, China
| | - Pengyu Zhou
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, China
| | - Huangdi Feng
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, China
- Shanghai Frontiers Science Research Center for Druggability of Cardiovascular Noncoding RNA, Institute for Frontier Medical Technology, Shanghai University of Engineering Science, Shanghai, China
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