151
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Zeng X, Yan W, Zacate SB, Cai A, Wang Y, Yang D, Yang K, Liu W. Copper-Catalyzed Deaminative Difluoromethylation. Angew Chem Int Ed Engl 2020; 59:16398-16403. [PMID: 32495485 DOI: 10.1002/anie.202006048] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Revised: 06/01/2020] [Indexed: 12/17/2022]
Abstract
The difluoromethyl group (CF2 H) is considered to be a lipophilic and metabolically stable bioisostere of an amino (NH2 ) group. Therefore, methods that can rapidly convert an NH2 group into a CF2 H group would be of great value to medicinal chemistry. We report herein an efficient Cu-catalyzed approach for the conversion of alkyl pyridinium salts, which can be readily synthesized from the corresponding alkyl amines, to their alkyl difluoromethane analogues. This method tolerates a broad range of functional groups and can be applied to the late-stage modification of complex amino-containing pharmaceuticals.
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Affiliation(s)
- Xiaojun Zeng
- Department of Chemistry and Biochemistry, Miami University, Oxford, OH, 45056, USA
| | - Wenhao Yan
- Department of Chemistry and Biochemistry, Miami University, Oxford, OH, 45056, USA
| | - Samson B Zacate
- Department of Chemistry and Biochemistry, Miami University, Oxford, OH, 45056, USA
| | - Aijie Cai
- Department of Chemistry and Biochemistry, Miami University, Oxford, OH, 45056, USA
| | - Yufei Wang
- Department of Chemistry and Biochemistry, Miami University, Oxford, OH, 45056, USA
| | - Dongqi Yang
- Department of Chemistry and Biochemistry, Miami University, Oxford, OH, 45056, USA
| | - Kundi Yang
- Department of Chemistry and Biochemistry, Miami University, Oxford, OH, 45056, USA
| | - Wei Liu
- Department of Chemistry and Biochemistry, Miami University, Oxford, OH, 45056, USA
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152
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Zeng X, Yan W, Zacate SB, Cai A, Wang Y, Yang D, Yang K, Liu W. Copper‐Catalyzed Deaminative Difluoromethylation. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202006048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Xiaojun Zeng
- Department of Chemistry and BiochemistryMiami University Oxford OH 45056 USA
| | - Wenhao Yan
- Department of Chemistry and BiochemistryMiami University Oxford OH 45056 USA
| | - Samson B. Zacate
- Department of Chemistry and BiochemistryMiami University Oxford OH 45056 USA
| | - Aijie Cai
- Department of Chemistry and BiochemistryMiami University Oxford OH 45056 USA
| | - Yufei Wang
- Department of Chemistry and BiochemistryMiami University Oxford OH 45056 USA
| | - Dongqi Yang
- Department of Chemistry and BiochemistryMiami University Oxford OH 45056 USA
| | - Kundi Yang
- Department of Chemistry and BiochemistryMiami University Oxford OH 45056 USA
| | - Wei Liu
- Department of Chemistry and BiochemistryMiami University Oxford OH 45056 USA
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153
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Yang Y, Xu C, Teng F, Li J. Dearomatization‐Enabled Visible‐Light‐Induced 1,2‐Alkylsulfonylation of Alkenes Using Sodium Sulfinates and Pyridinium Salts. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000457] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Yuan Yang
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources RecycleNanchang Hangkong University Nanchang 330063 People's Republic of China
- Key Laboratory of Chemical Biology & Traditional Chinese Medicine Research (Ministry of Education)Hunan Normal University Changsha 410081 People's Republic of China
| | - Chong‐Hui Xu
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources RecycleNanchang Hangkong University Nanchang 330063 People's Republic of China
- State Key Laboratory of Chemo/Biosensing and ChemometricsHunan University Changsha 410082 People's Republic of China
| | - Fan Teng
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources RecycleNanchang Hangkong University Nanchang 330063 People's Republic of China
| | - Jin‐Heng Li
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources RecycleNanchang Hangkong University Nanchang 330063 People's Republic of China
- State Key Laboratory of Chemo/Biosensing and ChemometricsHunan University Changsha 410082 People's Republic of China
- Key Laboratory of Chemical Biology & Traditional Chinese Medicine Research (Ministry of Education)Hunan Normal University Changsha 410081 People's Republic of China
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154
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Wang M, Shi Z. Methodologies and Strategies for Selective Borylation of C-Het and C-C Bonds. Chem Rev 2020; 120:7348-7398. [PMID: 32597639 DOI: 10.1021/acs.chemrev.9b00384] [Citation(s) in RCA: 177] [Impact Index Per Article: 44.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Organoborons have emerged as versatile building blocks in organic synthesis to achieve molecular diversity and as carboxylic acid bioisosteres with broad applicability in drug discovery. Traditionally, these compounds are prepared by the substitution of Grignard/lithium reagents with electrophilic boron species and Brown hydroboration. Recent developments have provided new routes for the efficient preparation of organoborons by applying reactions using chemical feedstocks with leaving groups. As compared to the previous methods that used organic halides (I, Br, and Cl), the direct borylation of less reactive C-Het and C-C bonds has become highly important to get efficiency and functional-group compatibility. This Review aims to provide a comprehensive overview of this topic, including (1) C-F bond borylation, (2) C-O bond borylation, (3) C-S bond borylation, (4) C-N bond borylation, and (5) C-C bond borylation. Considerable attention is given to the strategies and mechanisms involved. We expect that this Review will inspire chemists to discover more efficient transformations to expand this field.
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Affiliation(s)
- Minyan Wang
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Zhuangzhi Shi
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
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155
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Li J, Wang H, Qiu Z, Huang CY, Li CJ. Metal-Free Direct Deoxygenative Borylation of Aldehydes and Ketones. J Am Chem Soc 2020; 142:13011-13020. [DOI: 10.1021/jacs.0c03813] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Jianbin Li
- Department of Chemistry and FRQNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke Street W, Montreal, Quebec H3A 0B8, Canada
| | - Haining Wang
- Department of Chemistry and FRQNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke Street W, Montreal, Quebec H3A 0B8, Canada
| | - Zihang Qiu
- Department of Chemistry and FRQNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke Street W, Montreal, Quebec H3A 0B8, Canada
| | - Chia-Yu Huang
- Department of Chemistry and FRQNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke Street W, Montreal, Quebec H3A 0B8, Canada
| | - Chao-Jun Li
- Department of Chemistry and FRQNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke Street W, Montreal, Quebec H3A 0B8, Canada
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156
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Jin Y, Wu J, Lin Z, Lan Y, Wang C. Merger of C–F and C–N Bond Cleavage in Cross-Electrophile Coupling for the Synthesis of gem-Difluoroalkenes. Org Lett 2020; 22:5347-5352. [DOI: 10.1021/acs.orglett.0c01592] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Youxiang Jin
- Hefei National Laboratory for Physical Science at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Jiaoyang Wu
- Hefei National Laboratory for Physical Science at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Zhiyang Lin
- Hefei National Laboratory for Physical Science at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Yun Lan
- Hefei National Laboratory for Physical Science at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Chuan Wang
- Hefei National Laboratory for Physical Science at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
- Center for Excellence in Molecular Synthesis of CAS, Hefei, Anhui 230026, P. R. China
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157
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Oeschger R, Su B, Yu I, Ehinger C, Romero E, He S, Hartwig J. Diverse functionalization of strong alkyl C-H bonds by undirected borylation. Science 2020; 368:736-741. [PMID: 32409470 DOI: 10.1126/science.aba6146] [Citation(s) in RCA: 108] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Accepted: 04/05/2020] [Indexed: 12/21/2022]
Abstract
The selective functionalization of strong, typically inert carbon-hydrogen (C-H) bonds in organic molecules is changing synthetic chemistry. However, the undirected functionalization of primary C-H bonds without competing functionalization of secondary C-H bonds is rare. The borylation of alkyl C-H bonds has occurred previously with this selectivity, but slow rates required the substrate to be the solvent or in large excess. We report an iridium catalyst ligated by 2-methylphenanthroline with activity that enables, with the substrate as limiting reagent, undirected borylation of primary C-H bonds and, when primary C-H bonds are absent or blocked, borylation of strong secondary C-H bonds. Reactions at the resulting carbon-boron bond show how these borylations can lead to the installation of a wide range of carbon-carbon and carbon-heteroatom bonds at previously inaccessible positions of organic molecules.
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Affiliation(s)
- Raphael Oeschger
- Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720, USA
| | - Bo Su
- Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720, USA
| | - Isaac Yu
- Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720, USA
| | - Christian Ehinger
- Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720, USA
| | - Erik Romero
- Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720, USA
| | - Sam He
- Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720, USA
| | - John Hartwig
- Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720, USA.
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158
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Zhu F, Zhang SQ, Chen Z, Rui J, Hong X, Walczak MA. Catalytic and Photochemical Strategies to Stabilized Radicals Based on Anomeric Nucleophiles. J Am Chem Soc 2020; 142:11102-11113. [PMID: 32479072 DOI: 10.1021/jacs.0c03298] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Carbohydrates, one of the three primary macromolecules of living organisms, play significant roles in various biological processes such as intercellular communication, cell recognition, and immune activity. While the majority of established methods for the installation of carbohydrates through the anomeric carbon rely on nucleophilic displacement, anomeric radicals represent an attractive alternative because of their functional group compatibility and high anomeric selectivities. Herein, we demonstrate that anomeric nucleophiles such as C1 stannanes can be converted into anomeric radicals by merging Cu(I) catalysis with blue light irradiation to achieve highly stereoselective C(sp3)-S cross-coupling reactions. Mechanistic studies and DFT calculations revealed that the C-S bond-forming step occurs via the transfer of the anomeric radical directly to a sulfur electrophile bound to Cu(II) species. This pathway complements a radical chain observed for photochemical metal-free conditions where a disulfide initiator can be activated by a Lewis base additive. Both strategies utilize anomeric nucleophiles as efficient radical donors and achieve a switch from an ionic to a radical pathway. Taken together, the stability of glycosyl nucleophiles, a broad substrate scope, and high anomeric selectivities observed for the thermal and photochemical protocols make this novel C-S cross coupling a practical tool for late-stage glycodiversification of bioactive natural products and drug candidates.
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Affiliation(s)
- Feng Zhu
- Department of Chemistry, University of Colorado, Boulder, Colorado 80309, United States
| | - Shuo-Qing Zhang
- Department of Chemistry, Zhejiang University, 38 Zheda Road, Hangzhou, Zhejiang 310027, People's Republic of China
| | - Zhenhao Chen
- Department of Chemistry, University of Colorado, Boulder, Colorado 80309, United States
| | - Jinyan Rui
- Department of Chemistry, University of Colorado, Boulder, Colorado 80309, United States
| | - Xin Hong
- Department of Chemistry, Zhejiang University, 38 Zheda Road, Hangzhou, Zhejiang 310027, People's Republic of China
| | - Maciej A Walczak
- Department of Chemistry, University of Colorado, Boulder, Colorado 80309, United States
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159
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Wang J, Hoerrner ME, Watson MP, Weix DJ. Nickel‐Catalyzed Synthesis of Dialkyl Ketones from the Coupling of N‐Alkyl Pyridinium Salts with Activated Carboxylic Acids. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202002271] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Jiang Wang
- Department of Chemistry University of Wisconsin-Madison Madison WI 53706 USA
| | - Megan E. Hoerrner
- Department of Chemistry and Biochemistry University of Delaware Newark DE 19716 USA
| | - Mary P. Watson
- Department of Chemistry and Biochemistry University of Delaware Newark DE 19716 USA
| | - Daniel J. Weix
- Department of Chemistry University of Wisconsin-Madison Madison WI 53706 USA
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160
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Zhao JH, Zhou ZZ, Zhang Y, Su X, Chen XM, Liang YM. Visible-light-mediated borylation of aryl and alkyl halides with a palladium complex. Org Biomol Chem 2020; 18:4390-4394. [PMID: 32483581 DOI: 10.1039/d0ob00028k] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2024]
Abstract
Palladium catalyzed visible-light-mediated borylation of inactivated aryl and alkyl halides is reported; the method provided high yields and excellent functional group compatibility. Furthermore, arylsilicates were synthesized selectively using dimethylphenylsilyl boronic ester via changing the reaction conditions. Finally, the possible reaction mechanism is determined through fluorescence quenching and turn on/off experiments.
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Affiliation(s)
- Jia-Hui Zhao
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P.R. China.
| | - Zhao-Zhao Zhou
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P.R. China. and School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, P.R. China
| | - Yue Zhang
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P.R. China.
| | - Xuan Su
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P.R. China.
| | - Xi-Meng Chen
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, P.R. China
| | - Yong-Min Liang
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P.R. China.
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161
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Qi J, Zhang FL, Jin JK, Zhao Q, Li B, Liu LX, Wang YF. New Radical Borylation Pathways for Organoboron Synthesis Enabled by Photoredox Catalysis. Angew Chem Int Ed Engl 2020; 59:12876-12884. [PMID: 32232933 DOI: 10.1002/anie.201915619] [Citation(s) in RCA: 70] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Revised: 03/30/2020] [Indexed: 01/20/2023]
Abstract
Radical borylation using N-heterocyclic carbene (NHC)-BH3 complexes as boryl radical precursors has emerged as an important synthetic tool for organoboron assembly. However, the majority of reported methods are limited to reaction modes involving carbo- and/or hydroboration of specific alkenes and alkynes. Moreover, the generation of NHC-boryl radicals relies principally on hydrogen atom abstraction with the aid of radical initiators. A distinct radical generation method is reported, as well as the reaction pathways of NHC-boryl radicals enabled by photoredox catalysis. NHC-boryl radicals are generated via a single-electron oxidation and subsequently undergo cross-coupling with the in-situ-generated radical anions to yield gem-difluoroallylboronates. A photoredox-catalyzed radical arylboration reaction of alkenes was achieved using cyanoarenes as arylating components from which elaborated organoborons were accessed. Mechanistic studies verified the oxidative formation of NHC-boryl radicals through a single-electron-transfer pathway.
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Affiliation(s)
- Jing Qi
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Feng-Lian Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Ji-Kang Jin
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Qiang Zhao
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Bin Li
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Lin-Xuan Liu
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Yi-Feng Wang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China.,Center for Excellence in Molecular Synthesis of CAS, Hefei, 230026, China.,State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, China
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162
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Zhang W, Zou Z, Zhao W, Lu S, Wu Z, Huang M, Wang X, Wang Y, Liang Y, Zhu Y, Zheng Y, Pan Y. Integrated redox-active reagents for photoinduced regio- and stereoselective fluorocarboborylation. Nat Commun 2020; 11:2572. [PMID: 32444596 PMCID: PMC7244735 DOI: 10.1038/s41467-020-16477-1] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Accepted: 04/30/2020] [Indexed: 12/24/2022] Open
Abstract
Vinylboronates and alkylboronates are key components in variegated transformations in all facets of chemical science. The synthesis of vinylboronates and alkylboronates suffers from step-tedious and poor stereoselective procedures. We have developed a regulated radical difunctionalization strategy for the construction of fluorine-containing vinylboronates and alkylboronates with an integrated redox-active reagent IMDN-SO2RF. This bench-stable imidazolium sulfonate cationic salt offers a scalable and operational protocol for the fluoroalkylation-borylation of unsaturated hydrocarbons in a high regio- and stereoselective manner. The products can be further transformed into valuable fluorinated building blocks.
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Affiliation(s)
- Weigang Zhang
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, 210023, Nanjing, China
| | - Zhenlei Zou
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, 210023, Nanjing, China
| | - Wenxuan Zhao
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, 210023, Nanjing, China
| | - Shuo Lu
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, 210023, Nanjing, China
| | - Zhengguang Wu
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, 210023, Nanjing, China
| | - Mengjun Huang
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, 210023, Nanjing, China
| | - Xiaochen Wang
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, 210023, Nanjing, China
| | - Yi Wang
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, 210023, Nanjing, China.
| | - Yong Liang
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, 210023, Nanjing, China.
| | - Yi Zhu
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, 214122, Wuxi, Jiangsu, China.
| | - Youxuan Zheng
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, 210023, Nanjing, China
| | - Yi Pan
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, 210023, Nanjing, China
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163
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Tower SJ, Hetcher WJ, Myers TE, Kuehl NJ, Taylor MT. Selective Modification of Tryptophan Residues in Peptides and Proteins Using a Biomimetic Electron Transfer Process. J Am Chem Soc 2020; 142:9112-9118. [PMID: 32348670 DOI: 10.1021/jacs.0c03039] [Citation(s) in RCA: 68] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
We report here a photochemical process for the selective modification of tryptophan (Trp) residues in peptides and small proteins using electron-responsive N-carbamoylpyridinium salts and UV-B light. Preliminary mechanistic experiments suggest that the photoconjugation process proceeds through photoinduced electron transfer (PET) between Trp and the pyridinium salt, followed by fragmentation of the pyridinium N-N bond and concomitant transfer of this group to Trp. The reaction displays excellent site selectivity for Trp and is tolerant to other, redox-active amino-acid residues. Moreover, the reaction proceeds in pure aqueous conditions without the requirement of organic cosolvents or photocatalysts, is enhanced by glutathione, and operates efficiently over a wide range of peptide concentrations (10-700 μM). The scope of the process was explored through the labeling of 6-Trp-containing peptides and proteins ranging from 1 to 14 kDa. We demonstrate the versatility of the N-carbamoylpyridinium salt both by tuning the electrochemical and photochemical properties of the pyridinium scaffold to enable challenging photoconjugation reactions and by using the carbamoyl moiety to tether a plethora of productive functional groups, including reactive handles, purification tags, and removable protecting groups.
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Affiliation(s)
- Samantha J Tower
- University of Wyoming, Department of Chemistry, Laramie, Wyoming 82071, United States
| | - Wesley J Hetcher
- University of Wyoming, Department of Chemistry, Laramie, Wyoming 82071, United States
| | - Tyler E Myers
- University of Wyoming, Department of Chemistry, Laramie, Wyoming 82071, United States
| | - Nicholas J Kuehl
- University of Wyoming, Department of Chemistry, Laramie, Wyoming 82071, United States
| | - Michael T Taylor
- University of Wyoming, Department of Chemistry, Laramie, Wyoming 82071, United States
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164
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Schönbauer D, Sambiagio C, Noël T, Schnürch M. Photocatalytic deaminative benzylation and alkylation of tetrahydroisoquinolines with N-alkylpyrydinium salts. Beilstein J Org Chem 2020; 16:809-817. [PMID: 32395184 PMCID: PMC7189001 DOI: 10.3762/bjoc.16.74] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Accepted: 04/04/2020] [Indexed: 11/23/2022] Open
Abstract
A ruthenium-catalyzed photoredox coupling of substituted N-aryltetrahydroisoquinolines (THIQs) and different bench-stable pyridinium salts was successfully developed to give fast access to 1-benzyl-THIQs. Furthermore, secondary alkyl and allyl groups were also successfully introduced via the same method. Additionally, the typically applied N-phenyl group in the THIQ substrate could be replaced by the cleavable p-methoxyphenyl (PMP) group and successful N-deprotection was demonstrated.
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Affiliation(s)
- David Schönbauer
- Institute of Applied Synthetic Chemistry, TU Wien, Getreidemarkt 9/163, 1060 Vienna, Austria
| | - Carlo Sambiagio
- Department of Chemical Engineering and Chemistry, Micro Flow Chemistry and Synthetic Methodology, Eindhoven University of Technology, Den Dolech 2, 5612 AZ Eindhoven, The Netherlands
| | - Timothy Noël
- Department of Chemical Engineering and Chemistry, Micro Flow Chemistry and Synthetic Methodology, Eindhoven University of Technology, Den Dolech 2, 5612 AZ Eindhoven, The Netherlands
| | - Michael Schnürch
- Institute of Applied Synthetic Chemistry, TU Wien, Getreidemarkt 9/163, 1060 Vienna, Austria
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165
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Rössler SL, Jelier BJ, Magnier E, Dagousset G, Carreira EM, Togni A. Pyridinium Salts as Redox‐Active Functional Group Transfer Reagents. Angew Chem Int Ed Engl 2020; 59:9264-9280. [DOI: 10.1002/anie.201911660] [Citation(s) in RCA: 121] [Impact Index Per Article: 30.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Indexed: 12/14/2022]
Affiliation(s)
- Simon L. Rössler
- Department of Chemistry and Applied BiosciencesETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Switzerland
| | - Benson J. Jelier
- Department of Chemistry and Applied BiosciencesETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Switzerland
| | - Emmanuel Magnier
- Institut Lavoisier de VersaillesUMR 8180Université de Versailles-Saint-Quentin 78035 Versailles Cedex France
| | - Guillaume Dagousset
- Institut Lavoisier de VersaillesUMR 8180Université de Versailles-Saint-Quentin 78035 Versailles Cedex France
| | - Erick M. Carreira
- Department of Chemistry and Applied BiosciencesETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Switzerland
| | - Antonio Togni
- Department of Chemistry and Applied BiosciencesETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Switzerland
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166
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Rössler SL, Jelier BJ, Magnier E, Dagousset G, Carreira EM, Togni A. Pyridiniumsalze als redoxaktive Reagenzien zur Übertragung funktioneller Gruppen. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201911660] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Simon L. Rössler
- Departement Chemie und Angewandte BiowissenschaftenETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Schweiz
| | - Benson J. Jelier
- Departement Chemie und Angewandte BiowissenschaftenETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Schweiz
| | - Emmanuel Magnier
- Institut Lavoisier de VersaillesUMR 8180Université de Versailles-Saint-Quentin 78035 Versailles Cedex Frankreich
| | - Guillaume Dagousset
- Institut Lavoisier de VersaillesUMR 8180Université de Versailles-Saint-Quentin 78035 Versailles Cedex Frankreich
| | - Erick M. Carreira
- Departement Chemie und Angewandte BiowissenschaftenETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Schweiz
| | - Antonio Togni
- Departement Chemie und Angewandte BiowissenschaftenETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Schweiz
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167
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Pulikottil FT, Pilli R, Suku RV, Rasappan R. Nickel-Catalyzed Cross-Coupling of Alkyl Carboxylic Acid Derivatives with Pyridinium Salts via C-N Bond Cleavage. Org Lett 2020; 22:2902-2907. [PMID: 32216317 DOI: 10.1021/acs.orglett.0c00554] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The electrophile-electrophile cross-coupling of carboxylic acid derivatives and alkylpyridinium salts via C-N bond cleavage is developed. The method is distinguished by its simplicity and steers us through a variety of functionalized ketones in good to excellent yields. Besides acid chlorides, carboxylic acids were also employed as acylating agents, which enabled us to incorporate acid-sensitive functional groups such as MOM, BOC, and acetal. Control experiments with TEMPO revealed a radical pathway.
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Affiliation(s)
- Feba Thomas Pulikottil
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Vithura, Thiruvananthapuram, Kerala 695551, India
| | - Ramadevi Pilli
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Vithura, Thiruvananthapuram, Kerala 695551, India
| | - Rohith Valavil Suku
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Vithura, Thiruvananthapuram, Kerala 695551, India
| | - Ramesh Rasappan
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Vithura, Thiruvananthapuram, Kerala 695551, India
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168
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Crisenza GM, Mazzarella D, Melchiorre P. Synthetic Methods Driven by the Photoactivity of Electron Donor-Acceptor Complexes. J Am Chem Soc 2020; 142:5461-5476. [PMID: 32134647 PMCID: PMC7099579 DOI: 10.1021/jacs.0c01416] [Citation(s) in RCA: 501] [Impact Index Per Article: 125.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Indexed: 12/14/2022]
Abstract
The association of an electron-rich substrate with an electron-accepting molecule can generate a new molecular aggregate in the ground state, called an electron donor-acceptor (EDA) complex. Even when the two precursors do not absorb visible light, the resulting EDA complex often does. In 1952, Mulliken proposed a quantum-mechanical theory to rationalize the formation of such colored EDA complexes. However, and besides a few pioneering studies in the 20th century, it is only in the past few years that the EDA complex photochemistry has been recognized as a powerful strategy for expanding the potential of visible-light-driven radical synthetic chemistry. Here, we explain why this photochemical synthetic approach was overlooked for so long. We critically discuss the historical context, scientific reasons, serendipitous observations, and landmark discoveries that were essential for progress in the field. We also outline future directions and identify the key advances that are needed to fully exploit the potential of the EDA complex photochemistry.
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Affiliation(s)
- Giacomo
E. M. Crisenza
- ICIQ
− Institute of Chemical Research of Catalonia, Barcelona Institute of Science and Technology, Avinguda Països Catalans 16, 43007 Tarragona, Spain
| | - Daniele Mazzarella
- ICIQ
− Institute of Chemical Research of Catalonia, Barcelona Institute of Science and Technology, Avinguda Països Catalans 16, 43007 Tarragona, Spain
| | - Paolo Melchiorre
- ICIQ
− Institute of Chemical Research of Catalonia, Barcelona Institute of Science and Technology, Avinguda Països Catalans 16, 43007 Tarragona, Spain
- ICREA, Passeig Lluís Companys 23, 08010 Barcelona, Spain
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169
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Ma Y, Pang Y, Chabbra S, Reijerse EJ, Schnegg A, Niski J, Leutzsch M, Cornella J. Radical C-N Borylation of Aromatic Amines Enabled by a Pyrylium Reagent. Chemistry 2020; 26:3738-3743. [PMID: 31994764 PMCID: PMC7155052 DOI: 10.1002/chem.202000412] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Indexed: 11/25/2022]
Abstract
Herein, we report a radical borylation of aromatic amines through a homolytic C(sp2 )-N bond cleavage. This method capitalizes on a simple and mild activation via a pyrylium reagent (Sc Pyry-OTf) thus priming the amino group for reactivity. The combination of terpyridine and a diboron reagent triggers a radical reaction which cleaves the C(sp2 )-N bond and forges a new C(sp2 )-B bond. The unique non-planar structure of the pyridinium intermediate, provides the necessary driving force for the aryl radical formation. The method permits borylation of a wide variety of aromatic amines indistinctively of the electronic environment.
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Affiliation(s)
- Yuanhong Ma
- Max-Planck-Institut für KohlenforschungKaiser-Wilhelm-Platz 1Mülheim an der Ruhr45470Germany
| | - Yue Pang
- Max-Planck-Institut für KohlenforschungKaiser-Wilhelm-Platz 1Mülheim an der Ruhr45470Germany
| | - Sonia Chabbra
- Max-Planck-Institut für Chemische EnergiekonversionStiftstrasse 34–36Mülheim an der Ruhr45470Germany
| | - Edward J. Reijerse
- Max-Planck-Institut für Chemische EnergiekonversionStiftstrasse 34–36Mülheim an der Ruhr45470Germany
| | - Alexander Schnegg
- Max-Planck-Institut für Chemische EnergiekonversionStiftstrasse 34–36Mülheim an der Ruhr45470Germany
| | - Jan Niski
- Max-Planck-Institut für KohlenforschungKaiser-Wilhelm-Platz 1Mülheim an der Ruhr45470Germany
| | - Markus Leutzsch
- Max-Planck-Institut für KohlenforschungKaiser-Wilhelm-Platz 1Mülheim an der Ruhr45470Germany
| | - Josep Cornella
- Max-Planck-Institut für KohlenforschungKaiser-Wilhelm-Platz 1Mülheim an der Ruhr45470Germany
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170
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Wang C, Qi R, Xue H, Shen Y, Chang M, Chen Y, Wang R, Xu Z. Visible-Light-Promoted C(sp 3 )-H Alkylation by Intermolecular Charge Transfer: Preparation of Unnatural α-Amino Acids and Late-Stage Modification of Peptides. Angew Chem Int Ed Engl 2020; 59:7461-7466. [PMID: 32078758 DOI: 10.1002/anie.201914555] [Citation(s) in RCA: 99] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Revised: 02/16/2020] [Indexed: 02/03/2023]
Abstract
Disclosed herein is the visible-light-promoted deaminative C(sp3 )-H alkylation of glycine and peptides using Katritzky salts as electrophiles. Simple reaction conditions and excellent functional-group tolerance provide a general strategy for the efficient preparation of unnatural α-amino acids and precise modification of peptides with unnatural α-amino-acid residues. Mechanistic studies suggest that visible-light-promoted intermolecular charge transfer within a glycine-Katritzky salt electron donor-acceptor (EDA) complex induces a single-electron transfer process without the assistance of photocatalyst.
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Affiliation(s)
- Chao Wang
- Institute of Drug Design & Synthesis, Institute of Pharmacology, Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Science, Lanzhou University, 199 West Donggang Road, Lanzhou, 730000, China
| | - Rupeng Qi
- Institute of Drug Design & Synthesis, Institute of Pharmacology, Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Science, Lanzhou University, 199 West Donggang Road, Lanzhou, 730000, China
| | - Hongxiang Xue
- Institute of Biochemistry and Molecular Biology, School of Life Sciences, Lanzhou University, 222 South Tianshui Road, Lanzhou, 730000, China
| | - Yuxuan Shen
- Institute of Biochemistry and Molecular Biology, School of Life Sciences, Lanzhou University, 222 South Tianshui Road, Lanzhou, 730000, China
| | - Min Chang
- Institute of Biochemistry and Molecular Biology, School of Life Sciences, Lanzhou University, 222 South Tianshui Road, Lanzhou, 730000, China
| | - Yaqiong Chen
- Institute of Drug Design & Synthesis, Institute of Pharmacology, Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Science, Lanzhou University, 199 West Donggang Road, Lanzhou, 730000, China
| | - Rui Wang
- Institute of Drug Design & Synthesis, Institute of Pharmacology, Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Science, Lanzhou University, 199 West Donggang Road, Lanzhou, 730000, China
| | - Zhaoqing Xu
- Institute of Drug Design & Synthesis, Institute of Pharmacology, Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Science, Lanzhou University, 199 West Donggang Road, Lanzhou, 730000, China
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171
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Wang C, Qi R, Xue H, Shen Y, Chang M, Chen Y, Wang R, Xu Z. Visible‐Light‐Promoted C(sp
3
)−H Alkylation by Intermolecular Charge Transfer: Preparation of Unnatural α‐Amino Acids and Late‐Stage Modification of Peptides. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201914555] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Chao Wang
- Institute of Drug Design & SynthesisInstitute of PharmacologyKey Laboratory of Preclinical Study for New Drugs of Gansu ProvinceSchool of Basic Medical ScienceLanzhou University 199 West Donggang Road Lanzhou 730000 China
| | - Rupeng Qi
- Institute of Drug Design & SynthesisInstitute of PharmacologyKey Laboratory of Preclinical Study for New Drugs of Gansu ProvinceSchool of Basic Medical ScienceLanzhou University 199 West Donggang Road Lanzhou 730000 China
| | - Hongxiang Xue
- Institute of Biochemistry and Molecular BiologySchool of Life SciencesLanzhou University 222 South Tianshui Road Lanzhou 730000 China
| | - Yuxuan Shen
- Institute of Biochemistry and Molecular BiologySchool of Life SciencesLanzhou University 222 South Tianshui Road Lanzhou 730000 China
| | - Min Chang
- Institute of Biochemistry and Molecular BiologySchool of Life SciencesLanzhou University 222 South Tianshui Road Lanzhou 730000 China
| | - Yaqiong Chen
- Institute of Drug Design & SynthesisInstitute of PharmacologyKey Laboratory of Preclinical Study for New Drugs of Gansu ProvinceSchool of Basic Medical ScienceLanzhou University 199 West Donggang Road Lanzhou 730000 China
| | - Rui Wang
- Institute of Drug Design & SynthesisInstitute of PharmacologyKey Laboratory of Preclinical Study for New Drugs of Gansu ProvinceSchool of Basic Medical ScienceLanzhou University 199 West Donggang Road Lanzhou 730000 China
| | - Zhaoqing Xu
- Institute of Drug Design & SynthesisInstitute of PharmacologyKey Laboratory of Preclinical Study for New Drugs of Gansu ProvinceSchool of Basic Medical ScienceLanzhou University 199 West Donggang Road Lanzhou 730000 China
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172
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Sun S, Duan Y, Mega RS, Somerville RJ, Martin R. Site‐Selective 1,2‐Dicarbofunctionalization of Vinyl Boronates through Dual Catalysis. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201916279] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Shang‐Zheng Sun
- Institute of Chemical Research of Catalonia (ICIQ)The Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
- Universitat Rovira i VirgiliDepartament de Química Analítica i Química Orgànica c/Marcel lí Domingo, 1 43007 Tarragona Spain
| | - Yaya Duan
- Institute of Chemical Research of Catalonia (ICIQ)The Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
| | - Riccardo S. Mega
- Institute of Chemical Research of Catalonia (ICIQ)The Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
| | - Rosie J. Somerville
- Institute of Chemical Research of Catalonia (ICIQ)The Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
- Universitat Rovira i VirgiliDepartament de Química Analítica i Química Orgànica c/Marcel lí Domingo, 1 43007 Tarragona Spain
| | - Ruben Martin
- Institute of Chemical Research of Catalonia (ICIQ)The Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
- Catalan Institution for Research and Advanced Studies (ICREA) Passeig Lluïs Companys, 23 08010 Barcelona Spain
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173
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Kim I, Im H, Lee H, Hong S. N-Heterocyclic carbene-catalyzed deaminative cross-coupling of aldehydes with Katritzky pyridinium salts. Chem Sci 2020; 11:3192-3197. [PMID: 34122824 PMCID: PMC8157273 DOI: 10.1039/d0sc00225a] [Citation(s) in RCA: 93] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
By employing an N-heterocyclic carbene (NHC) catalyst, we developed a versatile catalytic system that enables deaminative cross-coupling reactions of aldehydes with redox-active pyridinium salts. Katritzky pyridinium salts behave as single-electron oxidants capable of generating alkyl radicals enabled by the redox properties of the enolate form of Breslow intermediates. The resultant alkyl radical undergoes efficient recombination with the NHC-bound aldehyde-derived carbonyl carbon radical for the formation of a C–C bond. The mild and transition metal-free reaction conditions tolerate a broad range of functional groups, and its utility has been further demonstrated by the modification of a series of peptide feedstocks and application to the three-component dicarbofunctionalization of olefins. By employing an N-heterocyclic carbene (NHC) catalyst, we developed a versatile catalytic system that enables deaminative cross-coupling reactions of aldehydes with redox-active pyridinium salts.![]()
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Affiliation(s)
- Inwon Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Korea .,Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS) Daejeon 34141 Korea
| | - Honggu Im
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Korea .,Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS) Daejeon 34141 Korea
| | - Hyeonyeong Lee
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Korea .,Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS) Daejeon 34141 Korea
| | - Sungwoo Hong
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Korea .,Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS) Daejeon 34141 Korea
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174
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Sun SZ, Duan Y, Mega RS, Somerville RJ, Martin R. Site-Selective 1,2-Dicarbofunctionalization of Vinyl Boronates through Dual Catalysis. Angew Chem Int Ed Engl 2020; 59:4370-4374. [PMID: 31910307 DOI: 10.1002/anie.201916279] [Citation(s) in RCA: 90] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 01/07/2020] [Indexed: 01/05/2023]
Abstract
A modular, site-selective 1,2-dicarbofunctionalization of vinyl boronates with organic halides through dual catalysis is described. This reaction proceeds under mild conditions and is characterized by excellent chemo- and regioselectivity. It thus represents a complementary new technique for preparing densely functionalized alkyl boron architectures from simple and accessible precursors.
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Affiliation(s)
- Shang-Zheng Sun
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain.,Universitat Rovira i Virgili, Departament de Química Analítica i Química Orgànica, c/Marcel lí Domingo, 1, 43007, Tarragona, Spain
| | - Yaya Duan
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain
| | - Riccardo S Mega
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain
| | - Rosie J Somerville
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain.,Universitat Rovira i Virgili, Departament de Química Analítica i Química Orgànica, c/Marcel lí Domingo, 1, 43007, Tarragona, Spain
| | - Ruben Martin
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain.,Catalan Institution for Research and Advanced Studies (ICREA), Passeig Lluïs Companys, 23, 08010, Barcelona, Spain
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175
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Mathi GR, Jeong Y, Moon Y, Hong S. Photochemical Carbopyridylation of Alkenes Using
N
‐Alkenoxypyridinium Salts as Bifunctional Reagents. Angew Chem Int Ed Engl 2020; 59:2049-2054. [DOI: 10.1002/anie.201913320] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Revised: 11/11/2019] [Indexed: 02/05/2023]
Affiliation(s)
- Gangadhar Rao Mathi
- Center for Catalytic Hydrocarbon FunctionalizationsInstitute for Basic Science (IBS) Daejeon 34141 Republic of Korea
- Department of ChemistryKorea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea
| | - Yujin Jeong
- Center for Catalytic Hydrocarbon FunctionalizationsInstitute for Basic Science (IBS) Daejeon 34141 Republic of Korea
- Department of ChemistryKorea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea
| | - Yonghoon Moon
- Center for Catalytic Hydrocarbon FunctionalizationsInstitute for Basic Science (IBS) Daejeon 34141 Republic of Korea
- Department of ChemistryKorea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea
| | - Sungwoo Hong
- Center for Catalytic Hydrocarbon FunctionalizationsInstitute for Basic Science (IBS) Daejeon 34141 Republic of Korea
- Department of ChemistryKorea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea
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176
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Leitch JA, Rogova T, Duarte F, Dixon DJ. Dearomative Photocatalytic Construction of Bridged 1,3‐Diazepanes. Angew Chem Int Ed Engl 2020; 59:4121-4130. [DOI: 10.1002/anie.201914390] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Revised: 12/04/2019] [Indexed: 12/26/2022]
Affiliation(s)
- Jamie A. Leitch
- Department of Chemistry Chemical Research Laboratory University of Oxford 12 Mansfield Road Oxford UK
| | - Tatiana Rogova
- Department of Chemistry Chemical Research Laboratory University of Oxford 12 Mansfield Road Oxford UK
| | - Fernanda Duarte
- Department of Chemistry Chemical Research Laboratory University of Oxford 12 Mansfield Road Oxford UK
| | - Darren J. Dixon
- Department of Chemistry Chemical Research Laboratory University of Oxford 12 Mansfield Road Oxford UK
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177
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Leitch JA, Rogova T, Duarte F, Dixon DJ. Dearomative Photocatalytic Construction of Bridged 1,3‐Diazepanes. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201914390] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Jamie A. Leitch
- Department of Chemistry Chemical Research Laboratory University of Oxford 12 Mansfield Road Oxford UK
| | - Tatiana Rogova
- Department of Chemistry Chemical Research Laboratory University of Oxford 12 Mansfield Road Oxford UK
| | - Fernanda Duarte
- Department of Chemistry Chemical Research Laboratory University of Oxford 12 Mansfield Road Oxford UK
| | - Darren J. Dixon
- Department of Chemistry Chemical Research Laboratory University of Oxford 12 Mansfield Road Oxford UK
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178
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Zhang L, Wu Z, Jiao L. Photoinduced Radical Borylation of Alkyl Bromides Catalyzed by 4‐Phenylpyridine. Angew Chem Int Ed Engl 2020; 59:2095-2099. [DOI: 10.1002/anie.201912564] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Revised: 11/01/2019] [Indexed: 12/14/2022]
Affiliation(s)
- Li Zhang
- Center of Basic Molecular Science (CBMS)Department of ChemistryTsinghua University Beijing 100084 China
| | - Zhong‐Qian Wu
- Center of Basic Molecular Science (CBMS)Department of ChemistryTsinghua University Beijing 100084 China
| | - Lei Jiao
- Center of Basic Molecular Science (CBMS)Department of ChemistryTsinghua University Beijing 100084 China
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179
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Zhao X, Li B, Xia W. Visible-Light-Promoted Photocatalyst-Free Hydroacylation and Diacylation of Alkenes Tuned by NiCl2·DME. Org Lett 2020; 22:1056-1061. [DOI: 10.1021/acs.orglett.9b04595] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xinxin Zhao
- State Key Lab of Urban Water Resource and Environment, School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Bing Li
- State Key Lab of Urban Water Resource and Environment, School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Wujiong Xia
- State Key Lab of Urban Water Resource and Environment, School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
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180
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Jin S, Dang HT, Haug GC, He R, Nguyen VD, Nguyen VT, Arman HD, Schanze KS, Larionov OV. Visible Light-Induced Borylation of C-O, C-N, and C-X Bonds. J Am Chem Soc 2020; 142:1603-1613. [PMID: 31899630 PMCID: PMC7137638 DOI: 10.1021/jacs.9b12519] [Citation(s) in RCA: 89] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Boronic acids are centrally important functional motifs and synthetic precursors. Visible light-induced borylation may provide access to structurally diverse boronates, but a broadly efficient photocatalytic borylation method that can effect borylation of a wide range of substrates, including strong C-O bonds, remains elusive. Herein, we report a general, metal-free visible light-induced photocatalytic borylation platform that enables borylation of electron-rich derivatives of phenols and anilines, chloroarenes, as well as other haloarenes. The reaction exhibits excellent functional group tolerance, as demonstrated by the borylation of a range of structurally complex substrates. Remarkably, the reaction is catalyzed by phenothiazine, a simple organic photocatalyst with MW < 200 that mediates the previously unachievable visible light-induced single electron reduction of phenol derivatives with reduction potentials as negative as approximately - 3 V versus SCE by a proton-coupled electron transfer mechanism. Mechanistic studies point to the crucial role of the photocatalyst-base interaction.
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Affiliation(s)
- Shengfei Jin
- Department of Chemistry , University of Texas at San Antonio , San Antonio , Texas 78249 , United States
| | - Hang T Dang
- Department of Chemistry , University of Texas at San Antonio , San Antonio , Texas 78249 , United States
| | - Graham C Haug
- Department of Chemistry , University of Texas at San Antonio , San Antonio , Texas 78249 , United States
| | - Ru He
- Department of Chemistry , University of Texas at San Antonio , San Antonio , Texas 78249 , United States
- Department of Chemistry , University of Florida , Gainesville , Florida 32611 , United States
| | - Viet D Nguyen
- Department of Chemistry , University of Texas at San Antonio , San Antonio , Texas 78249 , United States
| | - Vu T Nguyen
- Department of Chemistry , University of Texas at San Antonio , San Antonio , Texas 78249 , United States
| | - Hadi D Arman
- Department of Chemistry , University of Texas at San Antonio , San Antonio , Texas 78249 , United States
| | - Kirk S Schanze
- Department of Chemistry , University of Texas at San Antonio , San Antonio , Texas 78249 , United States
| | - Oleg V Larionov
- Department of Chemistry , University of Texas at San Antonio , San Antonio , Texas 78249 , United States
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181
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Yu CG, Matsuo Y. Nickel-Catalyzed Deaminative Acylation of Activated Aliphatic Amines with Aromatic Amides via C-N Bond Activation. Org Lett 2020; 22:950-955. [PMID: 31961696 DOI: 10.1021/acs.orglett.9b04497] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Deaminative functionalization of aliphatic primary amines has great synthetic utility. Herein, we describe a Ni-catalyzed reductive deaminative cross-electrophile coupling reaction between Katritzky salts and aromatic amides. This work provides examples of the synthesis of various ketones from alkylpyridinium salts, including both primary and secondary alkylamines. Given its mild reaction conditions and high functional group tolerance, this cross-coupling strategy is expected to be useful for late-stage functionalization of complex compounds.
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Affiliation(s)
- Chu-Guo Yu
- Hefei National Laboratory for Physical Sciences at Microscale, and Department of Chemistry, School of Chemistry and Materials Science , University of Science and Technology of China , 96 Jinzhai Road , Hefei , Anhui 230026 , China
| | - Yutaka Matsuo
- Hefei National Laboratory for Physical Sciences at Microscale, and Department of Chemistry, School of Chemistry and Materials Science , University of Science and Technology of China , 96 Jinzhai Road , Hefei , Anhui 230026 , China.,Institute of Materials Innovation, Institutes of Innovation for Future Society , Nagoya University , Furo-cho, Chikusa-ku , Nagoya 464-8603 , Japan
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182
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Asskar G, Rivard M, Martens T. Glutaconaldehyde as an Alternative Reagent to the Zincke Salt for the Transformation of Primary Amines into Pyridinium Salts. J Org Chem 2020; 85:1232-1239. [PMID: 31834800 DOI: 10.1021/acs.joc.9b02538] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
In the presence of amines, the degradation of glutaconaldehyde in acidic medium can be prevented. By exploitation of this behavior, primary amines are transformed into their corresponding pyridinium salts, including those substrates that remain unreactive toward the Zincke salt, which is the reagent typically used to perform this transformation. The use of glutaconaldehyde also allows control of the nature of the counterion of the pyridinium with no need for additional salt metathesis reaction.
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Affiliation(s)
- Ghada Asskar
- ICMPE (UMR 7182), CNRS, UPEC , Université Paris Est , 94320 Thiais , France
| | - Michael Rivard
- ICMPE (UMR 7182), CNRS, UPEC , Université Paris Est , 94320 Thiais , France
| | - Thierry Martens
- ICMPE (UMR 7182), CNRS, UPEC , Université Paris Est , 94320 Thiais , France
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183
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Mandal D, Gupta R, Jaiswal AK, Young RD. Frustrated Lewis-Pair-Meditated Selective Single Fluoride Substitution in Trifluoromethyl Groups. J Am Chem Soc 2020; 142:2572-2578. [DOI: 10.1021/jacs.9b12167] [Citation(s) in RCA: 67] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Dipendu Mandal
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543
| | - Richa Gupta
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543
| | - Amit K. Jaiswal
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543
| | - Rowan D. Young
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543
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184
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Zhao F, Li CL, Wu XF. Deaminative carbonylative coupling of alkylamines with styrenes under transition-metal-free conditions. Chem Commun (Camb) 2020; 56:9182-9185. [DOI: 10.1039/d0cc04062b] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Transition-metal-free deaminative carbonylation through C–N bonds activation via Katritzky salts has been successful developed. Various α,β-unsaturated ketones were obtained in moderate to good yields with alkylamines and styrenes as the substrates.
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Affiliation(s)
- Fengqian Zhao
- Leibniz-Institut für Katalyse e. V. an der Universität Rostock
- 18059 Rostock
- Germany
| | - Chong-Liang Li
- Leibniz-Institut für Katalyse e. V. an der Universität Rostock
- 18059 Rostock
- Germany
- Department of Chemistry
- Zhejiang Sci-Tech University
| | - Xiao-Feng Wu
- Leibniz-Institut für Katalyse e. V. an der Universität Rostock
- 18059 Rostock
- Germany
- Department of Chemistry
- Zhejiang Sci-Tech University
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185
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Ma G, Chen C, Talukdar S, Zhao X, Lei C, Gong H. Metal catalyst-free photo-induced alkyl C–O bond borylation. Chem Commun (Camb) 2020; 56:10219-10222. [DOI: 10.1039/d0cc04776g] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Tertiary alkyl boronates were prepared via the C–O bond borylation of the corresponding oxalates under catalyst-free/(DMF)2–B2cat2 initiated visible light-induced conditions.
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Affiliation(s)
- Guobin Ma
- Center for Supramolecular Chemistry and Catalysis, Department of Chemistry and Department of Physics and Institute for the Conservation of Cultural Heritage
- Shanghai University
- Shanghai 200444
- China
| | - Changzhou Chen
- Center for Supramolecular Chemistry and Catalysis, Department of Chemistry and Department of Physics and Institute for the Conservation of Cultural Heritage
- Shanghai University
- Shanghai 200444
- China
| | - Sangita Talukdar
- Center for Supramolecular Chemistry and Catalysis, Department of Chemistry and Department of Physics and Institute for the Conservation of Cultural Heritage
- Shanghai University
- Shanghai 200444
- China
| | - Xinluo Zhao
- Center for Supramolecular Chemistry and Catalysis, Department of Chemistry and Department of Physics and Institute for the Conservation of Cultural Heritage
- Shanghai University
- Shanghai 200444
- China
| | - Chuanhu Lei
- Center for Supramolecular Chemistry and Catalysis, Department of Chemistry and Department of Physics and Institute for the Conservation of Cultural Heritage
- Shanghai University
- Shanghai 200444
- China
| | - Hegui Gong
- Center for Supramolecular Chemistry and Catalysis, Department of Chemistry and Department of Physics and Institute for the Conservation of Cultural Heritage
- Shanghai University
- Shanghai 200444
- China
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186
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Huang Y, Jia J, Huang QP, Zhao L, Wang P, Gu J, He CY. Visible light promoted deaminative difluoroalkylation of aliphatic amines with difluoroenoxysilanes. Chem Commun (Camb) 2020; 56:14247-14250. [DOI: 10.1039/d0cc05725h] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A visible light promoted deaminative strategy for the difluoroalkylation reaction utilizing pyridinium-activated aliphatic primary amines and difluoroenoxysilane as substrates has been developed.
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Affiliation(s)
- Yang Huang
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province
- Generic Drug Research Center of Guizhou Province
- School of Pharmacy
- Zunyi Medical University
- Zunyi
| | - Jia Jia
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province
- Generic Drug Research Center of Guizhou Province
- School of Pharmacy
- Zunyi Medical University
- Zunyi
| | - Qi-Ping Huang
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province
- Generic Drug Research Center of Guizhou Province
- School of Pharmacy
- Zunyi Medical University
- Zunyi
| | - Liang Zhao
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province
- Generic Drug Research Center of Guizhou Province
- School of Pharmacy
- Zunyi Medical University
- Zunyi
| | - Pan Wang
- Department of Nuclear Medicine
- Affiliated Hospital of Zunyi Medical University
- Zunyi
- P. R. China
| | - Jiwei Gu
- School of Medicine
- Washington University in St. Louis
- St. Louis
- USA
| | - Chun-Yang He
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province
- Generic Drug Research Center of Guizhou Province
- School of Pharmacy
- Zunyi Medical University
- Zunyi
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187
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Hong L, Spielmeyer A, Pfeiffer J, Wegner HA. Domino lignin depolymerization and reconnection to complex molecules mediated by boryl radicals. Catal Sci Technol 2020. [DOI: 10.1039/d0cy00558d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Lignin has been demonstrated as a source of complex molecules via a boryl-mediated domino degradation/reconnection process.
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Affiliation(s)
- Longcheng Hong
- Institute of Organic Chemistry
- Justus Liebig University
- 35392 Gießen
- Germany
- Center for Materials Research (LaMa)
| | - Astrid Spielmeyer
- Institute of Food Chemistry and Food Biotechnology
- Justus Liebig University
- 35392 Gießen
- Germany
| | - Janin Pfeiffer
- Institute of Food Chemistry and Food Biotechnology
- Justus Liebig University
- 35392 Gießen
- Germany
| | - Hermann A. Wegner
- Institute of Organic Chemistry
- Justus Liebig University
- 35392 Gießen
- Germany
- Center for Materials Research (LaMa)
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188
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M. Correia JT, A. Fernandes V, Matsuo BT, C. Delgado JA, de Souza WC, Paixão MW. Photoinduced deaminative strategies: Katritzky salts as alkyl radical precursors. Chem Commun (Camb) 2020; 56:503-514. [DOI: 10.1039/c9cc08348k] [Citation(s) in RCA: 79] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Primary amines are one of the most predominant functional groups found in organic molecules. This review covers the most recent developments on photocatalytic deaminative strategies by using Katritzky Salts as alkyl radical reservoirs.
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Affiliation(s)
- José Tiago M. Correia
- Centre of Excellence for Research in Sustainable Chemistry (CERSusChem)
- Department of Chemistry
- Federal University of São Carlos – UFSCar
- São Paulo
- Brazil
| | - Vitor A. Fernandes
- Centre of Excellence for Research in Sustainable Chemistry (CERSusChem)
- Department of Chemistry
- Federal University of São Carlos – UFSCar
- São Paulo
- Brazil
| | - Bianca T. Matsuo
- Centre of Excellence for Research in Sustainable Chemistry (CERSusChem)
- Department of Chemistry
- Federal University of São Carlos – UFSCar
- São Paulo
- Brazil
| | - José A. C. Delgado
- Centre of Excellence for Research in Sustainable Chemistry (CERSusChem)
- Department of Chemistry
- Federal University of São Carlos – UFSCar
- São Paulo
- Brazil
| | - Wanderson C. de Souza
- Centre of Excellence for Research in Sustainable Chemistry (CERSusChem)
- Department of Chemistry
- Federal University of São Carlos – UFSCar
- São Paulo
- Brazil
| | - Márcio Weber Paixão
- Centre of Excellence for Research in Sustainable Chemistry (CERSusChem)
- Department of Chemistry
- Federal University of São Carlos – UFSCar
- São Paulo
- Brazil
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189
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Das KK, Paul S, Panda S. Transition metal-free synthesis of alkyl pinacol boronates. Org Biomol Chem 2020; 18:8939-8974. [DOI: 10.1039/d0ob01721c] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
This review systematically outlined the research in the area of transition metal free synthesis of alkyl pinacol boronates, which are versatile and important scaffolds to construct diverse organic compounds.
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Affiliation(s)
- Kanak Kanti Das
- Department of Chemistry
- Indian Institute of Technology Kharagpur
- Kharagpur 721302
- India
| | - Swagata Paul
- Department of Chemistry
- Indian Institute of Technology Kharagpur
- Kharagpur 721302
- India
| | - Santanu Panda
- Department of Chemistry
- Indian Institute of Technology Kharagpur
- Kharagpur 721302
- India
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190
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Fu Y, Li MP, Shi CZ, Li FR, Du Z, Huo C. Double C-N bond cleavages of N-alkyl 4-oxopiperidinium salts: access to unsymmetrical tertiary sulfonamides. Org Biomol Chem 2019; 17:10172-10177. [PMID: 31755519 DOI: 10.1039/c9ob02107h] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
In this paper, regiospecific, double intraannular C-N bond cleavages of N-alkyl 4-oxopiperidinium salts are presented. The reaction sequence involves a charge-transfer complex, in situ formed between sulfonyl chloride and N-methylmorpholine, which induces S-Cl bond homolysis of sulfonyl chloride, yielding a reactive sulfonyl radical that further induces the double C-N bond cleavages of N-alkyl 4-oxopiperidinium salt. The secondary amine thus produced was trapped by sulfonyl chloride to yield the desired sulfonamide product. The key feature of this protocol is that two intraannular C-N bonds of the 4-oxopiperidine ring are cleaved in one step under metal- and oxidant-free conditions.
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Affiliation(s)
- Ying Fu
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, 730070, China.
| | - Ming-Peng Li
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, 730070, China.
| | - Chun-Zhao Shi
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, 730070, China.
| | - Fang-Rong Li
- Pharmacy Department, Gansu University of Traditional Chinese Medicine, 743000, China
| | - Zhengyin Du
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, 730070, China.
| | - Congde Huo
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, 730070, China.
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191
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Wu J, Bär RM, Guo L, Noble A, Aggarwal VK. Photoinduced Deoxygenative Borylations of Aliphatic Alcohols. Angew Chem Int Ed Engl 2019; 58:18830-18834. [PMID: 31613033 DOI: 10.1002/anie.201910051] [Citation(s) in RCA: 79] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Revised: 10/14/2019] [Indexed: 01/14/2023]
Abstract
A photochemical method for converting aliphatic alcohols into boronic esters is described. Preactivation of the alcohol as a 2-iodophenyl-thionocarbonate enables a novel Barton-McCombie-type radical deoxygenation that proceeds efficiently with visible light irradiation and without the requirement for a photocatalyst, a radical initiator, or tin or silicon hydrides. The resultant alkyl radical is intercepted by bis(catecholato)diboron, furnishing boronic esters from a diverse range of structurally complex alcohols.
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Affiliation(s)
- Jingjing Wu
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK
| | - Robin M Bär
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK
| | - Lin Guo
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK
| | - Adam Noble
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK
| | - Varinder K Aggarwal
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK
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192
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Wei D, Liu TM, Zhou B, Han B. Decarboxylative Borylation of mCPBA-Activated Aliphatic Acids. Org Lett 2019; 22:234-238. [DOI: 10.1021/acs.orglett.9b04218] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Dian Wei
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Tu-Ming Liu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Bo Zhou
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Bing Han
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
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193
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Ho HE, Pagano A, Rossi-Ashton JA, Donald JR, Epton RG, Churchill JC, James MJ, O'Brien P, Taylor RJK, Unsworth WP. Visible-light-induced intramolecular charge transfer in the radical spirocyclisation of indole-tethered ynones. Chem Sci 2019; 11:1353-1360. [PMID: 34123259 PMCID: PMC8148050 DOI: 10.1039/c9sc05311e] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Indole-tethered ynones form an intramolecular electron donor–acceptor complex that can undergo visible-light-induced charge transfer to promote thiyl radical generation from thiols. This initiates a novel radical chain sequence, based on dearomatising spirocyclisation with concomitant C–S bond formation. Sulfur-containing spirocycles are formed in high yields using this simple and mild synthetic protocol, in which neither transition metal catalysts nor photocatalysts are required. The proposed mechanism is supported by various mechanistic studies, and the unusual radical initiation mode represents only the second report of the use of an intramolecular electron donor–acceptor complex in synthesis. Indole-tethered ynones form an intramolecular electron donor–acceptor complex that can undergo visible-light-induced charge transfer to promote thiyl radical generation from thiols.![]()
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Affiliation(s)
- Hon Eong Ho
- Department of Chemistry, University of York York YO10 5DD UK
| | - Angela Pagano
- Department of Chemistry and Industrial Chemistry, University of Genova via Dodecaneso, 31 16146 Genova Italy
| | | | - James R Donald
- Department of Chemistry, University of York York YO10 5DD UK
| | - Ryan G Epton
- Department of Chemistry, University of York York YO10 5DD UK
| | | | - Michael J James
- Department of Chemistry, University of York York YO10 5DD UK
| | - Peter O'Brien
- Department of Chemistry, University of York York YO10 5DD UK
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194
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Zhang L, Wu Z, Jiao L. Photoinduced Radical Borylation of Alkyl Bromides Catalyzed by 4‐Phenylpyridine. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201912564] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Li Zhang
- Center of Basic Molecular Science (CBMS)Department of ChemistryTsinghua University Beijing 100084 China
| | - Zhong‐Qian Wu
- Center of Basic Molecular Science (CBMS)Department of ChemistryTsinghua University Beijing 100084 China
| | - Lei Jiao
- Center of Basic Molecular Science (CBMS)Department of ChemistryTsinghua University Beijing 100084 China
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195
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Mathi GR, Jeong Y, Moon Y, Hong S. Photochemical Carbopyridylation of Alkenes Using
N
‐Alkenoxypyridinium Salts as Bifunctional Reagents. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201913320] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Gangadhar Rao Mathi
- Center for Catalytic Hydrocarbon FunctionalizationsInstitute for Basic Science (IBS) Daejeon 34141 Republic of Korea
- Department of ChemistryKorea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea
| | - Yujin Jeong
- Center for Catalytic Hydrocarbon FunctionalizationsInstitute for Basic Science (IBS) Daejeon 34141 Republic of Korea
- Department of ChemistryKorea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea
| | - Yonghoon Moon
- Center for Catalytic Hydrocarbon FunctionalizationsInstitute for Basic Science (IBS) Daejeon 34141 Republic of Korea
- Department of ChemistryKorea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea
| | - Sungwoo Hong
- Center for Catalytic Hydrocarbon FunctionalizationsInstitute for Basic Science (IBS) Daejeon 34141 Republic of Korea
- Department of ChemistryKorea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea
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196
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Srimontree W, Guo L, Rueping M. Hydride Transfer Enables the Nickel‐Catalyzed
ipso
‐Borylation and Silylation of Aldehydes. Chemistry 2019; 26:423-427. [DOI: 10.1002/chem.201904842] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Indexed: 11/08/2022]
Affiliation(s)
- Watchara Srimontree
- Institute of Organic ChemistryRWTH Aachen University Landoltweg 1 52074 Aachen Germany
| | - Lin Guo
- Institute of Organic ChemistryRWTH Aachen University Landoltweg 1 52074 Aachen Germany
| | - Magnus Rueping
- Institute of Organic ChemistryRWTH Aachen University Landoltweg 1 52074 Aachen Germany
- Kaust Catalysis Center (KCC)King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia
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197
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Baker KM, Lucas Baca D, Plunkett S, Daneker ME, Watson MP. Engaging Alkenes and Alkynes in Deaminative Alkyl-Alkyl and Alkyl-Vinyl Cross-Couplings of Alkylpyridinium Salts. Org Lett 2019; 21:9738-9741. [PMID: 31763855 DOI: 10.1021/acs.orglett.9b03899] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
An alkyl-alkyl cross-coupling of Katritzky alkylpyridinium salts and organoboranes, formed in situ via hydroboration of alkenes, has been developed. This method utilizes the abundance of both alkyl amine precursors and alkenes to form C(sp3)-C(sp3) bonds. This strategy is also effective with alkynes, enabling a C(sp3)-C(sp2) cross-coupling. Under these mild conditions, a broad range of functional groups, including protic groups, is tolerated. As seen with previous alkylpyridinium cross-couplings, mechanistic studies support an alkyl radical intermediate.
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Affiliation(s)
- Kristen M Baker
- Department of Chemistry & Biochemistry , University of Delaware , Newark , Delaware 19716 , United States
| | - Diana Lucas Baca
- Department of Chemistry & Biochemistry , University of Delaware , Newark , Delaware 19716 , United States
| | - Shane Plunkett
- Department of Chemistry & Biochemistry , University of Delaware , Newark , Delaware 19716 , United States
| | - Mitchell E Daneker
- Department of Chemistry & Biochemistry , University of Delaware , Newark , Delaware 19716 , United States
| | - Mary P Watson
- Department of Chemistry & Biochemistry , University of Delaware , Newark , Delaware 19716 , United States
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198
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Huang C, Feng J, Ma R, Fang S, Lu T, Tang W, Du D, Gao J. Redox-Neutral Borylation of Aryl Sulfonium Salts via C-S Activation Enabled by Light. Org Lett 2019; 21:9688-9692. [PMID: 31755274 DOI: 10.1021/acs.orglett.9b03850] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Reported here is a novel photoinduced strategy for the borylation of aryl sulfonium salts using bis(pinacolato)diboron as the boron source. This method exploits redox-neutral aryl sulfoniums to gain access to aryl radicals via C-S bond activation upon photoexcitation under transition-metal-free conditions. Therefore, it grants access to diverse arylboronate esters with good performance from easily available aryl sulfoniums accompanied by mild conditions, operational simplicity, and easy scalability.
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Affiliation(s)
- Chen Huang
- Department of Chemistry , China Pharmaceutical University , 24 Tong Jia Xiang , Nanjing , 210009 , P. R. China
| | - Jie Feng
- Department of Chemistry , China Pharmaceutical University , 24 Tong Jia Xiang , Nanjing , 210009 , P. R. China
| | - Rui Ma
- Department of Chemistry , China Pharmaceutical University , 24 Tong Jia Xiang , Nanjing , 210009 , P. R. China
| | - Shuaishuai Fang
- Department of Chemistry , China Pharmaceutical University , 24 Tong Jia Xiang , Nanjing , 210009 , P. R. China
| | - Tao Lu
- Department of Chemistry , China Pharmaceutical University , 24 Tong Jia Xiang , Nanjing , 210009 , P. R. China
| | - Weifang Tang
- Department of Chemistry , China Pharmaceutical University , 24 Tong Jia Xiang , Nanjing , 210009 , P. R. China
| | - Ding Du
- Department of Chemistry , China Pharmaceutical University , 24 Tong Jia Xiang , Nanjing , 210009 , P. R. China
| | - Jian Gao
- Department of Chemistry , China Pharmaceutical University , 24 Tong Jia Xiang , Nanjing , 210009 , P. R. China
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199
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Huang Q, Michalland J, Zard SZ. Alternating Radical Stabilities: A Convergent Route to Terminal and Internal Boronates. Angew Chem Int Ed Engl 2019; 58:16936-16942. [DOI: 10.1002/anie.201906497] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Indexed: 12/15/2022]
Affiliation(s)
- Qi Huang
- Laboratoire de Synthèse Organique, CNRS UMR 7652Ecole polytechnique Route de Saclay 91128 Palaiseau Cedex France
| | - Jean Michalland
- Laboratoire de Synthèse Organique, CNRS UMR 7652Ecole polytechnique Route de Saclay 91128 Palaiseau Cedex France
| | - Samir Z. Zard
- Laboratoire de Synthèse Organique, CNRS UMR 7652Ecole polytechnique Route de Saclay 91128 Palaiseau Cedex France
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200
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Huang Q, Michalland J, Zard SZ. Alternating Radical Stabilities: A Convergent Route to Terminal and Internal Boronates. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201906497] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Qi Huang
- Laboratoire de Synthèse Organique, CNRS UMR 7652Ecole polytechnique Route de Saclay 91128 Palaiseau Cedex France
| | - Jean Michalland
- Laboratoire de Synthèse Organique, CNRS UMR 7652Ecole polytechnique Route de Saclay 91128 Palaiseau Cedex France
| | - Samir Z. Zard
- Laboratoire de Synthèse Organique, CNRS UMR 7652Ecole polytechnique Route de Saclay 91128 Palaiseau Cedex France
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