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Mosquera J, Bismuto A. Highlights from the 57th Bürgenstock Conference on Stereochemistry 2024. Chem Sci 2024; 15:9392-9396. [PMID: 38939160 PMCID: PMC11205270 DOI: 10.1039/d4sc90102a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/29/2024] Open
Abstract
Herein, we share an overview of the scientific highlights from speakers at the latest edition of the longstanding Bürgenstock Conference.
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Affiliation(s)
- Jesús Mosquera
- Universidade da Coruña, CICA - Centro Interdisciplinar de Química e Bioloxía Rúa as Carballeiras 15071 A Coruña Spain
| | - Alessandro Bismuto
- Institute of Inorganic Chemistry, University of Bonn Gerhard-Domagk-Str. 1 53121 Bonn Germany
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2
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Hanania N, Eghbarieh N, Masarwa A. PolyBorylated Alkenes as Energy-Transfer Reactive Groups: Access to Multi-Borylated Cyclobutanes Combined with Hydrogen Atom Transfer Event. Angew Chem Int Ed Engl 2024; 63:e202405898. [PMID: 38603554 DOI: 10.1002/anie.202405898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2024] [Revised: 04/11/2024] [Accepted: 04/11/2024] [Indexed: 04/13/2024]
Abstract
While polyborylated alkenes are being recognized for their elevated status as highly valuable reagents in modern organic synthesis, allowing efficient access to a diverse array of transformations, including the formation of C-C and C-heteroatom bonds, their potential as energy-transfer reactive groups has remained unexplored. Yet, this potential holds the key to generating elusive polyborylated biradical species, which can be captured by olefins, thereby leading to the construction of new highly-borylated scaffolds. Herein, we report a designed energy-transfer strategy for photosensitized [2+2]-cycloadditions of poly-borylated alkenes with various olefins enabling the regioselective synthesis of diverse poly-borylated cyclobutane motifs, including the 1,1-di-, 1,1,2-tri-, and 1,1,2,2-tetra-borylated cyclobutanes. In fact, these compounds belong to a family that presently lacks efficient synthetic pathways. Interestingly, when α-methylstyrene was used, the reaction involves an interesting 1,5-hydrogen atom transfer (HAT). Mechanistic deuterium-labeling studies have provided insight into the outcome of 1,5-hydrogen atom transfer process. In addition, the polyborylated cyclobutanes are then demonstrated to be useful in selective oxidation processes resulting in the formation of cyclobutanones and γ-lactones.
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Affiliation(s)
- Nicole Hanania
- Institute of Chemistry, The Center for Nanoscience and Nanotechnology, and Casali Center for Applied Chemistry, The Hebrew University of Jerusalem, Jerusalem, 9190401, Israel
| | - Nadim Eghbarieh
- Institute of Chemistry, The Center for Nanoscience and Nanotechnology, and Casali Center for Applied Chemistry, The Hebrew University of Jerusalem, Jerusalem, 9190401, Israel
| | - Ahmad Masarwa
- Institute of Chemistry, The Center for Nanoscience and Nanotechnology, and Casali Center for Applied Chemistry, The Hebrew University of Jerusalem, Jerusalem, 9190401, Israel
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3
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Yuan F, Qi X, Zhao Y, Jia J, Yan X, Hu F, Xia Y. Diversified Synthesis of Chiral Fluorinated Cyclobutane Derivatives Enabled by Regio- and Enantioselective Hydroboration. Angew Chem Int Ed Engl 2024; 63:e202401451. [PMID: 38563752 DOI: 10.1002/anie.202401451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2024] [Revised: 03/29/2024] [Accepted: 04/02/2024] [Indexed: 04/04/2024]
Abstract
The diversified synthesis of chiral fluorinated cyclobutane derivatives has remained a difficult task in synthetic chemistry. Herein, we present an approach for asymmetric hydroboration and formal hydrodefluorination of gem-difluorinated cyclobutenes through rhodium catalysis, providing chiral gem-difluorinated α-boryl cyclobutanes and monofluorinated cyclobutenes with excellent regio- and enantioselectivity, respectively. The key to the success of the two transformations relies on an efficient, mild and highly selective rhodium-catalyzed asymmetric hydroboration with HBPin (pinacolborane), in which the subsequent addition of a base, and a catalytic amount of palladium in some cases, results in the formation of formal hydrodefluorination products with the four-membered ring retained. The obtained chiral gem-difluorinated α-boryl cyclobutanes are versatile building blocks that provide a platform for the synthesis of enantioenriched fluorinated cyclobutane derivatives to a great diversity.
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Affiliation(s)
- Fushan Yuan
- West China School of Public Health and West China Fourth Hospital, and State Key Laboratory of Biotherapy, Sichuan University, 610041, Chengdu, China
| | - Xingyu Qi
- West China School of Public Health and West China Fourth Hospital, and State Key Laboratory of Biotherapy, Sichuan University, 610041, Chengdu, China
| | - Yuanyue Zhao
- West China School of Public Health and West China Fourth Hospital, and State Key Laboratory of Biotherapy, Sichuan University, 610041, Chengdu, China
| | - Jie Jia
- West China School of Public Health and West China Fourth Hospital, and State Key Laboratory of Biotherapy, Sichuan University, 610041, Chengdu, China
| | - Xufei Yan
- West China School of Public Health and West China Fourth Hospital, and State Key Laboratory of Biotherapy, Sichuan University, 610041, Chengdu, China
| | - Fangdong Hu
- School of Chemistry and Chemical Engineering, Linyi University, 276000, Linyi, China
| | - Ying Xia
- West China School of Public Health and West China Fourth Hospital, and State Key Laboratory of Biotherapy, Sichuan University, 610041, Chengdu, China
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4
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Zhou J, Meng L, Yang Z, Wang JJ. Enantio- and Regioselective Cascade Hydroboration of Methylenecyclopropanes for Facile Access to Chiral 1,3- and 1,4-Bis(boronates). ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2400096. [PMID: 38477439 DOI: 10.1002/advs.202400096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Revised: 02/06/2024] [Indexed: 03/14/2024]
Abstract
Chiral 1, n-bis(boronate) plays a crucial role in organic synthesis and medicinal chemistry. However, their catalytic and asymmetric synthesis has long posed a challenge in terms of operability and accessibility from readily available substrates. The recent discovery of the C═C bond formation through β-C elimination of methylenecyclopropanes (MCP) has provided an exciting opportunity to enhance molecular complexity. In this study, the catalyzed asymmetric cascade hydroboration of MCP is developed. By employing different ligands, various homoallylic boronate intermediate are obtained through the hydroboration ring opening process. Subsequently, the cascade hydroboration with HBpin or B2pin2 resulted in the synthesis of enantioenriched chiral 1,3- and 1,4-bis(boronates) in high yields, accompanied by excellent chemo- and enantioselectivities. The selective transformation of these two distinct C─B bonds also demonstrated their application potential in organic synthesis.
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Affiliation(s)
- Jian Zhou
- Department of Chemistry, Hong Kong Baptist University, Kowloon, Hong Kong, China
| | - Ling Meng
- Department of Chemistry, Hong Kong Baptist University, Kowloon, Hong Kong, China
| | - Ziyi Yang
- Department of Chemistry, Hong Kong Baptist University, Kowloon, Hong Kong, China
| | - Jun Joelle Wang
- Department of Chemistry, Hong Kong Baptist University, Kowloon, Hong Kong, China
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5
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Wang S, Zhong C, Huang Y, Lu P. Enantioselective Hydrofunctionalization of Cyclobutenones: Total Synthesis of gem-Dimethylcyclobutane Natural Products. Angew Chem Int Ed Engl 2024; 63:e202400515. [PMID: 38494466 DOI: 10.1002/anie.202400515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 03/08/2024] [Accepted: 03/15/2024] [Indexed: 03/19/2024]
Abstract
Cyclobutanes with a gem-dimethyl group are common motifs in natural products. However, strategies for constructing enantioenriched gem-dimethyl cyclobutanes are still underdeveloped. Herein, we report an enantioselective approach to synthesize a broad group of chiral 2,3-disubstituted cyclobutanones through sequential 1,4-conjugate addition/trapping/cross-coupling of readily available cyclobutenones. The intermediate 2-bromocyclobutanone provides a valuable synthetic handle for further coupling transformations. In addition, this strategy was successfully utilized to synthesize gem-dimethyl cyclobutane-containing natural products, including (+)-β-caryophyllene, (-)-raikovenal, (-)-1β,9αH-5-linoleoyloxy-4,5-secocaryophyllen-4-one, and (-)-rumphellanones A-C.
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Affiliation(s)
- Shaowei Wang
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai, 200433, P. R. China
| | - Changxu Zhong
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai, 200433, P. R. China
| | - Yingchao Huang
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai, 200433, P. R. China
| | - Ping Lu
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai, 200433, P. R. China
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6
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Wang Z, Zhu J, Wang M, Lu P. Palladium-Catalyzed Divergent Enantioselective Functionalization of Cyclobutenes. J Am Chem Soc 2024; 146:12691-12701. [PMID: 38676653 DOI: 10.1021/jacs.4c02215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/29/2024]
Abstract
Aliphatic strained rings have been increasingly applied in medicinal chemistry due to their beneficial physicochemical and pharmacokinetic properties. However, the divergent synthesis of enantioenriched cyclobutane derivatives with various structural patterns continues to be a significant challenge. Here, we disclose a palladium-catalyzed enantioselective desymmetrization of cyclobutenes, resulting in a series of hydroarylation and 1,2- and 1,3-diarylation products via the interceptions of a common Heck intermediate. Mechanistic investigations provide valuable insights into understanding the catalytic mode of the palladium catalysts and the observed variations in the deuterium-responsive behavior during reactions. Furthermore, the synthetic utility is demonstrated in the syntheses of deuterated drug candidate belaperidone skeletons and pseudosymmetrical truxinic acid-type derivatives.
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Affiliation(s)
- Zhonggui Wang
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai 200433, China
| | - Jie Zhu
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - 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
| | - Ping Lu
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai 200433, China
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7
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Zhou C, Liang Y, Li Y, Huang M, Luo Z, Yang KF, Li Z, Lai GQ, Zhang P. Rapid Access to Chiral Spiro[2.3] Lactams: Stereoselective Hydroborylation and Hydrosilylation and Remote Control of Axial Chirality by Copper-Catalyzed Desymmetrization of Spirocyclopropenes. Org Lett 2024; 26:1941-1946. [PMID: 38415590 DOI: 10.1021/acs.orglett.4c00292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
Abstract
Chiral spirocyclopropyl β-lactams are common motifs in bioactive compounds and pharmaceuticals. Here we disclose a diastereoselective and enantioselective hydroborylation and hydrosilylation of spirocyclopropenes, via a Cu-catalyzed desymmetrization strategy, for the rapid preparation of enantio-enriched spirocyclopropyl β-lactams. The efficient desymmetrization strategy allows the remote control of axial chirality, offering the borylated and silylated products bearing central, spiro, and axial chirality. The combination of multichiral elements would provide a novel motif for biological evaluation in potential drug discovery.
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Affiliation(s)
- Changsheng Zhou
- Hangzhou Normal University, College of Material Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou 311121, China
| | - Yixin Liang
- Hangzhou Normal University, College of Material Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou 311121, China
| | - Ying Li
- Hangzhou Normal University, College of Material Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou 311121, China
| | - Ming Huang
- Hangzhou Normal University, College of Material Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou 311121, China
| | - Ziwei Luo
- Hangzhou Normal University, College of Material Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou 311121, China
| | - Ke-Fang Yang
- Hangzhou Normal University, College of Material Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou 311121, China
| | - Ze Li
- Hangzhou Normal University, College of Material Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou 311121, China
| | - Guo-Qiao Lai
- Hangzhou Normal University, College of Material Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou 311121, China
| | - Pinglu Zhang
- Hangzhou Normal University, College of Material Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou 311121, China
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8
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Prysiazhniuk K, Polishchuk O, Shulha S, Gudzikevych K, Datsenko OP, Kubyshkin V, Mykhailiuk PK. Borylated cyclobutanes via thermal [2 + 2]-cycloaddition. Chem Sci 2024; 15:3249-3254. [PMID: 38425521 PMCID: PMC10901489 DOI: 10.1039/d3sc06600b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Accepted: 01/17/2024] [Indexed: 03/02/2024] Open
Abstract
A one-step approach to borylated cyclobutanes from amides of carboxylic acids and vinyl boronates is elaborated. The reaction proceeds via the thermal [2 + 2]-cycloaddition of in situ-generated keteniminium salts.
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Affiliation(s)
- Kateryna Prysiazhniuk
- Enamine Ltd Winston Churchill St. 78 02094 Kyiv Ukraine https://www.mykhailiukchem.org
| | - Oleksandr Polishchuk
- Enamine Ltd Winston Churchill St. 78 02094 Kyiv Ukraine https://www.mykhailiukchem.org
| | - Stanislav Shulha
- Enamine Ltd Winston Churchill St. 78 02094 Kyiv Ukraine https://www.mykhailiukchem.org
| | - Kyrylo Gudzikevych
- Enamine Ltd Winston Churchill St. 78 02094 Kyiv Ukraine https://www.mykhailiukchem.org
| | - Oleksandr P Datsenko
- Enamine Ltd Winston Churchill St. 78 02094 Kyiv Ukraine https://www.mykhailiukchem.org
| | - Vladimir Kubyshkin
- Enamine Ltd Winston Churchill St. 78 02094 Kyiv Ukraine https://www.mykhailiukchem.org
| | - Pavel K Mykhailiuk
- Enamine Ltd Winston Churchill St. 78 02094 Kyiv Ukraine https://www.mykhailiukchem.org
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9
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Zheng W, Tan BB, Ge S, Lu Y. Enantioselective Copper-Catalyzed Ring-Opening Diboration of Arylidenecyclopropanes to Access Chiral Skipped 1,4- and 1,3-Diboronates. J Am Chem Soc 2024; 146:5366-5374. [PMID: 38354313 DOI: 10.1021/jacs.3c12675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2024]
Abstract
Two enantioselective approaches to synthesize chiral skipped diboronate compounds have been developed, relying on copper-catalyzed one-pot asymmetric ring-opening diboration of arylidenecyclopropanes. A wide range of arylidenecyclopropanes react smoothly with HBpin in the presence of CuOAc and (R)-DTBM-Segphos, affording chiral 1,4-diboronates with high enantioselectivity (up to 99% ee). Meanwhile, a variety of arylidenecyclopropanes react selectively with HBpin and B2pin2 in the presence of CuOAc and (S,S)-Ph-BPE with the sequential addition of MeOH, providing chiral 1,3-diboronates with high enantioselectivity (up to 98% ee). These enantioenriched 1,3- and 1,4-diboronates can undergo various enantiospecific transformations with minimal loss of their enantiopurity. Mechanistic studies reveal that these two diboration processes start with CuH-catalyzed ring-opening hydroboration of arylidenecyclopropanes to form a mixture of Z/E-homoallyl boronate intermediates, which subsequently undergo enantioselective CuH-catalyzed second hydroboration or Cu-Bpin-catalyzed protoboration to produce chiral 1,4-diboronates or 1,3-diboronates, respectively.
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Affiliation(s)
- Wenrui Zheng
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Boon Beng Tan
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Shaozhong Ge
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Yixin Lu
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
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10
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Lan S, Huang H, Liu W, Xu C, Lei X, Dong W, Liu J, Yang S, Cotman AE, Zhang Q, Fang X. Asymmetric Transfer Hydrogenation of Cyclobutenediones. J Am Chem Soc 2024; 146:4942-4957. [PMID: 38326715 DOI: 10.1021/jacs.3c14239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2024]
Abstract
Four-membered carbocycles are fundamental substructures in bioactive molecules and approved drugs and serve as irreplaceable building blocks in organic synthesis. However, developing efficient protocols furnishing diversified four-membered ring compounds in a highly regio-, diastereo-, and enantioselective fashion remains challenging but very desirable. Here, we report the unprecedented asymmetric transfer hydrogenation of cyclobutenediones. The reaction can selectively afford three types of four-membered products in high yields with high stereoselectivities, and the highly functionalized products enable a series of further transformations to form more diversified four-membered compounds. Asymmetric synthesis of di-, tri-, and tetrasubstituted bioactive molecules has also been achieved. Systematic mechanistic studies and theoretical calculations have revealed the origin of the regioselectivity, the key hydrogenation transition state models, and the sequence of the double and triple hydrogenation processes. The work provides a new choice for the catalytic asymmetric synthesis of cyclobutanes and related structures and demonstrates the robustness of asymmetric transfer hydrogenation in the accurate selectivity control of highly functionalized substrates.
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Affiliation(s)
- Shouang Lan
- State Key Laboratory of Structural Chemistry, and Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, Fujian College, University of Chinese Academy of Sciences, Fuzhou 350100, China
| | - Huangjiang Huang
- State Key Laboratory of Structural Chemistry, and Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, Fujian College, University of Chinese Academy of Sciences, Fuzhou 350100, China
- Fujian Normal University, Fuzhou 350108, China
| | - Wenjun Liu
- State Key Laboratory of Structural Chemistry, and Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, Fujian College, University of Chinese Academy of Sciences, Fuzhou 350100, China
| | - Chao Xu
- State Key Laboratory of Structural Chemistry, and Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, Fujian College, University of Chinese Academy of Sciences, Fuzhou 350100, China
| | - Xiang Lei
- State Key Laboratory of Structural Chemistry, and Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, Fujian College, University of Chinese Academy of Sciences, Fuzhou 350100, China
| | - Wennan Dong
- State Key Laboratory of Structural Chemistry, and Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, Fujian College, University of Chinese Academy of Sciences, Fuzhou 350100, China
| | - Jinggong Liu
- Orthopedics Department, Guangdong Provincial Hospital of Traditional Chinese Medicine, Guangzhou 510120, China
| | - Shuang Yang
- State Key Laboratory of Structural Chemistry, and Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, Fujian College, University of Chinese Academy of Sciences, Fuzhou 350100, China
| | - Andrej Emanuel Cotman
- Faculty of Pharmacy, University of Ljubljana, Aškerčeva cesta 7, SI-1000 Ljubljana, Slovenia
| | - Qi Zhang
- School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, China
| | - Xinqiang Fang
- State Key Laboratory of Structural Chemistry, and Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, Fujian College, University of Chinese Academy of Sciences, Fuzhou 350100, China
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11
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Liashuk OS, Grygorenko OO, Volovenko YM, Waser J. Photochemical [2+2] Cycloaddition of Alkynyl Boronates. Chemistry 2023; 29:e202301650. [PMID: 37394686 DOI: 10.1002/chem.202301650] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2023] [Revised: 06/30/2023] [Accepted: 06/30/2023] [Indexed: 07/04/2023]
Abstract
A photochemical [2+2] cycloaddition of alkynyl boronates and maleimides is reported. The developed protocol provided 35-70 % yield of maleimide-derived cyclobutenyl boronates and demonstrated wide compatibility with various functional groups. The synthetic utility of the prepared building blocks was demonstrated for a range of transformations, including Suzuki cross-coupling, catalytic or metal-hydride reduction, oxidation, and cycloaddition reactions. With aryl-substituted alkynyl boronates, the products of double [2+2] cycloaddition were obtained predominantly. Using the developed protocol, a cyclobutene-derived analogue of Thalidomide was prepared in one step. Mechanistic studies supported the participation of the triplet-excited state maleimides and ground state alkynyl boronates in the key step of the process.
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Affiliation(s)
- Oleksandr S Liashuk
- Chemical Faculty, Taras Shevchenko National University of Kyїv, Kyiv, Volodymyrska Street 60, 01601, Kyїv, Ukraine
- Laboratory of Catalysis and Organic Synthesis, Institut des Sciences et Ingénierie Chimique, Ecole Polytechnique Fédérale de Lausanne, 1015, Lausanne, Switzerland
- Enamine Ltd., Kyiv, Winston Churchill Street 78, 02094, Kyїv, Ukraine
| | - Oleksandr O Grygorenko
- Chemical Faculty, Taras Shevchenko National University of Kyїv, Kyiv, Volodymyrska Street 60, 01601, Kyїv, Ukraine
- Enamine Ltd., Kyiv, Winston Churchill Street 78, 02094, Kyїv, Ukraine
| | - Yulian M Volovenko
- Chemical Faculty, Taras Shevchenko National University of Kyїv, Kyiv, Volodymyrska Street 60, 01601, Kyїv, Ukraine
| | - Jérôme Waser
- Laboratory of Catalysis and Organic Synthesis, Institut des Sciences et Ingénierie Chimique, Ecole Polytechnique Fédérale de Lausanne, 1015, Lausanne, Switzerland
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12
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Lu L, Lu P. Enantioselective [3+2]-cycloaddition of 2,3-disubstituted cyclobutenones: vicinal quaternary stereocenters construction and skeletal functionalization. Chem Sci 2023; 14:8355-8359. [PMID: 37564417 PMCID: PMC10411620 DOI: 10.1039/d3sc02485g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Accepted: 07/13/2023] [Indexed: 08/12/2023] Open
Abstract
Cycloaddition is a fundamental transformation, featuring the assembly of complex cyclic molecules with multiple stereocenters. We report here a silver-catalyzed [3+2]-cycloaddition of 2,3-disubstituted cyclobutenones with an array of azomethine ylide precursors iminoesters, furnishing azabicycles in good yields and enantioselectivities. Up to three contiguous all-carbon quaternary centers, including two angular stereocenters, could be constructed efficiently, due to high reactivity of strained cyclobutenones. Subsequent skeletal remodeling provided versatile molecules with distinct structural characters.
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Affiliation(s)
- Licheng Lu
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University 220 Handan Lu Shanghai 200433 P. R. China
| | - Ping Lu
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University 220 Handan Lu Shanghai 200433 P. R. China
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13
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Egea‐Arrebola D, Goetzke FW, Fletcher SP. Rhodium-Catalyzed Asymmetric Arylation of Cyclobutenone Ketals. Angew Chem Int Ed Engl 2023; 62:e202217381. [PMID: 36728888 PMCID: PMC10946970 DOI: 10.1002/anie.202217381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Revised: 01/31/2023] [Accepted: 02/02/2023] [Indexed: 02/03/2023]
Abstract
Complex cyclobutanes are important motifs in both bioactive molecules and natural products, yet their enantioselective preparation has not been widely explored. In this work, we describe rhodium-catalyzed enantioselective additions of aryl and vinyl boronic acids to cyclobutenone ketals. This transformation involves enantioselective carbometalation to give cyclobutyl-rhodium intermediates, followed by β-oxygen elimination to afford enantioenriched enol ethers. Overall, this addition serves as a surrogate for Rh-catalyzed 1,4-additions to cyclobutenone.
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Affiliation(s)
- David Egea‐Arrebola
- Department of ChemistryChemistry Research LaboratoryDepartment of ChemistryUniversity of Oxford12 Mansfield RoadOxfordOX1 3TAUK
| | - F. Wieland Goetzke
- Department of ChemistryChemistry Research LaboratoryDepartment of ChemistryUniversity of Oxford12 Mansfield RoadOxfordOX1 3TAUK
| | - Stephen P. Fletcher
- Department of ChemistryChemistry Research LaboratoryDepartment of ChemistryUniversity of Oxford12 Mansfield RoadOxfordOX1 3TAUK
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14
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Liang Z, Wang L, Wang Y, Wang L, Chong Q, Meng F. Cobalt-Catalyzed Diastereo- and Enantioselective Carbon-Carbon Bond Forming Reactions of Cyclobutenes. J Am Chem Soc 2023; 145:3588-3598. [PMID: 36734874 DOI: 10.1021/jacs.2c12475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Catalytic enantioselective functionalization of cyclobutenes constitutes a general and modular strategy for construction of enantioenriched complex cyclobutanes bearing multiple stereogenic centers, as chiral four-membered rings are common motifs in biologically active molecules and versatile intermediates in organic synthesis. However, enantioselective synthesis of cyclobutanes through such a strategy remained significantly limited. Herein, we report a series of unprecedented cobalt-catalyzed carbon-carbon bond forming reactions of cyclobutenes that are initiated through enantioselective carbometalation. The protocols feature diastereo- and enantioselective introduction of allyl, alkynyl, and functionalized alkyl groups. Mechanistic studies indicated an unusual 1,3-cobalt migration and subsequent β-carbon elimination cascade process occurred in the allyl addition. These new discoveries established a new elementary process for cobalt catalysis and an extension of diversity of nucleophiles for enantioselective transformations of cyclobutenes.
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Affiliation(s)
- Zhikun Liang
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, China, 200032
| | - Lei Wang
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, China, 200032
| | - Yu Wang
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, China, 200032
| | - Lifan Wang
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, China, 200032
| | - Qinglei Chong
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, China, 200032
| | - Fanke Meng
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, China, 200032.,School of Chemistry and Material Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, China, 310024
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15
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Teresa J, Velado M, Fernández de la Pradilla R, Viso A, Lozano B, Tortosa M. Enantioselective Suzuki cross-coupling of 1,2-diboryl cyclopropanes. Chem Sci 2023; 14:1575-1581. [PMID: 36794195 PMCID: PMC9906671 DOI: 10.1039/d2sc05789a] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Accepted: 01/12/2023] [Indexed: 01/15/2023] Open
Abstract
Herein, we describe the catalytic enantioselective cross-coupling of 1,2-bisboronic esters. Prior work on group specific cross coupling is limited to the use of geminal bis-boronates. This desymmetrization provides a novel approach to prepare enantioenriched cyclopropyl boronates with three contiguous stereocenters, that could be further derivatized through selective functionalization of the carbon-boron bond. Our results suggest that transmetallation, which is the enantiodetermining step, takes place with retention of stereochemistry at carbon.
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Affiliation(s)
- Javier Teresa
- Organic Chemistry Department, Center for Innovation in Advanced Chemistry (ORFEO-CINQA), Universidad Autónoma de Madrid (UAM) 28049 Madrid Spain
| | - Marina Velado
- Instituto de Química Orgánica General (IQOG), CSIC Juan de la Cierva 3 28006 Madrid Spain
| | | | - Alma Viso
- Instituto de Química Orgánica General (IQOG), CSIC Juan de la Cierva 3 28006 Madrid Spain
| | - Blanca Lozano
- Organic Chemistry Department, Center for Innovation in Advanced Chemistry (ORFEO-CINQA), Universidad Autónoma de Madrid (UAM) 28049 Madrid Spain
| | - Mariola Tortosa
- Organic Chemistry Department, Center for Innovation in Advanced Chemistry (ORFEO-CINQA), Universidad Autónoma de Madrid (UAM) 28049 Madrid Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid (UAM) 28049 Madrid Spain
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16
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Yan M, Zhou Q, Lu P. Collective Synthesis of Chiral Tetrasubstituted Cyclobutanes Enabled by Enantioconvergent Negishi Cross-Coupling of Cyclobutenones. Angew Chem Int Ed Engl 2023; 62:e202218008. [PMID: 36539352 DOI: 10.1002/anie.202218008] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 12/20/2022] [Accepted: 12/20/2022] [Indexed: 12/24/2022]
Abstract
Cyclobutenones provide a straightforward four-carbon ring platform for further structural elaborations in that every carbon atom of the ring could be potentially functionalized. We report here a nickel catalyzed enantioconvergent Negishi coupling of 4-iodocyclobutenones with an array of aryl or alkenyl zinc reagents to access enantioenriched 4-substituted cyclobutenones, from which a modular approach to the synthesis of 1,2,3,4-tetrasubstituted cyclobutanes was demonstrated.
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Affiliation(s)
- Min Yan
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, 200433, Shanghai, P. R. China
| | - Qiang Zhou
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, 200433, Shanghai, P. R. China
| | - Ping Lu
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, 200433, Shanghai, P. R. China
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17
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McDonald TR, Rousseaux SAL. Synthesis of 3-borylated cyclobutanols from epihalohydrins or epoxy alcohol derivatives. Chem Sci 2023; 14:963-969. [PMID: 36755731 PMCID: PMC9890513 DOI: 10.1039/d2sc06088d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Accepted: 12/20/2022] [Indexed: 12/24/2022] Open
Abstract
There is an increasing interest in cyclobutanes within the medicinal chemistry community. Therefore, methods to prepare cyclobutanes that contain synthetic handles for further elaboration are of interest. Herein, we report a new approach for the synthesis of 3-borylated cyclobutanols via a formal [3 + 1]-cycloaddition using readily accessible 1,1-diborylalkanes and epihalohydrins or epoxy alcohol derivatives. 1-Substituted epibromohydrin starting materials provide access to borylated cyclobutanols containing substituents at three of the four positions on the cyclobutane core, and enantioenriched epibromohydrins lead to enantioenriched cyclobutanols with high levels of enantiospecificity (>98%). Finally, derivatization studies demonstrate the synthetic utility of both the OH and Bpin handles.
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Affiliation(s)
- Tyler R. McDonald
- Department of Chemistry, University of Toronto. 80 St. George StreetTorontoONCanada
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18
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Yan P, Zhang J, Lu L, Fang H, Lu P. Enantioselective Construction of Vicinal Angular Quaternary Stereocenters Enabled by Strained Cyclobutenones. ACS Catal 2022. [DOI: 10.1021/acscatal.2c05265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Affiliation(s)
- Peng Yan
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai, 200433, People’s Republic of China
| | - Jia Zhang
- School of Materials Science and Engineering, Tianjin Key Lab for Rare Earth Materials and Applications, Nankai University, Tianjin, 300350, People’s Republic of China
| | - Licheng Lu
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai, 200433, People’s Republic of China
| | - Huayi Fang
- School of Materials Science and Engineering, Tianjin Key Lab for Rare Earth Materials and Applications, Nankai University, Tianjin, 300350, People’s Republic of China
| | - Ping Lu
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai, 200433, People’s Republic of China
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19
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Trammel GL, Kannangara PB, Vasko D, Datsenko O, Mykhailiuk P, Brown MK. Arylboration of Enecarbamates for the Synthesis of Borylated Saturated N-Heterocycles. Angew Chem Int Ed Engl 2022; 61:e202212117. [PMID: 36250954 PMCID: PMC9643676 DOI: 10.1002/anie.202212117] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Indexed: 11/09/2022]
Abstract
Two catalytic systems have been developed for the arylboration of endocyclic enecarbamates to deliver synthetically versatile borylated saturated N-heterocycles in good regio- and diastereoselectivities. A Cu/Pd dual catalytic reaction enables the synthesis of borylated, α-arylated azetidines, while a Ni-catalysed arylboration reaction efficiently functionalizes 5-, 6-, and 7-membered enecarbamates. In the case of the Cu/Pd-system, a remarkable additive effect was identified that allowed for broader scope. The products are synthetically useful, as demonstrated by manipulations of the boronic ester to access biologically active compounds.
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Affiliation(s)
- Grace L. Trammel
- Department of ChemistryIndiana University800 E. Kirkwood Ave.BloomingtonIN, 47401USA
| | | | | | | | - Pavel Mykhailiuk
- Enamine Ltd.Chervonotkatska 6002094KyivUkraine,Taras Shevchenko National University of KyivChemistry DepartmentVolodymyrska 6401601KyivUkraine
| | - M. Kevin Brown
- Department of ChemistryIndiana University800 E. Kirkwood Ave.BloomingtonIN, 47401USA
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20
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Cui M, Zhao ZY, Oestreich M. Boosting the Enantioselectivity of Conjugate Borylation of α,β-Disubstituted Cyclobutenones with Monooxides of Chiral C 2 -Symmetric Bis(phosphine) Ligands. Chemistry 2022; 28:e202202163. [PMID: 35816363 DOI: 10.1002/chem.202202163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Indexed: 01/07/2023]
Abstract
Chiral bis(phosphine) monooxides (BPMOs) derived from C2 -symmetric bis(phosphines) have been found to induce superior levels of enantioselection in copper-catalyzed conjugate borylation of α,β-disubstituted cyclobutenones. More precisely, enantiomeric excesses as well as chemical yields are exceedingly high with (R,R)-Bozphos as the chiral ligand while these values are low with parent (R,R)-Me-Duphos. A similar yet less pronounced effect was seen in the corresponding 1,6-addition to para-quinone methides.
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Affiliation(s)
- Ming Cui
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 115, 10623, Berlin, Germany
| | - Zhi-Yuan Zhao
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 115, 10623, Berlin, Germany
| | - Martin Oestreich
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 115, 10623, Berlin, Germany
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21
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Liu Y, Ni D, Brown MK. Boronic Ester Enabled [2 + 2]-Cycloadditions by Temporary Coordination: Synthesis of Artochamin J and Piperarborenine B. J Am Chem Soc 2022; 144:18790-18796. [PMID: 36200833 PMCID: PMC9832331 DOI: 10.1021/jacs.2c08777] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
A strategy for the photosensitized cycloaddition of alkenylboronates and allylic alcohols by a temporary coordination is presented. The process allows for the synthesis of a diverse range of cyclobutylboronates. Key to development of these reactions is the temporary coordination of the allylic alcohol to the Bpin unit. This not only allows for the reaction to proceed in an intramolecular manner but also allows for high levels of stereo and regiocontrol. A key aspect of these studies is the utility of the cycloadducts in the synthesis of complex natural products artochamin J and piperarborenine B.
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Affiliation(s)
- Yanyao Liu
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Dongshun Ni
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - M Kevin Brown
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, United States
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22
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Trammel GL, Kannangara PB, Vasko D, Datsenko O, Mykhailiuk P, Brown MK. Arylboration of Enecarbamates for the Synthesis of Borylated Saturated N‐Heterocycles. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202212117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Grace L. Trammel
- Department of Chemistry Indiana University 800 E. Kirkwood Ave. Bloomington IN, 47401 USA
| | | | - Dmytro Vasko
- Enamine Ltd. Chervonotkatska 60 02094 Kyiv Ukraine
| | | | - Pavel Mykhailiuk
- Enamine Ltd. Chervonotkatska 60 02094 Kyiv Ukraine
- Taras Shevchenko National University of Kyiv Chemistry Department Volodymyrska 64 01601 Kyiv Ukraine
| | - M. Kevin Brown
- Department of Chemistry Indiana University 800 E. Kirkwood Ave. Bloomington IN, 47401 USA
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23
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Zhang M, Xu P, Vendola AJ, Allais C, Dechert Schmitt AM, Singer RA, Morken JP. Stereocontrolled Pericyclic and Radical Cycloaddition Reactions of Readily Accessible Chiral Alkenyl Diazaborolidines. Angew Chem Int Ed Engl 2022; 61:e202205454. [PMID: 35587213 PMCID: PMC9296615 DOI: 10.1002/anie.202205454] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Indexed: 07/27/2023]
Abstract
In this paper is described an easily synthesized chiral diazaborolidine that is inexpensive, stable, and provides excellent stereoselection across a number of reaction classes. These versatile compounds possess utility in four different classes of cycloaddition reactions, offering good yield and stereoselectivity. X-ray structure analysis provides insight about the origin of stereocontrol.
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Affiliation(s)
- Mingkai Zhang
- Department of Chemistry, Boston College, 2609 Beacon Street, Chestnut Hill, MA 02467, USA
| | - Peilin Xu
- Department of Chemistry, Boston College, 2609 Beacon Street, Chestnut Hill, MA 02467, USA
| | - Alex J Vendola
- Department of Chemistry, Boston College, 2609 Beacon Street, Chestnut Hill, MA 02467, USA
| | - Christophe Allais
- Pfizer Worldwide Research and Development, Eastern Point Road, Groton, CT 06430, USA
| | | | - Robert A Singer
- Pfizer Worldwide Research and Development, Eastern Point Road, Groton, CT 06430, USA
| | - James P Morken
- Department of Chemistry, Boston College, 2609 Beacon Street, Chestnut Hill, MA 02467, USA
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24
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Dong W, Ye Z, Zhao W. Enantioselective Cobalt-Catalyzed Hydroboration of Ketone-Derived Silyl Enol Ethers. Angew Chem Int Ed Engl 2022; 61:e202117413. [PMID: 35488385 DOI: 10.1002/anie.202117413] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Indexed: 12/23/2022]
Abstract
Catalytic asymmetric hydroboration of alkenes is a powerful tool for the synthesis of natural products, agrochemicals, and pharmaceuticals via the versatile transformations of chiral alkyl boronic esters. However, the scope of available alkenes is limited to styrenes, activated alkenes, and compounds with directing groups. The catalytic enantioselective hydroboration of heteroatom-substituted alkenes is rarely explored and those catalyzed by earth-abundant metals are yet to be reported. Herein, we report a cobalt-catalyzed asymmetric hydroboration of ketone-derived silyl enol ethers and provide a convenient approach to access valuable enantiopure β-hydroxy boronic esters. This protocol features mild reaction conditions, a broad substrate scope, and excellent enantioselectivities (up to 99 % ee). This approach was applied in the successful synthesis of salmeterol and albuterol, demonstrating its potential to streamline complex molecule synthesis.
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Affiliation(s)
- Wenke Dong
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, P. R. China
| | - Zhiyang Ye
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, P. R. China
| | - Wanxiang Zhao
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, P. R. China
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25
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Liu Y, Ni D, Stevenson BG, Tripathy V, Braley SE, Raghavachari K, Swierk JR, Brown MK. Photosensitized [2+2]-Cycloadditions of Alkenylboronates and Alkenes. Angew Chem Int Ed Engl 2022; 61:e202200725. [PMID: 35446458 DOI: 10.1002/anie.202200725] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Indexed: 12/17/2022]
Abstract
A new strategy for the synthesis of highly versatile cyclobutylboronates via the photosensitized [2+2]-cycloaddition of alkenylboronates and alkenes is presented. The process is mechanistically different from other processes in that energy transfer occurs with the alkenylboronate as opposed to the other alkene. This strategy allows for the synthesis of an array of diverse cyclobutylboronates. The conversion of these adducts to other compounds as well as their utility in the synthesis of melicodenine C is demonstrated.
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Affiliation(s)
- Yanyao Liu
- Department of Chemistry, Indiana University, 800 E. Kirkwood Ave., Bloomington, IN 47401, USA
| | - Dongshun Ni
- Department of Chemistry, Indiana University, 800 E. Kirkwood Ave., Bloomington, IN 47401, USA
| | - Bernard G Stevenson
- Department of Chemistry, Binghamton University, 4400 Vestal Parkway East, Binghamton, NY 13902, USA
| | - Vikrant Tripathy
- Department of Chemistry, Indiana University, 800 E. Kirkwood Ave., Bloomington, IN 47401, USA
| | - Sarah E Braley
- Department of Chemistry, Indiana University, 800 E. Kirkwood Ave., Bloomington, IN 47401, USA
| | - Krishnan Raghavachari
- Department of Chemistry, Indiana University, 800 E. Kirkwood Ave., Bloomington, IN 47401, USA
| | - John R Swierk
- Department of Chemistry, Binghamton University, 4400 Vestal Parkway East, Binghamton, NY 13902, USA
| | - M Kevin Brown
- Department of Chemistry, Indiana University, 800 E. Kirkwood Ave., Bloomington, IN 47401, USA
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26
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Zhang M, Xu P, Vendola AJ, Allais C, Dechert Schmitt A, Singer RA, Morken JP. Stereocontrolled Pericyclic and Radical Cycloaddition Reactions of Readily Accessible Chiral Alkenyl Diazaborolidines. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202205454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Mingkai Zhang
- Department of Chemistry Boston College 2609 Beacon Street Chestnut Hill MA 02467 USA
| | - Peilin Xu
- Department of Chemistry Boston College 2609 Beacon Street Chestnut Hill MA 02467 USA
| | - Alex J. Vendola
- Department of Chemistry Boston College 2609 Beacon Street Chestnut Hill MA 02467 USA
| | - Christophe Allais
- Pfizer Worldwide Research and Development Eastern Point Road Groton CT 06430 USA
| | | | - Robert A. Singer
- Pfizer Worldwide Research and Development Eastern Point Road Groton CT 06430 USA
| | - James P. Morken
- Department of Chemistry Boston College 2609 Beacon Street Chestnut Hill MA 02467 USA
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27
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Zhang Q, Wang S, Yin J, Xiong T, Zhang Q. Remote Site-Selective Asymmetric Protoboration of Unactivated Alkenes Enabled by Bimetallic Relay Catalysis. Angew Chem Int Ed Engl 2022; 61:e202202713. [PMID: 35297558 DOI: 10.1002/anie.202202713] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Indexed: 12/14/2022]
Abstract
A remote C(sp3 )-H bond asymmetric borylation of unactivated alkenes was achieved by bimetallic relay catalysis. The reaction proceeded through reversible and consecutive β-H elimination/olefin insertion promoted by CoH species generated in situ, followed by copper-catalyzed asymmetric protoboration. The use of this synergistic Co/Cu catalysis protocol allowed the enantioselective protoboration of various unactivated terminal alkenes and internal alkenes, as well as an unrefined mixture of olefin isomers, at the distal less-reactive β-position to a functional group, leading to chiral organoboronates.
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Affiliation(s)
- Qiao Zhang
- Department of Chemistry, Northeast Normal University, Changchun, 130024, China
| | - Simin Wang
- Department of Chemistry, Northeast Normal University, Changchun, 130024, China
| | - Jianjun Yin
- Department of Chemistry, Northeast Normal University, Changchun, 130024, China
| | - Tao Xiong
- Department of Chemistry, Northeast Normal University, Changchun, 130024, China
| | - Qian Zhang
- Department of Chemistry, Northeast Normal University, Changchun, 130024, China.,State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, 345 Lingling Lu, Shanghai, 200032, China
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28
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Yang Q, Wang Z, Hor CHH, Xiao H, Bian Z, Wang J(J. Asymmetric synthesis of flavanols via Cu-catalyzed kinetic resolution of chromenes and their anti-inflammatory activity. SCIENCE ADVANCES 2022; 8:eabm9603. [PMID: 35658029 PMCID: PMC9166297 DOI: 10.1126/sciadv.abm9603] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Flavanols are privileged heterocyclic compounds in medicinal chemistry. It is notable to develop an efficient and straightforward protocol for accessing chiral flavanols with precise control of the stereocenters. Here, a highly efficient kinetic resolution of chromenes was reported via Cu-catalyzed asymmetric hydroboration. This previously unidentified approach features a one-step synthesis of chiral flavan-3-ols containing two vicinal stereogenic centers via a highly efficient kinetic resolution (s factor up to 1060, >99% ee for most products). In addition, the anti-inflammation effects of these diversified flavan-3-ols were studied by the in vitro experiments and RNA sequencing analysis. These flavan-3-ols showed inhibitory effects on the secretion of pro-inflammation cytokines including interleukin-1β (IL-1β), IL-6, and tumor necrosis factor-α (TNF-α), as well as inhibiting the inflammation responses through down-regulating the gene transcriptions closely related to PI3K-Akt signaling pathway and TNF signaling pathway. The results suggested that these newly synthesized flavan-3-ols have the potential to be lead compounds for anti-inflammatory drugs.
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Affiliation(s)
- Qingjing Yang
- Department of Chemistry, Hong Kong Baptist University, Hong Kong
- Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
| | - Zihao Wang
- Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
- School of Chinese Medicine, Hong Kong Baptist University, Hong Kong
| | | | - Haitao Xiao
- School of Pharmaceutical Sciences, Health Science Center, Shenzhen University, Shenzhen 518066, China
| | - Zhaoxiang Bian
- School of Chinese Medicine, Hong Kong Baptist University, Hong Kong
- Corresponding author. (J.W.); (Z.B.)
| | - Jun (Joelle) Wang
- Department of Chemistry, Hong Kong Baptist University, Hong Kong
- Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
- Corresponding author. (J.W.); (Z.B.)
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29
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Dong W, Ye Z, Zhao W. Enantioselective Cobalt‐Catalyzed Hydroboration of Ketone‐Derived Silyl Enol Ethers. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202117413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Wenke Dong
- Hunan University College of Chemistry and Chemical Engineering CHINA
| | - Zhiyang Ye
- Hunan University College of Chemistry and Chemical Engineering CHINA
| | - Wanxiang Zhao
- Hunan University chemistry Yuelushan, Changsha 410082 changsha CHINA
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30
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Liu Y, Ni D, Stevenson BG, Tripathy V, Braley SE, Raghavachari K, Swierk JR, Brown MK. Photosensitized [2+2]‐Cycloadditions of Alkenylboronates and Alkenes. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202200725] [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)
- Yanyao Liu
- Department of Chemistry Indiana University 800 E. Kirkwood Ave. Bloomington IN 47401 USA
| | - Dongshun Ni
- Department of Chemistry Indiana University 800 E. Kirkwood Ave. Bloomington IN 47401 USA
| | - Bernard G. Stevenson
- Department of Chemistry Binghamton University 4400 Vestal Parkway East Binghamton NY 13902 USA
| | - Vikrant Tripathy
- Department of Chemistry Indiana University 800 E. Kirkwood Ave. Bloomington IN 47401 USA
| | - Sarah E. Braley
- Department of Chemistry Indiana University 800 E. Kirkwood Ave. Bloomington IN 47401 USA
| | - Krishnan Raghavachari
- Department of Chemistry Indiana University 800 E. Kirkwood Ave. Bloomington IN 47401 USA
| | - John R. Swierk
- Department of Chemistry Binghamton University 4400 Vestal Parkway East Binghamton NY 13902 USA
| | - M. Kevin Brown
- Department of Chemistry Indiana University 800 E. Kirkwood Ave. Bloomington IN 47401 USA
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31
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Abstract
The ring-opening carbonyl-olefin metathesis of cyclobutenes to furnish γ,δ-unsaturated aldehydes-formal Claisen rearrangement products-is reported. The bistrifluoroacetic acid salt of 2,3-diazabicyclo[2.2.2]octane promotes these reactions efficiently with a variety of cyclobutenes and aldehydes, including aliphatic, α,β-unsaturated, aryl, and heteroaryl aldehydes. Catalytic reactions are also demonstrated.
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Affiliation(s)
- Maxwell G. Holl
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Tristan H. Lambert
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
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32
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Zhang Q, Wang S, Yin J, Xiong T, Zhang Q. Remote Site‐Selective Asymmetric Protoboration of Unactivated Alkenes Enabled by Bimetallic Relay Catalysis. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202202713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Qiao Zhang
- Northeast Normal University Department of Chemistry CHINA
| | - Simin Wang
- Northeast Normal University Department of Chemistry CHINA
| | - Jianjun Yin
- Northeast Normal University Department of Chemistry CHINA
| | - Tao Xiong
- Northeast Normal University Department of Chemistry Renmin ST. 5268 130024 ChangChun CHINA
| | - Qian Zhang
- Northeast Normal University Department of Chemistry CHINA
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33
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Michalland J, Casaretto N, Zard SZ. A Modular Access to 1,2‐ and 1,3‐Disubstituted Cyclobutylboronic Esters by Consecutive Radical Additions. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202113333] [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)
- Jean Michalland
- Laboratoire de Synthèse Organique CNRS UMR 7652 Ecole polytechnique 91128 Palaiseau Cedex France
| | - Nicolas Casaretto
- Laboratoire de Chimie Moleculaire CNRS UMR 9168 Ecole polytechnique 91128 Palaiseau Cedex France
| | - Samir Z. Zard
- Laboratoire de Synthèse Organique CNRS UMR 7652 Ecole polytechnique 91128 Palaiseau Cedex France
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34
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Goetzke FW, Sidera M, Fletcher SP. Catalytic asymmetric hydrometallation of cyclobutenes with salicylaldehydes. Chem Sci 2022; 13:236-240. [PMID: 35059172 PMCID: PMC8694367 DOI: 10.1039/d1sc06035j] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Accepted: 12/05/2021] [Indexed: 11/21/2022] Open
Abstract
Chiral, substituted cyclobutanes are common motifs in bioactive compounds and intermediates in organic synthesis but few asymmetric routes for their synthesis are known.
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Affiliation(s)
- F. Wieland Goetzke
- Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, UK
| | - Mireia Sidera
- Vertex Pharmaceuticals (Europe) Ltd, 86–88 Jubilee Avenue, Milton Park, Abingdon, OX14 4RW, UK
| | - Stephen P. Fletcher
- Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, UK
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35
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Nájera C, Foubelo F, Sansano JM, Yus M. Enantioselective desymmetrization reactions in asymmetric catalysis. Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.132629] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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36
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Volochnyuk DM, Gorlova AO, Grygorenko OO. Saturated Boronic Acids, Boronates, and Trifluoroborates: An Update on Their Synthetic and Medicinal Chemistry. Chemistry 2021; 27:15277-15326. [PMID: 34499378 DOI: 10.1002/chem.202102108] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Indexed: 12/13/2022]
Abstract
This review discusses recent advances in the chemistry of saturated boronic acids, boronates, and trifluoroborates. Applications of the title compounds in the design of boron-containing drugs are surveyed, with special emphasis on α-amino boronic derivatives. A general overview of saturated boronic compounds as modern tools to construct C(sp3 )-C and C(sp3 )-heteroatom bonds is given, including recent developments in the Suzuki-Miyaura and Chan-Lam cross-couplings, single-electron-transfer processes including metallo- and organocatalytic photoredox reactions, and transformations of boron "ate" complexes. Finally, an attempt to summarize the current state of the art in the synthesis of saturated boronic acids, boronates, and trifluoroborates is made, with a brief mention of the "classical" methods (transmetallation of organolithium/magnesium reagents with boron species, anti-Markovnikov hydroboration of alkenes, and the modification of alkenyl boron compounds) and a special focus on recent methodologies (boronation of alkyl (pseudo)halides, derivatives of carboxylic acids, alcohols, and primary amines, boronative C-H activation, novel approaches to alkene hydroboration, and 1,2-metallate-type rearrangements).
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Affiliation(s)
- Dmitriy M Volochnyuk
- Enamine Ltd. (www.enamine.net), Chervonotkatska 78, Kyiv, 02094, Ukraine.,Taras Shevchenko National University of Kyiv, Volodymyrska Street 60, Kyiv, 01601, Ukraine.,Institute of Organic Chemistry, National Academy of Sciences of Ukraine, Murmanska Street 5, Kyiv, 02094, Ukraine
| | - Alina O Gorlova
- Institute of Organic Chemistry, National Academy of Sciences of Ukraine, Murmanska Street 5, Kyiv, 02094, Ukraine
| | - Oleksandr O Grygorenko
- Enamine Ltd. (www.enamine.net), Chervonotkatska 78, Kyiv, 02094, Ukraine.,Taras Shevchenko National University of Kyiv, Volodymyrska Street 60, Kyiv, 01601, Ukraine
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37
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Michalland J, Casaretto N, Zard SZ. A Modular Access to 1,2- and 1,3-Disubstituted Cyclobutylboronic Esters by Consecutive Radical Additions. Angew Chem Int Ed Engl 2021; 61:e202113333. [PMID: 34716652 DOI: 10.1002/anie.202113333] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Indexed: 01/22/2023]
Abstract
A modular approach to substituted cyclobutylboronic esters is described. It proceeds by successive intermolecular radical additions of xanthates to pinacolato 1-cyclobutenylboronate and to pinacolato bicyclo[1.1.0]but-1-ylboronate. Success hinges on tuning the stability of the α-boryl radical by exploiting the stabilizing influence of the trivalent boronic ester and the slightly destabilizing cyclobutane, which increases the σ-character of the radical. Reductive removal of the xanthate group finally provides a range of 1,2- and 1,3-disubstituted cyclobutylboronic esters. The contrast with cyclopropylboronic esters is striking, since the strong destabilization by the highly strained cyclopropane ring allows the first radical addition to take place but not the second. Furthermore, the first adducts are geminal xanthyl boronic esters that can be converted into cyclobutanones. This chemistry furnishes cyclobutylboronic esters that would be quite difficult to obtain otherwise and thus complements existing methods.
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Affiliation(s)
- Jean Michalland
- Laboratoire de Synthèse Organique, CNRS UMR 7652, Ecole polytechnique, 91128, Palaiseau Cedex, France
| | - Nicolas Casaretto
- Laboratoire de Chimie Moleculaire, CNRS UMR 9168, Ecole polytechnique, 91128, Palaiseau Cedex, France
| | - Samir Z Zard
- Laboratoire de Synthèse Organique, CNRS UMR 7652, Ecole polytechnique, 91128, Palaiseau Cedex, France
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38
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Hu J, Ferger M, Shi Z, Marder TB. Recent advances in asymmetric borylation by transition metal catalysis. Chem Soc Rev 2021; 50:13129-13188. [PMID: 34709239 DOI: 10.1039/d0cs00843e] [Citation(s) in RCA: 89] [Impact Index Per Article: 29.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Chiral organoboronates have played a critical role in organic chemistry and in the development of materials science and pharmaceuticals. Much effort has been devoted to exploring synthetic methodologies for the preparation of these compounds during the past few decades. Among the known methods, asymmetric catalysis has emerged as a practical and highly efficient strategy for their straightforward preparation, and recent years have witnessed remarkable advances in this respect. Approaches such as asymmetric borylative addition, asymmetric allylic borylation and stereospecific cross-coupling borylation, have been extensively explored and well established employing transition-metal catalysis with a chiral ligand. This review provides a comprehensive overview of transition metal-catalysed asymmetric borylation processes to construct carbon-boron, carbon-carbon, and other carbon-heteroatom bonds. It summarises a range of recent achievements in this area of research, with considerable attention devoted to the reaction modes and the mechanisms involved.
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Affiliation(s)
- Jiefeng Hu
- Institute of Inorganic Chemistry, and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany. .,Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, 211816 Nanjing, China
| | - Matthias Ferger
- Institute of Inorganic Chemistry, and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany.
| | - Zhuangzhi Shi
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, 210093 Nanjing, China.
| | - Todd B Marder
- Institute of Inorganic Chemistry, and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany.
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39
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Abstract
![]()
We present a strategy for the synthesis
of spirocyclic cyclobutanes
with modulable exit vectors based on the regioselective monoborylation
of spirocyclobutenes. Using an inexpensive copper salt and a commercially
available bidentate phosphine, a broad variety of borylated spirocycles
have been prepared with complete regiocontrol. The boryl moiety provides
a synthetic handled for further functionalization, allowing access
to a wide array of spirocyclic building blocks from a common intermediate.
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Affiliation(s)
- Luis Nóvoa
- Departamento de Química Orgánica and Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, Madrid 28049, Spain
| | - Laura Trulli
- Departamento de Química Orgánica and Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, Madrid 28049, Spain
| | - Israel Fernández
- Departamento de Química Orgánica I y Centro de Innovación en Química Avanzada (ORFEO-CINQA), Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - Alejandro Parra
- Departamento de Química Orgánica and Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, Madrid 28049, Spain
| | - Mariola Tortosa
- Departamento de Química Orgánica and Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, Madrid 28049, Spain
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40
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Zuccarello G, Escofet I, Caniparoli U, Echavarren AM. New-Generation Ligand Design for the Gold-Catalyzed Asymmetric Activation of Alkynes. Chempluschem 2021; 86:1283-1296. [PMID: 34472729 PMCID: PMC8457203 DOI: 10.1002/cplu.202100232] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Revised: 07/09/2021] [Indexed: 01/01/2023]
Abstract
Gold(I) catalysts are ideal for the activation of alkynes under very mild conditions. However, unlike allenes or alkenes, the triple bond of alkynes cannot be prochiral. In addition, the linear coordination displayed by gold(I) complexes places the chiral ligand far away from the substrate resulting in an inefficient transfer of chiral information. This poses a significant challenge for the achievement of high enantiocontrol in gold(I)-catalyzed reactions of alkynes. Although considerable progress on enantioselective gold(I)-catalyzed transformations has recently been achieved, the asymmetric activation of non-prochiral alkyne-containing small molecules still represents a great challenge. Herein we summarize recent advances in intra- and intermolecular enantioselective gold(I)-catalyzed reactions involving alkynes, discussing new chiral ligand designs that lie at the basis of these developments. We also focus on the mode of action of these catalysts, their possible limitations towards a next-generation of more efficient ligand designs. Finally, square planar chiral gold(III) complexes, which offer an alternative to chiral gold(I) complexes, are also discussed.
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Affiliation(s)
- Giuseppe Zuccarello
- Institute of Chemical Research of Catalonia (ICIQ)Barcelona Institute of Science and Technology (BIST)Av. Països Catalans 1643007TarragonaSpain
- Departament de Química Orgànica i AnalíticaUniversitat Rovira i Virgili (URV)C/Marcel⋅lí Domingo s/n43007TarragonaSpain
| | - Imma Escofet
- Institute of Chemical Research of Catalonia (ICIQ)Barcelona Institute of Science and Technology (BIST)Av. Països Catalans 1643007TarragonaSpain
- Departament de Química Orgànica i AnalíticaUniversitat Rovira i Virgili (URV)C/Marcel⋅lí Domingo s/n43007TarragonaSpain
| | - Ulysse Caniparoli
- Institute of Chemical Research of Catalonia (ICIQ)Barcelona Institute of Science and Technology (BIST)Av. Països Catalans 1643007TarragonaSpain
- Departament de Química Orgànica i AnalíticaUniversitat Rovira i Virgili (URV)C/Marcel⋅lí Domingo s/n43007TarragonaSpain
| | - Antonio M. Echavarren
- Institute of Chemical Research of Catalonia (ICIQ)Barcelona Institute of Science and Technology (BIST)Av. Països Catalans 1643007TarragonaSpain
- Departament de Química Orgànica i AnalíticaUniversitat Rovira i Virgili (URV)C/Marcel⋅lí Domingo s/n43007TarragonaSpain
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41
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Chen J, Shi Z, Li C, Lu P. Catalytic enantioselective synthesis of benzocyclobutenols and cyclobutanols via a sequential reduction/C-H functionalization. Chem Sci 2021; 12:10598-10604. [PMID: 34447553 PMCID: PMC8356817 DOI: 10.1039/d1sc02119b] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Accepted: 07/02/2021] [Indexed: 11/21/2022] Open
Abstract
We report here a sequential enantioselective reduction/C-H functionalization to install contiguous stereogenic carbon centers of benzocyclobutenols and cyclobutanols. This strategy features a practical enantioselective reduction of a ketone and a diastereospecific iridium-catalyzed C-H silylation. Further transformations have been explored, including controllable regioselective ring-opening reactions. In addition, this strategy has been utilized for the synthesis of three natural products, phyllostoxin (proposed structure), grandisol and fragranol.
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Affiliation(s)
- Jun Chen
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University 220 Handan Lu Shanghai 200433 P. R. China
| | - Zhan Shi
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University 220 Handan Lu Shanghai 200433 P. R. China
| | - Chunyu Li
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University 220 Handan Lu Shanghai 200433 P. R. China
| | - Ping Lu
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University 220 Handan Lu Shanghai 200433 P. R. China
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42
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Patel SC, Smith MW, Mercer JAM, Suzuki K, Burns NZ. Enantioselective Cyclobutenylation of Olefins Using N-Sulfonyl-1,2,3-Triazoles as Vicinal Dicarbene Equivalents. Org Lett 2021; 23:6530-6535. [PMID: 34374544 DOI: 10.1021/acs.orglett.1c02331] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Cyclobutenes are highly useful synthetic intermediates as well as important motifs in bioactive small molecules. Herein, we report a regio-, chemo-, and enantioselective synthesis of cyclobutenes from olefins using N-sulfonyl-1,2,3-triazoles as vicinal dicarbene equivalents or alkyne [2 + 2] cycloaddition surrogates. Terminal and cis-olefins can be transformed into enantioenriched cyclopropanes via rhodium catalysis. Then, in one pot, treatment of these intermediates with tosyl hydrazide and base effects diazo formation followed by rhodium-catalyzed ring expansion to yield enantioenriched cyclobutenes. These cyclobutenes can be transformed into highly substituted, enantioenriched cyclobutanes, including structures relevant to natural product scaffolds.
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Affiliation(s)
- Sajan C Patel
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Myles W Smith
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Jaron A M Mercer
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Kensuke Suzuki
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Noah Z Burns
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
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43
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A catalytic asymmetric cross-coupling approach to the synthesis of cyclobutanes. Nat Chem 2021; 13:880-886. [PMID: 34211118 DOI: 10.1038/s41557-021-00725-y] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Accepted: 05/07/2021] [Indexed: 02/08/2023]
Abstract
Stereodefined four-membered rings are common motifs in bioactive molecules and versatile intermediates in organic synthesis. However, the synthesis of complex, chiral cyclobutanes is a largely unsolved problem and there is a need for general and modular synthetic methods. Here we report a series of asymmetric cross-coupling reactions between cyclobutenes and arylboronic acids which are initiated by Rh-catalysed asymmetric carbometallation. After the initial carborhodation, Rh-cyclobutyl intermediates undergo chain-walking or C-H insertion so that overall a variety of additions such as reductive Heck reactions, 1,5-addition and homoallylic substitution are observed. The synthetic applicability of these highly stereoselective transformations is demonstrated in the concise syntheses of the drug candidates Belaperidone and PF-04862853. We anticipate this approach will be widely adopted by synthetic and medicinal chemists. While the carbometallation approach reported here is exemplified with Rh and arylboronic acids, it is likely to be applicable to other metals and nucleophiles.
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44
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Nóvoa L, Trulli L, Parra A, Tortosa M. Stereoselective Diboration of Spirocyclobutenes: A Platform for the Synthesis of Spirocycles with Orthogonal Exit Vectors. Angew Chem Int Ed Engl 2021; 60:11763-11768. [PMID: 33689223 DOI: 10.1002/anie.202101445] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Indexed: 12/13/2022]
Abstract
The diastereo- and enantioselective diboration of spirocyclobutenes provides a platform for the rapid preparation of a wide variety of chiral spirocyclic building blocks. The chemoselective functionalization of the carbon-boron bond in the products, including a stereospecific sp3 -sp2 Suzuki-Miyaura cross-coupling reaction, provides a powerful tool to control the directionality and the nature of the exit vectors in the spirocyclic framework.
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Affiliation(s)
- Luis Nóvoa
- Organic Chemistry Department, Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Laura Trulli
- Organic Chemistry Department, Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Alejandro Parra
- Organic Chemistry Department, Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Mariola Tortosa
- Organic Chemistry Department, Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049, Madrid, Spain
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45
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Scholz SO, Kidd JB, Capaldo L, Flikweert NE, Littlefield RM, Yoon TP. Construction of Complex Cyclobutane Building Blocks by Photosensitized [2 + 2] Cycloaddition of Vinyl Boronate Esters. Org Lett 2021; 23:3496-3501. [PMID: 33844561 DOI: 10.1021/acs.orglett.1c00938] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Cyclobutyl moieties in drug molecules are rare, and in general, they are minimally substituted and stereochemically simple. Methods to assemble structurally complex cyclobutane building blocks suitable for rapid diversification are thus highly desirable. We report herein a photosensitized [2 + 2] cycloaddition with vinyl boronate esters affording straightforward access to complex, densely functionalized cyclobutane scaffolds. Mechanistic studies suggest an activation mode involving energy transfer to the styrenyl alkene rather than the vinyl boronate ester.
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Affiliation(s)
- Spencer O Scholz
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison Wisconsin 53706, United States
| | - Jesse B Kidd
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison Wisconsin 53706, United States
| | - Luca Capaldo
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison Wisconsin 53706, United States.,Photogreen Lab, Department of Chemistry, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy
| | - Niecia E Flikweert
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison Wisconsin 53706, United States
| | - Rowan M Littlefield
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison Wisconsin 53706, United States
| | - Tehshik P Yoon
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison Wisconsin 53706, United States
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46
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Lu P, Wang M, Zhong C. Enantioselective Functionalization of Prochiral Cyclobutanones and Cyclobutenones. Synlett 2021. [DOI: 10.1055/a-1493-9489] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
AbstractEnantioselective synthesis of cyclobutane derivatives is still a challenging topic in asymmetric synthesis. [2+2] Cycloaddition and skeleton rearrangement are two primary strategies to this end. Recently, functionalization of cyclobutanones and cyclobutenones, which are readily available via [2+2] cycloadditions as prochiral substrates, has emerged as a powerful tool to access versatile four-membered ring compounds. Herein, we summarize some recent advances in these areas from our and other groups.1 Introduction2 Enantioselective Functionalization of Cyclobutanones2.1 Chiral Lithium Amide Approach2.2 Enamine Approach3 Enantioselective Functionalization of Cyclobutenones4 Conclusion
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47
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Nóvoa L, Trulli L, Parra A, Tortosa M. Stereoselective Diboration of Spirocyclobutenes: A Platform for the Synthesis of Spirocycles with Orthogonal Exit Vectors. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202101445] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Luis Nóvoa
- Organic Chemistry Department Institute for Advanced Research in Chemical Sciences (IAdChem) Universidad Autónoma de Madrid 28049 Madrid Spain
| | - Laura Trulli
- Organic Chemistry Department Institute for Advanced Research in Chemical Sciences (IAdChem) Universidad Autónoma de Madrid 28049 Madrid Spain
| | - Alejandro Parra
- Organic Chemistry Department Institute for Advanced Research in Chemical Sciences (IAdChem) Universidad Autónoma de Madrid 28049 Madrid Spain
| | - Mariola Tortosa
- Organic Chemistry Department Institute for Advanced Research in Chemical Sciences (IAdChem) Universidad Autónoma de Madrid 28049 Madrid Spain
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48
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Nguyen K, Clement HA, Bernier L, Coe JW, Farrell W, Helal CJ, Reese MR, Sach NW, Lee JC, Hall DG. Catalytic Enantioselective Synthesis of a cis-β-Boronyl Cyclobutylcarboxyester Scaffold and Its Highly Diastereoselective Nickel/Photoredox Dual-Catalyzed Csp3–Csp2 Cross-Coupling to Access Elusive trans-β-Aryl/Heteroaryl Cyclobutylcarboxyesters. ACS Catal 2020. [DOI: 10.1021/acscatal.0c04520] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Kevin Nguyen
- Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - Helen A. Clement
- Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - Louise Bernier
- Pfizer Worldwide Research and Development, La Jolla Laboratories, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Jotham W. Coe
- Pfizer Worldwide Research and Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - William Farrell
- Pfizer Worldwide Research and Development, La Jolla Laboratories, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Christopher J. Helal
- Pfizer Worldwide Research and Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Matthew R. Reese
- Pfizer Worldwide Research and Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Neal W. Sach
- Pfizer Worldwide Research and Development, La Jolla Laboratories, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Jack C. Lee
- Pfizer Worldwide Research and Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Dennis G. Hall
- Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
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49
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Chen X, Chen L, Zhao H, Gao Q, Shen Z, Xu S. Iridium‐Catalyzed
Enantioselective C(sp
3
)–H Borylation of Cyclobutanes. CHINESE J CHEM 2020. [DOI: 10.1002/cjoc.202000240] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Xiang Chen
- College of Chemical Engineering, Zhejiang University of Technology Hangzhou 310014 China
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Center for Excellence in Molecular Synthesis, Suzhou Research Institute, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences Lanzhou 730000 China
| | - Lili Chen
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Center for Excellence in Molecular Synthesis, Suzhou Research Institute, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences Lanzhou 730000 China
| | - Hongliang Zhao
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Center for Excellence in Molecular Synthesis, Suzhou Research Institute, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences Lanzhou 730000 China
| | - Qian Gao
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Center for Excellence in Molecular Synthesis, Suzhou Research Institute, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences Lanzhou 730000 China
| | - Zhenlu Shen
- College of Chemical Engineering, Zhejiang University of Technology Hangzhou 310014 China
| | - Senmiao Xu
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Center for Excellence in Molecular Synthesis, Suzhou Research Institute, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences Lanzhou 730000 China
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University Hangzhou 311121 China
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Hoveyda AH, Zhou Y, Shi Y, Brown MK, Wu H, Torker S. Sulfonate N‐Heterocyclic Carbene–Copper Complexes: Uniquely Effective Catalysts for Enantioselective Synthesis of C−C, C−B, C−H, and C−Si Bonds. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202003755] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Amir H. Hoveyda
- Department of Chemistry Merkert Chemistry Center Boston College Chestnut Hill MA 02467 USA
- Supramolecular Science and Engineering Institute University of Strasbourg CNRS 67000 Strasbourg France
| | - Yuebiao Zhou
- Department of Chemistry Merkert Chemistry Center Boston College Chestnut Hill MA 02467 USA
| | - Ying Shi
- Department of Chemistry Merkert Chemistry Center Boston College Chestnut Hill MA 02467 USA
| | - M. Kevin Brown
- Department of Chemistry Merkert Chemistry Center Boston College Chestnut Hill MA 02467 USA
| | - Hao Wu
- Department of Chemistry Merkert Chemistry Center Boston College Chestnut Hill MA 02467 USA
| | - Sebastian Torker
- Department of Chemistry Merkert Chemistry Center Boston College Chestnut Hill MA 02467 USA
- Supramolecular Science and Engineering Institute University of Strasbourg CNRS 67000 Strasbourg France
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