1
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Wang J, Zheng WF, Zhang X, Qian H, Ma S. Stereoselectivity control in Rh-catalyzed β-OH elimination for chiral allene formation. Nat Commun 2023; 14:7399. [PMID: 37968338 PMCID: PMC10651921 DOI: 10.1038/s41467-023-42660-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Accepted: 10/18/2023] [Indexed: 11/17/2023] Open
Abstract
Stereoselectivity control and understanding in the metal-catalyzed reactions are fundamental issues in catalysis. Here we report sterically controlled rhodium-catalyzed SN2'-type substitution reactions of optically active tertiary propargylic alcohols with arylmetallic species affording the non-readily available enantioenriched tetrasubstituted allenes via either exclusive syn- or anti-β-OH elimination, respectively, under two sets of different reaction parameters. Detailed mechanistic experiments and density functional theory (DFT) studies reveal that the exclusive anti-Rh(I)-OH elimination is dictated by the simultaneous aid of in situ generated boric acid and ambient water, which act as the shuttle in the hydroxy relay to facilitate the Rh(I)-OH elimination process via a unique ten-membered cyclic transition state (anti-TS2_u). By contrast, the syn-Rh(III)-OH elimination in C-H bond activation-based allenylation reaction is controlled by a four-membered cyclic transition state (syn-TS3) due to the steric surroundings around the Rh(III) center preventing the approach of the other assisting molecules. Under the guidance of these mechanistic understandings, a stereodivergent protocol to construct the enantiomer of optically active tetrasubstituted allenes from the same starting materials is successfully developed.
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Affiliation(s)
- Jie Wang
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, Shanghai, 200433, PR China
| | - Wei-Feng Zheng
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, Shanghai, 200433, PR China
| | - Xue Zhang
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, 200032, PR China.
| | - Hui Qian
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, Shanghai, 200433, PR China.
| | - Shengming Ma
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, Shanghai, 200433, PR China.
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, 200032, PR China.
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2
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Pavlíčková T, Stöckl Y, Marek I. Synthesis and Functionalization of Tertiary Propargylic Boronic Esters by Alkynyllithium-Mediated 1,2-Metalate Rearrangement of Borylated Cyclopropanes. Org Lett 2022; 24:8901-8906. [PMID: 36446049 PMCID: PMC9791689 DOI: 10.1021/acs.orglett.2c03756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Implementing the use of alkynyllithium reagents in a stereospecific 1,2-metalate rearrangement-mediated ring opening of polysubstituted cyclopropyl boronic esters provides a variety of tertiary pinacol boranes bearing adjacent tertiary or quaternary carbon stereocenters with high levels of diastereomeric purity. The potential of this strategy was demonstrated through a selection of α- and γ-functionalization of the propargyl boronic esters.
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3
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Xu J, He Z, Zhang J, Chen J, Huang Y. A Thioether‐Catalyzed Cross‐Coupling Reaction of Allyl Halides and Arylboronic Acids. Angew Chem Int Ed Engl 2022; 61:e202211408. [DOI: 10.1002/anie.202211408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Indexed: 11/09/2022]
Affiliation(s)
- Jingwei Xu
- State Key Laboratory of Chemical Oncogenomics Peking University Shenzhen Graduate School Shenzhen 518055 China
- Pingshan Translational Medicine Center Shenzhen Bay Laboratory Shenzhen 518118 China
| | - Zhiqi He
- State Key Laboratory of Chemical Oncogenomics Peking University Shenzhen Graduate School Shenzhen 518055 China
| | - Jiwei Zhang
- Department of Chemistry The Hong Kong University of Science and Technology Clear Water Bay, Kowloon Hong Kong SAR China
| | - Jiean Chen
- Pingshan Translational Medicine Center Shenzhen Bay Laboratory Shenzhen 518118 China
| | - Yong Huang
- Department of Chemistry The Hong Kong University of Science and Technology Clear Water Bay, Kowloon Hong Kong SAR China
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4
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Xu J, He Z, Zhang J, Chen J, Huang Y. A Thioether‐Catalyzed Cross‐Coupling Reaction of Allyl Halides and Arylboronic Acids. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202211408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jingwei Xu
- Peking University Shenzhen Graduate School School of Chemical Biology and Biotechnology CHINA
| | - Zhiqi He
- Peking University Shenzhen Graduate School School of Chemical Biology and Biotechnology CHINA
| | - Jiwei Zhang
- Hong Kong University of Science and Technology School of Science Department of Chemistry HONG KONG
| | - Jiean Chen
- SZBL: Shenzhen Bay Laboratory Pingshan Translational Medicine Center CHINA
| | - Yong Huang
- The Hong Kong University of Science and Technology Chemistry Clear Water Bay 00000 Hong Kong HONG KONG
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5
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LaPorte AJ, Shi Y, Hein JE, Burke MD. Stereospecific Csp 3 Suzuki–Miyaura Cross-Coupling That Evades β-Oxygen Elimination. ACS Catal 2022. [DOI: 10.1021/acscatal.2c03245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Antonio J. LaPorte
- Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
| | - Yao Shi
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z3, Canada
| | - Jason E. Hein
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z3, Canada
| | - Martin D. Burke
- Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
- Carle Illinois College of Medicine, University of Illinois, Urbana, Illinois 61801, United States
- Department of Biochemistry, University of Illinois, Urbana, Illinois 61801, United States
- Arnold and Mabel Beckman Institute, University of Illinois, Urbana, Illinois 61801, United States
- Carl R. Woese Institute for Genomic Biology, University of Illinois, Urbana, Illinois 61801, United States
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6
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Zou HN, Zhao YT, Yang LL, Huang MY, Zhang JW, Huang ML, Zhu SF. Catalytic Asymmetric Synthesis of Chiral Propargylic Boron Compounds through B–H Bond Insertion Reactions. ACS Catal 2022. [DOI: 10.1021/acscatal.2c02956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hui-Na Zou
- Frontiers Science Center for New Organic Matter, State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Yu-Tao Zhao
- Frontiers Science Center for New Organic Matter, State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Liang-Liang Yang
- Frontiers Science Center for New Organic Matter, State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Ming-Yao Huang
- Frontiers Science Center for New Organic Matter, State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Jing-Wei Zhang
- Frontiers Science Center for New Organic Matter, State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Meng-Lin Huang
- Frontiers Science Center for New Organic Matter, State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Shou-Fei Zhu
- Frontiers Science Center for New Organic Matter, State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
- Haihe Laboratory of Sustainable Chemical Transformations, Tianjin 300192, China
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7
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Grayson JD, Dennis FM, Robertson CC, Partridge BM. Chan-Lam Amination of Secondary and Tertiary Benzylic Boronic Esters. J Org Chem 2021; 86:9883-9897. [PMID: 34169720 DOI: 10.1021/acs.joc.1c00976] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
We report a Chan-Lam coupling reaction of benzylic and allylic boronic esters with primary and secondary anilines to form valuable alkyl amine products. Both secondary and tertiary boronic esters can be used as coupling partners, with mono-alkylation of the aniline occurring selectively. This is a rare example of a transition-metal-mediated transformation of a tertiary alkylboron reagent. Initial investigation into the reaction mechanism suggests that transmetalation from B to Cu occurs through a single-electron, rather than a two-electron process.
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Affiliation(s)
- James D Grayson
- Department of Chemistry, University of Sheffield, Dainton Building, Sheffield S3 7HF, United Kingdom
| | - Francesca M Dennis
- Department of Chemistry, University of Sheffield, Dainton Building, Sheffield S3 7HF, United Kingdom
| | - Craig C Robertson
- Department of Chemistry, University of Sheffield, Dainton Building, Sheffield S3 7HF, United Kingdom
| | - Benjamin M Partridge
- Department of Chemistry, University of Sheffield, Dainton Building, Sheffield S3 7HF, United Kingdom
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8
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Mykura RC, Songara P, Luc E, Rogers J, Stammers E, Aggarwal VK. Studies on the Lithiation, Borylation, and 1,2‐Metalate Rearrangement of
O
‐Cycloalkyl 2,4,6‐Triisopropylbenzoates. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202101374] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Rory C. Mykura
- Department of Chemistry University of Bristol Cantock's Close Bristol BS8 1TS UK
| | - Pradip Songara
- Department of Chemistry University of Bristol Cantock's Close Bristol BS8 1TS UK
| | - Eugenia Luc
- Department of Chemistry University of Bristol Cantock's Close Bristol BS8 1TS UK
| | - Jack Rogers
- Department of Chemistry University of Bristol Cantock's Close Bristol BS8 1TS UK
| | - Ellie Stammers
- Department of Chemistry University of Bristol Cantock's Close Bristol BS8 1TS UK
| | - Varinder K. Aggarwal
- Department of Chemistry University of Bristol Cantock's Close Bristol BS8 1TS UK
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9
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Mykura RC, Songara P, Luc E, Rogers J, Stammers E, Aggarwal VK. Studies on the Lithiation, Borylation, and 1,2-Metalate Rearrangement of O-Cycloalkyl 2,4,6-Triisopropylbenzoates. Angew Chem Int Ed Engl 2021; 60:11436-11441. [PMID: 33651488 PMCID: PMC8251992 DOI: 10.1002/anie.202101374] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Indexed: 12/29/2022]
Abstract
A broad range of acyclic primary and secondary 2,4,6‐triisopropylbenzoate (TIB) esters have been used in lithiation‐borylation reactions, but cyclic TIB esters have not. We have studied the use of cyclic TIB esters in lithiation‐borylation reactions and looked at the effect of ring size (3‐ → 6‐membered rings) on the three key steps of the lithiation‐borylation protocol: deprotonation, borylation and 1,2‐metalate rearrangement. Although all rings sizes could be deprotonated, the cyclohexyl case was impractically slow, and the cyclopentyl example underwent α‐elimination faster than deprotonation at −78 °C and so could not be used. Both cyclobutyl and cyclopropyl cases underwent rapid borylation, but only the cyclobutyl substrate underwent 1,2‐metalate rearrangement. Thus, the cyclobutyl TIB ester occupies a “Goldilocks zone,” being small enough for deprotonation and large enough to enable 1,2‐migration. The generality of the reaction was explored with a broad range of boronic esters.
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Affiliation(s)
- Rory C Mykura
- Department of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK
| | - Pradip Songara
- Department of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK
| | - Eugenia Luc
- Department of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK
| | - Jack Rogers
- Department of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK
| | - Ellie Stammers
- Department of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK
| | - Varinder K Aggarwal
- Department of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK
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10
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Murray B, Zhao S, Aramini JM, Wang H, Biscoe MR. The Stereochemical Course of Pd-Catalyzed Suzuki Reactions Using Primary Alkyltrifluoroborate Nucleophiles. ACS Catal 2021; 11:2504-2510. [PMID: 34667656 DOI: 10.1021/acscatal.0c04325] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Using deuterium-labeled stereochemical probes, we show that primary alkyltrifluoroborate nucleophiles undergo transmetalation to palladium exclusively via a stereoretentive pathway and that the resulting stereospecificity is broadly independent of electronic and steric effects. This stands in stark contrast to the stereochemical course of transmetalation for secondary alkyltrifluoroborates, which varies between net stereoretention and net stereoinversion depending upon the electronic properties of the supporting phosphine ligand, the electronic properties of the aryl electrophile, and the steric properties of the alkylboron nucleophile. In this study, we additionally show that the stereochemical course of transmetalation for secondary alkylboron reagents can be under reagent steric control, while no such steric control exists for analogous primary alkylboron nucleophiles. The combined study reveals fundamental mechanistic differences between transmetalations of primary and secondary alkylboron reagents in Pd-catalyzed Suzuki reactions.
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Affiliation(s)
- Benjamin Murray
- Department of Chemistry & Biochemistry, The City College of New York (CCNY), 160 Convent Avenue, New York, New York 10031, United States
- Ph.D. Program in Chemistry, The Graduate Center of the City University of New York (CUNY), 365 Fifth Avenue, New York, New York 10016, United States
| | - Shibin Zhao
- Department of Chemistry & Biochemistry, The City College of New York (CCNY), 160 Convent Avenue, New York, New York 10031, United States
- Ph.D. Program in Chemistry, The Graduate Center of the City University of New York (CUNY), 365 Fifth Avenue, New York, New York 10016, United States
| | - James M. Aramini
- CUNY Advanced Science Research Center, 85 Saint Nicholas Terrace, New York, New York 10031, United States
| | - Hsin Wang
- Department of Chemistry & Biochemistry, The City College of New York (CCNY), 160 Convent Avenue, New York, New York 10031, United States
| | - Mark R. Biscoe
- Department of Chemistry & Biochemistry, The City College of New York (CCNY), 160 Convent Avenue, New York, New York 10031, United States
- Ph.D. Program in Chemistry, The Graduate Center of the City University of New York (CUNY), 365 Fifth Avenue, New York, New York 10016, United States
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11
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Stereoselectivity in Pd-catalysed cross-coupling reactions of enantioenriched nucleophiles. Nat Rev Chem 2020; 4:584-599. [PMID: 33869786 DOI: 10.1038/s41570-020-00222-9] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Advances in Pd-catalysed cross-coupling reactions have facilitated the development of stereospecific variants enabling the use of configurationally stable, enantioenriched, main-group organometallic nucleophiles to form C(sp 3)-C(sp 2) bonds. Such stereospecific cross-coupling reactions constitute a powerful synthetic approach to attaining precise 3D control of molecular structure, allowing new stereogenic centres to be readily introduced into molecular architectures. Examples of stereospecific, Pd-catalysed cross-coupling reactions have been reported for isolable enantioenriched alkylboron, alkyltin, alkylgermanium and alkylsilicon nucleophiles. In these reactions, a single, dominant stereospecific pathway of transmetallation to palladium is required to effect efficient chirality transfer to the cross-coupled product. However, the potential for competing stereoretentive and stereoinvertive pathways of transmetallation complicates the stereochemical transfer in these processes and impedes the rational development of new stereospecific cross-coupling variants. In this Review, we describe the use of enantioenriched organometallic nucleophiles in stereospecific, Pd-catalysed cross-coupling reactions. We focus on systems involving well-defined, isolable, enantioenriched nucleophiles in which a clear stereochemical course of transmetallation is followed. Specific modes of electronic activation that influence the reactivity of alkylmetal nucleophiles are described and presented in the context of their impact on the stereochemical course of cross-coupling reactions. We expect that this Review will serve as a valuable resource to assist in deconvoluting the many considerations that potentially impact the stereochemical outcome of Pd-catalysed cross-coupling reactions.
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12
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Zhu WR, Su Q, Diao HJ, Wang EX, Wu F, Zhao YL, Weng J, Lu G. Enantioselective Dehydrative γ-Arylation of α-Indolyl Propargylic Alcohols with Phenols: Access to Chiral Tetrasubstituted Allenes and Naphthopyrans. Org Lett 2020; 22:6873-6878. [PMID: 32808789 DOI: 10.1021/acs.orglett.0c02386] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Herein, we report an enantioselective dehydrative γ-arylation of α-indolyl propargylic alcohols with phenols via organocatalysis, which provides efficient access to chiral tetrasubstituted allenes and naphthopyrans in high yields with excellent regio- and enantioselectivities under mild conditions. This method features the use of cheaply available naphthols/phenols as the C-H aryl source and liberating water as the sole byproduct. Control experiments suggest that the excellent enantioselectivity and remote regioselectivity stem from dual hydrogen-bonding interaction with the chiral phosphoric acid catalyst.
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Affiliation(s)
- Wen-Run Zhu
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, P. R. China
| | - Qiong Su
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, P. R. China
| | - Hong-Juan Diao
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, P. R. China
| | - Er-Xuan Wang
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, P. R. China
| | - Feng Wu
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, P. R. China
| | - Yun-Long Zhao
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, P. R. China
| | - Jiang Weng
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, P. R. China
| | - Gui Lu
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, P. R. China
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13
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Li Y, Wei H, Wu D, Li Z, Wang W, Yin G. Nickel-Catalyzed Chemodivergent 1,1-Difunctionalization of Unactivated α-Olefins with Alkynyl Electrophiles and B2pin2. ACS Catal 2020. [DOI: 10.1021/acscatal.0c00898] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Yangyang Li
- The Institute for Advanced Studies, Wuhan University, Wuhan, Hubei 430072, People’s Republic of China
| | - Hong Wei
- The Institute for Advanced Studies, Wuhan University, Wuhan, Hubei 430072, People’s Republic of China
| | - Dong Wu
- The Institute for Advanced Studies, Wuhan University, Wuhan, Hubei 430072, People’s Republic of China
| | - Zheqi Li
- The Institute for Advanced Studies, Wuhan University, Wuhan, Hubei 430072, People’s Republic of China
| | - Wang Wang
- The Institute for Advanced Studies, Wuhan University, Wuhan, Hubei 430072, People’s Republic of China
| | - Guoyin Yin
- The Institute for Advanced Studies, Wuhan University, Wuhan, Hubei 430072, People’s Republic of China
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14
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Ma X, Zhao H, Binayeva M, Ralph G, Diane M, Zhao S, Wang CY, Biscoe MR. A General Approach to Stereospecific Cross-Coupling Reactions of Nitrogen-Containing Stereocenters. Chem 2020; 6:781-791. [PMID: 32440572 DOI: 10.1016/j.chempr.2020.02.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A novel strategy employing cyclohexyl spectator ligands in Stille cross-coupling reactions has been developed as a general solution to the long-standing challenge of conducting stereospecific cross-coupling reactions at nitrogen-containing stereocenters. This method enables direct access to enantioenriched products that are difficult (or impossible) to obtain via alternative preparative methods. Selective and predictable transfer of a single secondary alkyl unit can be achieved under reaction conditions that exploit subtle electronic differences between activated and unactivated alkyl units. Through this approach, enantioenriched α-stannylated nitrogen-containing stereocenters undergo Pd-catalyzed arylation and acylation reactions with exceptionally high stereofidelity in all instances investigated. We demonstrate this process by using α-stannylated pyrrolidine, azetidine, and open-chain (benzylic and non-benzylic) nucleophiles in stereospecific reactions. This process will facilitate rapid and reliable access to enantioenriched compounds possessing nitrogen-substituted stereocenters, which constitute ubiquitous structural motifs in biologically active compounds emerging from the drug-discovery process.
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Affiliation(s)
- Xinghua Ma
- Department of Chemistry & Biochemistry, The City College of New York, 160 Convent Ave., New York, NY 10031, USA.,PhD Program in Chemistry, Graduate Center of the City University of New York, 365 Fifth Ave., New York, NY 10016, USA
| | - Haoran Zhao
- Department of Chemistry & Biochemistry, The City College of New York, 160 Convent Ave., New York, NY 10031, USA.,PhD Program in Chemistry, Graduate Center of the City University of New York, 365 Fifth Ave., New York, NY 10016, USA
| | - Meruyert Binayeva
- Department of Chemistry & Biochemistry, The City College of New York, 160 Convent Ave., New York, NY 10031, USA.,PhD Program in Chemistry, Graduate Center of the City University of New York, 365 Fifth Ave., New York, NY 10016, USA
| | - Glenn Ralph
- Department of Chemistry & Biochemistry, The City College of New York, 160 Convent Ave., New York, NY 10031, USA.,PhD Program in Chemistry, Graduate Center of the City University of New York, 365 Fifth Ave., New York, NY 10016, USA
| | - Mohamed Diane
- Department of Chemistry & Biochemistry, The City College of New York, 160 Convent Ave., New York, NY 10031, USA.,PhD Program in Chemistry, Graduate Center of the City University of New York, 365 Fifth Ave., New York, NY 10016, USA
| | - Shibin Zhao
- Department of Chemistry & Biochemistry, The City College of New York, 160 Convent Ave., New York, NY 10031, USA.,PhD Program in Chemistry, Graduate Center of the City University of New York, 365 Fifth Ave., New York, NY 10016, USA
| | - Chao-Yuan Wang
- Department of Chemistry & Biochemistry, The City College of New York, 160 Convent Ave., New York, NY 10031, USA.,PhD Program in Chemistry, Graduate Center of the City University of New York, 365 Fifth Ave., New York, NY 10016, USA
| | - Mark R Biscoe
- Department of Chemistry & Biochemistry, The City College of New York, 160 Convent Ave., New York, NY 10031, USA.,PhD Program in Chemistry, Graduate Center of the City University of New York, 365 Fifth Ave., New York, NY 10016, USA.,Lead Contact
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15
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Das KK, Paul S, Panda S. Transition metal-free synthesis of alkyl pinacol boronates. Org Biomol Chem 2020; 18:8939-8974. [DOI: 10.1039/d0ob01721c] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
This review systematically outlined the research in the area of transition metal free synthesis of alkyl pinacol boronates, which are versatile and important scaffolds to construct diverse organic compounds.
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Affiliation(s)
- Kanak Kanti Das
- Department of Chemistry
- Indian Institute of Technology Kharagpur
- Kharagpur 721302
- India
| | - Swagata Paul
- Department of Chemistry
- Indian Institute of Technology Kharagpur
- Kharagpur 721302
- India
| | - Santanu Panda
- Department of Chemistry
- Indian Institute of Technology Kharagpur
- Kharagpur 721302
- India
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16
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Chen J, Gao S, Chen M. Cu-Catalyzed Silylation and Borylation of Vinylidene Cyclopropanes. Org Lett 2019; 21:8800-8804. [DOI: 10.1021/acs.orglett.9b03354] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Jichao Chen
- Department of Chemistry and Biochemistry, Auburn University, Auburn, Alabama 36849, United States
| | - Shang Gao
- Department of Chemistry and Biochemistry, Auburn University, Auburn, Alabama 36849, United States
| | - Ming Chen
- Department of Chemistry and Biochemistry, Auburn University, Auburn, Alabama 36849, United States
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17
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Scheipers I, Mück‐Lichtenfeld C, Studer A. Palladium‐Catalyzed Decarboxylative γ‐Arylation for the Synthesis of Tetrasubstituted Chiral Allenes. Angew Chem Int Ed Engl 2019; 58:6545-6548. [DOI: 10.1002/anie.201901848] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Indexed: 12/28/2022]
Affiliation(s)
- Ina Scheipers
- Westfälische Wilhelms-UniversitätOrganisch-Chemisches Institut Corrensstraße 40 48149 Münster Germany
| | | | - Armido Studer
- Westfälische Wilhelms-UniversitätOrganisch-Chemisches Institut Corrensstraße 40 48149 Münster Germany
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18
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Scheipers I, Mück‐Lichtenfeld C, Studer A. Palladiumkatalysierte decarboxylierende γ‐Arylierung: Ein Zugang zu tetrasubstituierten chiralen Allenen. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201901848] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Ina Scheipers
- Westfälische Wilhelms-UniversitätOrganisch-Chemisches Institut Corrensstraße 40 48149 Münster Deutschland
| | - Christian Mück‐Lichtenfeld
- Westfälische Wilhelms-UniversitätOrganisch-Chemisches Institut Corrensstraße 40 48149 Münster Deutschland
| | - Armido Studer
- Westfälische Wilhelms-UniversitätOrganisch-Chemisches Institut Corrensstraße 40 48149 Münster Deutschland
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19
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Rubial B, Collins BSL, Bigler R, Aichhorn S, Noble A, Aggarwal VK. Enantiospecific Synthesis of ortho-Substituted 1,1-Diarylalkanes by a 1,2-Metalate Rearrangement/anti-S N 2' Elimination/Rearomatizing Allylic Suzuki-Miyaura Reaction Sequence. Angew Chem Int Ed Engl 2019; 58:1366-1370. [PMID: 30520228 PMCID: PMC6391954 DOI: 10.1002/anie.201811343] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Indexed: 12/12/2022]
Abstract
The one-pot sequential coupling of benzylamines, boronic esters, and aryl iodides has been investigated. In the presence of an N-activator, the boronate complex formed from an ortho-lithiated benzylamine and a boronic ester undergoes stereospecific 1,2-metalate rearrangement/anti-SN 2' elimination to form a dearomatized tertiary boronic ester. Treatment with an aryl iodide under palladium catalysis leads to rearomatizing γ-selective allylic Suzuki-Miyaura cross-coupling to generate 1,1-diarylalkanes. When enantioenriched α-substituted benzylamines are employed, the corresponding 1,1-diarylalkanes are formed with high stereospecificity.
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Affiliation(s)
- Belén Rubial
- School of ChemistryUniversity of BristolCantock's CloseBristolBS8 1TSUK
| | | | - Raphael Bigler
- School of ChemistryUniversity of BristolCantock's CloseBristolBS8 1TSUK
| | - Stefan Aichhorn
- School of ChemistryUniversity of BristolCantock's CloseBristolBS8 1TSUK
| | - Adam Noble
- School of ChemistryUniversity of BristolCantock's CloseBristolBS8 1TSUK
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20
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Rubial B, Collins BSL, Bigler R, Aichhorn S, Noble A, Aggarwal VK. Enantiospecific Synthesis of ortho
-Substituted 1,1-Diarylalkanes by a 1,2-Metalate Rearrangement/anti
-S
N
2′ Elimination/Rearomatizing Allylic Suzuki-Miyaura Reaction Sequence. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201811343] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Belén Rubial
- School of Chemistry; University of Bristol; Cantock's Close Bristol BS8 1TS UK
| | | | - Raphael Bigler
- School of Chemistry; University of Bristol; Cantock's Close Bristol BS8 1TS UK
| | - Stefan Aichhorn
- School of Chemistry; University of Bristol; Cantock's Close Bristol BS8 1TS UK
| | - Adam Noble
- School of Chemistry; University of Bristol; Cantock's Close Bristol BS8 1TS UK
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21
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Zhao S, Gensch T, Murray B, Niemeyer ZL, Sigman MS, Biscoe MR. Enantiodivergent Pd-catalyzed C-C bond formation enabled through ligand parameterization. Science 2018; 362:670-674. [PMID: 30237245 PMCID: PMC6613548 DOI: 10.1126/science.aat2299] [Citation(s) in RCA: 107] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Accepted: 09/06/2018] [Indexed: 01/01/2023]
Abstract
Despite the enormous potential for the use of stereospecific cross-coupling reactions to rationally manipulate the three-dimensional structure of organic molecules, the factors that control the transfer of stereochemistry in these reactions remain poorly understood. Here we report a mechanistic and synthetic investigation into the use of enantioenriched alkylboron nucleophiles in stereospecific Pd-catalyzed Suzuki cross-coupling reactions. By developing a suite of molecular descriptors of phosphine ligands, we could apply predictive statistical models to select or design distinct ligands that respectively promoted stereoinvertive and stereoretentive cross-coupling reactions. Stereodefined branched structures were thereby accessed through the predictable manipulation of absolute stereochemistry, and a general model for the mechanism of alkylboron transmetallation was proposed.
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Affiliation(s)
- Shibin Zhao
- Department of Chemistry, The City College of New York, 160 Convent Avenue, New York, NY 10031, USA
- Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, 365 Fifth Avenue, New York, NY 10016, USA
| | - Tobias Gensch
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, UT 84112, USA
| | - Benjamin Murray
- Department of Chemistry, The City College of New York, 160 Convent Avenue, New York, NY 10031, USA
- Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, 365 Fifth Avenue, New York, NY 10016, USA
| | - Zachary L Niemeyer
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, UT 84112, USA
| | - Matthew S Sigman
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, UT 84112, USA.
| | - Mark R Biscoe
- Department of Chemistry, The City College of New York, 160 Convent Avenue, New York, NY 10031, USA.
- Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, 365 Fifth Avenue, New York, NY 10016, USA
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22
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Armstrong RJ, Nandakumar M, Dias RMP, Noble A, Myers EL, Aggarwal VK. Enantiodivergent Synthesis of Allenes by Point-to-Axial Chirality Transfer. Angew Chem Int Ed Engl 2018; 57:8203-8208. [PMID: 29719111 PMCID: PMC6033179 DOI: 10.1002/anie.201804446] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Indexed: 11/11/2022]
Abstract
An enantiodivergent method for the synthesis of multiply substituted allenes is described. Highly enantioenriched, point-chiral boronic esters were synthesized by homologation of α-seleno alkenyl boronic esters with lithiated carbamates and eliminated to form axially chiral allene products. By employing either oxidative or alkylative conditions, both syn and anti elimination could be achieved with complete stereospecificity. The process enables the synthesis of either M or P allenes from a single isomer of a point-chiral precursor and can be employed for the enantioselective assembly of di-, tri-, and tetrasubstituted allenes.
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Affiliation(s)
- Roly J. Armstrong
- School of ChemistryUniversity of BristolCantock's CloseBristolBS8 1TSUK
| | | | - Rafael M. P. Dias
- School of ChemistryUniversity of BristolCantock's CloseBristolBS8 1TSUK
| | - Adam Noble
- School of ChemistryUniversity of BristolCantock's CloseBristolBS8 1TSUK
| | - Eddie L. Myers
- School of ChemistryUniversity of BristolCantock's CloseBristolBS8 1TSUK
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23
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Armstrong RJ, Nandakumar M, Dias RMP, Noble A, Myers EL, Aggarwal VK. Enantiodivergent Synthesis of Allenes by Point‐to‐Axial Chirality Transfer. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201804446] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Roly J. Armstrong
- School of ChemistryUniversity of Bristol Cantock's Close Bristol BS8 1TS UK
| | | | - Rafael M. P. Dias
- School of ChemistryUniversity of Bristol Cantock's Close Bristol BS8 1TS UK
| | - Adam Noble
- School of ChemistryUniversity of Bristol Cantock's Close Bristol BS8 1TS UK
| | - Eddie L. Myers
- School of ChemistryUniversity of Bristol Cantock's Close Bristol BS8 1TS UK
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24
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Zhao J, Jonker SJT, Meyer DN, Schulz G, Tran CD, Eriksson L, Szabó KJ. Copper-catalyzed synthesis of allenylboronic acids. Access to sterically encumbered homopropargylic alcohols and amines by propargylboration. Chem Sci 2018; 9:3305-3312. [PMID: 29732108 PMCID: PMC5915797 DOI: 10.1039/c7sc05123a] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Accepted: 02/17/2018] [Indexed: 12/21/2022] Open
Abstract
Tri- and tetrasubstituted allenylboronic acids were prepared via a new versatile copper-catalyzed methodology. The densely functionalized allenylboronic acids readily undergo propargylboration reactions with ketones and imines without any additives. Catalytic asymmetric propargylborylation of ketones is demonstrated with high stereoselectivity allowing for the synthesis of highly enantioenriched tertiary homopropargyl alcohols. The reaction is suitable for kinetic resolution of racemic allenylboronic acids affording alkynes with adjacent quaternary stereocenters.
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Affiliation(s)
- Jian Zhao
- Department of Organic Chemistry , Stockholm University , SE-106 91 Stockholm , Sweden .
| | - Sybrand J T Jonker
- Department of Organic Chemistry , Stockholm University , SE-106 91 Stockholm , Sweden .
| | - Denise N Meyer
- Department of Organic Chemistry , Stockholm University , SE-106 91 Stockholm , Sweden .
| | - Göran Schulz
- Department of Organic Chemistry , Stockholm University , SE-106 91 Stockholm , Sweden .
| | - C Duc Tran
- Department of Organic Chemistry , Stockholm University , SE-106 91 Stockholm , Sweden .
| | - Lars Eriksson
- Department of Materials and Environmental Chemistry , Stockholm University , SE-106 91 Stockholm , Sweden
| | - Kálmán J Szabó
- Department of Organic Chemistry , Stockholm University , SE-106 91 Stockholm , Sweden .
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25
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He Z, Song F, Sun H, Huang Y. Transition-Metal-Free Suzuki-Type Cross-Coupling Reaction of Benzyl Halides and Boronic Acids via 1,2-Metalate Shift. J Am Chem Soc 2018; 140:2693-2699. [PMID: 29360376 DOI: 10.1021/jacs.8b00380] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Cross-coupling of organoboron compounds with electrophiles (Suzuki-Miyaura reaction) has greatly advanced C-C bond formation and has been well received in medicinal chemistry. During the past 50 years, transition metals have played a central role throughout the catalytic cycle of this important transformation. In this process, chemoselectivity among multiple carbon-halogen bonds is a common challenge. In particular, selective oxidative addition of transition metals to alkyl halides rather than aryl halides is difficult due to unfavorable transition states and bond strengths. We describe a new approach that uses a single organic sulfide catalyst to activate both C(sp3) halides and arylboronic acids via a zwitterionic boron "ate" intermediate. This "ate" species undergoes a 1,2-metalate shift to afford Suzuki coupling products using benzyl chlorides and arylboronic acids. Various diaryl methane analogues can be prepared, including those with complex and biologically active motifs. The reactions proceed under transition-metal-free conditions, and C(sp2) halides, including aryl bromides and iodides, are unaffected. The orthogonal chemoselectivity is demonstrated in the streamlined synthesis of highly functionalized diaryl methane scaffolds using multi-halogenated substrates. Preliminary mechanistic experiments suggest both the sulfonium salt and the sulfur ylide are involved in the reaction, with the formation of sulfonium salt being the slowest step in the overall catalytic cycle.
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Affiliation(s)
- Zhiqi He
- Key Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Shenzhen Graduate School, Peking University , Shenzhen 518055, China
| | - Feifei Song
- Key Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Shenzhen Graduate School, Peking University , Shenzhen 518055, China
| | - Huan Sun
- Key Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Shenzhen Graduate School, Peking University , Shenzhen 518055, China
| | - Yong Huang
- Key Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Shenzhen Graduate School, Peking University , Shenzhen 518055, China
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26
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Rygus JPG, Crudden CM. Enantiospecific and Iterative Suzuki–Miyaura Cross-Couplings. J Am Chem Soc 2017; 139:18124-18137. [DOI: 10.1021/jacs.7b08326] [Citation(s) in RCA: 125] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Jason P. G. Rygus
- Department
of Chemistry, Queen’s University, Chernoff Hall, Kingston, Ontario K7L
3N6, Canada
| | - Cathleen M. Crudden
- Department
of Chemistry, Queen’s University, Chernoff Hall, Kingston, Ontario K7L
3N6, Canada
- Institute
of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Chikusa, Nagoya 464-8601, Japan
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27
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Zhao H, Tong M, Wang H, Xu S. Transition-metal-free synthesis of 1,1-diboronate esters with a fully substituted benzylic center via diborylation of lithiated carbamates. Org Biomol Chem 2017; 15:3418-3422. [DOI: 10.1039/c7ob00654c] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Diborylation of lithiated carbamates is reported for the first time to synthesize 1,1-diboronate esters with a fully substituted benzylic center.
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Affiliation(s)
- Haonan Zhao
- Key Laboratory of Synthetic and Biological Colloids
- Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi 214122
| | - Min Tong
- State Key Laboratory for Oxo Synthesis and Selective Oxidation
- Suzhou Research Institute
- Lanzhou Institute of Chemical Physics (LICP)
- Chinese Academy of Sciences
- Lanzhou 730000
| | - Haijun Wang
- Key Laboratory of Synthetic and Biological Colloids
- Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi 214122
| | - Senmiao Xu
- State Key Laboratory for Oxo Synthesis and Selective Oxidation
- Suzhou Research Institute
- Lanzhou Institute of Chemical Physics (LICP)
- Chinese Academy of Sciences
- Lanzhou 730000
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28
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Blair DJ, Zhong S, Hesse MJ, Zabaleta N, Myers EL, Aggarwal VK. Full chirality transfer in the synthesis of hindered tertiary boronic esters under in situ lithiation-borylation conditions. Chem Commun (Camb) 2016; 52:5289-92. [PMID: 27002235 DOI: 10.1039/c6cc00536e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Hindered tertiary neopentyl glycol boronic esters can be prepared by using in situ lithiation-borylation of enantiopure secondary benzylic carbamates at -20 °C with full chirality transfer.
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Affiliation(s)
- D J Blair
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK.
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29
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Iterative protecting group-free cross-coupling leading to chiral multiply arylated structures. Nat Commun 2016; 7:11065. [PMID: 27040494 PMCID: PMC4822017 DOI: 10.1038/ncomms11065] [Citation(s) in RCA: 89] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Accepted: 02/17/2016] [Indexed: 02/07/2023] Open
Abstract
The Suzuki–Miyaura cross-coupling is one of the most often utilized reactions in the synthesis of pharmaceutical compounds and conjugated materials. In its most common form, the reaction joins two sp2-functionalized carbon atoms to make a biaryl or diene/polyene unit. These substructures are widely found in natural products and small molecules and thus the Suzuki–Miyaura cross-coupling has been proposed as the key reaction for the automated assembly of such molecules, using protecting group chemistry to affect iterative coupling. We present herein, a significant advance in this approach, in which multiply functionalized cross-coupling partners can be employed in iterative coupling without the use of protecting groups. To accomplish this, the orthogonal reactivity of different boron substituents towards the boron-to-palladium transmetalation reaction is exploited. The approach is illustrated in the preparation of chiral enantioenriched compounds, which are known to be privileged structures in active pharmaceutical compounds. The Suzuki-Miyaura cross coupling is widely used in industrial and academic settings for the formation of carbon-carbon bonds. Here, the authors report a procedure whereby a molecule with multiple reactive carbon-boron bonds can undergo sequential, selective Suzuki-Miyaura reactions without the need for protecting groups.
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30
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Shoba VM, Thacker NC, Bochat AJ, Takacs JM. Synthesis of Chiral Tertiary Boronic Esters by Oxime-Directed Catalytic Asymmetric Hydroboration. Angew Chem Int Ed Engl 2016; 55:1465-9. [PMID: 26662460 PMCID: PMC4878850 DOI: 10.1002/anie.201509137] [Citation(s) in RCA: 81] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Indexed: 11/11/2022]
Abstract
Chiral boronic esters are useful intermediates in asymmetric synthesis. We have previously shown that carbonyl-directed catalytic asymmetric hydroboration (CAHB) is an efficient approach to the synthesis of functionalized primary and secondary chiral boronic esters. We now report that the oxime-directed CAHB of alkyl-substituted methylidene and trisubstituted alkene substrates by pinacolborane (pinBH) affords oxime-containing chiral tertiary boronic esters with yields up to 87% and enantiomeric ratios up to 96:4 e.r. The utility of the method is demonstrated by the formation of chiral diols and O-substituted hydroxylamines, the generation of quaternary carbon stereocenters through carbon-carbon coupling reactions, and the preparation of chiral 3,4,4-trisubstituted isoxazolines.
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Affiliation(s)
- Veronika M Shoba
- Department of Chemistry, University of Nebraska-Lincoln, 807 Hamilton Hall, Lincoln, NE, 68588-0304, USA
| | - Nathan C Thacker
- Department of Chemistry, University of Nebraska-Lincoln, 807 Hamilton Hall, Lincoln, NE, 68588-0304, USA
| | - Andrew J Bochat
- Department of Chemistry, University of Nebraska-Lincoln, 807 Hamilton Hall, Lincoln, NE, 68588-0304, USA
| | - James M Takacs
- Department of Chemistry, University of Nebraska-Lincoln, 807 Hamilton Hall, Lincoln, NE, 68588-0304, USA.
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31
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Huang ZD, Ding R, Wang P, Xu YH, Loh TP. Palladium-catalyzed silylation reaction between benzylic halides and silylboronate. Chem Commun (Camb) 2016; 52:5609-12. [DOI: 10.1039/c6cc00713a] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient Pd-catalyzed silylation reaction of benzylic halides with silylboronate is reported. In this reaction, primary and secondary benzylic halides could react well with silylboronates to afford benzylic silanes. This reaction accommodates a broad substrate scope and proceeds smoothly under very mild reaction conditions. The corresponding products could be obtained in moderate to high yields and with stereospecificity.
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Affiliation(s)
- Zhi-Dao Huang
- Department of Chemistry
- University of Science and Technology of China
- Hefei
- China
| | - Ran Ding
- Department of Chemistry
- University of Science and Technology of China
- Hefei
- China
| | - Peng Wang
- Department of Chemical Engineering and Technology
- Tianshui Normal University
- Tianshui
- China
| | - Yun-He Xu
- Department of Chemistry
- University of Science and Technology of China
- Hefei
- China
| | - Teck-Peng Loh
- Department of Chemistry
- University of Science and Technology of China
- Hefei
- China
- Division of Chemistry and Biological Chemistry
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32
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Yang Y, Szabó KJ. Synthesis of Allenes by Catalytic Coupling of Propargyl Carbonates with Aryl Iodides in the Presence of Diboron Species. J Org Chem 2015; 81:250-5. [DOI: 10.1021/acs.joc.5b01842] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Yuzhu Yang
- Department
of Organic Chemistry, Stockholm University, SE-10691 Stockholm, Sweden
| | - Kálmán J. Szabó
- Department
of Organic Chemistry, Stockholm University, SE-10691 Stockholm, Sweden
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33
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Shoba VM, Thacker NC, Bochat AJ, Takacs JM. Synthesis of Chiral Tertiary Boronic Esters by Oxime-Directed Catalytic Asymmetric Hydroboration. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201509137] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Veronika M. Shoba
- Department of Chemistry; University of Nebraska-Lincoln; 807 Hamilton Hall Lincoln NE 68588-0304 USA
| | - Nathan C. Thacker
- Department of Chemistry; University of Nebraska-Lincoln; 807 Hamilton Hall Lincoln NE 68588-0304 USA
| | - Andrew J. Bochat
- Department of Chemistry; University of Nebraska-Lincoln; 807 Hamilton Hall Lincoln NE 68588-0304 USA
| | - James M. Takacs
- Department of Chemistry; University of Nebraska-Lincoln; 807 Hamilton Hall Lincoln NE 68588-0304 USA
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34
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Yang CH, Zhang YS, Fan WW, Liu GQ, Li YM. Intramolecular Aminoboration of Unfunctionalized Olefins. Angew Chem Int Ed Engl 2015; 54:12636-9. [DOI: 10.1002/anie.201505489] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Revised: 08/04/2015] [Indexed: 11/10/2022]
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35
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Yang CH, Zhang YS, Fan WW, Liu GQ, Li YM. Intramolecular Aminoboration of Unfunctionalized Olefins. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201505489] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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36
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Lou Y, Cao P, Jia T, Zhang Y, Wang M, Liao J. Copper-Catalyzed Enantioselective 1,6-Boration ofpara-Quinone Methides and Efficient Transformation ofgem-Diarylmethine Boronates to Triarylmethanes. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201505926] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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37
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Lou Y, Cao P, Jia T, Zhang Y, Wang M, Liao J. Copper-Catalyzed Enantioselective 1,6-Boration ofpara-Quinone Methides and Efficient Transformation ofgem-Diarylmethine Boronates to Triarylmethanes. Angew Chem Int Ed Engl 2015; 54:12134-8. [DOI: 10.1002/anie.201505926] [Citation(s) in RCA: 229] [Impact Index Per Article: 25.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2015] [Revised: 07/27/2015] [Indexed: 12/14/2022]
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38
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Cherney AH, Kadunce NT, Reisman SE. Enantioselective and Enantiospecific Transition-Metal-Catalyzed Cross-Coupling Reactions of Organometallic Reagents To Construct C-C Bonds. Chem Rev 2015; 115:9587-652. [PMID: 26268813 PMCID: PMC4566132 DOI: 10.1021/acs.chemrev.5b00162] [Citation(s) in RCA: 615] [Impact Index Per Article: 68.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Alan H Cherney
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology , Pasadena, California 91125, United States
| | - Nathaniel T Kadunce
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology , Pasadena, California 91125, United States
| | - Sarah E Reisman
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology , Pasadena, California 91125, United States
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39
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Roesner S, Blair DJ, Aggarwal VK. Enantioselective installation of adjacent tertiary benzylic stereocentres using lithiation-borylation-protodeboronation methodology. Application to the synthesis of bifluranol and fluorohexestrol. Chem Sci 2015; 6:3718-3723. [PMID: 29218141 PMCID: PMC5707455 DOI: 10.1039/c4sc03901g] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2014] [Accepted: 04/11/2015] [Indexed: 12/14/2022] Open
Abstract
1,2-Diaryl ethanes bearing 1,2-stereogenic centres show interesting biological activity but their stereocontrolled synthesis has not been reported forcing a reliance of methods involving diastereomer and enantiomer separation. We have found that this class of molecules can be prepared with very high stereocontrol using lithiation-borylation methodology. The reaction of an enantioenriched benzylic lithiated carbamate with an enantioenriched benzylic secondary pinacol boronic ester gave a tertiary boronic ester with complete diastereo- and enantiocontrol. It was essential to use MgBr2/MeOH after formation of the boronate complex, both to promote the 1,2-migration and to trap any lithiated carbamate/benzylic anion that formed from fragmentation of the ate complex, anions that would otherwise racemise and re-form the boronate complex eroding both er and dr of the product. When the benzylic lithiated carbamate and benzylic secondary pinacol boronic ester were too hindered, boronate complex did not even form. In these cases, it was found that the use of the less hindered neopentyl boronic esters enabled successful homologation to take place even for the most hindered reaction partners, with high stereocontrol and without the need for additives. Protodeboronation of the product boronic esters with TBAF gave the target 1,2-diaryl ethanes bearing 1,2-stereogenic centres. The methodology was applied to the stereocontrolled synthesis of bifluranol and fluorohexestrol in just 7 and 5 steps, respectively.
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Affiliation(s)
- Stefan Roesner
- School of Chemistry , University of Bristol , Cantock's Close , Bristol , BS8 1TS , UK . ; ; Tel: +44 (0)117 954 6315
| | - Daniel J Blair
- School of Chemistry , University of Bristol , Cantock's Close , Bristol , BS8 1TS , UK . ; ; Tel: +44 (0)117 954 6315
| | - Varinder K Aggarwal
- School of Chemistry , University of Bristol , Cantock's Close , Bristol , BS8 1TS , UK . ; ; Tel: +44 (0)117 954 6315
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40
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Guo H, Chen X, Zhao C, He W. Suzuki-type cross coupling between aryl halides and silylboranes for the syntheses of aryl silanes. Chem Commun (Camb) 2015; 51:17410-2. [DOI: 10.1039/c5cc07071f] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A simple but efficient system with broad substrate scope was developed for the syntheses of aryl silanes.
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Affiliation(s)
- Huifang Guo
- School of Medicine and Tsinghua-Peking Joint Centers for Life Science
- Tsinghua University
- Beijing 100084
- China
| | - Xiao Chen
- School of Medicine and Tsinghua-Peking Joint Centers for Life Science
- Tsinghua University
- Beijing 100084
- China
| | - Chunliang Zhao
- School of Medicine and Tsinghua-Peking Joint Centers for Life Science
- Tsinghua University
- Beijing 100084
- China
| | - Wei He
- School of Medicine and Tsinghua-Peking Joint Centers for Life Science
- Tsinghua University
- Beijing 100084
- China
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41
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42
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Huang L, Wang J, Wei X, Wei H. Does a multiply bonded oxo ligand directly participate in B–H bond activation by a high-valent di-oxo-molybdenum(vi) complex? A density functional theory study. Catal Sci Technol 2015. [DOI: 10.1039/c5cy00177c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The multiply bonded oxo ligand does not participate in the activation of the B–H bond with organic substrates of amides, amines, and nitriles by the high-valent oxo-molybdenum complex MoO2Cl2.
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Affiliation(s)
- Liangfang Huang
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials
- Jiangsu Provincial Key Laboratory for NSLSCS
- College of Chemistry and Materials Science
- Nanjing Normal University
- Nanjing
| | - Jiandi Wang
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials
- Jiangsu Provincial Key Laboratory for NSLSCS
- College of Chemistry and Materials Science
- Nanjing Normal University
- Nanjing
| | - Xiaoqin Wei
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials
- Jiangsu Provincial Key Laboratory for NSLSCS
- College of Chemistry and Materials Science
- Nanjing Normal University
- Nanjing
| | - Haiyan Wei
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials
- Jiangsu Provincial Key Laboratory for NSLSCS
- College of Chemistry and Materials Science
- Nanjing Normal University
- Nanjing
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43
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Leonori D, Aggarwal VK. Stereospezifische Kupplungen von sekundären und tertiären Boronsäureestern. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201407701] [Citation(s) in RCA: 88] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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44
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Leonori D, Aggarwal VK. Stereospecific couplings of secondary and tertiary boronic esters. Angew Chem Int Ed Engl 2014; 54:1082-96. [PMID: 25414056 DOI: 10.1002/anie.201407701] [Citation(s) in RCA: 247] [Impact Index Per Article: 24.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2014] [Indexed: 12/15/2022]
Abstract
This Minireview highlights advances in the Suzuki-Miyaura cross-coupling of secondary boron reagents for the creation of C-C bonds with control of stereochemistry. It also includes non-transition-metal coupling of secondary and tertiary boronic esters to electron-rich aromatics.
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Affiliation(s)
- Daniele Leonori
- School of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL (UK).
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45
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Egi M, Shimizu K, Kamiya M, Ota Y, Akai S. Central-axial-central chirality transfer: asymmetric synthesis of highly substituted indenes bearing a stereogenic quaternary carbon center from optically active propargyl alcohols. Chem Commun (Camb) 2014; 51:380-3. [PMID: 25407248 DOI: 10.1039/c4cc08034c] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An asymmetric synthesis of highly substituted indenes 3, bearing a quaternary stereogenic carbon center, has been developed via the central-axial-central chirality transfer from optically active propargyl alcohols 1. This transformation involves the addition/rearrangement of 1 and ynamides 2 to give tetra-substituted allenes 4 and further cyclization of 4.
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Affiliation(s)
- Masahiro Egi
- School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka, 422-8526, Japan.
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46
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Miyamura S, Araki M, Suzuki T, Yamaguchi J, Itami K. Stereodivergent Synthesis of Arylcyclopropylamines by Sequential CH Borylation and Suzuki-Miyaura Coupling. Angew Chem Int Ed Engl 2014; 54:846-51. [DOI: 10.1002/anie.201409186] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Indexed: 11/11/2022]
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47
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Miyamura S, Araki M, Suzuki T, Yamaguchi J, Itami K. Stereodivergent Synthesis of Arylcyclopropylamines by Sequential CH Borylation and Suzuki-Miyaura Coupling. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201409186] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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48
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Nagao K, Ohmiya H, Sawamura M. Phosphine-Catalyzed Anti-Carboboration of Alkynoates with Alkyl-, Alkenyl-, and Arylboranes. J Am Chem Soc 2014; 136:10605-8. [DOI: 10.1021/ja506310v] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Kazunori Nagao
- Department of Chemistry,
Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Hirohisa Ohmiya
- Department of Chemistry,
Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Masaya Sawamura
- Department of Chemistry,
Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
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49
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Zhu C, Falck JR. Transition-Metal-Free ipso-Functionalization of Arylboronic Acids and Derivatives. Adv Synth Catal 2014; 356:2395-2410. [PMID: 25414624 DOI: 10.1002/adsc.201400305] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Arylboronic acids and their derivatives have been widely exploited as important synthetic precursors in organic synthesis, materials science, and pharmaceutical development. In addition to numerous applications in transition-metal-mediated cross-coupling reactions, transition-metal-free transformations involving arylboronic acids and derivatives have recently received a surge of attention for converting the C-B bond to C-C, C-N, C-O, and many other C-X bonds. Consequently, a wide range of useful compounds, e.g., phenols, anilines, nitroarenes, and haloarenes, have been readily synthesized. Amongst these efforts, many versatile reagents have been developed and a lot of practical approaches demonstrated. The research in this promising field is summarized in the current review and organized on the basis of the type of bonds being formed.
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Affiliation(s)
- Chen Zhu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Ren-Ai Road, Suzhou, Jiangsu 215123, P. R. China
| | - John R Falck
- Department of Biochemistry, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX 75390-9038 (USA)
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50
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Enantiospecific sp(2)-sp(3) coupling of secondary and tertiary boronic esters. Nat Chem 2014; 6:584-9. [PMID: 24950327 DOI: 10.1038/nchem.1971] [Citation(s) in RCA: 308] [Impact Index Per Article: 30.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Accepted: 04/30/2014] [Indexed: 12/22/2022]
Abstract
The cross-coupling of boronic acids and related derivatives with sp(2) electrophiles (the Suzuki-Miyaura reaction) is one of the most powerful C-C bond formation reactions in synthesis, with applications that span pharmaceuticals, agrochemicals and high-tech materials. Despite the breadth of its utility, the scope of this Nobel prize-winning reaction is rather limited when applied to aliphatic boronic esters. Primary organoboron reagents work well, but secondary and tertiary boronic esters do not (apart from a few specific and isolated examples). Through an alternative strategy, which does not involve using transition metals, we have discovered that enantioenriched secondary and tertiary boronic esters can be coupled to electron-rich aromatics with essentially complete enantiospecificity. As the enantioenriched boronic esters are easily accessible, this reaction should find considerable application, particularly in the pharmaceutical industry where there is growing awareness of the importance of, and greater clinical success in, creating biomolecules with three-dimensional architectures.
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