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Park D, Baek D, Lee CW, Ryu H, Park S, Han W, Hong S. Enantioselective C(sp2)–H borylation of diarylmethylsilanes catalyzed by chiral pyridine-dihydroisoquinoline iridium complexes. Tetrahedron 2021. [DOI: 10.1016/j.tet.2020.131811] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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52
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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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Palladium-mediated Suzuki-Miyaura Cross-Coupling Reaction of Potassium Boc-protected aminomethyltrifluoroborate with DNA-Conjugated aryl bromides for DNA-Encoded chemical library synthesis. Biochem Biophys Res Commun 2020; 533:209-214. [DOI: 10.1016/j.bbrc.2020.04.027] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Revised: 03/05/2020] [Accepted: 04/06/2020] [Indexed: 12/12/2022]
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Yao SY, Cao ML, Zhang XL. Photoaccelerated energy transfer catalysis of the Suzuki-Miyaura coupling through ligand regulation on Ir(iii)-Pd(ii) bimetallic complexes. RSC Adv 2020; 10:42874-42882. [PMID: 35514913 PMCID: PMC9058252 DOI: 10.1039/d0ra08547b] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Accepted: 11/16/2020] [Indexed: 01/10/2023] Open
Abstract
Three bimetallic Ir(iii)-Pd(ii) complexes [Ir(ppy)2(bpm)PdCl2](PF6) (ppy = 2-phenylpyridine, 1), [Ir(dfppy)2(bpm)PdCl2](PF6) (dfppy = (4,6-difluorophenyl)pyridine, 2), and [Ir(pq)2(bpm)PdCl2](PF6) (pq = 2-phenylquinoline, 3) were synthesized by using 2,2'-bipyrimidine (bpm) as a bridging ligand. The influences of the cyclometalated ligand at the Ir(iii) center on the photophysical and electrochemical properties as well as photocatalytic activity for the Suzuki-Miyaura coupling reaction under mild conditions were evaluated. The results revealed that complex 3 enables dramatically accelerating the Suzuki-Miyaura coupling reaction under visible light irradiation at room temperature, due to the effective absorption of visible light and appropriate locus of the excited chromophore. Mechanism studies showed that the chromophore [Ir(pq)2(bpm)] fragment absorbs visible light to produce the triplet excited state centering on the bridging ligand which boosts the formation of electron rich Pd(ii) units and facilitates the oxidative addition step of the catalytic cycle. Simultaneously, the excited chromophore undergoes energy transfer efficiently to the Pd(ii) reaction site to form the excited Pd(ii) species, resulting in enhancement of Pd(ii) reduction steps of the Suzuki-Miyaura coupling reaction and increasing the reactivity of the catalyst. This provides a new strategy for designing photocatalysts for coupling reaction through altering the cyclometalated ligand to modulate the photophysical properties and the cooperation between two metal units.
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Affiliation(s)
- Su-Yang Yao
- Department of Chemistry, Guangdong University of Education Guangzhou 510303 China
| | - Man-Li Cao
- Department of Chemistry, Guangdong University of Education Guangzhou 510303 China
| | - Xiu-Lian Zhang
- Department of Chemistry, Guangdong University of Education Guangzhou 510303 China
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55
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Jiang SP, Dong XY, Gu QS, Ye L, Li ZL, Liu XY. Copper-Catalyzed Enantioconvergent Radical Suzuki-Miyaura C(sp 3)-C(sp 2) Cross-Coupling. J Am Chem Soc 2020; 142:19652-19659. [PMID: 33146993 DOI: 10.1021/jacs.0c09125] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A copper-catalyzed enantioconvergent Suzuki-Miyaura C(sp3)-C(sp2) cross-coupling of various racemic alkyl halides with organoboronate esters has been established in high enantioselectivity. Critical to the success is the use of a chiral cinchona alkaloid-derived N,N,P-ligand for not only enhancing the reducing capability of copper catalyst to favor a stereoablative radical pathway over a stereospecific SN2-type process but also providing an ideal chiral environment to achieve the challenging enantiocontrol over the highly reactive radical species. The reaction has a broad scope with respect to both coupling partners, covering aryl- and heteroarylboronate esters, as well as benzyl-, heterobenzyl-, and propargyl bromides and chlorides with good functional group compatibility. Thus, it provides expedient access toward a range of useful enantioenriched skeletons featuring chiral tertiary benzylic stereocenters.
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Affiliation(s)
- Sheng-Peng Jiang
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, China
| | - Xiao-Yang Dong
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, China
| | - Qiang-Shuai Gu
- Academy for Advanced Interdisciplinary Studies and Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
| | - Liu Ye
- Academy for Advanced Interdisciplinary Studies and Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
| | - Zhong-Liang Li
- Academy for Advanced Interdisciplinary Studies and Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
| | - Xin-Yuan Liu
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, China
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56
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Yoshinaga Y, Yamamoto T, Suginome M. Enantioconvergent Cu-Catalyzed Intramolecular C-C Coupling at Boron-Bound C(sp 3) Atoms of α-Aminoalkylboronates Using a C1-Symmetrical 2,2'-Bipyridyl Ligand Attached to a Helically Chiral Macromolecular Scaffold. J Am Chem Soc 2020; 142:18317-18323. [PMID: 33063989 DOI: 10.1021/jacs.0c09080] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Enantioconvergent intramolecular coupling of α-(2-bromobenzoylamino)benzylboronic esters was achieved using a copper catalyst having helically chiral macromolecular bipyridyl ligand, PQXbpy. Racemic α-(2-bromobenzoylamino)benzylboronic esters were converted into (R)-configured 3-arylisoindolinones with high enantiopurity using right-handed helical PQXbpy as a chiral ligand in a toluene/CHCl3 mixed solvent. When enantiopure (R)- and (S)-configured boronates were separately reacted under the same reaction conditions, both afforded (R)-configured products through formal stereoinvertive and stereoretentive processes, respectively. From these results, a mechanism involving deracemization of organocopper intermediates in the presence of PQXbpy is assumed. PQXbpy switched its helical sense to left-handed when a toluene/1,1,2-trichloroethane mixed solvent was used, resulting in the formation of the corresponding (S)-products from the racemic starting material.
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Affiliation(s)
- Yukako Yoshinaga
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Takeshi Yamamoto
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Michinori Suginome
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
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57
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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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58
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Kleban I, Krokhmaliuk Y, Reut S, Shuvakin S, Pendyukh VV, Khyzhan OI, Yarmoliuk DS, Tymtsunik AV, Rassukana YV, Grygorenko OO. Multigram Synthesis of Heterabicyclo[n.1.0]alkan‐1‐yl Trifluoroborates. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000977] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Ihor Kleban
- Enamine Ltd. Chervonotkatska 78 02094 Kyiv Ukraine
- Institute of Organic Chemistry National Academy of Sciences of Ukraine Murmanska Street 5 02094 Kyiv Ukraine
| | - Yevhen Krokhmaliuk
- Enamine Ltd. Chervonotkatska 78 02094 Kyiv Ukraine
- Taras Shevchenko National University of Kyiv Volodymyrska Street 60 01601 Kyiv Ukraine
| | - Sofiia Reut
- Enamine Ltd. Chervonotkatska 78 02094 Kyiv Ukraine
- Taras Shevchenko National University of Kyiv Volodymyrska Street 60 01601 Kyiv Ukraine
| | - Serhii Shuvakin
- Enamine Ltd. Chervonotkatska 78 02094 Kyiv Ukraine
- Taras Shevchenko National University of Kyiv Volodymyrska Street 60 01601 Kyiv Ukraine
| | | | | | | | - Andriy V. Tymtsunik
- Enamine Ltd. Chervonotkatska 78 02094 Kyiv Ukraine
- National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute” Prospect Peremogy 37 03056 Kyiv Ukraine
| | - Yuliya V. Rassukana
- Institute of Organic Chemistry National Academy of Sciences of Ukraine Murmanska Street 5 02094 Kyiv Ukraine
- National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute” Prospect Peremogy 37 03056 Kyiv Ukraine
| | - Oleksandr O. Grygorenko
- Enamine Ltd. Chervonotkatska 78 02094 Kyiv Ukraine
- Taras Shevchenko National University of Kyiv Volodymyrska Street 60 01601 Kyiv Ukraine
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59
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Affiliation(s)
- Xiangyu Li
- Department of Chemistry University of Alberta Edmonton AB T6G 2G2 Canada
| | - Dennis G. Hall
- Department of Chemistry University of Alberta Edmonton AB T6G 2G2 Canada
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60
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Takeda Y, Sameera WMC, Minakata S. Palladium-Catalyzed Regioselective and Stereospecific Ring-Opening Cross-Coupling of Aziridines: Experimental and Computational Studies. Acc Chem Res 2020; 53:1686-1702. [PMID: 32786337 DOI: 10.1021/acs.accounts.0c00395] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Aziridines, i.e., the smallest saturated N-heterocycles, serve as useful building blocks in synthetic organic chemistry. Because of the release of the large ring strain energy accommodated in the small ring, (ca. 27 kcal/mol), aziridines undergo ring-opening reactions with a variety of nucleophiles. Therefore, among the synthetic reactions utilizing aziridines, regioselective ring-opening substitutions of aziridines with nucleophiles, such as heteroatomic nucleophiles (e.g., amines, alcohols, and thiols) and carbonaceous nucleophiles (e.g., carbanions, organometallic reagents, and electron-rich arenes), constitute a useful synthetic methodology to synthesize biologically relevant β-functionalized alkylamines. However, the regioselection in such traditional ring-opening substitutions of aziridines is highly dependent on the substrate combination, and stereochemical control is challenging to achieve, especially in the case of Lewis acid-promoted variants. Therefore, the development of robust catalytic ring-opening functionalization methods that enable precise prediction of regioselectivity and stereochemistry is desirable. In this direction, our group focused on the highly regioselective and stereospecific nature of the stoichiometric oxidative addition elementary step of 2-substituted aziridines into Pd(0) complexes in an SN2 fashion. In conjunction with the recent advancements in transition-metal-catalyzed cross-coupling reactions of alkyl pseudohalides containing a C(sp3)-Q (Q = O, N, S, etc.) bond, aziridines can be used as nonclassical alkyl pseudohalides in regioselective and stereospecific cross-couplings.In this Account, starting from the background of transition-metal-catalyzed ring-opening functionalization of aziridines, our contributions to the palladium-catalyzed regioselective and stereoinvertive cross-couplings of aziridines with organoboron reagents to form C(sp3)-C, C(sp3)-B, and C(sp3)-Si bonds have been compiled. The developed methods allow the syntheses of medicinally important amine compounds, e.g., enantioenriched β-phenethylamines, β-amino acids, and their boron and silyl surrogates, from readily available enantiopure aziridine substrates. Notably, the regioselectivity of the ring opening can be switched by appropriate selection of the catalyst (i.e., Pd/NHC vs Pd/PR3 systems). Computational studies rationalized the detailed mechanisms of the full catalytic cycle and the regioselectivity and stereospecificity of the reactions. The computational results suggested that the interactions operating between the Pd catalyst and aziridine substrate play important roles in determining the regioselection of the aziridine ring-opening event (i.e., oxidative addition). Also, the computational results rationalized the role of water molecules in promoting the transmetalation step through the formation of a Pd-hydroxide active intermediate. This Account evidences the benefits of synergistic collaborations between experimental and computational methods in developing novel transition-metal-catalyzed cross-coupling reactions.
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Affiliation(s)
- Youhei Takeda
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Yamadaoka 2-1, Suita, Osaka 565-0871, Japan
| | - W. M. C. Sameera
- Institute of Low Temperature Science, Hokkaido University, Kita-ku, North 19 West 8, Sapporo, Hokkaido 060-0819, Japan
| | - Satoshi Minakata
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Yamadaoka 2-1, Suita, Osaka 565-0871, Japan
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61
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Wu C, Zhao C, Zhou J, Hu HS, Li J, Wu P, Chen C. Wet carbonate-promoted radical arylation of vinyl pinacolboronates with diaryliodonium salts yields substituted olefins. Commun Chem 2020; 3:92. [PMID: 36703314 PMCID: PMC9814134 DOI: 10.1038/s42004-020-00343-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Accepted: 06/22/2020] [Indexed: 01/29/2023] Open
Abstract
Since the landmark work of Heck, Negishi and Suzuki on Pd-catalyzed crossing coupling reactions, innovative discovery of new reactions forming C-C bonds and constructing functional olefins via nonmetal catalysts remains an imperative area in organic chemistry. Herein, we report a transition-metal-free arylation method of vinyl pinacolboronates with diaryliodonium salts to form C(sp2)-C(sp2) bond and provide trans-arylvinylboronates. The resulting vinylboronates can further react with the remaining aryl iodides (generated from diaryliodonium salts) via Suzuki coupling to afford functional olefins, offering an efficient use of aryliodonium salts. Computational mechanistic studies suggest radical-pair pathway of the diaryliodonium salts promoted by the multi-functional wet carbonate.
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Affiliation(s)
- Chao Wu
- grid.12527.330000 0001 0662 3178Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education), Department of Chemistry, and the Graduate School at Shenzhen, Tsinghua University, 100084 Beijing, China
| | - Chongyang Zhao
- grid.12527.330000 0001 0662 3178Department of Chemistry & Key Laboratory of Organic Optoelectronics and Molecular Engineering of Ministry of Education, Tsinghua University, 100084 Beijing, China
| | - Jun Zhou
- grid.500400.10000 0001 2375 7370Environmental Engineering, Wuyi University, Jiangmen, 529000 China ,International Healthcare Innovation Institute (Jiangmen), Jiangmen, 529000 China
| | - Han-Shi Hu
- grid.12527.330000 0001 0662 3178Department of Chemistry & Key Laboratory of Organic Optoelectronics and Molecular Engineering of Ministry of Education, Tsinghua University, 100084 Beijing, China
| | - Jun Li
- grid.12527.330000 0001 0662 3178Department of Chemistry & Key Laboratory of Organic Optoelectronics and Molecular Engineering of Ministry of Education, Tsinghua University, 100084 Beijing, China
| | - Panpan Wu
- grid.500400.10000 0001 2375 7370Environmental Engineering, Wuyi University, Jiangmen, 529000 China ,International Healthcare Innovation Institute (Jiangmen), Jiangmen, 529000 China
| | - Chao Chen
- grid.12527.330000 0001 0662 3178Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education), Department of Chemistry, and the Graduate School at Shenzhen, Tsinghua University, 100084 Beijing, China ,grid.500400.10000 0001 2375 7370Environmental Engineering, Wuyi University, Jiangmen, 529000 China ,International Healthcare Innovation Institute (Jiangmen), Jiangmen, 529000 China
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62
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An L, Tong FF, Zhang S, Zhang X. Stereoselective Functionalization of Racemic Cyclopropylzinc Reagents via Enantiodivergent Relay Coupling. J Am Chem Soc 2020; 142:11884-11892. [PMID: 32530615 DOI: 10.1021/jacs.0c04462] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Lun An
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Fei-Fei Tong
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Shu Zhang
- School of Materials and Energy, University of Electronic Science and Technology of China, 2006 Xiyuan Avenue, West High-Tech Zone, Chengdu, Sichuan 611731, China
| | - Xingang Zhang
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
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63
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Dendritic effect for immobilized pyridylphenylene dendrons in hosting catalytic Pd species: Positive or negative? REACT FUNCT POLYM 2020. [DOI: 10.1016/j.reactfunctpolym.2020.104582] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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64
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Kondo H, Miyamura S, Matsushita K, Kato H, Kobayashi C, Arifin, Itami K, Yokogawa D, Yamaguchi J. σ-Bond Hydroboration of Cyclopropanes. J Am Chem Soc 2020; 142:11306-11313. [DOI: 10.1021/jacs.0c05213] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Hiroki Kondo
- Institute of Transformative Bio-Molecules (WPI-ITbM) and Graduate School of Science, Nagoya University, Nagoya 464-8602, Japan
| | - Shin Miyamura
- Institute of Transformative Bio-Molecules (WPI-ITbM) and Graduate School of Science, Nagoya University, Nagoya 464-8602, Japan
| | - Kaoru Matsushita
- Department of Applied Chemistry, Waseda University, Tokyo 169-0072, Japan
| | - Hiroki Kato
- Department of Applied Chemistry, Waseda University, Tokyo 169-0072, Japan
| | - Chisa Kobayashi
- Institute of Transformative Bio-Molecules (WPI-ITbM) and Graduate School of Science, Nagoya University, Nagoya 464-8602, Japan
| | - Arifin
- Institute of Transformative Bio-Molecules (WPI-ITbM) and Graduate School of Science, Nagoya University, Nagoya 464-8602, Japan
| | - Kenichiro Itami
- Institute of Transformative Bio-Molecules (WPI-ITbM) and Graduate School of Science, Nagoya University, Nagoya 464-8602, Japan
| | - Daisuke Yokogawa
- Institute of Transformative Bio-Molecules (WPI-ITbM) and Graduate School of Science, Nagoya University, Nagoya 464-8602, Japan
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65
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Yoshinaga Y, Yamamoto T, Suginome M. Stereoinvertive C–C Bond Formation at the Boron‐Bound Stereogenic Centers through Copper‐Bipyridine‐Catalyzed Intramolecular Coupling of α‐Aminobenzylboronic Esters. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201914864] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Yukako Yoshinaga
- Department of Synthetic Chemistry and Biological Chemistry Graduate School of Engineering Kyoto University, Katsura, Nishikyo-ku Kyoto 615-8510 Japan
| | - Takeshi Yamamoto
- Department of Synthetic Chemistry and Biological Chemistry Graduate School of Engineering Kyoto University, Katsura, Nishikyo-ku Kyoto 615-8510 Japan
| | - Michinori Suginome
- Department of Synthetic Chemistry and Biological Chemistry Graduate School of Engineering Kyoto University, Katsura, Nishikyo-ku Kyoto 615-8510 Japan
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66
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Uzelac M, Yuan K, Ingleson MJ. A Comparison of Two Zinc Hydride Catalysts for Terminal Alkyne C–H Borylation/Hydroboration and the Formation of 1,1,1-Triborylalkanes by Tandem Catalysis Using Zn–H and B–H Compounds. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00086] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Marina Uzelac
- EastCHEM School of Chemistry, University of Edinburgh, Edinburgh EH9 3FJ, United Kingdom
| | - Kang Yuan
- EastCHEM School of Chemistry, University of Edinburgh, Edinburgh EH9 3FJ, United Kingdom
| | - Michael J. Ingleson
- EastCHEM School of Chemistry, University of Edinburgh, Edinburgh EH9 3FJ, United Kingdom
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67
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Dindarloo Inaloo I, Majnooni S, Eslahi H, Esmaeilpour M. Nickel(II) Nanoparticles Immobilized on EDTA-Modified Fe 3O 4@SiO 2 Nanospheres as Efficient and Recyclable Catalysts for Ligand-Free Suzuki-Miyaura Coupling of Aryl Carbamates and Sulfamates. ACS OMEGA 2020; 5:7406-7417. [PMID: 32280882 PMCID: PMC7144170 DOI: 10.1021/acsomega.9b04450] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2019] [Accepted: 03/16/2020] [Indexed: 05/09/2023]
Abstract
A highly efficient and air-, thermal-, and moisture-stable nickel-based catalyst with excellent magnetic properties supported on silica-coated magnetic Fe3O4 nanoparticles was successfully synthesized. It was well characterized by Fourier transform infrared spectroscopy, powder X-ray diffraction, transmission electron microscopy, field emission scanning electron microscopy, thermogravimetric analysis, dynamic light scattering (DLS), X-ray photoelectron spectroscopy, vibration sample magnetometry, energy-dispersive X-ray analysis, inductively coupled plasma analysis, and nitrogen adsorption-desorption isotherm analysis. The Suzuki-Miyaura coupling reaction between aryl carbamates and/or sulfamates with arylboronic acids was selected to demonstrate the catalytic activity and efficiency of the as-prepared magnetic nanocatalyst. Using the mentioned heterogeneous nanocatalyst in such reactions generated corresponding products in good to excellent yields in which the catalyst could easily be recovered from the reaction mixture with an external magnetic field to reuse directly for the next several cycles without significant loss of its activity.
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Affiliation(s)
- Iman Dindarloo Inaloo
- Chemistry
Department, College of Sciences, Shiraz
University, Shiraz 71946 84795, Iran
| | - Sahar Majnooni
- Department
of Chemistry, University of Isfahan, Isfahan 81746-73441, Iran
| | - Hassan Eslahi
- Chemistry
Department, College of Sciences, Shiraz
University, Shiraz 71946 84795, Iran
| | - Mohsen Esmaeilpour
- Chemistry
Department, College of Sciences, Shiraz
University, Shiraz 71946 84795, Iran
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68
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Oxtoby LJ, Li Z, Tran VT, Erbay TG, Deng R, Liu P, Engle KM. A Transient‐Directing‐Group Strategy Enables Enantioselective Reductive Heck Hydroarylation of Alkenes. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202001069] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Lucas J. Oxtoby
- Department of Chemistry The Scripps Research Institute 10550 North Torrey Pines Road La Jolla CA 92037 USA
| | - Zi‐Qi Li
- Department of Chemistry The Scripps Research Institute 10550 North Torrey Pines Road La Jolla CA 92037 USA
| | - Van T. Tran
- Department of Chemistry The Scripps Research Institute 10550 North Torrey Pines Road La Jolla CA 92037 USA
| | - Tuğçe G. Erbay
- Department of Chemistry University of Pittsburgh Pittsburgh PA 15260 USA
| | - Ruohan Deng
- Department of Chemistry The Scripps Research Institute 10550 North Torrey Pines Road La Jolla CA 92037 USA
| | - Peng Liu
- Department of Chemistry University of Pittsburgh Pittsburgh PA 15260 USA
| | - Keary M. Engle
- Department of Chemistry The Scripps Research Institute 10550 North Torrey Pines Road La Jolla CA 92037 USA
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69
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Oxtoby LJ, Li ZQ, Tran VT, Erbay TG, Deng R, Liu P, Engle KM. A Transient-Directing-Group Strategy Enables Enantioselective Reductive Heck Hydroarylation of Alkenes. Angew Chem Int Ed Engl 2020; 59:8885-8890. [PMID: 32196876 DOI: 10.1002/anie.202001069] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 03/20/2020] [Indexed: 01/28/2023]
Abstract
Metal-coordinating directing groups have seen extensive use in the field of transition-metal-catalyzed alkene functionalization; however, their waste-generating installation and removal steps limit the efficiency and practicality of reactions that rely on their use. Inspired by developments in asymmetric organocatalysis, where reactions rely on reversible covalent interactions between an organic substrate and a chiral mediator, we have developed a transient-directing-group approach to reductive Heck hydroarylation of alkenyl benzaldehyde substrates that proceeds under mild conditions. Highly stereoselective migratory insertion is facilitated by in situ formation of an imine from catalytic amounts of a commercially available amino acid additive. Computational studies reveal an unusual mode of enantioinduction by the remote chiral center in the transient directing group.
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Affiliation(s)
- Lucas J Oxtoby
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, 92037, USA
| | - Zi-Qi Li
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, 92037, USA
| | - Van T Tran
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, 92037, USA
| | - Tuğçe G Erbay
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA, 15260, USA
| | - Ruohan Deng
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, 92037, USA
| | - Peng Liu
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA, 15260, USA
| | - Keary M Engle
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, 92037, USA
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70
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Herrera-Luna JC, Sampedro D, Jiménez MC, Pérez-Ruiz R. Rapid Access to Borylated Thiophenes Enabled by Visible Light. Org Lett 2020; 22:3273-3278. [DOI: 10.1021/acs.orglett.0c01076] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Jorge C. Herrera-Luna
- Departamento de Química, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain
| | - Diego Sampedro
- Departamento de Química, Centro de Investigación en Síntesis Química (CISQ), Universidad de La Rioja, Madre de Dios, 53, 26006 Logroño, Spain
| | - M. Consuelo Jiménez
- Departamento de Química, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain
| | - Raúl Pérez-Ruiz
- Departamento de Química, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain
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71
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Crockett MP, Wong AS, Li B, Byers JA. Rational Design of an Iron‐Based Catalyst for Suzuki–Miyaura Cross‐Couplings Involving Heteroaromatic Boronic Esters and Tertiary Alkyl Electrophiles. Angew Chem Int Ed Engl 2020; 59:5392-5397. [DOI: 10.1002/anie.201914315] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2019] [Indexed: 12/17/2022]
Affiliation(s)
- Michael P. Crockett
- Department of ChemistryBoston College Merkert Chemistry Center, 2609 Beacon St. Chestnut Hill MA 02467 USA
| | - Alexander S. Wong
- Department of ChemistryBoston College Merkert Chemistry Center, 2609 Beacon St. Chestnut Hill MA 02467 USA
| | - Bo Li
- Department of ChemistryBoston College Merkert Chemistry Center, 2609 Beacon St. Chestnut Hill MA 02467 USA
| | - Jeffery A. Byers
- Department of ChemistryBoston College Merkert Chemistry Center, 2609 Beacon St. Chestnut Hill MA 02467 USA
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72
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Yoshinaga Y, Yamamoto T, Suginome M. Stereoinvertive C–C Bond Formation at the Boron‐Bound Stereogenic Centers through Copper‐Bipyridine‐Catalyzed Intramolecular Coupling of α‐Aminobenzylboronic Esters. Angew Chem Int Ed Engl 2020; 59:7251-7255. [DOI: 10.1002/anie.201914864] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 01/24/2020] [Indexed: 11/09/2022]
Affiliation(s)
- Yukako Yoshinaga
- Department of Synthetic Chemistry and Biological Chemistry Graduate School of Engineering Kyoto University, Katsura, Nishikyo-ku Kyoto 615-8510 Japan
| | - Takeshi Yamamoto
- Department of Synthetic Chemistry and Biological Chemistry Graduate School of Engineering Kyoto University, Katsura, Nishikyo-ku Kyoto 615-8510 Japan
| | - Michinori Suginome
- Department of Synthetic Chemistry and Biological Chemistry Graduate School of Engineering Kyoto University, Katsura, Nishikyo-ku Kyoto 615-8510 Japan
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73
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Shin M, Kim M, Hwang C, Lee H, Kwon H, Park J, Lee E, Cho SH. Facile Synthesis of α-Boryl-Substituted Allylboronate Esters Using Stable Bis[(pinacolato)boryl]methylzinc Reagents. Org Lett 2020; 22:2476-2480. [DOI: 10.1021/acs.orglett.0c00721] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Minkyeong Shin
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Rep. of Korea
| | - Minjae Kim
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Rep. of Korea
| | - Chiwon Hwang
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Rep. of Korea
| | - Hyojae Lee
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Rep. of Korea
| | - Hyunchul Kwon
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Rep. of Korea
| | - Jinyoung Park
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Rep. of Korea
| | - Eunsung Lee
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Rep. of Korea
| | - Seung Hwan Cho
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Rep. of Korea
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74
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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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75
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Zhang C, Li Z, Fang Y, Jiang S, Wang M, Zhang G. MnO2 mediated sequential oxidation/olefination of alkyl-substituted heteroarenes with alcohols. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.130968] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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76
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Crockett MP, Wong AS, Li B, Byers JA. Rational Design of an Iron‐Based Catalyst for Suzuki–Miyaura Cross‐Couplings Involving Heteroaromatic Boronic Esters and Tertiary Alkyl Electrophiles. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201914315] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Michael P. Crockett
- Department of ChemistryBoston College Merkert Chemistry Center, 2609 Beacon St. Chestnut Hill MA 02467 USA
| | - Alexander S. Wong
- Department of ChemistryBoston College Merkert Chemistry Center, 2609 Beacon St. Chestnut Hill MA 02467 USA
| | - Bo Li
- Department of ChemistryBoston College Merkert Chemistry Center, 2609 Beacon St. Chestnut Hill MA 02467 USA
| | - Jeffery A. Byers
- Department of ChemistryBoston College Merkert Chemistry Center, 2609 Beacon St. Chestnut Hill MA 02467 USA
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77
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A unified approach for divergent synthesis of contiguous stereodiads employing a small boronyl group. Nat Commun 2020; 11:792. [PMID: 32034155 PMCID: PMC7005891 DOI: 10.1038/s41467-020-14592-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2019] [Accepted: 01/13/2020] [Indexed: 11/29/2022] Open
Abstract
Acyclic contiguous stereocenters are frequently seen in biologically active natural and synthetic molecules. Although various synthetic methods have been reported, predictable and unified approaches to all possible stereoisomers are rare, particularly for those containing non-reactive hydrocarbon substituents. Herein, a β-boronyl group is employed as a readily accessible handle for predictable α-functionalization of enolates with either syn or anti selectivity depending on reaction conditions. Contiguous tertiary-tertiary and tertiary-quaternary stereocenters are thus accessed in generally good yields and diastereoselectivity. Based on experimental and computational studies, mechanism for syn selective alkylation is proposed, and Bpin (pinacolatoboronyl) behaves as a smaller group than most carbon-centered groups. The synthetic utility of this methodology is demonstrated by preparation of several key intermediates for bioactive molecules. Predictable and unified approaches to all possible stereoisomers of acyclic compounds with contiguous stereocentres are rare. Here, the authors disclose a divergent α-functionalization of enolates with either syn or anti selectivity employing a β-boronyl group as a small, directing handle.
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78
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A Boron Activating Effect Enables Cobalt-Catalyzed Asymmetric Hydrogenation of Sterically Hindered Alkenes. J Am Chem Soc 2020; 142:3923-3930. [DOI: 10.1021/jacs.9b12214] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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79
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Sau SC, Hota PK, Mandal SK, Soleilhavoup M, Bertrand G. Stable abnormal N-heterocyclic carbenes and their applications. Chem Soc Rev 2020; 49:1233-1252. [PMID: 31998907 DOI: 10.1039/c9cs00866g] [Citation(s) in RCA: 159] [Impact Index Per Article: 39.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Although N-heterocyclic carbenes (NHCs) have been known as ligands for organometallic complexes since the 1960s, these carbenes did not attract considerable attention until Arduengo et al. reported the isolation of a metal-free imidazol-2-ylidene in 1991. In 2001 Crabtree et al. reported a few complexes featuring an NHC isomer, namely an imidazol-5-ylidene, also termed abnormal NHC (aNHCs). In 2009, it was shown that providing to protect the C-2 position of an imidazolium salt, the deprotonation occurred at the C-5 position, affording imidazol-5-ylidenes that could be isolated. Over the last ten years, stable aNHCs have been used for designing a range of catalysts employing Pd(ii), Cu(i), Ni(ii), Fe(0), Zn(ii), Ag(i), and Au(i/iii) metal based precursors. These catalysts were utilized for different organic transformations such as the Suzuki-Miyaura cross-coupling reaction, C-H bond activation, dehydrogenative coupling, Huisgen 1,3-dipolar cycloaddition (click reaction), hydroheteroarylation, hydrosilylation reaction and migratory insertion of carbenes. Main-group metal complexes were also synthesized, including K(i), Al(iii), Zn(ii), Sn(ii), Ge(ii), and Si(ii/iv). Among them, K(i), Al(iii), and Zn(ii) complexes were used for the polymerization of caprolactone and rac-lactide at room temperature. In addition, based on the superior nucleophilicity of aNHCs, relative to that of their nNHCs isomers, they were used for small molecules activation, such as carbon dioxide (CO2), nitrous oxide (N2O), tetrahydrofuran (THF), tetrahydrothiophene and 9-borabicyclo[3.3.1]nonane (9BBN). aNHCs have also been shown to be efficient metal-free catalysts for ring opening polymerization of different cyclic esters at room temperature; they are among the most active metal-free catalysts for ε-caprolactone polymerization. Recently, aNHCs successfully accomplished the metal-free catalytic formylation of amides using CO2 and the catalytic reduction of carbon dioxide, including atmospheric CO2, into methanol, under ambient conditions. Although other transition metal complexes featuring aNHCs as ligand have been prepared and used in catalysis, this review article summarize the results obtained with the isolated aNHCs.
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Affiliation(s)
- Samaresh Chandra Sau
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, Nadia, West Bengal, India.
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80
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Skotnitzki J, Kremsmair A, Keefer D, Gong Y, Vivie‐Riedle R, Knochel P. Stereoselektive C(sp
3
)‐C(sp
2
)‐Kreuzkupplungen von chiralen sekundären Alkylzinkreagenzien mit Alkenyl‐ und Arylhalogeniden. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201910397] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Juri Skotnitzki
- Department Chemie Ludwig-Maximilians-Universität München Butenandtstrasse 5–13, Haus F 81377 München Deutschland
| | - Alexander Kremsmair
- Department Chemie Ludwig-Maximilians-Universität München Butenandtstrasse 5–13, Haus F 81377 München Deutschland
| | - Daniel Keefer
- Department Chemie Ludwig-Maximilians-Universität München Butenandtstrasse 5–13, Haus F 81377 München Deutschland
| | - Ye Gong
- Department Chemie Ludwig-Maximilians-Universität München Butenandtstrasse 5–13, Haus F 81377 München Deutschland
| | - Regina Vivie‐Riedle
- Department Chemie Ludwig-Maximilians-Universität München Butenandtstrasse 5–13, Haus F 81377 München Deutschland
| | - Paul Knochel
- Department Chemie Ludwig-Maximilians-Universität München Butenandtstrasse 5–13, Haus F 81377 München Deutschland
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81
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Skotnitzki J, Kremsmair A, Keefer D, Gong Y, de Vivie‐Riedle R, Knochel P. Stereoselective Csp 3 -Csp 2 Cross-Couplings of Chiral Secondary Alkylzinc Reagents with Alkenyl and Aryl Halides. Angew Chem Int Ed Engl 2020; 59:320-324. [PMID: 31529574 PMCID: PMC6973128 DOI: 10.1002/anie.201910397] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Revised: 09/13/2019] [Indexed: 11/10/2022]
Abstract
We report palladium-catalyzed cross-coupling reactions of chiral secondary non-stabilized dialkylzinc reagents, prepared from readily available chiral secondary alkyl iodides, with alkenyl and aryl halides. This method provides α-chiral alkenes and arenes with very high retention of configuration (dr up to 98:2) and satisfactory overall yields (up to 76 % for 3 reaction steps). The configurational stability of these chiral non-stabilized dialkylzinc reagents was determined and exceeded several hours at 25 °C. DFT calculations were performed to rationalize the stereoretention during the catalytic cycle. Furthermore, the cross-coupling reaction was applied in an efficient total synthesis of the sesquiterpenes (S)- and (R)-curcumene with control of the absolute stereochemistry.
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Affiliation(s)
- Juri Skotnitzki
- Department ChemieLudwig-Maximilians-Universität MünchenButenandtstrasse 5–13, Haus F81377MünchenGermany
| | - Alexander Kremsmair
- Department ChemieLudwig-Maximilians-Universität MünchenButenandtstrasse 5–13, Haus F81377MünchenGermany
| | - Daniel Keefer
- Department ChemieLudwig-Maximilians-Universität MünchenButenandtstrasse 5–13, Haus F81377MünchenGermany
| | - Ye Gong
- Department ChemieLudwig-Maximilians-Universität MünchenButenandtstrasse 5–13, Haus F81377MünchenGermany
| | - Regina de Vivie‐Riedle
- Department ChemieLudwig-Maximilians-Universität MünchenButenandtstrasse 5–13, Haus F81377MünchenGermany
| | - Paul Knochel
- Department ChemieLudwig-Maximilians-Universität MünchenButenandtstrasse 5–13, Haus F81377MünchenGermany
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82
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Liu B, Xu T, Li C, Bai J. An effective photothermal dual-responsive Pd 1Cu 4/Ce xO y catalyst for Suzuki–Miyaura coupling reactions under mild conditions. NEW J CHEM 2020. [DOI: 10.1039/c9nj06195a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
A Pd1Cu4/CexOy catalyst can efficiently catalyze Suzuki reactions under both heating and visible light irradiation conditions.
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Affiliation(s)
- Bo Liu
- Chemical Engineering College
- Inner Mongolia University of Technology
- Hohhot
- People's Republic of China
- Inner Mongolia Key Laboratory of Industrial Catalysis
| | - Tong Xu
- Chemical Engineering College
- Inner Mongolia University of Technology
- Hohhot
- People's Republic of China
- Inner Mongolia Key Laboratory of Industrial Catalysis
| | - Chunping Li
- Chemical Engineering College
- Inner Mongolia University of Technology
- Hohhot
- People's Republic of China
- Inner Mongolia Key Laboratory of Industrial Catalysis
| | - Jie Bai
- Chemical Engineering College
- Inner Mongolia University of Technology
- Hohhot
- People's Republic of China
- Inner Mongolia Key Laboratory of Industrial Catalysis
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83
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Srimontree W, Guo L, Rueping M. Hydride Transfer Enables the Nickel‐Catalyzed
ipso
‐Borylation and Silylation of Aldehydes. Chemistry 2019; 26:423-427. [DOI: 10.1002/chem.201904842] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Indexed: 11/08/2022]
Affiliation(s)
- Watchara Srimontree
- Institute of Organic ChemistryRWTH Aachen University Landoltweg 1 52074 Aachen Germany
| | - Lin Guo
- Institute of Organic ChemistryRWTH Aachen University Landoltweg 1 52074 Aachen Germany
| | - Magnus Rueping
- Institute of Organic ChemistryRWTH Aachen University Landoltweg 1 52074 Aachen Germany
- Kaust Catalysis Center (KCC)King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia
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84
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Schulze D, Klopfleisch M, Görls H, Westerhausen M. BOX A-type monopyrrolic heterocycles modified via the Suzuki-Miyaura cross-coupling reaction. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES 2019. [DOI: 10.1515/znb-2019-0125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The in vivo oxidation of heme yields bilirubin which is further degraded to the bilirubin oxidation end products (BOXes) that are biologically highly active. To study the mode of action and fate of (Z)-2-(4-methyl-5-oxo-3-vinyl-1,5-dihydro-2H-pyrrol-2-ylidene)acetamide (BOX A), the Suzuki-Miyaura cross-coupling reaction allows to introduce various alkenyl- and aryl-substituents in 3-position of the (Z)-2-(4-methyl-5-oxo-1,5-dihydro-2H-pyrrol-2-ylidene)acetamides (BOX A-type monopyrroles). The influence of these groups on structural and NMR-spectroscopic parameters of the central monopyrrolic system is negligible. Special focus has been given to derivatives with 3-positioned aryl substituents carrying trifluoromethyl groups for future in vivo
19F NMR studies.
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Affiliation(s)
- Daniel Schulze
- Friedrich Schiller University Jena , Chair of Inorganic Chemistry 1 , Humboldtstraße 8 , D-07743 Jena , Germany
| | - Maurice Klopfleisch
- Otto von Guericke University , Medicinal Faculty, Clinic for Radiology and Nuclear Medicine , D-39120 Magdeburg , Germany
| | - Helmar Görls
- Friedrich Schiller University Jena , Chair of Inorganic Chemistry 1 , Humboldtstraße 8 , D-07743 Jena , Germany
| | - Matthias Westerhausen
- Friedrich Schiller University Jena , Chair of Inorganic Chemistry 1 , Humboldtstraße 8 , D-07743 Jena , Germany , Fax: +49 (0) 3641-9-48132
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85
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Malapit CA, Bour JR, Laursen SR, Sanford MS. Mechanism and Scope of Nickel-Catalyzed Decarbonylative Borylation of Carboxylic Acid Fluorides. J Am Chem Soc 2019; 141:17322-17330. [PMID: 31617708 PMCID: PMC11103277 DOI: 10.1021/jacs.9b08961] [Citation(s) in RCA: 80] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
This Article describes the development of a base-free, nickel-catalyzed decarbonylative coupling of carboxylic acid fluorides with diboron reagents to selectively afford aryl boronate ester products. Detailed studies were conducted to assess the relative rates of direct transmetalation between aryl boronate esters and diboron reagents and a bisphosphine nickel(aryl)(fluoride) intermediate. These investigations revealed that diboron reagents undergo transmetalation with this Ni(aryl)(fluoride) intermediate at rates significantly faster than their aryl boronate ester congeners. Furthermore, the reactivity of both boron reagents toward transmetalation is enhanced with increasing electrophilicity of the boron center. These mechanistic insights were leveraged to develop a catalytic decarbonylative borylation of acid fluorides that proved applicable to a variety of (hetero)aryl carboxylic acid fluorides as well as diverse diboron reagents. The acid fluorides can be generated in situ directly from carboxylic acids. Furthermore, the mechanistic studies directed the identification of various air-stable Ni pre-catalysts for this transformation.
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Affiliation(s)
- Christian A. Malapit
- University of Michigan, Department of Chemistry, 930 North University Avenue, Ann Arbor, MI 48109 US
| | - James R. Bour
- University of Michigan, Department of Chemistry, 930 North University Avenue, Ann Arbor, MI 48109 US
| | - Simon R. Laursen
- University of Michigan, Department of Chemistry, 930 North University Avenue, Ann Arbor, MI 48109 US
| | - Melanie S. Sanford
- University of Michigan, Department of Chemistry, 930 North University Avenue, Ann Arbor, MI 48109 US
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86
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Ralph G, Biscoe MR. Preparation of Enantioenriched Alkylcarbastannatranes via Nucleophilic Inversion of Alkyl Mesylates for Use in Stereospecific Cross-Coupling Reactions. Organometallics 2019; 38:3912-3915. [PMID: 33824546 DOI: 10.1021/acs.organomet.9b00467] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report the preparation of enantioenriched secondary alkylcarbastannatranes via a stereoinvertive SN2 reaction of enantioenriched alkyl mesylates and carbastannatranyl anion equivalents. Using this process, enantioenriched secondary alcohols may be converted into highly enantioenriched alkylcarbastannatranes, which are useful in stereospecific cross-coupling reactions.
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Affiliation(s)
- Glenn Ralph
- Department of Chemistry, 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
| | - Mark R Biscoe
- Department of Chemistry, 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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87
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Mutoh Y, Yamamoto K, Saito S. Suzuki–Miyaura Cross-Coupling of 1,8-Diaminonaphthalene (dan)-Protected Arylboronic Acids. ACS Catal 2019. [DOI: 10.1021/acscatal.9b03667] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yuichiro Mutoh
- Department of Chemistry, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka,
Shinjuku-ku, Tokyo 162-8601, Japan
| | - Kensuke Yamamoto
- Department of Chemistry, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka,
Shinjuku-ku, Tokyo 162-8601, Japan
| | - Shinichi Saito
- Department of Chemistry, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka,
Shinjuku-ku, Tokyo 162-8601, Japan
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88
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González J, van Dijk L, Goetzke FW, Fletcher SP. Highly enantioselective rhodium-catalyzed cross-coupling of boronic acids and racemic allyl halides. Nat Protoc 2019; 14:2972-2985. [PMID: 31541227 DOI: 10.1038/s41596-019-0209-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Accepted: 06/06/2019] [Indexed: 11/09/2022]
Abstract
Although Csp2-Csp2 Suzuki-Miyaura couplings (SMCs) are widely used in small-molecule synthesis, related methods that allow the incorporation of Csp3-hybridized coupling partners, particularly in an asymmetric manner, are less developed. This protocol describes catalytic asymmetric SMC reactions that provide access to enantiomerically enriched cyclic allylic products. The method couples racemic allyl halide starting materials with sp2-hybridized boronic acid derivatives and is compatible with heterocyclic coupling partners. These reactions are catalyzed by a rhodium-ligand complex and typically display very high levels of enantioselectivity (>95% enantiomeric excess (ee)). In this protocol, we detail a procedure using a dihydropyridine-derived allyl chloride for the synthesis of (-)-(S)-tert-butyl-3-(4-bromophenyl)-3,6-dihydropyridine-1(2H)-carboxylate, an intermediate in the synthesis of the anticancer drug niraparib. This procedure affords 1.17 g (86% yield) of the coupling product with 96% ee. The initial experimental setup of the reaction takes 45-50 min, and the reaction is complete within 4-5 h.
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Affiliation(s)
- Jesús González
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Oxford, UK
| | - Lucy van Dijk
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Oxford, UK
| | - F Wieland Goetzke
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Oxford, UK
| | - Stephen P Fletcher
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Oxford, UK.
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89
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Tber Z, Biteau NG, Agrofoglio L, Cros J, Goffinont S, Castaing B, Nicolas C, Roy V. Microwave-Assisted Suzuki-Miyaura and Sonogashira Coupling of 4-Chloro-2-(trifluoromethyl)pyrido[1,2- e
]purine Derivatives. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900921] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Zahira Tber
- Institut de Chimie Organique et Analytique, UMR CNRS 7311; Université d'Orléans; Rue de Chartres - BP 6759, 45067 Orléans cedex 2 France
| | - Nicolas G. Biteau
- Institut de Chimie Organique et Analytique, UMR CNRS 7311; Université d'Orléans; Rue de Chartres - BP 6759, 45067 Orléans cedex 2 France
| | - Luigi Agrofoglio
- Institut de Chimie Organique et Analytique, UMR CNRS 7311; Université d'Orléans; Rue de Chartres - BP 6759, 45067 Orléans cedex 2 France
| | - Julien Cros
- Centre de Biophysique Moléculaire; 45072 Orléans France
| | | | | | - Cyril Nicolas
- Institut de Chimie Organique et Analytique, UMR CNRS 7311; Université d'Orléans; Rue de Chartres - BP 6759, 45067 Orléans cedex 2 France
| | - Vincent Roy
- Institut de Chimie Organique et Analytique, UMR CNRS 7311; Université d'Orléans; Rue de Chartres - BP 6759, 45067 Orléans cedex 2 France
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90
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Mu X, Axtell JC, Bernier NA, Kirlikovali KO, Jung D, Umanzor A, Qian K, Chen X, Bay KL, Kirollos M, Rheingold AL, Houk KN, Spokoyny AM. Sterically Unprotected Nucleophilic Boron Cluster Reagents. Chem 2019; 5:2461-2469. [PMID: 32292833 DOI: 10.1016/j.chempr.2019.07.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A cornerstone of modern synthetic chemistry rests on the ability to manipulate the reactivity of a carbon center by rendering it either electrophilic or nucleophilic. However, accessing a similar reactivity spectrum with boron-based reagents has been significantly more challenging. While classical nucleophilic carbon-based reagents normally do not require steric protection, readily accessible, unprotected boron-based nucleophiles have not yet been realized. Herein, we demonstrate that the bench stable closo-hexaborate cluster anion can engage in a nucleophilic substitution reaction with a wide array of organic and main group electrophiles. The resulting molecules containing B‒C bonds can be further converted to tricoordinate boron species widely used in organic synthesis.
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Affiliation(s)
- Xin Mu
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 609 Charles E. Young Drive East, Los Angeles, CA 90095, USA
| | - Jonathan C Axtell
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 609 Charles E. Young Drive East, Los Angeles, CA 90095, USA
| | - Nicholas A Bernier
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 609 Charles E. Young Drive East, Los Angeles, CA 90095, USA
| | - Kent O Kirlikovali
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 609 Charles E. Young Drive East, Los Angeles, CA 90095, USA
| | - Dahee Jung
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 609 Charles E. Young Drive East, Los Angeles, CA 90095, USA
| | - Alexander Umanzor
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 609 Charles E. Young Drive East, Los Angeles, CA 90095, USA
| | - Kevin Qian
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 609 Charles E. Young Drive East, Los Angeles, CA 90095, USA
| | - Xiangyang Chen
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 609 Charles E. Young Drive East, Los Angeles, CA 90095, USA
| | - Katherine L Bay
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 609 Charles E. Young Drive East, Los Angeles, CA 90095, USA
| | - Monica Kirollos
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 609 Charles E. Young Drive East, Los Angeles, CA 90095, USA
| | - Arnold L Rheingold
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, California, 92093, USA
| | - K N Houk
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 609 Charles E. Young Drive East, Los Angeles, CA 90095, USA
| | - Alexander M Spokoyny
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 609 Charles E. Young Drive East, Los Angeles, CA 90095, USA.,Department California NanoSystems Institute, University of California, Los Angeles, CA 90095, USA.,Lead Contact
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91
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Léonard NG, Palmer WN, Friedfeld MR, Bezdek MJ, Chirik PJ. Remote, Diastereoselective Cobalt-Catalyzed Alkene Isomerization–Hydroboration: Access to Stereodefined 1,3-Difunctionalized Indanes. ACS Catal 2019. [DOI: 10.1021/acscatal.9b03444] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Nadia G. Léonard
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - W. Neil Palmer
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Max R. Friedfeld
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Máté J. Bezdek
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Paul J. Chirik
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
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92
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Yamamoto T, Ishibashi A, Suginome M. Boryl-Directed, Ir-Catalyzed C(sp 3)-H Borylation of Alkylboronic Acids Leading to Site-Selective Synthesis of Polyborylalkanes. Org Lett 2019; 21:6235-6240. [PMID: 31386387 DOI: 10.1021/acs.orglett.9b02112] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Pyrazolylaniline serves as a temporary directing group attached to the boron atom of alkylboronic acids in Ir-catalyzed C(sp3)-H borylation. The reaction takes place at α-, β-, and γ-C-H bonds, giving polyborylated products including di-, tri-, tetra-, and even pentaborylalkanes. α-C-H borylation was generally found to be the preferred reaction of primary alkylboronic acid derivatives, whereas β- or γ-borylation also occurred if β- or γ-C-H bonds were located on the methyl group.
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Affiliation(s)
- Takeshi Yamamoto
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering , Kyoto University , Katsura, Nishikyo-ku , Kyoto 615-8510 , Japan
| | - Aoi Ishibashi
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering , Kyoto University , Katsura, Nishikyo-ku , Kyoto 615-8510 , Japan
| | - Michinori Suginome
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering , Kyoto University , Katsura, Nishikyo-ku , Kyoto 615-8510 , Japan
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93
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Curto SG, de las Heras LA, Esteruelas MA, Oliván M, Oñate E. C(sp3)–Cl Bond Activation Promoted by a POP-Pincer Rhodium(I) Complex. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00409] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Sheila G. Curto
- Departamento de Química Inorgánica-Instituto de Síntesis Química y Catálisis Homogénea (ISQCH)-Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Laura A. de las Heras
- Departamento de Química Inorgánica-Instituto de Síntesis Química y Catálisis Homogénea (ISQCH)-Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Miguel A. Esteruelas
- Departamento de Química Inorgánica-Instituto de Síntesis Química y Catálisis Homogénea (ISQCH)-Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Montserrat Oliván
- Departamento de Química Inorgánica-Instituto de Síntesis Química y Catálisis Homogénea (ISQCH)-Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Enrique Oñate
- Departamento de Química Inorgánica-Instituto de Síntesis Química y Catálisis Homogénea (ISQCH)-Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
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94
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Luo Z, Xiong L, Liu T, Zhang Y, Lu S, Chen Y, Guo W, Zhu Y, Zeng Z. Palladium-Catalyzed Decarbonylative Suzuki–Miyaura Coupling of Amides To Achieve Biaryls via C–N Bond Cleavage. J Org Chem 2019; 84:10559-10568. [DOI: 10.1021/acs.joc.9b01103] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Zhongfeng Luo
- College of Chemistry and Environment, South China Normal University, Guangzhou 510006, China
| | - Li Xiong
- College of Chemistry and Environment, South China Normal University, Guangzhou 510006, China
| | - Tingting Liu
- College of Chemistry and Environment, South China Normal University, Guangzhou 510006, China
| | - Yuqi Zhang
- College of Chemistry and Environment, South China Normal University, Guangzhou 510006, China
| | - Siqi Lu
- College of Chemistry and Environment, South China Normal University, Guangzhou 510006, China
| | - Yuwen Chen
- College of Chemistry and Environment, South China Normal University, Guangzhou 510006, China
| | - Weijie Guo
- College of Chemistry and Environment, South China Normal University, Guangzhou 510006, China
| | - Yulin Zhu
- College of Chemistry and Environment, South China Normal University, Guangzhou 510006, China
| | - Zhuo Zeng
- College of Chemistry and Environment, South China Normal University, Guangzhou 510006, China
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
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95
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Wu C, Bao Z, Xu X, Wang J. Metal-free synthesis of gem-silylboronate esters and their Pd(0)-catalyzed cross-coupling with aryliodides. Org Biomol Chem 2019; 17:5714-5724. [PMID: 31120089 DOI: 10.1039/c9ob01006h] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
A transition-metal-free method for the synthesis of gem-silylboronate esters with arylboronic acids and trimethylsilyldiazomethane (TMSCHN2) has been developed. This transformation is a straightforward homologation of arylboronic acids and features wide substrate scope and good functional-group tolerance. The gem-silylboronate esters undergo efficient Suzuki-Miyaura cross-coupling with aryliodides and the silyl group of the product can be further functionalized. Tertiary carbon centers with different substituents can be constructed successfully by selective and sequential functionalization.
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Affiliation(s)
- Chaoqiang Wu
- Beijing National Laboratory of Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China.
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96
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Chakrabarty S, Palencia H, Morton MD, Carr RO, Takacs JM. Facile access to functionalized chiral secondary benzylic boronic esters via catalytic asymmetric hydroboration. Chem Sci 2019; 10:4854-4861. [PMID: 31183035 PMCID: PMC6520923 DOI: 10.1039/c8sc05613g] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Accepted: 03/25/2019] [Indexed: 12/29/2022] Open
Abstract
Allylic and homoallylic phosphonates bearing an aryl or heteroaryl substituent at the γ- or δ-position undergo rhodium-catalyzed asymmetric hydroboration by pinacolborane to give functionalized chiral secondary benzylic boronic esters in yields up to 86% and enantiomer ratios up to 99 : 1. Compared to minimally-functionalized terminal and 1,1-disubstituted vinyl arenes, there are relatively few reports of efficient catalytic asymmetric hydroboration (CAHB) of more highly functionalized internal alkenes. Phosphonate substrates bearing a variety of common heterocyclic ring systems, including furan, indole, pyrrole and thiophene derivatives, as well as those bearing basic nitrogen substituents (e.g., morpholine and pyrazine) are tolerated, although donor substituents positioned in close proximity of the alkene can influence the course of the reaction. Stereoisomeric (E)- and (Z)-substrates afford the same major enantiomer of the borated product. Deuterium-labelling studies reveal that rapid (Z)- to (E)-alkene isomerization accounts for the observed (E/Z)-stereoconvergence during CAHB. The synthetic utility of the chiral boronic ester products is illustrated by stereospecific C-B bond transformations including stereoretentive electrophile promoted 1,2-B-to-C migrations, stereoinvertive SE2 reactions of boron-ate complexes with electrophiles, and stereoretentive palladium- and rhodium-catalyzed cross-coupling protocols.
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Affiliation(s)
- Suman Chakrabarty
- Department of Chemistry , University of Nebraska-Lincoln , Lincoln , Nebraska 68588-0304 , USA .
| | - Hector Palencia
- Department of Chemistry , University of Nebraska-Kearney , Kearney , Nebraska 68849 , USA
| | - Martha D Morton
- Department of Chemistry , University of Nebraska-Lincoln , Lincoln , Nebraska 68588-0304 , USA . .,Nebraska Center for Integrated Biomolecular Communication (NCIBC) , University of Nebraska-Lincoln , Lincoln , Nebraska 68588-0304 , USA
| | - Ryan O Carr
- Department of Chemistry , University of Nebraska-Lincoln , Lincoln , Nebraska 68588-0304 , USA .
| | - James M Takacs
- Department of Chemistry , University of Nebraska-Lincoln , Lincoln , Nebraska 68588-0304 , USA . .,Nebraska Center for Integrated Biomolecular Communication (NCIBC) , University of Nebraska-Lincoln , Lincoln , Nebraska 68588-0304 , USA
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97
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Rai P, Maji K, Maji B. Photoredox/Cobalt Dual Catalysis for Visible-Light-Mediated Alkene–Alkyne Coupling. Org Lett 2019; 21:3755-3759. [DOI: 10.1021/acs.orglett.9b01201] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Pramod Rai
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, India
| | - Kakoli Maji
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, India
| | - Biplab Maji
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, India
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98
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Sinha N, Champagne PA, Rodriguez MJ, Lu Y, Kopach ME, Mitchell D, Organ MG. One-Pot Sequential Kumada-Tamao-Corriu Couplings of (Hetero)Aryl Polyhalides in the Presence of Grignard-Sensitive Functional Groups Using Pd-PEPPSI-IPent Cl. Chemistry 2019; 25:6508-6512. [PMID: 30972856 DOI: 10.1002/chem.201901150] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Indexed: 11/10/2022]
Abstract
We report a general and rapid chemoselective Kumada-Tamao-Corriu (KTC) cross-coupling of aryl bromides in the presence of chlorides or triflates with functionalized Grignard reagents at 0 °C in 15 min by using Pd-PEPPSI-IPentCl (C4). Nucleophiles and electrophiles (or both) can contain Grignard-sensitive functional groups (-CN, -COOR, etc.). Control experiments together with DFT calculations suggest that transmetallation is rate limiting for the selective cross-coupling of Br in the presence of Cl/OTf with functionalized Grignard reagents. One-pot sequential KTC/KTC cross-couplings with bromo-chloro arenes have been demonstrated for the first time. We also report the one-pot sequential KTC/Negishi cross-couplings using C4 showcasing the versatility of this methodology.
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Affiliation(s)
- Narayan Sinha
- Department of Chemistry, York University, 4700 Keele Street, Toronto, Ontario, M3J 1P3, Canada.,Centre for Catalysis Research and Innovation (CCRI), and Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario, K1N 6N5, Canada
| | - Pier Alexandre Champagne
- Centre for Catalysis Research and Innovation (CCRI), and Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario, K1N 6N5, Canada
| | | | - Yu Lu
- Lilly Research Laboratories, Indianapolis, IN, 46285, USA
| | | | - David Mitchell
- Lilly Research Laboratories, Indianapolis, IN, 46285, USA
| | - Michael G Organ
- Department of Chemistry, York University, 4700 Keele Street, Toronto, Ontario, M3J 1P3, Canada.,Centre for Catalysis Research and Innovation (CCRI), and Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario, K1N 6N5, Canada
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99
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Xu MY, Jiang WT, Li Y, Xu QH, Zhou QL, Yang S, Xiao B. Alkyl Carbagermatranes Enable Practical Palladium-Catalyzed sp 2-sp 3 Cross-Coupling. J Am Chem Soc 2019; 141:7582-7588. [PMID: 30998348 DOI: 10.1021/jacs.9b02776] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Pd-catalyzed cross-coupling reactions have achieved tremendous accomplishments in the past decades. However, C(sp3)-hybridized nucleophiles generally remain as challenging coupling partners due to their sluggish transmetalation compared to the C(sp2)-hybridized counterparts. While a single-electron-transfer-based strategy using C(sp3)-hybridized nucleophiles had made significant progress recently, fewer breakthroughs have been made concerning the traditional two-electron mechanism involving C(sp3)-hybridized nucleophiles. In this report, we present a series of unique alkyl carbagermatranes that were proven to be highly reactive in cross-coupling reactions with our newly developed electron-deficient phosphine ligands. Generally, secondary alkyl carbagermatranes show slightly lower, yet comparable activity to its Sn analogue. Meanwhile, primary alkyl carbagermatranes exhibit high activity, and they were also proved stable enough to be compatible with various reactions. Chiral secondary benzyl carbagermatrane gave the coupling product under base/additive-free conditions with its configuration fully inversed, suggesting that transmetalation was carried out in an "SE2(open) Inv" pathway, which is consistent with Hiyama's previous observation. Notably, the cross-coupling of primary alkyl carbagermatranes could be performed under base/additive-free conditions with excellent functional group tolerance and therefore may have potentially important applications such as stapled peptide synthesis.
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Affiliation(s)
- Meng-Yu Xu
- Department of Chemistry , University of Science and Technology of China , Hefei 230026 , China
| | - Wei-Tao Jiang
- Department of Chemistry , University of Science and Technology of China , Hefei 230026 , China
| | - Ying Li
- Department of Chemistry , University of Science and Technology of China , Hefei 230026 , China
| | - Qing-Hao Xu
- Department of Chemistry , University of Science and Technology of China , Hefei 230026 , China
| | - Qiao-Lan Zhou
- Department of Chemistry , University of Science and Technology of China , Hefei 230026 , China
| | - Shuo Yang
- Department of Chemistry , University of Science and Technology of China , Hefei 230026 , China
| | - Bin Xiao
- Department of Chemistry , University of Science and Technology of China , Hefei 230026 , China
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100
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Armstrong MK, Lalic G. Differential Dihydrofunctionalization of Terminal Alkynes: Synthesis of Benzylic Alkyl Boronates through Reductive Three-Component Coupling. J Am Chem Soc 2019; 141:6173-6179. [PMID: 30942593 DOI: 10.1021/jacs.9b02372] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The differential dihydrofunctionalization of terminal alkynes is accomplished through the reductive three-component coupling of terminal alkynes, aryl halides, and pinacolborane. The transformation results in hydrofunctionalization of both π-bonds of an alkyne in a single reaction promoted by cooperative action of a copper/palladium catalyst system. The differential dihydrofunctionalization reaction has excellent substrate scope and can be accomplished in the presence of esters, nitriles, alkyl halides, epoxides, acetals, alkenes, aryl halides, and silyl ethers. Mechanistic experiments indicate that the reaction proceeds through copper-catalyzed hydroboration followed by a second hydrocupration. The resulting heterobimetallic complex is the key intermediate that participates in the subsequent palladium-catalyzed cross-coupling, which furnishes benzylic alkyl boronate products.
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Affiliation(s)
- Megan K Armstrong
- Department of Chemistry , University of Washington , Seattle , Washington 98195 , United States
| | - Gojko Lalic
- Department of Chemistry , University of Washington , Seattle , Washington 98195 , United States
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