1
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Kunz S, Barnå F, Urrutia MP, Ingner FJL, Martínez-Topete A, Orthaber A, Gates PJ, Pilarski LT, Dyrager C. Derivatization of 2,1,3-Benzothiadiazole via Regioselective C-H Functionalization and Aryne Reactivity. J Org Chem 2024; 89:6138-6148. [PMID: 38648018 PMCID: PMC11077497 DOI: 10.1021/acs.joc.4c00122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Revised: 02/29/2024] [Accepted: 03/15/2024] [Indexed: 04/25/2024]
Abstract
Despite growing interest in 2,1,3-benzothiadiazole (BTD) as an integral component of many functional molecules, methods for the functionalization of its benzenoid ring have remained limited, and many even simply decorated BTDs have required de novo synthesis. We show that regioselective Ir-catalyzed C-H borylation allows access to versatile 5-boryl or 4,6-diboryl BTD building blocks, which undergo functionalization at the C4, C5, C6, and C7 positions. The optimization and regioselectivity of C-H borylation are discussed. A broad reaction scope is presented, encompassing ipso substitution at the C-B bond, the first examples of ortho-directed C-H functionalization of BTD, ring closing reactions to generate fused ring systems, as well as the generation and capture reactions of novel BTD-based heteroarynes. The regioselectivity of the latter is discussed with reference to the Aryne Distortion Model.
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Affiliation(s)
- Susanna Kunz
- Department
of Chemistry—BMC, Uppsala University, Box 576, Uppsala 75123, Sweden
| | - Fredrik Barnå
- Department
of Chemistry—BMC, Uppsala University, Box 576, Uppsala 75123, Sweden
| | | | | | | | - Andreas Orthaber
- Department
of Chemistry—Ångström, Uppsala University, Box 523, Uppsala 75120, Sweden
| | - Paul J. Gates
- School
of Chemistry, University of Bristol, Cantock’s Close, Clifton, Bristol BS8 1TS, U.K.
| | - Lukasz T. Pilarski
- Department
of Chemistry—BMC, Uppsala University, Box 576, Uppsala 75123, Sweden
| | - Christine Dyrager
- Department
of Chemistry—BMC, Uppsala University, Box 576, Uppsala 75123, Sweden
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2
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Wang T, Wang ZJ, Wang M, Wu L, Fang X, Liang Y, Lv J, Shi Z. Metal-Free Stereoconvergent C-H Borylation of Enamides. Angew Chem Int Ed Engl 2023; 62:e202313205. [PMID: 37721200 DOI: 10.1002/anie.202313205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 09/15/2023] [Accepted: 09/18/2023] [Indexed: 09/19/2023]
Abstract
Enamides, functional derivatives of enamines, play a significant role as synthetic targets. However, the stereoselective synthesis of these molecules has posed a longstanding challenge in organic chemistry, particularly for acyclic enamides that are less thermodynamically stable. In this study, we present a general strategy for constructing β-borylenamides by C-H borylation, which provides a versatile platform for generating the stereodefined enamides. Our approach involves the utilization of metalloid borenium cation, generated through the reaction of BBr3 and enamides in the presence of two different additives, avoiding any exogenous catalyst. Importantly, the stereoconvergent nature of this methodology allows for the use of starting materials with mixed E/Z configurations, thus highlighting the unique advantage of this chemistry. Mechanistic investigations have shed light on the pivotal roles played by the two additives, the reactive boron species, and the phenomenon of stereoconvergence.
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Affiliation(s)
- Tianhang Wang
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu, 210093, China
| | - Zheng-Jun Wang
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu, 210093, China
- Wenzhou Key Lab of Advanced Energy Storage and Conversion, Zhejiang Province Key Lab of Leather Engineering, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang, 325035, China
| | - Minyan Wang
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu, 210093, China
| | - Lei Wu
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu, 210093, China
| | - Xiaowu Fang
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu, 210093, China
| | - Yong Liang
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu, 210093, China
| | - Jiahang Lv
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu, 210093, China
| | - Zhuangzhi Shi
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu, 210093, China
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan, 453007, China
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3
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Varlet T, Portmann S, Fürstner A. Total Synthesis of Njaoamine C by Concurrent Macrocycle Formation. J Am Chem Soc 2023; 145:21197-21202. [PMID: 37734001 PMCID: PMC10557140 DOI: 10.1021/jacs.3c08410] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Indexed: 09/23/2023]
Abstract
In conceptual terms, the first total synthesis of the cytotoxic marine natural product njaoamine C differs from all known approaches toward related alkaloids of the manzamine superfamily in that both macrocyclic rings enveloping the diazatricyclic core are concomitantly formed; this goal was reached by double ring closing alkyne metathesis (dRCAM). The success of this maneuver does not merely reflect a favorable preorientation of the four alkyne chains that need to be concatenated in the proper pairwise manner but is also the outcome of dynamic covalent chemistry involving error correction by the chosen "canopy" molybdenum alkylidyne catalyst. The end game downstream of dRCAM capitalizes on the striking chemoselectivity of palladium-catalyzed hydrostannation, which selects for (hetero)arylalkynes even in the presence of sterically much more accessible dialkylalkynes or alkenes; for this preference, the method complements the classical repertoire of hydrometalation and semireduction reactions.
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Affiliation(s)
- Thomas Varlet
- Max-Planck-Institut für
Kohlenforschung, 45470 Mülheim/Ruhr, Germany
| | - Sören Portmann
- Max-Planck-Institut für
Kohlenforschung, 45470 Mülheim/Ruhr, Germany
| | - Alois Fürstner
- Max-Planck-Institut für
Kohlenforschung, 45470 Mülheim/Ruhr, Germany
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4
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Al Mamari HH, Borel J, Hickey A, Courtney E, Merz J, Zhang X, Friedrich A, Marder TB, McGlacken GP. Regioselective Iridium-Catalyzed C8-H Borylation of 4-Quinolones via Transient O-Borylated Quinolines. Chemistry 2023; 29:e202301734. [PMID: 37280155 DOI: 10.1002/chem.202301734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 06/04/2023] [Accepted: 06/05/2023] [Indexed: 06/08/2023]
Abstract
The quinolone-quinoline tautomerization is harnessed to effect the regioselective C8-borylation of biologically important 4-quinolones by using [Ir(OMe)(cod)]2 as the catalyst precursor, the silica-supported monodentate phosphine Si-SMAP as the ligand, and B2 pin2 as the boron source. Initially, O-borylation of the quinoline tautomer takes place. Critically, the newly formed 4-(pinBO)-quinolines then undergo N-directed selective Ir-catalyzed borylation at C8. Hydrolysis of the OBpin moiety on workup returns the system to the quinolone tautomer. The C8-borylated quinolines were converted to their corresponding potassium trifluoroborate (BF3 K) salts and to their C8-chlorinated quinolone derivatives. The two-step C-H borylation-chlorination reaction sequence resulted in various C8-Cl quinolones in good yields. Conversion to C8-OH-, C8-NH2 -, and C8-Ar-substituted quinolones was also feasible by using this methodology.
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Affiliation(s)
- Hamad H Al Mamari
- Department of Chemistry, College of Science, Sultan Qaboos University, PO Box 36, Al Khoudh 123, Muscat, Sultanate of Oman
- Institut für Anorganische Chemie and, Institute for Sustainable Chemistry & Catalysis with Boron (ICB), Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Julie Borel
- Institut für Anorganische Chemie and, Institute for Sustainable Chemistry & Catalysis with Boron (ICB), Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Aobha Hickey
- School of Chemistry & Analytical and, Biological Chemistry Research Facility, University College Cork, T12 YN60, Ireland
| | - Eimear Courtney
- School of Chemistry & Analytical and, Biological Chemistry Research Facility, University College Cork, T12 YN60, Ireland
| | - Julia Merz
- Institut für Anorganische Chemie and, Institute for Sustainable Chemistry & Catalysis with Boron (ICB), Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Xiaolei Zhang
- Institut für Anorganische Chemie and, Institute for Sustainable Chemistry & Catalysis with Boron (ICB), Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Alexandra Friedrich
- Institut für Anorganische Chemie and, Institute for Sustainable Chemistry & Catalysis with Boron (ICB), Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Todd B Marder
- Institut für Anorganische Chemie and, Institute for Sustainable Chemistry & Catalysis with Boron (ICB), Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Gerard P McGlacken
- School of Chemistry & Analytical and, Biological Chemistry Research Facility, University College Cork, T12 YN60, Ireland
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5
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Wang Z, Chen J, Lin Z, Quan Y. Photoinduced Dehydrogenative Borylation via Dihydrogen Bond Bridged Electron Donor and Acceptor Complexes. Chemistry 2023; 29:e202203053. [PMID: 36396602 DOI: 10.1002/chem.202203053] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 11/17/2022] [Accepted: 11/17/2022] [Indexed: 11/19/2022]
Abstract
Air-stable amine- and phosphine-boranes are discovered as donors to integrate with pyridinium acceptor for generating photoactive electron-donor-acceptor (EDA) complexes. Experimental results and DFT calculations suggest a dihydrogen bond bridging the donor and acceptor. Irradiating the EDA complex enables an intra-complex single electron transfer to give a boron-centered radical for dehydrogenative borylation with no need of external photosensitizer and radical initiator. The deprotonation of Wheland-like radical intermediate rather than its generation is believed to determine the good ortho-selectivity based on DFT calculations. A variety of α-borylated pyridine derivatives have been readily synthesized with good functional group tolerance.
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Affiliation(s)
- Zhiyong Wang
- Department of Chemistry, The Hong Kong University of Science and Technology Clear Water Bay, Kowloon, Hong Kong SAR, P. R. China
| | - Jiaxin Chen
- Department of Chemistry, The Hong Kong University of Science and Technology Clear Water Bay, Kowloon, Hong Kong SAR, P. R. China
| | - Zhenyang Lin
- Department of Chemistry, The Hong Kong University of Science and Technology Clear Water Bay, Kowloon, Hong Kong SAR, P. R. China
| | - Yangjian Quan
- Department of Chemistry, The Hong Kong University of Science and Technology Clear Water Bay, Kowloon, Hong Kong SAR, P. R. China
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6
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Fan Z, Chen X, Tanaka K, Park HS, Lam NYS, Wong JJ, Houk KN, Yu JQ. Molecular editing of aza-arene C-H bonds by distance, geometry and chirality. Nature 2022; 610:87-93. [PMID: 35944562 PMCID: PMC10292866 DOI: 10.1038/s41586-022-05175-1] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Accepted: 08/02/2022] [Indexed: 11/09/2022]
Abstract
Direct molecular editing of heteroarene carbon-hydrogen (C-H) bonds through consecutive selective C-H functionalization has the potential to grant rapid access into diverse chemical spaces, which is a valuable but often challenging venture to achieve in medicinal chemistry1. In contrast to electronically biased heterocyclic C-H bonds2-9, remote benzocyclic C-H bonds on bicyclic aza-arenes are especially difficult to differentiate because of the lack of intrinsic steric/electronic biases10-12. Here we report two conceptually distinct directing templates that enable the modular differentiation and functionalization of adjacent remote (C6 versus C7) and positionally similar (C3 versus C7) positions on bicyclic aza-arenes through careful modulation of distance, geometry and previously unconsidered chirality in template design. This strategy enables direct C-H olefination, alkynylation and allylation at adjacent C6 and C7 positions of quinolines in the presence of a competing C3 position that is spatially similar to C7. Notably, such site-selective, iterative and late-stage C-H editing of quinoline-containing pharmacophores can be performed in a modular fashion in different orders to suit bespoke synthetic applications. This Article, in combination with previously reported complementary methods, now fully establishes a unified late-stage 'molecular editing' strategy to directly modify bicyclic aza-arenes at any given site in different orders.
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Affiliation(s)
- Zhoulong Fan
- Department of Chemistry, The Scripps Research Institute, La Jolla, CA, USA
| | - Xiangyang Chen
- Department of Chemistry and Biochemistry, University of California, Los Angeles, CA, USA
| | - Keita Tanaka
- Department of Chemistry, The Scripps Research Institute, La Jolla, CA, USA
| | - Han Seul Park
- Department of Chemistry, The Scripps Research Institute, La Jolla, CA, USA
| | - Nelson Y S Lam
- Department of Chemistry, The Scripps Research Institute, La Jolla, CA, USA
| | - Jonathan J Wong
- Department of Chemistry and Biochemistry, University of California, Los Angeles, CA, USA
| | - K N Houk
- Department of Chemistry and Biochemistry, University of California, Los Angeles, CA, USA.
| | - Jin-Quan Yu
- Department of Chemistry, The Scripps Research Institute, La Jolla, CA, USA.
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7
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de las Heras L, Esteruelas MA, Oliván M, Oñate E. Rhodium-Promoted C-H Bond Activation of Quinoline, Methylquinolines, and Related Mono-Substituted Quinolines. Organometallics 2022; 41:2317-2326. [PMID: 36866062 PMCID: PMC9969481 DOI: 10.1021/acs.organomet.2c00270] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Indexed: 11/28/2022]
Abstract
The C-H bond activation of methylquinolines, quinoline, 3-methoxyquinoline, and 3-(trifluoromethyl)quinoline promoted by the square-planar rhodium(I) complex RhH{κ3-P,O,P-[xant(PiPr2)2]} [1; xant(PiPr2)2 = 9,9-dimethyl-4,5-bis(diisopropylphosphino)xanthene] has been systematically studied. Results reveal that the activation of the heteroring is preferred over the activation of the carbocycle, and the activated position depends upon the position of the substituent in the substrate. Thus, 3-, 4-, and 5-methylquinoline reacts with 1 to quantitatively form square-planar rhodium(I)-(2-quinolinyl) derivatives, whereas 2-, 6-, and 7-methylquinoline quantitatively leads to rhodium(I)-(4-quinolinyl) species. By contrast, quinoline and 8-methylquinoline afford mixtures of the respective rhodium(I)-(2-quinolinyl) and -(4-quinolinyl) complexes. 3-Methoxyquinoline displays the same behavior as that of 3-methylquinoline, while 3-(trifluoromethyl)quinoline yields a mixture of rhodium(I)-(2-quinolinyl), -(4-quinolinyl), -(6-quinolinyl), and -(7-quinolinyl) isomers.
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8
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Hickey A, Merz J, Al Mamari HH, Friedrich A, Marder TB, McGlacken GP. Iridium-Catalyzed Borylation of 6-Fluoroquinolines: Access to 6-Fluoroquinolones. J Org Chem 2022; 87:9977-9987. [PMID: 35839386 PMCID: PMC9368603 DOI: 10.1021/acs.joc.2c00973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
![]()
The Ir-catalyzed C–H borylation of fluoroquinolines
has
been realized. The quinoline boronic ester formed undergoes a range
of
important transformations of relevance to medicinal chemistry. Judicious
choice of the substituent at C4 on the quinoline facilitated the unmasking
of a fluoroquinolone—the core structure of many antibiotics.
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Affiliation(s)
- Aobha Hickey
- School of Chemistry & Analytical and Biological Chemistry Research Facility, University College Cork, Cork T12 YN60, Ireland
| | - Julia Merz
- Institute for Inorganic Chemistry, and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Hamad H Al Mamari
- Institute for Inorganic Chemistry, and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany.,Department of Chemistry, College of Science, Sultan Qaboos University, P.O. Box 36, Al Khoudh 123 Muscat, Sultanate of Oman
| | - Alexandra Friedrich
- Institute for Inorganic Chemistry, and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Todd B Marder
- Institute for Inorganic Chemistry, and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Gerard P McGlacken
- School of Chemistry & Analytical and Biological Chemistry Research Facility, University College Cork, Cork T12 YN60, Ireland.,Synthesis and Solid State Pharmaceutical Centre, University College Cork, Cork T12 YN60, Ireland
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9
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Bisht R, Haldar C, Hassan MMM, Hoque ME, Chaturvedi J, Chattopadhyay B. Metal-catalysed C-H bond activation and borylation. Chem Soc Rev 2022; 51:5042-5100. [PMID: 35635434 DOI: 10.1039/d1cs01012c] [Citation(s) in RCA: 72] [Impact Index Per Article: 36.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Transition metal-catalysed direct borylation of hydrocarbons via C-H bond activation has received a remarkable level of attention as a popular reaction in the synthesis of organoboron compounds owing to their synthetic versatility. While controlling the site-selectivity was one of the most challenging issues in these C-H borylation reactions, enormous efforts of several research groups proved instrumental in dealing with selectivity issues that presently reached an impressive level for both proximal and distal C-H bond borylation reactions. For example, in the case of ortho C-H bond borylation reactions, innovative methodologies have been developed either by the modification of the directing groups attached with the substrates or by creating new catalytic systems via the design of new ligand frameworks. Whereas meta and para selective C-H borylations remained a formidable challenge, numerous innovative concepts have been developed within a very short period of time by the development of new catalytic systems with the employment of various noncovalent interactions. Moreover, significant advancements have occurred for aliphatic C(sp3)-H borylations as well as enantioselective borylations. In this review article, we aim to discuss and summarize the different approaches and findings related to the development of directed proximal ortho, distal meta/para, aliphatic (racemic and enantioselective) borylation reactions since 2014. Additionally, considering the C-H borylation reaction as one of the most important mainstream reactions, various applications of this C-H borylation reaction toward the synthesis of natural products, therapeutics, and applications in materials chemistry will be summarized in the last part of this review article.
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Affiliation(s)
- Ranjana Bisht
- Center of Bio-Medical Research, Division of Molecular Synthesis & Drug Discovery, SGPGIMS Campus, Raebareli Road, Lucknow 226014, Uttar Pradesh, India.
| | - Chabush Haldar
- Center of Bio-Medical Research, Division of Molecular Synthesis & Drug Discovery, SGPGIMS Campus, Raebareli Road, Lucknow 226014, Uttar Pradesh, India.
| | - Mirja Md Mahamudul Hassan
- Center of Bio-Medical Research, Division of Molecular Synthesis & Drug Discovery, SGPGIMS Campus, Raebareli Road, Lucknow 226014, Uttar Pradesh, India.
| | - Md Emdadul Hoque
- Center of Bio-Medical Research, Division of Molecular Synthesis & Drug Discovery, SGPGIMS Campus, Raebareli Road, Lucknow 226014, Uttar Pradesh, India.
| | - Jagriti Chaturvedi
- Center of Bio-Medical Research, Division of Molecular Synthesis & Drug Discovery, SGPGIMS Campus, Raebareli Road, Lucknow 226014, Uttar Pradesh, India.
| | - Buddhadeb Chattopadhyay
- Center of Bio-Medical Research, Division of Molecular Synthesis & Drug Discovery, SGPGIMS Campus, Raebareli Road, Lucknow 226014, Uttar Pradesh, India.
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10
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Prabagar B, Yang Y, Shi Z. Site-selective C-H functionalization to access the arene backbone of indoles and quinolines. Chem Soc Rev 2021; 50:11249-11269. [PMID: 34486584 DOI: 10.1039/d0cs00334d] [Citation(s) in RCA: 79] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The site-selective C-H bond functionalization of heteroarenes can eventually provide chemists with great techniques for editing and building complex molecular scaffolds. During the past decade, benzo-fused N-heterocycles such as indoles and quinolines have been among the most widely investigated organic templates. Early developments have led to site-selective C-H bond functionalization on the pyrrole and pyridine cores of indoles and quinolines; however, C-H functionalization on the benzenoid ring has remained a great challenge in catalysis. In this review, we elaborate on recent developments in the highly challenging functionalization of C-H bonds on the less-reactive benzenoid core of indoles and quinolines. These findings are mainly described as selective directing group assisted strategies, remote C-H functionalization techniques and their reaction mechanisms. The underlying principle in each strategy is elucidated, which aims to facilitate the design of a more advanced structure of heterocycles based on bioactive molecules, synthetic drugs, and material aspects. Moreover, the challenges and perspectives for catalytic C-H functionalization to access the arene backbone of indoles and quinolines are also proposed in the conclusion section.
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Affiliation(s)
- B Prabagar
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China.
| | - Youqing Yang
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China.
| | - Zhuangzhi Shi
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China.
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11
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Motokura K, Ding S, Usui K, Kong Y. Enhanced Catalysis Based on the Surface Environment of the Silica-Supported Metal Complex. ACS Catal 2021. [DOI: 10.1021/acscatal.1c03426] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Ken Motokura
- Department of Chemistry and Life Science, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8502, Japan
| | - Siming Ding
- Department of Chemistry and Life Science, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8502, Japan
| | - Kei Usui
- Department of Chemistry and Life Science, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8502, Japan
| | - Yuanyuan Kong
- Department of Chemistry and Life Science, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8502, Japan
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12
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Corio A, Gravier-Pelletier C, Busca P. Regioselective Functionalization of Quinolines through C-H Activation: A Comprehensive Review. Molecules 2021; 26:5467. [PMID: 34576936 PMCID: PMC8466797 DOI: 10.3390/molecules26185467] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Revised: 08/30/2021] [Accepted: 09/01/2021] [Indexed: 11/16/2022] Open
Abstract
Quinoline is a versatile heterocycle that is part of numerous natural products and countless drugs. During the last decades, this scaffold also became widely used as ligand in organometallic catalysis. Therefore, access to functionalized quinolines is of great importance and continuous efforts have been made to develop efficient and regioselective synthetic methods. In this regard, C-H functionalization through transition metal catalysis, which is nowadays the Graal of organic green chemistry, represents the most attractive strategy. We aim herein at providing a comprehensive review of methods that allow site-selective metal-catalyzed C-H functionalization of quinolines, or their quinoline N-oxides counterparts, with a specific focus on their scope and limitations, as well as mechanistic aspects if that accounts for the selectivity.
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Affiliation(s)
| | | | - Patricia Busca
- Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, UMR CNRS 8601, Université de Paris, 45 rue des Saints-Pères, 75006 Paris, France; (A.C.); (C.G.-P.)
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13
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Hu W, Zhang F, Chen C, Qi T, Shen Y, Qian G, Rong Z. Metal-free C8-H functionalization of quinoline N-oxides with ynamides. Chem Commun (Camb) 2021; 57:6995-6998. [PMID: 34159972 DOI: 10.1039/d1cc02138a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The metal-free C8-H functionalization of quinoline N-oxides with ynamides is unveiled for the first time by the intramolecular Friedel-Crafts-type reaction of quinolyl enolonium intermediates generated from Brønsted acid-catalyzed addition of quinoline N-oxides to ynamides. Various quinoline N-oxides and terminal ynamides prove to be suitable substrates for this method. A one-pot protocol was then developed for the metal-free direct C8-H functionalization of quinolines.
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Affiliation(s)
- Weican Hu
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, People's Republic of China.
| | - Feiyang Zhang
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, People's Republic of China.
| | - Chen Chen
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, People's Republic of China.
| | - Tianhang Qi
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, People's Republic of China.
| | - Yanlong Shen
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, People's Republic of China.
| | - Guoying Qian
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, People's Republic of China.
| | - Zhouting Rong
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, People's Republic of China.
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14
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Chattopadhyay B, Hassan MMM, Hoque ME, Dey S, Guria S, Roy B. Iridium-Catalyzed Site-Selective Borylation of 8-Arylquinolines. SYNTHESIS-STUTTGART 2021. [DOI: 10.1055/a-1506-3884] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
AbstractWe report a convenient method for the highly site-selective borylation of 8-arylquinoline. The reaction proceeds smoothly in the presence of a catalytic amount of [Ir(OMe)(cod)]2 and 2-phenylpyridine derived ligand using bis(pinacolato)diborane as the borylating agent. The reactions occur with high selectivity with many functional groups, providing a series of borylated 8-aryl quinolines with good to excellent yield and excellent selectivity. The borylated compounds formed in this method can be transformed into various important synthons by using known transformations.
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Affiliation(s)
- Buddhadeb Chattopadhyay
- Center of Bio-Medical Research, Division of Molecular Synthesis & Drug Discovery, SGPGIMS Campus
| | | | - Md Emdadul Hoque
- Center of Bio-Medical Research, Division of Molecular Synthesis & Drug Discovery, SGPGIMS Campus
| | - Sayan Dey
- Center of Bio-Medical Research, Division of Molecular Synthesis & Drug Discovery, SGPGIMS Campus
| | - Saikat Guria
- Center of Bio-Medical Research, Division of Molecular Synthesis & Drug Discovery, SGPGIMS Campus
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15
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Affiliation(s)
- Marin R. Auth
- Department of Chemistry and Biochemistry University of San Diego San Diego CA 92110 USA
| | - Kathryn A. McGarry
- Department of Chemistry University of Wisconsin-Stevens Point Stevens Point WI 54481 USA
| | - Timothy B. Clark
- Department of Chemistry and Biochemistry University of San Diego San Diego CA 92110 USA
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16
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Wang ZJ, Chen X, Wu L, Wong JJ, Liang Y, Zhao Y, Houk KN, Shi Z. Metal-Free Directed C-H Borylation of Pyrroles. Angew Chem Int Ed Engl 2021; 60:8500-8504. [PMID: 33449421 DOI: 10.1002/anie.202016573] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 01/12/2021] [Indexed: 01/08/2023]
Abstract
Robust strategies to enable the rapid construction of complex organoboronates in selective, practical, low-cost, and environmentally friendly modes remain conspicuously underdeveloped. Here, we develop a general strategy for the site-selective C-H borylation of pyrroles by using only BBr3 directed by pivaloyl groups, avoiding the use of any metal. The site-selectivity is generally dominated by chelation and electronic effects, thus forming diverse C2-borylated pyrroles against the steric effect. The formed products can readily engage in downstream transformations, enabling a step-economic process to access drugs such as Lipitor. DFT calculations (wB97X-D) demonstrate the preferred positional selectivity of this reaction.
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Affiliation(s)
- Zheng-Jun Wang
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China
| | - Xiangyang Chen
- Department of Chemistry and Biochemistry, University of California, Los Angeles, CA, 90095, USA
| | - Lei Wu
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China
| | - Jonathan J Wong
- Department of Chemistry and Biochemistry, University of California, Los Angeles, CA, 90095, USA
| | - Yong Liang
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China
| | - Yue Zhao
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China
| | - Kendall N Houk
- Department of Chemistry and Biochemistry, University of California, Los Angeles, CA, 90095, USA
| | - Zhuangzhi Shi
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China
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17
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Wang Z, Chen X, Wu L, Wong JJ, Liang Y, Zhao Y, Houk KN, Shi Z. Metal‐Free Directed C−H Borylation of Pyrroles. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202016573] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Zheng‐Jun Wang
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC) School of Chemistry and Chemical Engineering Nanjing University Nanjing 210093 China
| | - Xiangyang Chen
- Department of Chemistry and Biochemistry University of California Los Angeles CA 90095 USA
| | - Lei Wu
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC) School of Chemistry and Chemical Engineering Nanjing University Nanjing 210093 China
| | - Jonathan J. Wong
- Department of Chemistry and Biochemistry University of California Los Angeles CA 90095 USA
| | - Yong Liang
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC) School of Chemistry and Chemical Engineering Nanjing University Nanjing 210093 China
| | - Yue Zhao
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC) School of Chemistry and Chemical Engineering Nanjing University Nanjing 210093 China
| | - Kendall N. Houk
- Department of Chemistry and Biochemistry University of California Los Angeles CA 90095 USA
| | - Zhuangzhi Shi
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC) School of Chemistry and Chemical Engineering Nanjing University Nanjing 210093 China
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18
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Tian YM, Guo XN, Braunschweig H, Radius U, Marder TB. Photoinduced Borylation for the Synthesis of Organoboron Compounds. Chem Rev 2021; 121:3561-3597. [PMID: 33596057 DOI: 10.1021/acs.chemrev.0c01236] [Citation(s) in RCA: 137] [Impact Index Per Article: 45.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Organoboron compounds have important synthetic value and can be applied in numerous transformations. The development of practical and convenient ways to synthesize boronate esters has thus attracted significant interest. Photoinduced borylations originated from stoichiometric reactions of alkanes and arenes with well-defined metal-boryl complexes. Now, photoredox-initiated borylations, catalyzed by either transition metal or organic photocatalysts, and photochemical borylations with high efficiency have become a burgeoning area of research. In this Focus Review, we summarize research on photoinduced borylations, especially emphasizing recent developments and trends. This includes the photoinduced borylation of arenes, alkanes, aryl/alkyl halides, activated carboxylic acids, amines, alcohols, and so on based on transition metal catalysis, metal-free organocatalysis, and direct photochemical activation. We focus on reaction mechanisms involving single-electron transfer, triplet-energy transfer, and other radical processes.
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Affiliation(s)
- Ya-Ming Tian
- Institute for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Xiao-Ning Guo
- Institute for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Holger Braunschweig
- Institute for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Udo Radius
- Institute for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Todd B Marder
- Institute for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
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19
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Wright JS, Scott PJH, Steel PG. Iridium-Catalysed C-H Borylation of Heteroarenes: Balancing Steric and Electronic Regiocontrol. Angew Chem Int Ed Engl 2021; 60:2796-2821. [PMID: 32202024 PMCID: PMC7894576 DOI: 10.1002/anie.202001520] [Citation(s) in RCA: 68] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Revised: 03/09/2020] [Indexed: 12/19/2022]
Abstract
The iridium-catalysed borylation of aromatic C-H bonds has become the preferred method for the synthesis of aromatic organoboron compounds. The reaction is highly efficient, tolerant of a broad range of substituents and can be applied to both carbocyclic and heterocyclic substrates. The regioselectivity of C-H activation is dominated by steric considerations and there have been considerable efforts to develop more selective processes for less constrained substrates. However, most of these have focused on benzenoid-type substrates and in contrast, heteroarenes remain much desired but more challenging substrates with the position and/or nature of the heteroatom(s) significantly affecting reactivity and regioselectivity. This review will survey the borylation of heteroarenes, focusing on the influence of steric and electronic effects on regiochemical outcome and, by linking to current mechanistic understandings, will provide insights to what is currently possible and where further developments are required.
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Affiliation(s)
- Jay S. Wright
- Department of ChemistryUniversity of DurhamScience Laboratories, South Road DurhamDurhamDH1 3LEUK
- Department of RadiologyUniversity of MichiganAnn ArborMichiganUSA
| | | | - Patrick G. Steel
- Department of ChemistryUniversity of DurhamScience Laboratories, South Road DurhamDurhamDH1 3LEUK
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20
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Jiao J, Nie W, Song P, Li P. A new air-stable Si,S-chelating ligand for Ir-catalyzed directed ortho C-H borylation. Org Biomol Chem 2021; 19:355-359. [PMID: 33315038 DOI: 10.1039/d0ob02335c] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A new air-stable Si,S-chelating ligand has been developed and used in an iridium-catalyzed ortho C-H borylation reaction with a broad substrate scope. This study provides the first example of using a sulfur-containing ligand in the catalytic C-H borylation process. It provides a rapid, efficient, and economical method for the preparation of organoboron compounds.
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Affiliation(s)
- Jiao Jiao
- School of Chemistry, Xi'an Jiaotong University, Xi'an, China. and Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, Xi'an Jiaotong University, Xi'an, China
| | - Wenzheng Nie
- School of Chemistry, Xi'an Jiaotong University, Xi'an, China.
| | - Peidong Song
- Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, China.
| | - Pengfei Li
- Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, China. and Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, Xi'an Jiaotong University, Xi'an, China
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21
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Wright JS, Scott PJH, Steel PG. Iridium‐katalysierte C‐H‐Borylierung von Heteroarenen: Eine Balance zwischen sterischer and elektronischer Regiokontrolle. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202001520] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Jay S. Wright
- Department of Chemistry University of Durham Science Laboratories, South Road Durham Durham DH1 3LE Großbritannien
- Department of Radiology University of Michigan Ann Arbor Michigan USA
| | - Peter J. H. Scott
- Department of Radiology University of Michigan Ann Arbor Michigan USA
| | - Patrick G. Steel
- Department of Chemistry University of Durham Science Laboratories, South Road Durham Durham DH1 3LE Großbritannien
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22
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Lou SJ, Zhang L, Luo Y, Nishiura M, Luo G, Luo Y, Hou Z. Regiodivergent C-H Alkylation of Quinolines with Alkenes by Half-Sandwich Rare-Earth Catalysts. J Am Chem Soc 2020; 142:18128-18137. [PMID: 32985182 DOI: 10.1021/jacs.0c08362] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The regiodivergent catalysis of C-H alkylation with alkenes is of great interest and importance but has remained hardly explored to date. We report herein the first regiodivergent C-H alkylation of quinolines with alkenes by half-sandwich rare-earth catalysts. The regiodivergence was achieved by fine-tuning the metal/ligand combination or steric and electronic properties of the catalysts. The use of the C5Me5-ligated scandium catalyst Sc-3 for the reaction of quinolines with styrenes and that of the C5Me4H-ligated yttrium catalyst Y-2 for the reaction with aliphatic olefins exclusively afforded the corresponding C8-H alkylation products, thus constituting the first example of direct C8-H alkylation of neutral quinolines. In contrast, the Sc-3-catalyzed reaction of 2-arylquinolines with aliphatic olefins and the Y-2-catalyzed reaction with styrenes selectively gave the 2-aryl o-C-H alkylation products. On the basis of the catalyst/substrate-controlled regiodivergence, the sequential regiospecific dialkylation of quinolines with two different alkenes has also been achieved. DFT studies revealed that the C-H activation of 2-phenylquinoline at both the C8 position and an ortho position of the 2-phenyl substituent was possible, and these two types of initially formed C-H activation products were interconvertible through the coordination and C-H activation of another molecule of quinoline. The regioselectivity for the C-H alkylation reactions was governed not only by the ease of the initial formation of the C-H activation products but also by the energy barriers for their interconversions, as well as by the energy barriers or steric and electronic influences in the subsequent alkene insertion processes. This work has not only constituted an efficient protocol for the selective synthesis of diversified quinoline derivatives but also offered unprecedented insights into the C-H activation and transformation of quinolines and may help in the design of more efficient, selective, or complementary catalysts.
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Affiliation(s)
- Shao-Jie Lou
- Advanced Catalysis Research Group, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Liang Zhang
- Advanced Catalysis Research Group, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.,Organometallic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Yong Luo
- Organometallic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Masayoshi Nishiura
- Advanced Catalysis Research Group, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.,Organometallic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Gen Luo
- Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, People's Republic of China
| | - Yi Luo
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, People's Republic of China
| | - Zhaomin Hou
- Advanced Catalysis Research Group, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.,Organometallic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.,State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, People's Republic of China
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23
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Dhiman AK, Thakur A, Kumar R, Sharma U. Rhodium‐Catalyzed Selective C−H Bond Functionalization of Quinolines. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000341] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Ankit K. Dhiman
- Chemical Technology Division and AcSIR CSIR-Institute of Himalayan Bioresource Technology Palampur India
| | - Ankita Thakur
- Chemical Technology Division and AcSIR CSIR-Institute of Himalayan Bioresource Technology Palampur India
| | - Rakesh Kumar
- Chemical Technology Division and AcSIR CSIR-Institute of Himalayan Bioresource Technology Palampur India
| | - Upendra Sharma
- Chemical Technology Division and AcSIR CSIR-Institute of Himalayan Bioresource Technology Palampur India
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24
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Rauch F, Krebs J, Günther J, Friedrich A, Hähnel M, Krummenacher I, Braunschweig H, Finze M, Marder TB. Electronically Driven Regioselective Iridium-Catalyzed C-H Borylation of Donor-π-Acceptor Chromophores Containing Triarylboron Acceptors. Chemistry 2020; 26:10626-10633. [PMID: 32510684 PMCID: PMC7497074 DOI: 10.1002/chem.202002348] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 06/05/2020] [Indexed: 12/11/2022]
Abstract
We observed a surprisingly high electronically driven regioselectivity for the iridium-catalyzed C-H borylation of donor-π-acceptor (D-π-A) systems with diphenylamino (1) or carbazolyl (2) moieties as the donor, bis(2,6-bis(trifluoromethyl)phenyl)boryl (B(F Xyl)2 ) as the acceptor, and 1,4-phenylene as the π-bridge. Under our conditions, borylation was observed only at the sterically least encumbered para-positions of the acceptor group. As boronate esters are versatile building blocks for organic synthesis (C-C coupling, functional group transformations) the C-H borylation represents a simple potential method for post-functionalization by which electronic or other properties of D-π-A systems can be fine-tuned for specific applications. The photophysical and electrochemical properties of the borylated (1-(Bpin)2 ) and unborylated (1) diphenylamino-substituted D-π-A systems were investigated. Interestingly, the borylated derivative exhibits coordination of THF to the boronate ester moieties, influencing the photophysical properties and exemplifying the non-innocence of boronate esters.
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Affiliation(s)
- Florian Rauch
- Institut für Anorganische Chemie and Institute, for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Johannes Krebs
- Institut für Anorganische Chemie and Institute, for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Julian Günther
- Institut für Anorganische Chemie and Institute, for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Alexandra Friedrich
- Institut für Anorganische Chemie and Institute, for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Martin Hähnel
- Institut für Anorganische Chemie and Institute, for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Ivo Krummenacher
- Institut für Anorganische Chemie and Institute, for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Holger Braunschweig
- Institut für Anorganische Chemie and Institute, for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Maik Finze
- Institut für Anorganische Chemie and Institute, for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Todd B. Marder
- Institut für Anorganische Chemie and Institute, for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
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25
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26
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Shi H, Lu Y, Weng J, Bay KL, Chen X, Tanaka K, Verma P, Houk KN, Yu JQ. Differentiation and functionalization of remote C-H bonds in adjacent positions. Nat Chem 2020; 12:399-404. [PMID: 32123338 PMCID: PMC7155936 DOI: 10.1038/s41557-020-0424-5] [Citation(s) in RCA: 69] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Accepted: 01/21/2020] [Indexed: 12/01/2022]
Abstract
Site-selective functionalization of C–H bonds will ultimately afford chemists transformative tools for editing and constructing complex molecular architectures. Towards this goal, developing strategies to activate C–H bonds that are distal from a functional group is essential. In this context, distinguishing remote C–H bonds on adjacent carbon atoms is an extraordinary challenge due to the lack of electronic or steric bias between the two positions. Herein, we report the design of a catalytic system leveraging a remote directing template and a transient norbornene mediator to selectively activate a previously inaccessible remote C–H bond that is one bond further away. The generality of this approach has been demonstrated with a range of heterocycles, including a complex anti-leukemia agent, and hydrocinnamic acid substrates.
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Affiliation(s)
- Hang Shi
- The Scripps Research Institute, La Jolla, CA, USA
| | - Yi Lu
- The Scripps Research Institute, La Jolla, CA, USA
| | - Jiang Weng
- The Scripps Research Institute, La Jolla, CA, USA
| | - Katherine L Bay
- Department of Chemistry and Biochemistry, University of California, Los Angeles, CA, USA
| | - Xiangyang Chen
- Department of Chemistry and Biochemistry, University of California, Los Angeles, CA, USA
| | - Keita Tanaka
- The Scripps Research Institute, La Jolla, CA, USA
| | - Pritha Verma
- The Scripps Research Institute, La Jolla, CA, USA
| | - Kendall N Houk
- Department of Chemistry and Biochemistry, University of California, Los Angeles, CA, USA.
| | - Jin-Quan Yu
- The Scripps Research Institute, La Jolla, CA, USA.
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27
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Shanahan RM, Hickey A, Bateman LM, Light ME, McGlacken GP. One-Pot Cross-Coupling/C-H Functionalization Reactions: Quinoline as a Substrate and Ligand through N-Pd Interaction. J Org Chem 2020; 85:2585-2596. [PMID: 31971802 DOI: 10.1021/acs.joc.9b03321] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Herein, we report a one-pot process that marries mechanistically distinct, traditional cross-coupling reactions with C-H functionalization using the same precatalyst. The reactions proceed in yields of up to 95%, in air, and require no extraneous ligand. The reactions are thought to be facilitated by harnessing the substrate quinoline as an N-ligand, and evidence of the palladium-quinoline interaction is provided by 1H-15N HMBC NMR spectroscopy and X-ray crystallographic structures. Application of the methodology is demonstrated by the quick formation of fluorescent, π-extended frameworks.
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Affiliation(s)
- Rachel M Shanahan
- School of Chemistry, Analytical and Biological Chemistry Research Facility (ABCRF) , University College Cork , Cork T12 YN60 , Ireland
| | - Aobha Hickey
- School of Chemistry, Analytical and Biological Chemistry Research Facility (ABCRF) , University College Cork , Cork T12 YN60 , Ireland
| | - Lorraine M Bateman
- School of Chemistry, Analytical and Biological Chemistry Research Facility (ABCRF) , University College Cork , Cork T12 YN60 , Ireland.,Synthesis and Solid State Pharmaceutical Centre (SSPC) , University College Cork , Cork T12 YN60 , Ireland.,School of Pharmacy , University College Cork , Cork T12 YN60 , Ireland
| | - Mark E Light
- Department of Chemistry , University of Southampton , Southampton SO17 1BJ , United Kingdom
| | - Gerard P McGlacken
- School of Chemistry, Analytical and Biological Chemistry Research Facility (ABCRF) , University College Cork , Cork T12 YN60 , Ireland.,Synthesis and Solid State Pharmaceutical Centre (SSPC) , University College Cork , Cork T12 YN60 , Ireland
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28
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Shally, Althagafi I, Singhal D, Panwar R, Shaw R, Elagamy A, Pratap R. Base-promoted regioselective synthesis of 1,2,3,4-terahydroquinolines and quinolines from N-boc-3-piperidone. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.130695] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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29
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Kim J, Kim S, Kim D, Chang S. Ru-Catalyzed Deoxygenative Regioselective C8–H Arylation of Quinoline N-Oxides. J Org Chem 2019; 84:13150-13158. [DOI: 10.1021/acs.joc.9b01548] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Jinwoo Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
- Center for Catalytic Hydrocarbon Functionalization, Institute for Basic Science (IBS), Daejeon 34141, South Korea
| | - Suhyeon Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
- Center for Catalytic Hydrocarbon Functionalization, Institute for Basic Science (IBS), Daejeon 34141, South Korea
| | - Dongwook Kim
- Center for Catalytic Hydrocarbon Functionalization, Institute for Basic Science (IBS), Daejeon 34141, South Korea
| | - Sukbok Chang
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
- Center for Catalytic Hydrocarbon Functionalization, Institute for Basic Science (IBS), Daejeon 34141, South Korea
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30
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Wright SE, Richardson‐Solorzano S, Stewart TN, Miller CD, Morris KC, Daley CJA, Clark TB. Accessing Ambiphilic Phosphine Boronates through C−H Borylation by an Unforeseen Cationic Iridium Complex. Angew Chem Int Ed Engl 2019; 58:2834-2838. [DOI: 10.1002/anie.201812857] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Indexed: 12/20/2022]
Affiliation(s)
- Shawn E. Wright
- Department of Chemistry & BiochemistryUniversity of San Diego 5998 Alcalá Park San Diego CA 92110 USA
| | | | - Tiffany N. Stewart
- Department of Chemistry & BiochemistryUniversity of San Diego 5998 Alcalá Park San Diego CA 92110 USA
| | - Christopher D. Miller
- Department of Chemistry & BiochemistryUniversity of San Diego 5998 Alcalá Park San Diego CA 92110 USA
| | - Kelsey C. Morris
- Department of Chemistry & BiochemistryUniversity of San Diego 5998 Alcalá Park San Diego CA 92110 USA
| | - Christopher J. A. Daley
- Department of Chemistry & BiochemistryUniversity of San Diego 5998 Alcalá Park San Diego CA 92110 USA
| | - Timothy B. Clark
- Department of Chemistry & BiochemistryUniversity of San Diego 5998 Alcalá Park San Diego CA 92110 USA
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31
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Wright SE, Richardson‐Solorzano S, Stewart TN, Miller CD, Morris KC, Daley CJA, Clark TB. Accessing Ambiphilic Phosphine Boronates through C−H Borylation by an Unforeseen Cationic Iridium Complex. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201812857] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Shawn E. Wright
- Department of Chemistry & Biochemistry University of San Diego 5998 Alcalá Park San Diego CA 92110 USA
| | | | - Tiffany N. Stewart
- Department of Chemistry & Biochemistry University of San Diego 5998 Alcalá Park San Diego CA 92110 USA
| | - Christopher D. Miller
- Department of Chemistry & Biochemistry University of San Diego 5998 Alcalá Park San Diego CA 92110 USA
| | - Kelsey C. Morris
- Department of Chemistry & Biochemistry University of San Diego 5998 Alcalá Park San Diego CA 92110 USA
| | - Christopher J. A. Daley
- Department of Chemistry & Biochemistry University of San Diego 5998 Alcalá Park San Diego CA 92110 USA
| | - Timothy B. Clark
- Department of Chemistry & Biochemistry University of San Diego 5998 Alcalá Park San Diego CA 92110 USA
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32
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The role of Si in Ir(SiNN) catalyst and chemoselectivity of dehydrogenative borylation over hydroborylation: A theoretical study. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.09.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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33
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Amide Effects in C−H Activation: Noncovalent Interactions with L-Shaped Ligand for meta
Borylation of Aromatic Amides. Angew Chem Int Ed Engl 2018; 57:15762-15766. [DOI: 10.1002/anie.201809929] [Citation(s) in RCA: 95] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Indexed: 11/07/2022]
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34
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Bisht R, Hoque ME, Chattopadhyay B. Amide Effects in C−H Activation: Noncovalent Interactions with L-Shaped Ligand for meta
Borylation of Aromatic Amides. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201809929] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ranjana Bisht
- Division of Molecular Synthesis & Drug Discovery, Centre of Bio-Medical Research (CBMR); SGPGIMS Campus; Raebareli Road Lucknow 226014 U.P. India
| | - Md Emdadul Hoque
- Division of Molecular Synthesis & Drug Discovery, Centre of Bio-Medical Research (CBMR); SGPGIMS Campus; Raebareli Road Lucknow 226014 U.P. India
| | - Buddhadeb Chattopadhyay
- Division of Molecular Synthesis & Drug Discovery, Centre of Bio-Medical Research (CBMR); SGPGIMS Campus; Raebareli Road Lucknow 226014 U.P. India
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35
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Maeda Y, Sato M, Okada S, Murata M. Ruthenium-catalyzed nitrogen-directed ortho C H borylation of aromatic imines with pinacolborane. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.05.038] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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36
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Murai M, Nishinaka N, Takai K. Iridium-Catalyzed Sequential Silylation and Borylation of Heteroarenes Based on Regioselective C-H Bond Activation. Angew Chem Int Ed Engl 2018; 57:5843-5847. [PMID: 29573532 DOI: 10.1002/anie.201801229] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 03/06/2018] [Indexed: 12/30/2022]
Abstract
An iridium-catalyzed regioselective sequential silylation and borylation of heteroarenes was developed, which represents a rare example of unsymmetrical intermolecular C-H bond difunctionalization through the introduction of two different functionalities during a one-pot transformation. Although the substrate scope for the dehydrogenative silylation of heteroarenes has been limited mainly to electron-rich five-membered rings, the current reaction proceeds with both electron-rich and electron-deficient heteroarenes with the aid of heteroatom-directing C-H bond activation. The regioselectivity of the second borylation was controlled by both steric factors and the electronic effect of the silyl group installed in the first step. In combination with the classic cross-coupling reaction, this method provides rapid access to multisubstituted heteroarenes.
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Affiliation(s)
- Masahito Murai
- Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama, 700-8530, Japan
| | - Naoki Nishinaka
- Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama, 700-8530, Japan
| | - Kazuhiko Takai
- Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama, 700-8530, Japan
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37
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Murai M, Nishinaka N, Takai K. Iridium-Catalyzed Sequential Silylation and Borylation of Heteroarenes Based on Regioselective C−H Bond Activation. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201801229] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Masahito Murai
- Division of Applied Chemistry, Graduate School of Natural Science and Technology; Okayama University; 3-1-1 Tsushimanaka, Kita-ku Okayama 700-8530 Japan
| | - Naoki Nishinaka
- Division of Applied Chemistry, Graduate School of Natural Science and Technology; Okayama University; 3-1-1 Tsushimanaka, Kita-ku Okayama 700-8530 Japan
| | - Kazuhiko Takai
- Division of Applied Chemistry, Graduate School of Natural Science and Technology; Okayama University; 3-1-1 Tsushimanaka, Kita-ku Okayama 700-8530 Japan
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38
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Li DY, Huang ZL, Liu PN. Heterobicyclic Core Retained Hydroarylations through C-H Activation: Synthesis of Epibatidine Analogues. Org Lett 2018; 20:2028-2032. [PMID: 29558151 DOI: 10.1021/acs.orglett.8b00571] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The heterobicyclic core retained hydroarylation of oxa/azabenzonorbornadienes with quinoline N-oxides has been achieved under rhodium catalysis, giving quinoline N-oxide substituted heterobicyclic structures with excellent regioselectivity and in good yields. As the first example of the direct introduction of quinoline N-oxides onto heterobicyclic structures, the strained heterobicyclic core was well retained in the reaction. The products could be successfully transformed into a series of useful compounds, including epibatidine analogues.
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Affiliation(s)
- Deng-Yuan Li
- Shanghai Key Laboratory of Functional Materials Chemistry, Key Lab for Advanced Materials and School of Chemistry & Molecular Engineering , East China University of Science & Technology , Meilong Road 130 , Shanghai 200237 , China
| | - Zheng-Lu Huang
- Shanghai Key Laboratory of Functional Materials Chemistry, Key Lab for Advanced Materials and School of Chemistry & Molecular Engineering , East China University of Science & Technology , Meilong Road 130 , Shanghai 200237 , China
| | - Pei-Nian Liu
- Shanghai Key Laboratory of Functional Materials Chemistry, Key Lab for Advanced Materials and School of Chemistry & Molecular Engineering , East China University of Science & Technology , Meilong Road 130 , Shanghai 200237 , China
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39
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Reyes RL, Harada T, Taniguchi T, Monde K, Iwai T, Sawamura M. Enantioselective Rh- or Ir-catalyzed Directed C(sp3)–H Borylation with Phosphoramidite Chiral Ligands. CHEM LETT 2017. [DOI: 10.1246/cl.170853] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Ronald L. Reyes
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, Hokkaido 060-0810
| | - Tomoya Harada
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, Hokkaido 060-0810
| | - Tohru Taniguchi
- Frontier Research Center for Advanced Material and Life Science, Faculty of Advanced Life Science, Hokkaido University, Sapporo, Hokkaido 001-0021
| | - Kenji Monde
- Frontier Research Center for Advanced Material and Life Science, Faculty of Advanced Life Science, Hokkaido University, Sapporo, Hokkaido 001-0021
| | - Tomohiro Iwai
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, Hokkaido 060-0810
| | - Masaya Sawamura
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, Hokkaido 060-0810
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40
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Yan G, Huang D, Wu X. Recent Advances in C-B Bond Formation through a Free Radical Pathway. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201701030] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Guobing Yan
- Department of Chemistry; Lishui University; No. 1, Xueyuan Road Lishui City 323000 People's Republic of China
| | - Dayun Huang
- Department of Chemistry; Lishui University; No. 1, Xueyuan Road Lishui City 323000 People's Republic of China
| | - Xiangmei Wu
- Department of Chemistry; Lishui University; No. 1, Xueyuan Road Lishui City 323000 People's Republic of China
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41
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Mietke T, Cruchter T, Winterling E, Tripp M, Harms K, Meggers E. Suzuki Cross-Coupling for Post-Complexation Derivatization of Non-Racemic Bis-Cyclometalated Iridium(III) Complexes. Chemistry 2017; 23:12363-12371. [DOI: 10.1002/chem.201701758] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Indexed: 01/21/2023]
Affiliation(s)
- Thomas Mietke
- Fachbereich Chemie; Philipps-Universität Marburg; Hans-Meerwein-Straße 4 35043 Marburg Germany
| | - Thomas Cruchter
- Fachbereich Chemie; Philipps-Universität Marburg; Hans-Meerwein-Straße 4 35043 Marburg Germany
| | - Erik Winterling
- Fachbereich Chemie; Philipps-Universität Marburg; Hans-Meerwein-Straße 4 35043 Marburg Germany
| | - Matthias Tripp
- Fachbereich Chemie; Philipps-Universität Marburg; Hans-Meerwein-Straße 4 35043 Marburg Germany
| | - Klaus Harms
- Fachbereich Chemie; Philipps-Universität Marburg; Hans-Meerwein-Straße 4 35043 Marburg Germany
| | - Eric Meggers
- Fachbereich Chemie; Philipps-Universität Marburg; Hans-Meerwein-Straße 4 35043 Marburg Germany
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42
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Davies GHM, Jouffroy M, Sherafat F, Saeednia B, Howshall C, Molander GA. Regioselective Diversification of 2,1-Borazaronaphthalenes: Unlocking Isosteric Space via C-H Activation. J Org Chem 2017; 82:8072-8084. [PMID: 28714683 PMCID: PMC5548096 DOI: 10.1021/acs.joc.7b01331] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
![]()
Methods for the regioselective C–H
borylation and subsequent
cross-coupling of the 2,1-borazaronaphthalene core are reported. Azaborines
are dependent on B–N/C=C isosterism when employed in
strategies for developing diverse heterocyclic scaffolds. Although
2,1-borazaronaphthalene is closely related to naphthalene in terms
of structure, the argument is made that the former has electronic
similarities to indole. Based on that premise, iridium-mediated C–H
activation has enabled facile installation of a versatile, nucleophilic
coupling handle at a previously inaccessible site of 2,1-borazaronaphthalenes.
A variety of substituted 2,1-borazaronaphthalene cores can be successfully
borylated and further cross-coupled in a facile manner to yield diverse
C(8)-substituted 2,1-borazaronaphthalenes.
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Affiliation(s)
- Geraint H M Davies
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania , 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Matthieu Jouffroy
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania , 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Fatemeh Sherafat
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania , 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States.,School of Chemistry, College of Science, University of Tehran , PO Box 14155 6455 Tehran, Iran
| | - Borna Saeednia
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania , 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States.,Laboratory of Organic Synthesis and Natural Products, Department of Chemistry, Sharif University of Technology , Azadi Street, PO Box 111559516 Tehran, Iran
| | - Casey Howshall
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania , 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Gary A Molander
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania , 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
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43
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Arockiam PB, Guillemard L, Wencel-Delord J. Regiodivergent Visible Light-Induced C-H Functionalization of Quinolines at C-5 and C-8 under Metal-, Photosensitizer- and Oxidant-Free Conditions. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700471] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Percia Beatrice Arockiam
- Laboratoire de Chimie Moléculaire (UMR CNRS 7509); Université de Strasbourg, ECPM; 25 rue Becquerel 67087 Strasbourg France
| | - Lucas Guillemard
- Laboratoire de Chimie Moléculaire (UMR CNRS 7509); Université de Strasbourg, ECPM; 25 rue Becquerel 67087 Strasbourg France
| | - Joanna Wencel-Delord
- Laboratoire de Chimie Moléculaire (UMR CNRS 7509); Université de Strasbourg, ECPM; 25 rue Becquerel 67087 Strasbourg France
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44
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Hoque ME, Bisht R, Haldar C, Chattopadhyay B. Noncovalent Interactions in Ir-Catalyzed C-H Activation: L-Shaped Ligand for Para-Selective Borylation of Aromatic Esters. J Am Chem Soc 2017; 139:7745-7748. [PMID: 28537744 DOI: 10.1021/jacs.7b04490] [Citation(s) in RCA: 176] [Impact Index Per Article: 25.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
An efficient strategy for the para-selective borylation of aromatic esters is described. For achieving high para-selectivity, a new catalytic system has been developed modifying the core structure of the bipyridine. It has been proposed that the L-shaped ligand is essential to recognize the functionality of the oxygen atom of the ester carbonyl group via noncovalent interaction, which provides an unprecedented controlling factor for para-selective C-H activation/borylation.
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Affiliation(s)
- Md Emdadul Hoque
- Center of Bio-Medical Research, Division of Molecular Synthesis & Drug Discovery, SGPGIMS Campus , Raebareli Road, Lucknow 226014, Uttar Pradesh, India
| | - Ranjana Bisht
- Center of Bio-Medical Research, Division of Molecular Synthesis & Drug Discovery, SGPGIMS Campus , Raebareli Road, Lucknow 226014, Uttar Pradesh, India
| | - Chabush Haldar
- Center of Bio-Medical Research, Division of Molecular Synthesis & Drug Discovery, SGPGIMS Campus , Raebareli Road, Lucknow 226014, Uttar Pradesh, India
| | - Buddhadeb Chattopadhyay
- Center of Bio-Medical Research, Division of Molecular Synthesis & Drug Discovery, SGPGIMS Campus , Raebareli Road, Lucknow 226014, Uttar Pradesh, India
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45
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Qi X, Jiang L, Zhou C, Peng J, Wu X. Convenient and General Zinc-Catalyzed Borylation of Aryl Diazonium Salts and Aryltriazenes under Mild Conditions. ChemistryOpen 2017. [PMID: 28638765 PMCID: PMC5474665 DOI: 10.1002/open.201700036] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
A convenient and general zinc‐catalyzed borylation of aryl diazonium salts and aryltriazenes has been developed. With bis‐ (pinacolato)diboron as the borylation reagent, aryldiazonium tetrafluoroborate salts and aryltriazenes were transformed into the corresponding arylboronates in moderate to excellent yields under mild conditions. As a convenient and practical methodology, no additional ligands, base, or any other additives are required here.
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Affiliation(s)
- Xinxin Qi
- Department of ChemistryZhejiang Sci-Tech UniversityXiasha CampusHangzhou310018P.R. China
| | - Li‐Bing Jiang
- Department of ChemistryZhejiang Sci-Tech UniversityXiasha CampusHangzhou310018P.R. China
| | - Chao Zhou
- Department of ChemistryZhejiang Sci-Tech UniversityXiasha CampusHangzhou310018P.R. China
| | - Jin‐Bao Peng
- Department of ChemistryZhejiang Sci-Tech UniversityXiasha CampusHangzhou310018P.R. China
| | - Xiao‐Feng Wu
- Department of ChemistryZhejiang Sci-Tech UniversityXiasha CampusHangzhou310018P.R. China
- Leibniz-Institut für Katalyse e.V. an derUniversität RostockAlbert-Einstein-Straße 29a18059RostockGermany
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46
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Xuan Q, Zhao C, Song Q. Umpolung of protons from H2O: a metal-free chemoselective reduction of carbonyl compounds via B2pin2/H2O systems. Org Biomol Chem 2017; 15:5140-5144. [DOI: 10.1039/c7ob00820a] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
H2O is routinely described as a proton donor, however, in the presence of diboron compounds, the umpolung reaction of H2O under metal-free conditions was successfully developed, which could afford hydride species, leading to a highly efficient and chemoselective reduction of CO bonds.
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Affiliation(s)
- Qingqing Xuan
- Institute of Next Generation Matter Transformation
- Huaqiao University
- Xiamen
- China
| | - Cong Zhao
- Institute of Next Generation Matter Transformation
- Huaqiao University
- Xiamen
- China
| | - Qiuling Song
- Institute of Next Generation Matter Transformation
- Huaqiao University
- Xiamen
- China
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47
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Yoshimura A, Takamachi Y, Mihara K, Saeki T, Kawaguchi SI, Han LB, Nomoto A, Ogawa A. Photoinduced metal-free diboration of alkynes in the presence of organophosphine catalysts. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.06.040] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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48
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Sahoo H, Mandal A, Selvakumar J, Baidya M. Remote C-H Selenylation of 8-Amidoquinolines via Copper-Catalyzed Radical Cross-Coupling. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600772] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Harekrishna Sahoo
- Department of Chemistry; Indian Institute of Technology Madras; 600036 Chennai Tamil Nadu India
| | - Anup Mandal
- Department of Chemistry; Indian Institute of Technology Madras; 600036 Chennai Tamil Nadu India
| | - Jayaraman Selvakumar
- Department of Chemistry; Indian Institute of Technology Madras; 600036 Chennai Tamil Nadu India
| | - Mahiuddin Baidya
- Department of Chemistry; Indian Institute of Technology Madras; 600036 Chennai Tamil Nadu India
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49
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Chen X, Cui X, Wu Y. C8-Selective Acylation of Quinoline N-Oxides with α-Oxocarboxylic Acids via Palladium-Catalyzed Regioselective C–H Bond Activation. Org Lett 2016; 18:3722-5. [DOI: 10.1021/acs.orglett.6b01746] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xiaopei Chen
- Department
of Chemistry, Henan Key Laboratory of Chemical Biology and Organic
Chemistry, Key Laboratory of Applied Chemistry of Henan Universities, Zhengzhou University, Zhengzhou 450052, P. R. China
| | - Xiuling Cui
- Department
of Chemistry, Henan Key Laboratory of Chemical Biology and Organic
Chemistry, Key Laboratory of Applied Chemistry of Henan Universities, Zhengzhou University, Zhengzhou 450052, P. R. China
- Xiamen Key Laboratory of Ocean and Gene Drugs, School of Biomedical Sciences, Institute of Molecular Medicine, Huaqiao University & Engineering Research Centre of Molecular Medicine of Chinese Education Ministry, Xiamen, Fujian 361021, P. R. China
| | - Yangjie Wu
- Department
of Chemistry, Henan Key Laboratory of Chemical Biology and Organic
Chemistry, Key Laboratory of Applied Chemistry of Henan Universities, Zhengzhou University, Zhengzhou 450052, P. R. China
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50
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Sahoo H, Ramakrishna I, Baidya M. Functionalization of Quinolines through Copper-Catalyzed Regioselective Halogenation Reaction. ChemistrySelect 2016. [DOI: 10.1002/slct.201600532] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Harekrishna Sahoo
- Department of Chemistry; Indian Institute of Technology Madras; Chennai 600036 Tamil Nadu India
| | - Isai Ramakrishna
- Department of Chemistry; Indian Institute of Technology Madras; Chennai 600036 Tamil Nadu India
| | - Mahiuddin Baidya
- Department of Chemistry; Indian Institute of Technology Madras; Chennai 600036 Tamil Nadu India
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