301
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Chao T, Su ZH, Yen KW, Wu MJ, Chu JH. Synthesis of Dibenzosuberones Bearing an Isoxazole Group via Palladium-Catalyzed Intramolecular C-H/C-Br Bond Cross-Coupling of Ortho-Aroylated 3,5-Diarylisoxazoles. J Org Chem 2020; 85:5559-5569. [PMID: 32212605 DOI: 10.1021/acs.joc.0c00346] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A facile and efficient synthetic methodology for preparing dibenzosuberones via a C-H bond activation strategy is presented. The ortho-aroylated 3,5-diarylisoxazole was employed as the starting substrate to undergo palladium-catalyzed intramolecular C-H/C-Br bond cross-coupling to produce a variety of dibenzosuberones bearing an isoxazole group in 24 to >99% 1H NMR yields. The dibenzosuberone structure was further confirmed by X-ray crystallography. The developed methodology exhibits very good functional group tolerance. In addition, a rational mechanism was presented for describing the reaction process. For the prepared dibenzosuberone, the use of Mo(CO)6 as the catalyst can easily transform the isoxazole ring into the β-aminoenone group. Finally, the structure of the anticipated ring-opening product, dibenzosuberenone, bearing a β-amino-α-ketone group was secured by X-ray crystallography.
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Affiliation(s)
- Tung Chao
- Department of Chemistry, National Sun Yat-sen University, Kaohsiung 804, Taiwan
| | - Zhe-Hong Su
- Department of Applied Science, National Taitung University, Taitung 95092, Taiwan
| | - Ko-Wang Yen
- Department of Applied Science, National Taitung University, Taitung 95092, Taiwan
| | - Ming-Jung Wu
- Department of Chemistry, National Sun Yat-sen University, Kaohsiung 804, Taiwan
| | - Jean-Ho Chu
- Department of Applied Science, National Taitung University, Taitung 95092, Taiwan
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302
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Hwang SH, Choi TL. Iridium-Catalyzed Direct C-H Amidation Producing Multicolor Fluorescent Molecules Emitting Blue-to-Red Light and White Light. Org Lett 2020; 22:2935-2940. [PMID: 32243176 DOI: 10.1021/acs.orglett.0c00618] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
We report a powerful strategy, iridium-catalyzed direct C-H amidation (DCA) for synthesizing various fluorescent sulfonamides that emit light over the entire visible spectrum with excellent efficiency (up to 99% yields). By controlling electronic characters of the resulting sulfonamides, a wide range of blue-to-red emissions was predictably obtained via an excited-state intramolecular proton-transfer process. Furthermore, we even succeeded in a white-light generation, highlighting that this DCA is an excellent synthetic method to prepare a library of fluorophores.
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Affiliation(s)
- Soon-Hyeok Hwang
- Department of Chemistry, Seoul National University, Seoul 08826, Korea
| | - Tae-Lim Choi
- Department of Chemistry, Seoul National University, Seoul 08826, Korea
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303
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Yoshino T, Satake S, Matsunaga S. Diverse Approaches for Enantioselective C-H Functionalization Reactions Using Group 9 Cp x M III Catalysts. Chemistry 2020; 26:7346-7357. [PMID: 31994236 DOI: 10.1002/chem.201905417] [Citation(s) in RCA: 133] [Impact Index Per Article: 33.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2019] [Indexed: 12/27/2022]
Abstract
Transition-metal-catalyzed C-H functionalization reactions with Cp*MIII catalysts (M=Co, Rh, Ir) have found a wide variety of applications in organic synthesis. Albeit the intrinsic difficulties in achieving catalytic stereocontrol using these catalysts due to their lack of additional coordination sites for external chiral ligands and the conformational flexibility of the Cp ligand, catalytic enantioselective C-H functionalization reactions using the Group 9 metal triad with Cp-type ligands have been intensively studied since 2012. In this minireview, the progress in these reactions according to the type of the chiral catalyst used are summarized and discussed. The development of chiral Cpx ligands the metal complexes thereof, artificial metalloenzymes, chiral carboxylate-assisted enantioselective C-H activations, enantioselective alkylations assisted by chiral carboxylic acids or chiral sulfonates, and chiral transient directing groups are discussed.
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Affiliation(s)
- Tatsuhiko Yoshino
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita-ku, Sapporo, 060-0812, Japan
| | - Shun Satake
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita-ku, Sapporo, 060-0812, Japan
| | - Shigeki Matsunaga
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita-ku, Sapporo, 060-0812, Japan
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304
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Yan X, Zhao P, Liang H, Xie H, Jiang J, Gou S, Wang J. Rhodium(III)-Catalyzed Asymmetric C–H Activation of N-Methoxybenzamide with Quinone and Its Application in the Asymmetric Synthesis of a Dihydrolycoricidine Analogue. Org Lett 2020; 22:3219-3223. [DOI: 10.1021/acs.orglett.0c01002] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xiaoqiang Yan
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, P. R. China
| | - Peng Zhao
- School of Chemistry and Chemical Engineering, State Key Lab of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, P. R. China
| | - Hao Liang
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, P. R. China
| | - Hui Xie
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, P. R. China
| | - Jijun Jiang
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, P. R. China
| | - Shaohua Gou
- School of Chemistry and Chemical Engineering, State Key Lab of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, P. R. China
| | - Jun Wang
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, P. R. China
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305
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Sun M, Xu Z, Li W, Yang L, You H, Yu D, Fang F, Wang Y, Liu Z. Free‐Radical‐Promoted Alkenylation of C(
sp
3
)−H Bond in Chloroalkane with Cinnamic Acid and
β
‐Nitrostyrene. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000215] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Minzhi Sun
- College of PharmacyNanjing University of Chinese Medicine Nanjing 210023 People's Republic of China
| | - Zhengbao Xu
- Shandong Provincial Research Center for Bioinformatic Engineering and Technique, Zibo Key Laboratory of New Drug Development of Neurodegenerative diseases, School of Life SciencesShandong University of Technology Zibo 255000, Shandong People's Republic of China
| | - Wenjie Li
- College of PharmacyNanjing University of Chinese Medicine Nanjing 210023 People's Republic of China
| | - Le Yang
- College of PharmacyNanjing University of Chinese Medicine Nanjing 210023 People's Republic of China
| | - Huichao You
- College of PharmacyNanjing University of Chinese Medicine Nanjing 210023 People's Republic of China
| | - Dan Yu
- College of PharmacyNanjing University of Chinese Medicine Nanjing 210023 People's Republic of China
| | - Fang Fang
- College of PharmacyNanjing University of Chinese Medicine Nanjing 210023 People's Republic of China
| | - Yaxin Wang
- College of PharmacyNanjing University of Chinese Medicine Nanjing 210023 People's Republic of China
| | - Zhong‐Quan Liu
- College of PharmacyNanjing University of Chinese Medicine Nanjing 210023 People's Republic of China
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306
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Valero M, Kruissink T, Blass J, Weck R, Güssregen S, Plowright AT, Derdau V. C-H Functionalization-Prediction of Selectivity in Iridium(I)-Catalyzed Hydrogen Isotope Exchange Competition Reactions. Angew Chem Int Ed Engl 2020; 59:5626-5631. [PMID: 31917506 PMCID: PMC7232431 DOI: 10.1002/anie.201914220] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Indexed: 12/22/2022]
Abstract
An assessment of the C-H activation catalyst [(COD)Ir(IMes)(PPh3 )]PF6 (COD=1,5-cyclooctadiene, IMes=1,3-bis(2,4,6-trimethylphenyl)imidazol-2-ylidene) in the deuteration of phenyl rings containing different functional directing groups is divulged. Competition experiments have revealed a clear order of the directing groups in the hydrogen isotope exchange (HIE) with an iridium (I) catalyst. Through DFT calculations the iridium-substrate coordination complex has been identified to be the main trigger for reactivity and selectivity in the competition situation with two or more directing groups. We postulate that the competition concept found in this HIE reaction can be used to explain regioselectivities in other transition-metal-catalyzed functionalization reactions of complex drug-type molecules as long as a C-H activation mechanism is involved.
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Affiliation(s)
- Mégane Valero
- Sanofi-Aventis (Deutschland) GmbH, R&DIntegrated Drug DiscoveryIndustriepark Höchst65926Frankfurt am MainGermany
| | - Thomas Kruissink
- Sanofi-Aventis (Deutschland) GmbH, R&DIntegrated Drug DiscoveryIndustriepark Höchst65926Frankfurt am MainGermany
| | - Jennifer Blass
- Sanofi-Aventis (Deutschland) GmbH, R&DIntegrated Drug DiscoveryIndustriepark Höchst65926Frankfurt am MainGermany
| | - Remo Weck
- Sanofi-Aventis (Deutschland) GmbH, R&DIntegrated Drug DiscoveryIndustriepark Höchst65926Frankfurt am MainGermany
| | - Stefan Güssregen
- Sanofi-Aventis (Deutschland) GmbH, R&DIntegrated Drug DiscoveryIndustriepark Höchst65926Frankfurt am MainGermany
| | - Alleyn T. Plowright
- Sanofi-Aventis (Deutschland) GmbH, R&DIntegrated Drug DiscoveryIndustriepark Höchst65926Frankfurt am MainGermany
| | - Volker Derdau
- Sanofi-Aventis (Deutschland) GmbH, R&DIntegrated Drug DiscoveryIndustriepark Höchst65926Frankfurt am MainGermany
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307
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Lin Y, Sun H, Yang H, Lai Y, Hou K, Liu Y. Aqueous Palladium‐Catalyzed Direct Arylation Polymerization of 2‐Bromothiophene Derivatives. Macromol Rapid Commun 2020; 41:e2000021. [DOI: 10.1002/marc.202000021] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Revised: 03/04/2020] [Accepted: 03/05/2020] [Indexed: 12/13/2022]
Affiliation(s)
- Yu‐Jen Lin
- Institute of Polymer Science and EngineeringNational Taiwan University Taipei 10617 Taiwan
| | - Han‐Sheng Sun
- Institute of Polymer Science and EngineeringNational Taiwan University Taipei 10617 Taiwan
| | - Hau‐Ren Yang
- Institute of Polymer Science and EngineeringNational Taiwan University Taipei 10617 Taiwan
| | - Yu‐Ying Lai
- Institute of Polymer Science and EngineeringNational Taiwan University Taipei 10617 Taiwan
| | - Kai‐Yuan Hou
- Institute of Polymer Science and EngineeringNational Taiwan University Taipei 10617 Taiwan
| | - Yi‐Hung Liu
- Instrumentation CenterNational Taiwan University Taipei 10617 Taiwan
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308
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Lu MZ, Ding X, Shao C, Hu Z, Luo H, Zhi S, Hu H, Kan Y, Loh TP. Direct Hiyama Cross-Coupling of (Hetero)arylsilanes with C(sp 2)-H Bonds Enabled by Cobalt Catalysis. Org Lett 2020; 22:2663-2668. [PMID: 32182081 DOI: 10.1021/acs.orglett.0c00631] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report a chelation-assisted C-H arylation of various indoles with sterically and electronically diverse (hetero)arylsilanes enabled by cost-effective Cp*-free cobalt catalysis. Key to the success of this strategy is the judicious choice of copper(II) fluoride as a bifunctional sliane activator and catalyst reoxidant. This methodology features a broad substrate scope and good functional group compatibility. The synthetic versatility of this protocol has been highlighted by the gram-scale synthesis and late-stage diversification of biologically active molecules.
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Affiliation(s)
- Ming-Zhu Lu
- Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huaian 223300, China
| | - Xin Ding
- Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huaian 223300, China
| | - Changdong Shao
- Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huaian 223300, China
| | - Zhengsong Hu
- Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huaian 223300, China
| | - Haiqing Luo
- Department of Chemistry & Chemical Engineering, Gannan Normal University, Ganzhou 341000, China
| | - Sanjun Zhi
- Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huaian 223300, China
| | - Huayou Hu
- Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huaian 223300, China
| | - Yuhe Kan
- Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huaian 223300, China
| | - Teck-Peng Loh
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
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309
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Liu W, Babl T, Röther A, Reiser O, Davies HML. Functionalization of Piperidine Derivatives for the Site-Selective and Stereoselective Synthesis of Positional Analogues of Methylphenidate. Chemistry 2020; 26:4236-4241. [PMID: 31873946 PMCID: PMC7187323 DOI: 10.1002/chem.201905773] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Indexed: 12/13/2022]
Abstract
Rhodium‐catalyzed C−H insertions and cyclopropanations of donor/acceptor carbenes have been used for the synthesis of positional analogues of methylphenidate. The site selectivity is controlled by the catalyst and the amine protecting group. C−H functionalization of N‐Boc‐piperidine using Rh2(R‐TCPTAD)4, or N‐brosyl‐piperidine using Rh2(R‐TPPTTL)4 generated 2‐substitited analogues. In contrast, when N‐α‐oxoarylacetyl‐piperidines were used in combination with Rh2(S‐2‐Cl‐5‐BrTPCP)4, the C−H functionalization produced 4‐susbstiuted analogues. Finally, the 3‐substituted analogues were prepared indirectly by cyclopropanation of N‐Boc‐tetrahydropyridine followed by reductive regio‐ and stereoselective ring‐opening of the cyclopropanes.
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Affiliation(s)
- Wenbin Liu
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, GA, 30322, USA
| | - Tobias Babl
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, GA, 30322, USA.,Institute of Organic Chemistry, University of Regensburg, Universitätsstrasse 31, 93053, Regensburg, Germany
| | - Alexander Röther
- Institute of Organic Chemistry, University of Regensburg, Universitätsstrasse 31, 93053, Regensburg, Germany
| | - Oliver Reiser
- Institute of Organic Chemistry, University of Regensburg, Universitätsstrasse 31, 93053, Regensburg, Germany
| | - Huw M L Davies
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, GA, 30322, USA
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310
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Abrams DJ, Davies HML, Sorensen EJ. Donor-Acceptor-Acceptor 1,3-Bisdiazo Compounds: An Exploration of Synthesis and Stepwise Reactivity. Org Lett 2020; 22:1791-1795. [PMID: 32105078 DOI: 10.1021/acs.orglett.0c00103] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Metal carbenes, derived from the decomposition of diazo compounds, are valued for their capacity to perform a variety of transformations. A unique class of acyclic, bis-diazo compounds, the donor-acceptor-acceptor 1,3-bisdiazo compounds, are described herein. These compounds are available from acyclic β-keto esters and especially reactive at the donor-acceptor diazo unit. These bisdiazo compounds react smoothly with rhodium acetate and alcohols to give monodiazo, cyclic orthoesters, presumably through the capture of a transient oxonium ylide.
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Affiliation(s)
- Dylan J Abrams
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Huw M L Davies
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Erik J Sorensen
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
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311
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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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312
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Tan JF, Bormann CT, Severin K, Cramer N. Alkynyl Triazenes as Fluoroalkyne Surrogates: Regioselective Access to 4-Fluoro-2-pyridones by a Rh(III)-Catalyzed C–H Activation–Lossen Rearrangement–Wallach Reaction. ACS Catal 2020. [DOI: 10.1021/acscatal.0c00499] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Jin-Fay Tan
- Laboratory of Asymmetric Catalysis and Synthesis, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Carl Thomas Bormann
- Laboratory of Supramolecular Chemistry, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Kay Severin
- Laboratory of Supramolecular Chemistry, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Nicolai Cramer
- Laboratory of Asymmetric Catalysis and Synthesis, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
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313
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Yong JY, Vu HM, Li XQ, Gong AJ. Palladium (0)-catalyzed C(sp)-H oxygenation with carboxylic acids. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.130969] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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314
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Yuan S, Chang J, Yu B. Construction of Biologically Important Biaryl Scaffolds through Direct C–H Bond Activation: Advances and Prospects. Top Curr Chem (Cham) 2020; 378:23. [DOI: 10.1007/s41061-020-0285-9] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Accepted: 01/21/2020] [Indexed: 11/30/2022]
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315
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Chen R, Yang S, Zhang Y. Recent progress in the total synthesis of marine brominated sesquiterpene aplydactone. Org Biomol Chem 2020; 18:1036-1045. [PMID: 31961356 DOI: 10.1039/c9ob02642h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Aplydactone is a brominated sesquiterpene isolated from the sea hare Aplysia dactylomela. Structurally, it features a complex cage-like skeleton containing a highly strained tricyclic-[4.2.0.03,8]-4-decanone system. Its unique structural features have fascinated many synthetic chemists. In this review, the synthetic efforts towards aplydactone in the last five years are summarized in two categories including nonbiomimetic synthesis and biomimetic synthesis based on the core synthetic strategy. These syntheses set a classical and instructive example for the syntheses of other marine natural products.
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Affiliation(s)
- Renzhi Chen
- Department of Chemistry and Key Laboratory of Chemical Biology of Fujian Province, iChEM, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China.
| | - Sihan Yang
- Department of Chemistry and Key Laboratory of Chemical Biology of Fujian Province, iChEM, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China.
| | - Yandong Zhang
- Department of Chemistry and Key Laboratory of Chemical Biology of Fujian Province, iChEM, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China.
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316
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Barysevich MV, Laktsevich-Iskryk MV, Krech AV, Zhabinskii VN, Khripach VA, Hurski AL. Palladium-Catalyzed 2-(Neopentylsulfinyl)aniline Directed C-H Acetoxylation and Alkenylation of Arylacetamides. European J Org Chem 2020. [DOI: 10.1002/ejoc.201901646] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Maryia V. Barysevich
- Institute of Bioorganic Chemistry; National Academy of Sciences of Belarus; Kuprevich str. 5/2 220141 Minsk Belarus
| | | | - Anastasiya V. Krech
- Institute of Bioorganic Chemistry; National Academy of Sciences of Belarus; Kuprevich str. 5/2 220141 Minsk Belarus
| | - Vladimir N. Zhabinskii
- Institute of Bioorganic Chemistry; National Academy of Sciences of Belarus; Kuprevich str. 5/2 220141 Minsk Belarus
| | - Vladimir A. Khripach
- Institute of Bioorganic Chemistry; National Academy of Sciences of Belarus; Kuprevich str. 5/2 220141 Minsk Belarus
| | - Alaksiej L. Hurski
- Institute of Bioorganic Chemistry; National Academy of Sciences of Belarus; Kuprevich str. 5/2 220141 Minsk Belarus
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317
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Porey S, Zhang X, Bhowmick S, Kumar Singh V, Guin S, Paton RS, Maiti D. Alkyne Linchpin Strategy for Drug:Pharmacophore Conjugation: Experimental and Computational Realization of a Meta-Selective Inverse Sonogashira Coupling. J Am Chem Soc 2020; 142:3762-3774. [PMID: 31910623 DOI: 10.1021/jacs.9b10646] [Citation(s) in RCA: 82] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The late-stage functionalization (LSF) of pharmaceutical and agrochemical compounds by the site-selective activation of C-H bonds provides access to diverse structural analogs and expands synthetically-accessible chemical space. We report a C-H functionalization LSF strategy that hinges on the use of an alkyne linchpin to assemble conjugates of sp2-rich marketed pharmaceuticals and agrochemicals with sp3-rich 3D fragments and natural products. This is accomplished through a template-assisted inverse Sonogashira reaction that displays high levels of selectivity for the meta position. This protocol is also amenable to distal structural modifications of α-amino acids. The transformation of alkyne functionality to other functional groups further highlights the applicative potential. Computational and experimental mechanistic studies shed light on the detailed mechanism. Turnover-limiting 1,2-migratory insertion of the bromoalkyne coupling partner occurs after relatively fast C-H activation. While this insertion occurs unselectively, regioconvergence results from one of the adducts undergoing a 1,2-trialkylsilyl migration to form the alkynylated product. A heterobimetallic Pd-Ag transition structure is essential for product formation in the β-bromide elimination step.
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Affiliation(s)
- Sandip Porey
- Department of Chemistry , Indian Institute of Technology Bombay , Powai, Mumbai 400076 , India
| | - Xinglong Zhang
- Chemistry Research Laboratory , University of Oxford , Mansfield Road , Oxford OX1 3TA , United Kingdom
| | - Suman Bhowmick
- Department of Chemistry , Indian Institute of Technology Bombay , Powai, Mumbai 400076 , India
| | - Vikas Kumar Singh
- Department of Chemistry , Indian Institute of Technology Bombay , Powai, Mumbai 400076 , India
| | - Srimanta Guin
- Department of Chemistry , Indian Institute of Technology Bombay , Powai, Mumbai 400076 , India
| | - Robert S Paton
- Chemistry Research Laboratory , University of Oxford , Mansfield Road , Oxford OX1 3TA , United Kingdom.,Department of Chemistry , Colorado State University , Fort Collins , Colorado 80523 , United States
| | - Debabrata Maiti
- Department of Chemistry , Indian Institute of Technology Bombay , Powai, Mumbai 400076 , India.,Tokyo Tech World Research Hub Initiative (WRHI), Laboratory for Chemistry and Life Science , Tokyo Institute of Technology , Tokyo 152-8550 , Japan
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318
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Valero M, Kruissink T, Blass J, Weck R, Güssregen S, Plowright AT, Derdau V. C−H Functionalization—Prediction of Selectivity in Iridium(I)‐Catalyzed Hydrogen Isotope Exchange Competition Reactions. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201914220] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Mégane Valero
- Sanofi-Aventis (Deutschland) GmbH, R&D Integrated Drug Discovery Industriepark Höchst 65926 Frankfurt am Main Germany
| | - Thomas Kruissink
- Sanofi-Aventis (Deutschland) GmbH, R&D Integrated Drug Discovery Industriepark Höchst 65926 Frankfurt am Main Germany
| | - Jennifer Blass
- Sanofi-Aventis (Deutschland) GmbH, R&D Integrated Drug Discovery Industriepark Höchst 65926 Frankfurt am Main Germany
| | - Remo Weck
- Sanofi-Aventis (Deutschland) GmbH, R&D Integrated Drug Discovery Industriepark Höchst 65926 Frankfurt am Main Germany
| | - Stefan Güssregen
- Sanofi-Aventis (Deutschland) GmbH, R&D Integrated Drug Discovery Industriepark Höchst 65926 Frankfurt am Main Germany
| | - Alleyn T. Plowright
- Sanofi-Aventis (Deutschland) GmbH, R&D Integrated Drug Discovery Industriepark Höchst 65926 Frankfurt am Main Germany
| | - Volker Derdau
- Sanofi-Aventis (Deutschland) GmbH, R&D Integrated Drug Discovery Industriepark Höchst 65926 Frankfurt am Main Germany
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319
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Kommagalla Y, Ando S, Chatani N. Rh(III)-Catalyzed Reaction of α-Carbonyl Sulfoxonium Ylides and Alkenes: Synthesis of Indanones via [4 + 1] Cycloaddition. Org Lett 2020; 22:1375-1379. [DOI: 10.1021/acs.orglett.9b04664] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Yadagiri Kommagalla
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Shunsuke Ando
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Naoto Chatani
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
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320
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Wu M, Chu J. Directing group assists in transition metal‐catalyzed site‐selective C‐H bond activation/transformations. J CHIN CHEM SOC-TAIP 2020. [DOI: 10.1002/jccs.201900471] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Ming‐Jung Wu
- Department of ChemistryNational Sun Yat‐sen University Kaohsiung Taiwan
| | - Jean‐Ho Chu
- Department of Applied ScienceNational Taitung University Taitung Taiwan
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321
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Trinh KH, Tran PH, Nguyen TT, Doan SH, Le M, Nguyen TT, Phan NT. Direct oxidative C(sp
3
)─H/C(sp
2
)─H coupling reaction using recyclable Sr‐doped LaCoO
3
perovskite catalyst. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5515] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Khang H. Trinh
- Faculty of Chemical EngineeringHCMC University of Technology VNU‐HCM, 268 Ly Thuong Kiet, District 10 Ho Chi Minh City Vietnam
| | - Phuong H. Tran
- Faculty of Chemical EngineeringHCMC University of Technology VNU‐HCM, 268 Ly Thuong Kiet, District 10 Ho Chi Minh City Vietnam
| | - Thanh T. Nguyen
- Faculty of Chemical EngineeringHCMC University of Technology VNU‐HCM, 268 Ly Thuong Kiet, District 10 Ho Chi Minh City Vietnam
| | - Son H. Doan
- Faculty of Chemical EngineeringHCMC University of Technology VNU‐HCM, 268 Ly Thuong Kiet, District 10 Ho Chi Minh City Vietnam
| | - Minh‐Vien Le
- Faculty of Chemical EngineeringHCMC University of Technology VNU‐HCM, 268 Ly Thuong Kiet, District 10 Ho Chi Minh City Vietnam
| | - Tung T. Nguyen
- Faculty of Chemical EngineeringHCMC University of Technology VNU‐HCM, 268 Ly Thuong Kiet, District 10 Ho Chi Minh City Vietnam
| | - Nam T.S. Phan
- Faculty of Chemical EngineeringHCMC University of Technology VNU‐HCM, 268 Ly Thuong Kiet, District 10 Ho Chi Minh City Vietnam
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322
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Liao Y, Ran Y, Liu G, Liu P, Liu X. Transition-metal-free radical relay cyclization of vinyl azides with 1,4-dihydropyridines involving a 1,5-hydrogen-atom transfer: access to α-tetralone scaffolds. Org Chem Front 2020. [DOI: 10.1039/d0qo01042a] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The remote C(sp3)–H functionalization enabled by a radical-mediated 1,5-hydrogen-atom transfer (HAT) process using vinyl azides and 1,4-dihydropyridines as precursors has been described.
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Affiliation(s)
- Yangzhen Liao
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province
- Generic Drug Research Center of Guizhou Province
- School of Pharmacy
- Zunyi Medical University
- Zunyi 563000
| | - Yu Ran
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province
- Generic Drug Research Center of Guizhou Province
- School of Pharmacy
- Zunyi Medical University
- Zunyi 563000
| | - Guijun Liu
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province
- Generic Drug Research Center of Guizhou Province
- School of Pharmacy
- Zunyi Medical University
- Zunyi 563000
| | - Peijun Liu
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province
- Generic Drug Research Center of Guizhou Province
- School of Pharmacy
- Zunyi Medical University
- Zunyi 563000
| | - Xiaozu Liu
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province
- Generic Drug Research Center of Guizhou Province
- School of Pharmacy
- Zunyi Medical University
- Zunyi 563000
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323
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Shankar M, Rit RK, Sau S, Mukherjee K, Gandon V, Sahoo AK. Double annulation of ortho- and peri-C–H bonds of fused (hetero)arenes to unusual oxepino-pyridines. Chem Sci 2020. [DOI: 10.1039/d0sc01373k] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Direct difunctionalization of chemically distinct ortho- and peri-C–H bonds of fused hetero(arenes) is illustrated through an unusual one-pot domino {[4 + 2] & [5 + 2]} double annulation with alkynes for the first time.
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Affiliation(s)
- Majji Shankar
- School of Chemistry
- University of Hyderabad
- Hyderabad-500046
- India
| | - Raja K. Rit
- School of Chemistry
- University of Hyderabad
- Hyderabad-500046
- India
| | - Somratan Sau
- School of Chemistry
- University of Hyderabad
- Hyderabad-500046
- India
| | | | - Vincent Gandon
- Institut de Chimie Moléculaire et des Matériaux d'Orsay
- CNRS UMR 8182
- Université; Paris-Sud
- Université; Paris-Saclay
- 91405 Orsay Cedex
| | - Akhila K. Sahoo
- School of Chemistry
- University of Hyderabad
- Hyderabad-500046
- India
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324
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Li Y, Pan GA, Luo MJ, Li JH. Radical-mediated oxidative annulations of 1,n-enynes involving C–H functionalization. Chem Commun (Camb) 2020; 56:6907-6924. [DOI: 10.1039/d0cc02335c] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Recent progress in oxidative annulations of 1,n-enynes involving C–H functionalization is summarized.
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Affiliation(s)
- Yang Li
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle
- Nanchang Hangkong University
- Nanchang 330063
- China
| | - Gao-Ang Pan
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle
- Nanchang Hangkong University
- Nanchang 330063
- China
| | - Mu-Jia Luo
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle
- Nanchang Hangkong University
- Nanchang 330063
- China
- State Key Laboratory of Chemo/Biosensing and Chemometrics
| | - Jin-Heng Li
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle
- Nanchang Hangkong University
- Nanchang 330063
- China
- State Key Laboratory of Chemo/Biosensing and Chemometrics
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325
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Wootton TL, Porter JA, Grewal KS, Chirila PG, Forbes S, Coles SJ, Horton PN, Hamilton A, Whiteoak CJ. Merging Cu-catalysed C–H functionalisation and intramolecular annulations: computational and experimental studies on an expedient construction of complex fused heterocycles. Org Chem Front 2020. [DOI: 10.1039/d0qo00283f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A copper-catalysed protocol for the synthesis of fused dihydrobenzofuran-isoquinolone compounds through an intramolecular annulation of readily accessible benzamide substrates is reported, along with a full DFT study into the mechanism.
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Affiliation(s)
- Timothy L. Wootton
- Biomolecular Sciences Research Centre (BMRC) and Department of Biosciences and Chemistry
- Faculty of Health and Wellbeing
- Sheffield Hallam University
- Sheffield
- UK
| | - Jack A. Porter
- Biomolecular Sciences Research Centre (BMRC) and Department of Biosciences and Chemistry
- Faculty of Health and Wellbeing
- Sheffield Hallam University
- Sheffield
- UK
| | - Karmjit S. Grewal
- Biomolecular Sciences Research Centre (BMRC) and Department of Biosciences and Chemistry
- Faculty of Health and Wellbeing
- Sheffield Hallam University
- Sheffield
- UK
| | - Paula G. Chirila
- Biomolecular Sciences Research Centre (BMRC) and Department of Biosciences and Chemistry
- Faculty of Health and Wellbeing
- Sheffield Hallam University
- Sheffield
- UK
| | - Sarah Forbes
- Biomolecular Sciences Research Centre (BMRC) and Department of Biosciences and Chemistry
- Faculty of Health and Wellbeing
- Sheffield Hallam University
- Sheffield
- UK
| | - Simon J. Coles
- UK National Crystallographic Service
- Chemistry
- Faculty of Natural and Environmental Sciences
- University of Southampton
- Southampton
| | - Peter N. Horton
- UK National Crystallographic Service
- Chemistry
- Faculty of Natural and Environmental Sciences
- University of Southampton
- Southampton
| | - Alex Hamilton
- Biomolecular Sciences Research Centre (BMRC) and Department of Biosciences and Chemistry
- Faculty of Health and Wellbeing
- Sheffield Hallam University
- Sheffield
- UK
| | - Christopher J. Whiteoak
- Biomolecular Sciences Research Centre (BMRC) and Department of Biosciences and Chemistry
- Faculty of Health and Wellbeing
- Sheffield Hallam University
- Sheffield
- UK
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326
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Ghosh P, Ganguly B, Das S. C–H functionalization of quinazolinones by transition metal catalysis. Org Biomol Chem 2020; 18:4497-4518. [DOI: 10.1039/d0ob00742k] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Quinazolinone and its derivatives are an important class of heterocyclic scaffolds in pharmaceuticals and natural products. This review provides the recent research advances in the transition metal catalyzed selective C–H bond functionalization of quinazolinone.
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Affiliation(s)
- Prasanjit Ghosh
- Department of Chemistry
- University of North Bengal
- Darjeeling – 734013
- India
| | - Bhaskar Ganguly
- Department of Chemistry
- University of North Bengal
- Darjeeling – 734013
- India
| | - Sajal Das
- Department of Chemistry
- University of North Bengal
- Darjeeling – 734013
- India
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327
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Schendera E, Villinger A, Brasholz M. Photoinduced iodine-mediated tandem dehydrogenative Povarov cyclisation/C–H oxygenation reactions. Org Biomol Chem 2020; 18:6912-6915. [DOI: 10.1039/d0ob01494j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Visible light and iodine mediate dehydrogenative imine [4+2]-cycloaddition/C–H oxygenation reactions to furnish highly functionalised 3-quinolones under metal-free conditions.
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Affiliation(s)
- Eva Schendera
- University of Rostock
- Institute of Chemistry
- 18055 Rostock
- Germany
| | | | - Malte Brasholz
- University of Rostock
- Institute of Chemistry
- 18055 Rostock
- Germany
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328
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Bagdi AK, Hajra A. Visible light promoted C–H functionalization of imidazoheterocycles. Org Biomol Chem 2020; 18:2611-2631. [DOI: 10.1039/d0ob00246a] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The present review summarizes the visible light mediated direct C–H functionalizations of pharmacologically active imidazo[1,2-a]pyridines and other related heterocycles.
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Affiliation(s)
| | - Alakananda Hajra
- Department of Chemistry
- Visva-Bharati (A Central University)
- Santiniketan 731235
- India
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329
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Ghosh B, Banerjee A, Paul A. Understanding the Role of Solvents and Spin-Orbit Coupling in an Oxygen-Assisted S N 2-Type Oxidative Transmetalation Reaction. Chemistry 2019; 25:16606-16616. [PMID: 31625633 DOI: 10.1002/chem.201903281] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Revised: 10/18/2019] [Indexed: 01/24/2023]
Abstract
The aerial oxidation of PdII to PdIV has emerged as an integral component of sustainable catalytic C-H functionalization processes. However, a proper understanding of the factors that control the viability of this oxidative process remains elusive. An investigation of the intricate mechanism of the transmetalation reaction of the aerial oxidative transformation of [(Me3 tacn)PdII Me2 ] (Me3 tacn=N,N',N''-trimethyl-1,4,7-triazacyclononane) to [(Me3 tacn)PdIV Me3 ]+ has been conducted by using DFT, along with multireference methods, such as second-order n-electron valence-state perturbation theory (NEVPT2) with complete active space self-consistent field theory (CASSCF). The present endeavor predicts that the thermodynamics and kinetics of the oxygen activation step are primarily dictated by the polarity of the solvents, which determine the amount of charge transfer to the oxygen molecule from the PdII center. Additionally, it is observed that the presence of a protic solvent has a significant effect on the spin-orbit coupling term at the minimum energy crossing point of the triplet and singlet surfaces. Moreover, it is shown that the intermetal ligand-transfer phenomenon is an important instance of an oxygen-assisted SN 2 reaction.
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Affiliation(s)
- Boyli Ghosh
- School of Chemical Science, Indian Association for the Cultivation of Science, 2A & 2B, Raja S.C. Mullick Road, Kolkata, 700032, India
| | - Ambar Banerjee
- Department of Organic Chemistry, Weizmann Institute of Science, Kimmelman 26, 7610001, Rehovot, Israel
| | - Ankan Paul
- School of Chemical Science, Indian Association for the Cultivation of Science, 2A & 2B, Raja S.C. Mullick Road, Kolkata, 700032, India
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330
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Kumar R, Sharma R, Kumar R, Sharma U. Cp*Rh(III)-Catalyzed Regioselective C(sp3)–H Methylation of 8-Methylquinolines with Organoborons. Org Lett 2019; 22:305-309. [DOI: 10.1021/acs.orglett.9b04331] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rakesh Kumar
- Natural Product Chemistry and Process Development Division and AcSIR, CSIR-IHBT, Palampur 176061, India
| | - Ritika Sharma
- Natural Product Chemistry and Process Development Division and AcSIR, CSIR-IHBT, Palampur 176061, India
| | - Rohit Kumar
- Natural Product Chemistry and Process Development Division and AcSIR, CSIR-IHBT, Palampur 176061, India
| | - Upendra Sharma
- Natural Product Chemistry and Process Development Division and AcSIR, CSIR-IHBT, Palampur 176061, India
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331
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Kaur P, Kumar V, Kumar R. Recent advances in decarboxylative C-C bond formation using direct or in situ generated alkenyl acids. CATALYSIS REVIEWS 2019. [DOI: 10.1080/01614940.2019.1700736] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Pavneet Kaur
- Laboratory of Organic Chemistry, Department of Chemistry, Central University of Punjab, Bathinda, India
| | - Vinod Kumar
- Laboratory of Organic and Medicinal Chemistry, Department of Pharmaceutical Sciences and Natural Products, Central University of Punjab, Bathinda, India
| | - Rakesh Kumar
- Laboratory of Organic Chemistry, Department of Chemistry, Central University of Punjab, Bathinda, India
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332
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Bian M, Ma L, Wu M, Wu L, Gao H, Yi W, Zhang C, Zhou Z. Rh(III)-Catalyzed Redox-Neutral [4+2] Annulation for Direct Assembly of 3-Acyl Isoquinolin-1(2H)-ones as Potent Antitumor Agents. Chempluschem 2019; 85:405-410. [PMID: 32118370 DOI: 10.1002/cplu.201900616] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 11/13/2019] [Indexed: 12/20/2022]
Abstract
By virtue of an efficient rhodium(III)-catalyzed redox-neutral C-H activation/ring-opening of a strained ring/[4+2] annulation cascade of N-methoxybenzamides with propargyl cycloalkanols, diverse 3-acyl isoquinolin-1(2H)-ones were directly obtained in good yields and with excellent functional group compatibility. Additionally, their antitumor activities against various human cancer cells including HepG2, A549, MCF-7 and SH-SY5Y were evaluated and the action mechanism of the selected compound was also investigated in vitro. The results revealed that these products possessed a potent efficacy, by inhibiting proliferation and inducing apoptosis in a time-dependent and dose-dependent manner, suggesting that such compounds can serve as promising candidates for anti lung cancer drug discovery.
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Affiliation(s)
- Mengyao Bian
- Guangzhou Municipal and Guangdong Provincial Key Laboratory of Protein Modification and Degradation & Molecular Target and Clinical Pharmacology State Key Laboratory of Respiratory Disease School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University Guangzhou, Guangdong, 511436, P. R. China
| | - Lei Ma
- Guangzhou Municipal and Guangdong Provincial Key Laboratory of Protein Modification and Degradation & Molecular Target and Clinical Pharmacology State Key Laboratory of Respiratory Disease School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University Guangzhou, Guangdong, 511436, P. R. China
| | - Min Wu
- Guangzhou Municipal and Guangdong Provincial Key Laboratory of Protein Modification and Degradation & Molecular Target and Clinical Pharmacology State Key Laboratory of Respiratory Disease School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University Guangzhou, Guangdong, 511436, P. R. China
| | - Liexin Wu
- Guangzhou Municipal and Guangdong Provincial Key Laboratory of Protein Modification and Degradation & Molecular Target and Clinical Pharmacology State Key Laboratory of Respiratory Disease School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University Guangzhou, Guangdong, 511436, P. R. China
| | - Hui Gao
- Guangzhou Municipal and Guangdong Provincial Key Laboratory of Protein Modification and Degradation & Molecular Target and Clinical Pharmacology State Key Laboratory of Respiratory Disease School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University Guangzhou, Guangdong, 511436, P. R. China
| | - Wei Yi
- Guangzhou Municipal and Guangdong Provincial Key Laboratory of Protein Modification and Degradation & Molecular Target and Clinical Pharmacology State Key Laboratory of Respiratory Disease School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University Guangzhou, Guangdong, 511436, P. R. China
| | - Chao Zhang
- Guangzhou Municipal and Guangdong Provincial Key Laboratory of Protein Modification and Degradation & Molecular Target and Clinical Pharmacology State Key Laboratory of Respiratory Disease School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University Guangzhou, Guangdong, 511436, P. R. China
| | - Zhi Zhou
- Guangzhou Municipal and Guangdong Provincial Key Laboratory of Protein Modification and Degradation & Molecular Target and Clinical Pharmacology State Key Laboratory of Respiratory Disease School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University Guangzhou, Guangdong, 511436, P. R. China
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333
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Wein LA, Wurst K, Angyal P, Weisheit L, Magauer T. Synthesis of (-)-Mitrephorone A via a Bioinspired Late Stage C-H Oxidation of (-)-Mitrephorone B. J Am Chem Soc 2019; 141:19589-19593. [PMID: 31770485 DOI: 10.1021/jacs.9b11646] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
We present a bioinspired late-stage C-H oxidation of the ent-trachylobane natural product mitrephorone B to mitrephorone A. The realization of this unprecedented transformation was accomplished by either an iron-catalyzed or electrochemical oxidation and enabled access to the densely substituted oxetane in one step. Formation of mitrephorone C, which is lacking the central oxetane unit but features a keto-function at C2, was not formed under these conditions.
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Affiliation(s)
- Lukas Anton Wein
- Institute of Organic Chemistry and Center for Molecular Biosciences , Leopold-Franzens-University Innsbruck , Innrain 80-82 , 6020 Innsbruck , Austria
| | - Klaus Wurst
- Institute of General, Inorganic and Theoretical Chemistry , Leopold-Franzens-University Innsbruck , Innrain 80-82 , 6020 Innsbruck , Austria
| | - Peter Angyal
- Institute of Organic Chemistry , Research Centre for Natural Sciences , Magyar tudósok körútja 2 , 1117 Budapest , Hungary
| | - Lara Weisheit
- Institute of Organic Chemistry and Center for Molecular Biosciences , Leopold-Franzens-University Innsbruck , Innrain 80-82 , 6020 Innsbruck , Austria
| | - Thomas Magauer
- Institute of Organic Chemistry and Center for Molecular Biosciences , Leopold-Franzens-University Innsbruck , Innrain 80-82 , 6020 Innsbruck , Austria
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334
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335
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Saini G, Mondal A, Kapur M. Palladium-Mediated Remote Functionalization in γ- and ε-Arylations and Alkenylations of Unblocked Cyclic Enones. Org Lett 2019; 21:9071-9075. [PMID: 31680525 DOI: 10.1021/acs.orglett.9b03462] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
We report herein an extensive investigation of simple and regioselective endo- as well as exo-γ-arylations of silyl-dienol ethers of unblocked cyclic enones with the utilization of palladium-catalyzed, modified Kuwajima-Urabe conditions. We have also successfully explored a new exo-ε-arylation of silyl-trienol ethers of π-extended cyclic enones. In addition, we also report, herein, exclusive γ- and ε-alkenylation of silyl-dienol and silyl-trienol ethers of cyclic enones.
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Affiliation(s)
- Gaurav Saini
- Department of Chemistry , Indian Institute of Science Education and Research Bhopal , Bhopal Bypass Road , Bhauri, Bhopal 462066 , MP , India
| | - Arpan Mondal
- Department of Chemistry , Indian Institute of Science Education and Research Bhopal , Bhopal Bypass Road , Bhauri, Bhopal 462066 , MP , India
| | - Manmohan Kapur
- Department of Chemistry , Indian Institute of Science Education and Research Bhopal , Bhopal Bypass Road , Bhauri, Bhopal 462066 , MP , India
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336
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Bauer A, Maulide N. Chemoselective formal β-functionalization of substituted aliphatic amides enabled by a facile stereoselective oxidation event. Chem Sci 2019; 10:9836-9840. [PMID: 32015806 PMCID: PMC6977552 DOI: 10.1039/c9sc03715b] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2019] [Accepted: 08/29/2019] [Indexed: 11/21/2022] Open
Abstract
Aliphatic C-H functionalization is a topic of current intense interest in organic synthesis. Herein, we report that a facile and stereoselective dehydrogenation event enables the functionalization of aliphatic amides at different positions in a one-pot fashion. Derivatives of relevant pharmaceuticals were formally functionalized in the β-position in late-stage manner. A single-step synthesis of incrustoporine from a simple precursor further showcases the potential utility of this approach.
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Affiliation(s)
- Adriano Bauer
- Institute of Organic Chemistry , University of Vienna , Währinger Straße 38 , 1090 Vienna , Austria .
| | - Nuno Maulide
- Institute of Organic Chemistry , University of Vienna , Währinger Straße 38 , 1090 Vienna , Austria .
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337
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Devkota S, Lee H, Kim SH, Lee YR. Direct Construction of Diverse Polyheterocycles Bearing Pyrrolidinediones via Rh(III)‐Catalyzed Cascade C−H Activation/Spirocyclization. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201901019] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Shreedhar Devkota
- School of Chemical EngineeringYeungnam University Gyeongsan 38541 Republic of Korea
| | - Ha‐Jin Lee
- Western Seoul Center, Korea Basic Science Institute 150 Bugahyun-ro, Seoudaemun-gu Seoul 03759 Republic of Korea
| | - Sung Hong Kim
- Analysis Research DivisionDaegu Center, Korea Basic Science Institute Daegu 41566 Republic of Korea
| | - Yong Rok Lee
- School of Chemical EngineeringYeungnam University Gyeongsan 38541 Republic of Korea
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338
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Mu QC, Nie YX, Bai XF, Chen J, Yang L, Xu Z, Li L, Xia CG, Xu LW. Tertiary amine-directed and involved carbonylative cyclizations through Pd/Cu-cocatalyzed multiple C-X (X = H or N) bond cleavage. Chem Sci 2019; 10:9292-9301. [PMID: 32055315 PMCID: PMC7003976 DOI: 10.1039/c9sc03081f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2019] [Accepted: 08/17/2019] [Indexed: 01/01/2023] Open
Abstract
A novel Pd/Cu-cocatalyzed carbonylative cyclization by C-H activation and N-dealkylative C-N bond activation has been developed for the chemoselective construction of synthetically useful heterocycles. The N,N-dimethylamine group on o-indolyl-N,N-dimethylarylamines was found to act as both the directing group and reactive component in this C-H carbonylative cyclization reaction. Furthermore, a unique C-H oxidation/carbonylative lactonization of diarylmethylamines is firstly demonstrated under modified reaction conditions, which could be easily applicable to the one-step synthesis of multi-substituted phthalides bearing an N,O-ketal skeleton that is difficult to access by previously reported methods. Mechanistic studies implicate that Pd/Cu-cocatalyzed C-H oxidation/carbonylative lactonization is a sequential reaction system via Cu-catalyzed C(sp3)-H oxidation and Pd-catalyzed oxidative carbonylation of the C(sp2)-H bond. It was found that trace amounts of water are essential to promote the Cu-catalyzed C(sp3)-H oxidation of diarylmethylamine for the formation of the hydroxyl group, which could act as an in situ-formed directing group in the intramolecular carbonylative lactonization step.
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Affiliation(s)
- Qiu-Chao Mu
- State Key Laboratory for Oxo Synthesis and Selective Oxidation , Suzhou Research Institute (SRI) , Lanzhou Institute of Chemical Physics (LICP) , University of the Chinese Academy of Sciences (UCAS) , Lanzhou 730000 , P. R. China . ;
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education , Key Laboratory of Organosilicon Material Technology of Zhejiang Province , Hangzhou Normal University , Hangzhou 311121 , P. R. China .
| | - Yi-Xue Nie
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education , Key Laboratory of Organosilicon Material Technology of Zhejiang Province , Hangzhou Normal University , Hangzhou 311121 , P. R. China .
| | - Xing-Feng Bai
- State Key Laboratory for Oxo Synthesis and Selective Oxidation , Suzhou Research Institute (SRI) , Lanzhou Institute of Chemical Physics (LICP) , University of the Chinese Academy of Sciences (UCAS) , Lanzhou 730000 , P. R. China . ;
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education , Key Laboratory of Organosilicon Material Technology of Zhejiang Province , Hangzhou Normal University , Hangzhou 311121 , P. R. China .
| | - Jing Chen
- State Key Laboratory for Oxo Synthesis and Selective Oxidation , Suzhou Research Institute (SRI) , Lanzhou Institute of Chemical Physics (LICP) , University of the Chinese Academy of Sciences (UCAS) , Lanzhou 730000 , P. R. China . ;
| | - Lei Yang
- State Key Laboratory for Oxo Synthesis and Selective Oxidation , Suzhou Research Institute (SRI) , Lanzhou Institute of Chemical Physics (LICP) , University of the Chinese Academy of Sciences (UCAS) , Lanzhou 730000 , P. R. China . ;
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education , Key Laboratory of Organosilicon Material Technology of Zhejiang Province , Hangzhou Normal University , Hangzhou 311121 , P. R. China .
| | - Zheng Xu
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education , Key Laboratory of Organosilicon Material Technology of Zhejiang Province , Hangzhou Normal University , Hangzhou 311121 , P. R. China .
| | - Li Li
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education , Key Laboratory of Organosilicon Material Technology of Zhejiang Province , Hangzhou Normal University , Hangzhou 311121 , P. R. China .
| | - Chun-Gu Xia
- State Key Laboratory for Oxo Synthesis and Selective Oxidation , Suzhou Research Institute (SRI) , Lanzhou Institute of Chemical Physics (LICP) , University of the Chinese Academy of Sciences (UCAS) , Lanzhou 730000 , P. R. China . ;
| | - Li-Wen Xu
- State Key Laboratory for Oxo Synthesis and Selective Oxidation , Suzhou Research Institute (SRI) , Lanzhou Institute of Chemical Physics (LICP) , University of the Chinese Academy of Sciences (UCAS) , Lanzhou 730000 , P. R. China . ;
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education , Key Laboratory of Organosilicon Material Technology of Zhejiang Province , Hangzhou Normal University , Hangzhou 311121 , P. R. China .
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339
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Huynh TV, Doan SH, Trinh KH, Ly TH, Phan ALT, Nguyen TT, Phan ANQ, Phan NTS. Metal‐Free One‐Pot Three‐Component Synthesis of Quinazoline Derivatives via Peroxide‐Mediated Direct Oxidative Amination of C(sp
3
)–H Bonds. ChemistrySelect 2019. [DOI: 10.1002/slct.201903154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Tien V. Huynh
- Faculty of Chemical EngineeringHCMC University of Technology, VNU-HCM 268 Ly Thuong Kiet, District 10 Ho Chi Minh City Viet Nam
- Faculty of Chemical TechnologyHCMC University of Food Industry 140 Le Trong Tan, Tan Phu District Ho Chi Minh City Viet Nam
| | - Son H. Doan
- Faculty of Chemical EngineeringHCMC University of Technology, VNU-HCM 268 Ly Thuong Kiet, District 10 Ho Chi Minh City Viet Nam
| | - Khang H. Trinh
- Faculty of Chemical EngineeringHCMC University of Technology, VNU-HCM 268 Ly Thuong Kiet, District 10 Ho Chi Minh City Viet Nam
| | - Trang H. Ly
- Faculty of Chemical EngineeringHCMC University of Technology, VNU-HCM 268 Ly Thuong Kiet, District 10 Ho Chi Minh City Viet Nam
- Faculty of Chemical TechnologyHCMC University of Food Industry 140 Le Trong Tan, Tan Phu District Ho Chi Minh City Viet Nam
| | - Anh L. T. Phan
- Faculty of Chemical EngineeringHCMC University of Technology, VNU-HCM 268 Ly Thuong Kiet, District 10 Ho Chi Minh City Viet Nam
| | - Tung T. Nguyen
- Faculty of Chemical EngineeringHCMC University of Technology, VNU-HCM 268 Ly Thuong Kiet, District 10 Ho Chi Minh City Viet Nam
| | - Anh N. Q. Phan
- Faculty of Chemical EngineeringHCMC University of Technology, VNU-HCM 268 Ly Thuong Kiet, District 10 Ho Chi Minh City Viet Nam
| | - Nam T. S. Phan
- Faculty of Chemical EngineeringHCMC University of Technology, VNU-HCM 268 Ly Thuong Kiet, District 10 Ho Chi Minh City Viet Nam
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340
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Tomberg A, Muratore MÉ, Johansson MJ, Terstiege I, Sköld C, Norrby PO. Relative Strength of Common Directing Groups in Palladium-Catalyzed Aromatic C-H Activation. iScience 2019; 20:373-391. [PMID: 31614320 PMCID: PMC6818342 DOI: 10.1016/j.isci.2019.09.035] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Revised: 08/29/2019] [Accepted: 09/24/2019] [Indexed: 11/17/2022] Open
Abstract
Efficient functionalization of C-H bonds can be achieved using transition metal catalysts, such as Pd(OAc)2. To better control the regioselectivity in these reactions, some functional groups on the substrate may be used as directing groups, guiding the reactivity to an ortho position. Herein, we describe a methodology to score the relative strength of such directing groups in palladium-catalyzed aromatic C-H activation. The results have been collected into a scale that serves to predict the regioselectivity on molecules with multiple competing directing groups. We demonstrate that this scale yields accurate predictions on over a hundred examples, taken from the literature. In addition to the regioselectivity prediction on complex molecules, the knowledge of the relative strengths of directing groups can also be used to work with new combinations of functionalities, exploring uncharted chemical space.
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Affiliation(s)
- Anna Tomberg
- Hit Discovery, Discovery Sciences, R&D, AstraZeneca Gothenburg, Mölndal 431 83, Sweden
| | - Michael Éric Muratore
- Medicinal Chemistry, Research and Early Development Cardiovascular, Renal and Metabolism, BioPharmaceuticals R&D, AstraZeneca Gothenburg, Mölndal 431 83, Sweden
| | - Magnus Jan Johansson
- Medicinal Chemistry, Research and Early Development Cardiovascular, Renal and Metabolism, BioPharmaceuticals R&D, AstraZeneca Gothenburg, Mölndal 431 83, Sweden
| | - Ina Terstiege
- Respiratory, BioPharmaceuticals R&D, AstraZeneca Gothenburg, Mölndal 431 83, Sweden
| | - Christian Sköld
- Department of Medicinal Chemistry, Drug Design and Development, Uppsala University, Box 574, Uppsala 751 23, Sweden
| | - Per-Ola Norrby
- Data Science & Modelling, Pharmaceutical Sciences, R&D, AstraZeneca Gothenburg, Mölndal 431 83, Sweden.
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341
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Zhang Q, Zhang XF, Li M, Li C, Liu JQ, Jiang YY, Ji X, Liu L, Wu YC. Mechanistic Insights into the Chemo- and Regio-Selective B(C6F5)3 Catalyzed C–H Functionalization of Phenols with Diazoesters. J Org Chem 2019; 84:14508-14519. [DOI: 10.1021/acs.joc.9b02035] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Qi Zhang
- Anhui Province Key Lab of Aerospace Structural Parts Forming Technology and Equipment, Institute of Industry & Equipment Technology, Hefei University of Technology, Hefei 230009, China
| | - Xiao-Fei Zhang
- Anhui Province Key Lab of Aerospace Structural Parts Forming Technology and Equipment, Institute of Industry & Equipment Technology, Hefei University of Technology, Hefei 230009, China
| | - Mo Li
- Anhui Province Key Lab of Aerospace Structural Parts Forming Technology and Equipment, Institute of Industry & Equipment Technology, Hefei University of Technology, Hefei 230009, China
| | - Cheng Li
- Anhui Province Key Lab of Aerospace Structural Parts Forming Technology and Equipment, Institute of Industry & Equipment Technology, Hefei University of Technology, Hefei 230009, China
| | - Jia-Qin Liu
- Anhui Province Key Lab of Aerospace Structural Parts Forming Technology and Equipment, Institute of Industry & Equipment Technology, Hefei University of Technology, Hefei 230009, China
| | - Yuan-Ye Jiang
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, China
| | - Xin Ji
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China
| | - Lu Liu
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China
| | - Yu-Cheng Wu
- School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China
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342
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Davies HML. Finding Opportunities from Surprises and Failures. Development of Rhodium-Stabilized Donor/Acceptor Carbenes and Their Application to Catalyst-Controlled C-H Functionalization. J Org Chem 2019; 84:12722-12745. [PMID: 31525891 PMCID: PMC7232105 DOI: 10.1021/acs.joc.9b02428] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Catalyst-controlled C-H functionalization by means of the C-H insertion chemistry of rhodium carbenes has become a powerful synthetic method. The key requirements for the development of this chemistry are donor/acceptor carbenes and the chiral dirhodium tetracarboxylate catalysts. This perspective will describe the stages involved in developing this chemistry and illustrate the scope of the donor/acceptor carbene C-H functionalization.
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Affiliation(s)
- Huw M L Davies
- Department of Chemistry , Emory University , 1515 Dickey Drive , Atlanta , Georgia 30322 , Unites States
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343
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Zhang J, Xie H, Zhu H, Zhang S, Reddy Lonka M, Zou H. Chameleon-like Behavior of the Directing Group in the Rh(III)-Catalyzed Regioselective C–H Amidation of Indole: An Experimental and Computational Study. ACS Catal 2019. [DOI: 10.1021/acscatal.9b02512] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Jinquan Zhang
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, P. R. China
| | - Hujun Xie
- Department of Applied Chemistry, Zhejiang Gongshang University, Hangzhou 310018, P. R. China
| | - Huajian Zhu
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, P. R. China
- Zhejiang University City College, Hangzhou 310015, P. R. China
| | - Shuaizhong Zhang
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, P. R. China
| | - Madhava Reddy Lonka
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, P. R. China
| | - Hongbin Zou
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, P. R. China
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344
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Thesmar P, Baudoin O. Efficient and Divergent Total Synthesis of (-)-Epicoccin G and (-)-Rostratin A Enabled by Double C(sp 3)-H Activation. J Am Chem Soc 2019; 141:15779-15783. [PMID: 31556609 DOI: 10.1021/jacs.9b09359] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Dithiodiketopiperazines are complex polycyclic natural products possessing a variety of interesting biological activities. Despite their interest, relatively few total syntheses have been completed. We herein report the enantioselective, scalable, and divergent total synthesis of two symmetrical pentacyclic dithiodiketopiperazines, (-)-epicoccin G and (-)-rostratin A. A common intermediate was synthesized on a multigram scale from inexpensive, commercially available starting materials using an enantioselective organocatalytic epoxidation and a double C(sp3)-H activation as key steps, with the latter allowing the efficient simultaneous construction of the two five-membered rings. In addition to the cis,cis-fused target (-)-epiccocin G, the more challenging (-)-rostratin A, possessing two trans ring junctions, was obtained for the first time on a 500 mg scale through the optimization of each step and validation on multigram quantities. Both natural products were synthesized with high overall yields (13-20%). This study should facilitate access to this fascinating and yet understudied family of biologically active natural products.
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Affiliation(s)
- Pierre Thesmar
- Department of Chemistry , University of Basel , St. Johanns-Ring 19 , CH-4056 Basel , Switzerland
| | - Olivier Baudoin
- Department of Chemistry , University of Basel , St. Johanns-Ring 19 , CH-4056 Basel , Switzerland
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345
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Li ZY, Lakmal HHC, Qian X, Zhu Z, Donnadieu B, McClain SJ, Xu X, Cui X. Ruthenium-Catalyzed Enantioselective C-H Functionalization: A Practical Access to Optically Active Indoline Derivatives. J Am Chem Soc 2019; 141:15730-15736. [PMID: 31536341 DOI: 10.1021/jacs.9b07251] [Citation(s) in RCA: 70] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Ru(II)-catalyzed enantioselective C-H activation/hydroarylation has been developed for the first time, allowing for highly enantioselective synthesis of indoline derivatives via catalytic C-H activation. Commercially available Ru(II) arene complexes and chiral α-methylamines were employed as highly enantioselective catalysts. Based on a sterically rigidified chiral transient directing group, multisubstituted indolines were produced in up to 92% yield with 96% ee. Further transformation of the resulting 4-formylindoline enables access to an optically active tricyclic compound that is of potential biological and pharmaceutical interest.
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Affiliation(s)
- Zhong-Yuan Li
- Department of Chemistry , Mississippi State University , Mississippi State , Mississippi 39762 , United States
| | - Hetti Handi Chaminda Lakmal
- Department of Chemistry , Mississippi State University , Mississippi State , Mississippi 39762 , United States
| | - Xiaolin Qian
- Department of Chemistry , Mississippi State University , Mississippi State , Mississippi 39762 , United States
| | - Zhenyu Zhu
- Department of Chemistry , Mississippi State University , Mississippi State , Mississippi 39762 , United States
| | - Bruno Donnadieu
- Department of Chemistry , Mississippi State University , Mississippi State , Mississippi 39762 , United States
| | - Sarah J McClain
- Department of Chemistry , Mississippi State University , Mississippi State , Mississippi 39762 , United States
| | - Xue Xu
- Department of Chemistry , Mississippi State University , Mississippi State , Mississippi 39762 , United States
| | - Xin Cui
- Department of Chemistry , Mississippi State University , Mississippi State , Mississippi 39762 , United States
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346
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Tanaka K, Ewing WR, Yu JQ. Hemilabile Benzyl Ether Enables γ-C(sp 3)-H Carbonylation and Olefination of Alcohols. J Am Chem Soc 2019; 141:15494-15497. [PMID: 31519108 DOI: 10.1021/jacs.9b08238] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Pd-catalyzed C(sp3)-H activation of alcohol typically shows β-selectivity due to the required distance between the chelating atom in the attached directing group and the targeted C-H bonds. Herein we report the design of a hemilabile directing group which exploits the chelation of a readily removable benzyl ether moiety to direct γ- or δ-C-H carbonylation and olefination of alcohols. The utility of this approach is also demonstrated in the late-stage C-H functionalization of β-estradiol to rapidly prepare desired analogues that required multi-step syntheses with classical methods.
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Affiliation(s)
- Keita Tanaka
- Department of Chemistry , The Scripps Research Institute , 10550 North Torrey Pines Road , La Jolla , California 92037 , United States
| | - William R Ewing
- Discovery Chemistry , Bristol-Myers Squibb , P.O. Box 4000, Princeton , New Jersey 08543 , United States
| | - Jin-Quan Yu
- Department of Chemistry , The Scripps Research Institute , 10550 North Torrey Pines Road , La Jolla , California 92037 , United States
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347
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Liu Z, Zhang W, Guo S, Zhu J. Spiro[indene-1,4'-oxa-zolidinones] Synthesis via Rh(III)-Catalyzed Coupling of 4-Phenyl-1,3-oxazol-2(3 H)-ones with Alkynes: A Redox-Neutral Approach. J Org Chem 2019; 84:11945-11957. [PMID: 31436097 DOI: 10.1021/acs.joc.9b01804] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Transition-metal-catalyzed C-H activation synthesis of heterocyclic spiro[4,4]nonanes has persistently witnessed the use of additional stoichiometric transition-metal oxidant when employing C═C bond as the spiro ring closure site. Herein, we have addressed the issue by reporting a redox-neutral strategy for spiro[indene-1,4'-oxa-zolidinones] synthesis via Rh(III)-catalyzed coupling of 4-phenyl-1,3-oxazol-2(3H)-ones with alkynes. The synthesis features a broad substrate scope and high regiospecificity.
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Affiliation(s)
- Zhongsu Liu
- School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Nanjing National Laboratory of Microstructures , Nanjing University , Nanjing 210023 , China
| | - Wenjing Zhang
- School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Nanjing National Laboratory of Microstructures , Nanjing University , Nanjing 210023 , China
| | - Shan Guo
- School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Nanjing National Laboratory of Microstructures , Nanjing University , Nanjing 210023 , China
| | - Jin Zhu
- School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Nanjing National Laboratory of Microstructures , Nanjing University , Nanjing 210023 , China
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348
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Vu HM, Chen F, Li X. Acetoxylation and Halogenation of 2‐Arylbenzoxazinones via Palladium‐Catalyzed C(sp
2
)‐H Bond Oxidation. ChemistrySelect 2019. [DOI: 10.1002/slct.201902611] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Huu Manh Vu
- School of Chemical and Biological EngineeringUniversity of Science and Technology Beijing 30 Xueyuan Road, Haidian District Beijing 100083 PR China
| | - Fei‐Wu Chen
- School of Chemical and Biological EngineeringUniversity of Science and Technology Beijing 30 Xueyuan Road, Haidian District Beijing 100083 PR China
| | - Xu‐Qin Li
- School of Chemical and Biological EngineeringUniversity of Science and Technology Beijing 30 Xueyuan Road, Haidian District Beijing 100083 PR China
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349
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Yuan YC, Bruneau C, Roisnel T, Gramage-Doria R. Ruthenium(ii)-catalysed selective C(sp 2)-H bond benzoxylation of biologically appealing N-arylisoindolinones. Org Biomol Chem 2019; 17:7517-7525. [PMID: 31368474 DOI: 10.1039/c9ob01122f] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Site- and regio-selective aromatic C-H bond benzoxylations were found to take place using biologically appealing N-arylisoindolinones under ruthenium(ii) catalysis in the presence of (hetero)aromatic carboxylic acid derivatives as coupling partners. Besides the presence of two potential C(sp2)-H sites available for functionalization in the substrates, exclusive ortho selectivity was achieved in the phenyl ring attached to the nitrogen atom. Notably, the reactions occurred in a selective manner as only mono-functionalized products were formed and they tolerated a large number of functional chemical groups. The ability of the cyclic tertiary amide within the isoindolinone skeleton to act as a weak directing group in order to accommodate six-membered ring ruthenacycle intermediates appears to be the key to reach such high levels of selectivity. In contrast, the more sterically demanding cyclic imides were unreactive under identical reaction conditions.
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Affiliation(s)
- Yu-Chao Yuan
- Univ Rennes, CNRS, ISCR - UMR6226, F-35000 Rennes, France.
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350
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Subhedar DD, Deshmukh DS, Bhanage BM. Cp*Co(III) catalyzed annulation of N-Cbz hydrazones for the redox-neutral synthesis of isoquinolines via C–H/N–N bond activation. SYNTHETIC COMMUN 2019. [DOI: 10.1080/00397911.2019.1655765] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
| | - Dewal S. Deshmukh
- Department of Chemistry, Institute of Chemical Technology, Mumbai, India
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