1
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Magham LR, Thopate SB, Samad A, Chegondi R. Enantioselective Desymmetrization Triggered by Iminium-Enamine Activation: Access to Complex Cyclohepta[b]indoles. Chemistry 2023; 29:e202203435. [PMID: 36530064 DOI: 10.1002/chem.202203435] [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: 11/04/2022] [Revised: 12/14/2022] [Accepted: 12/14/2022] [Indexed: 12/23/2022]
Abstract
The expeditious construction of complex molecules having multiple stereocentres is highly desirable in organic chemistry. In the present communication, we report the development of an organocatalytic asymmetric desymmetrization of prochiral enal-tethered cyclohexadienones via the C3-selective Friedel-Crafts alkylation of indoles triggered by LUMO-lowering iminium activation/HOMO-raising enamine activation. The reaction provides access to bicyclic enones, which further undergo acid-mediated intramolecular annulation from C2-position to afford highly strained cyclohepta[b]indoles with five contiguous stereocentres and three new C-C bonds in excellent enantioselectivity and diastereoselectivity.
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Affiliation(s)
- Lakshmi Revati Magham
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad, 500007, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201 002, India
| | - Satish B Thopate
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad, 500007, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201 002, India
| | - Abdus Samad
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad, 500007, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201 002, India
| | - Rambabu Chegondi
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad, 500007, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201 002, India
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2
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Kamlar M, Urban M, Veselý J. Enantioselective Synthesis of Spiro Heterocyclic Compounds Using a Combination of Organocatalysis and Transition-Metal Catalysis. CHEM REC 2023:e202200284. [PMID: 36703545 DOI: 10.1002/tcr.202200284] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 12/30/2022] [Indexed: 01/28/2023]
Abstract
Over the last ten years, the combination of organocatalysis with transition metal (TM) catalysis has become one of the most important toolboxes used for synthesizing optically pure compounds containing chiral quaternary centers, including spiro heterocyclic molecules. The dominant method in the enantioselective synthesis of spiro heterocyclic compounds based on synergistic catalysis includes chiral aminocatalysis and NHC catalysis, as already established covalent organocatalytic strategies. Another area of organocatalysis widely combined with TM catalysis producing enantiomerically enriched spiro heterocyclic compounds is non-covalent catalysis, dominated by chiral phosphoric acids, thiourea, and squaramide derivatives. This review article aims to summarize enantioselective methods used for constructing spirocyclic heterocycles based on a combination of organocatalysis and transition metal catalysis.
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Affiliation(s)
- Martin Kamlar
- Charles University Faculty of Science: Univerzita Karlova Prirodovedecka fakulta, Prague, CZECH REPUBLIC
| | - Michal Urban
- Charles University Faculty of Science: Univerzita Karlova Prirodovedecka fakulta, Prague, CZECH REPUBLIC
| | - Jan Veselý
- Charles University Faculty of Science: Univerzita Karlova Prirodovedecka fakulta, Prague, CZECH REPUBLIC
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3
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De Risi C, Brandolese A, Di Carmine G, Ragno D, Massi A, Bortolini O. Oxidative N-Heterocyclic Carbene Catalysis. Chemistry 2023; 29:e202202467. [PMID: 36205918 PMCID: PMC10099058 DOI: 10.1002/chem.202202467] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Indexed: 11/05/2022]
Abstract
N-Heterocyclic carbene (NHC) catalysis is a by now consolidated organocatalytic platform for a number of synthetic (asymmetric) transformations via diverse reaction modes/intermediates. In addition to the typical umpolung processes involving acyl anion/homoenolate equivalent species, implementation of protocols under oxidative conditions greatly expands the possibilities of this methodology. Oxidative NHC-catalysis allows for oxidative and oxygenative transformations through specific manipulations of Breslow-type species depending upon the oxidant used (external oxidant or O2 /air), the derived NHC-bound intermediates paving the way to non-umpolung processes through activation of carbon atoms and heteroatoms. This review is intended to update the state of the art in oxidative NHC-catalyzed reactions that appeared in the literature from 2014 to present, with a strong focus to crucial intermediates and their mechanistic implications.
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Affiliation(s)
- Carmela De Risi
- Dipartimento di Scienze Chimiche, Farmaceutiche ed AgrarieUniversità di FerraraVia L. Borsari, 4644121FerraraItaly
| | - Arianna Brandolese
- Dipartimento di Scienze dell'Ambiente e della PrevenzioneUniversità di FerraraVia L. Borsari, 4644121FerraraItaly
| | - Graziano Di Carmine
- Dipartimento di Scienze Chimiche, Farmaceutiche ed AgrarieUniversità di FerraraVia L. Borsari, 4644121FerraraItaly
| | - Daniele Ragno
- Dipartimento di Scienze Chimiche, Farmaceutiche ed AgrarieUniversità di FerraraVia L. Borsari, 4644121FerraraItaly
| | - Alessandro Massi
- Dipartimento di Scienze Chimiche, Farmaceutiche ed AgrarieUniversità di FerraraVia L. Borsari, 4644121FerraraItaly
| | - Olga Bortolini
- Dipartimento di Scienze dell'Ambiente e della PrevenzioneUniversità di FerraraVia L. Borsari, 4644121FerraraItaly
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4
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Liu X, An T, Yin Z, Zhang W. Palladium-Catalyzed Reductive Double Carbonylation of Nitroarenes with Aryl Halides Using Mo(CO) 6 as a Reductant and Carbonyl Source. Chemistry 2023; 29:e202202880. [PMID: 36177713 DOI: 10.1002/chem.202202880] [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: 09/15/2022] [Indexed: 01/12/2023]
Abstract
A new palladium-catalyzed reductive double carbonylation of nitroarenes with aryl halides for the synthesis of benzoxazin-4-ones has been reported. The key to success was the use of Mo(CO)6 as a reductant and bench-stable solid carbonyl sources. Various aryl iodides, bromides, and trifluoromethanesulfonates are suitable reaction partners and produce corresponding benzoxazin-4-one derivatives in moderate to good yields. Preliminary mechanistic studies indicate that nitrosoarene was first generated as the key intermediate through nitro reduction. Remarkably, this method avoids the use of toxic CO gas and is further applied to the late-stage modification of estrone.
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Affiliation(s)
- Xueling Liu
- Department of Pharmacy, The Affiliated Cancer Hospital of Zhengzhou University Henan Cancer Hospital, Zhengzhou, 450008, P. R. China
| | - Tongshun An
- School of Pharmacy, Jiangsu University, Zhenjiang, 212013, P. R. China
| | - Zhiping Yin
- School of Pharmacy, Jiangsu University, Zhenjiang, 212013, P. R. China
| | - Wenzhou Zhang
- Department of Pharmacy, The Affiliated Cancer Hospital of Zhengzhou University Henan Cancer Hospital, Zhengzhou, 450008, P. R. China
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5
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Zhang S, Wang X, Han LL, Li J, Liang Z, Wei D, Du D. Atroposelective Synthesis of Triaryl α-Pyranones with 1,2-Diaxes by N-Heterocyclic Carbene Organocatalysis. Angew Chem Int Ed Engl 2022; 61:e202212005. [PMID: 36314469 DOI: 10.1002/anie.202212005] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Indexed: 11/25/2022]
Abstract
Atropisomers bearing multiple stereogenic axes are of increasing importance to the field of material science, pharmaceuticals, and catalysis. However, the atroposelective construction of multi-axis atropisomers remains rare and challenging, due to the intrinsical difficulties in the stereo-control of the multiple stereogenic axes. Herein, we demonstrate a single-step construction of a new class of 1,2-diaxially chiral triaryl α-pyranones by an N-heterocyclic carbene organocatalytic asymmetric [3+3] annulation of well-designed alkynyl acylazolium precursors and enolizable sterically hindered 2-aryl ketones. The protocol features broad substrate scope (>50 examples), excellent stereo-control (most cases >20 : 1 dr, up to 99.5 : 0.5 er), and potentially useful synthetic applications. The success of this reaction relies on the rational design of structurally matched reaction partners and the careful selection of the asymmetric catalytic system. DFT calculations have also been performed to discover and rationalize the origin of the high stereoselectivity of this reaction.
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Affiliation(s)
- Simiao Zhang
- State Key Laboratory of Natural Medicines, Department of Organic Chemistry, China Pharmaceutical University, Nanjing, 210009, P.R. China
| | - Xiaoxue Wang
- State Key Laboratory of Natural Medicines, Department of Organic Chemistry, China Pharmaceutical University, Nanjing, 210009, P.R. China
| | - Li-Li Han
- College of Chemistry, Zhengzhou University, Zhengzhou, Henan Province, 450001, P. R. China
| | - Jibin Li
- State Key Laboratory of Natural Medicines, Department of Organic Chemistry, China Pharmaceutical University, Nanjing, 210009, P.R. China
| | - Zheng Liang
- State Key Laboratory of Natural Medicines, Department of Organic Chemistry, China Pharmaceutical University, Nanjing, 210009, P.R. China
| | - Donghui Wei
- College of Chemistry, Zhengzhou University, Zhengzhou, Henan Province, 450001, P. R. China
| | - Ding Du
- State Key Laboratory of Natural Medicines, Department of Organic Chemistry, China Pharmaceutical University, Nanjing, 210009, P.R. China
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6
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Malakar CC, Dell'Amico L, Zhang W. Dual Catalysis in Organic Synthesis: Current Challenges and New Trends. European J Org Chem 2022. [DOI: 10.1002/ejoc.202201114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Chandi C. Malakar
- Department of Chemistry National Institute of Technology Manipur Langol Imphal 795004 Manipur India
| | - Luca Dell'Amico
- Department of Chemical Sciences University of Padova Via Marzolo 1 35131 Padova Italy
| | - Wanbin Zhang
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs School of Chemistry and Chemical Engineering Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China
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7
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Döben N, Reimler J, Studer A. Cooperative NHC/Photoredox Catalysis: Three Component Radical Coupling of Aroyl Fluorides, Styrenes and Alcohols. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200574] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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8
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Wessels A, Klussmann M, Breugst M, Schlörer NE, Berkessel A. Formation of Breslow Intermediates from N‐Heterocyclic Carbenes and Aldehydes Involves Autocatalysis by the Breslow Intermediate, and a Hemiacetal. Angew Chem Int Ed Engl 2022; 61:e202117682. [PMID: 35238462 PMCID: PMC9325009 DOI: 10.1002/anie.202117682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Indexed: 11/23/2022]
Abstract
Under aprotic conditions, the stoichiometric reaction of N‐heterocyclic carbenes (NHCs) such as imidazolidin‐2‐ylidenes with aldehydes affords Breslow Intermediates (BIs), involving a formal 1,2‐C‐to‐O proton shift. We herein report kinetic studies (NMR), complemented by DFT calculations, on the mechanism of this kinetically disfavored H‐translocation. Variable time normalization analysis (VTNA) revealed that the kinetic orders of the reactants vary for different NHC‐to‐aldehyde ratios, indicating different and ratio‐dependent mechanistic regimes. We propose that for high NHC‐to‐aldehyde ratios, the H‐shift takes place in the primary, zwitterionic NHC‐aldehyde adduct. With excess aldehyde, the zwitterion is in equilibrium with a hemiacetal, in which the H‐shift occurs. In both regimes, the critical H‐shift is auto‐catalyzed by the BI. Kinetic isotope effects observed for R‐CDO are in line with our proposal. Furthermore, we detected an H‐bonded complex of the BI with excess NHC (NMR).
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Affiliation(s)
- Alina Wessels
- Department of Chemistry Organic Chemistry University of Cologne Greinstraße 4 50939 Cologne Germany
| | - Martin Klussmann
- Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Germany
- Borchers GmbH Berghausener Straße 100 40764 Langenfeld Germany
| | - Martin Breugst
- Department of Chemistry Organic Chemistry University of Cologne Greinstraße 4 50939 Cologne Germany
| | - Nils E. Schlörer
- Department of Chemistry Organic Chemistry University of Cologne Greinstraße 4 50939 Cologne Germany
| | - Albrecht Berkessel
- Department of Chemistry Organic Chemistry University of Cologne Greinstraße 4 50939 Cologne Germany
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9
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Mondal S, Ghosh A, Biju AT. N-Heterocyclic Carbene (NHC)-Catalyzed Transformations Involving Azolium Enolates. CHEM REC 2022; 22:e202200054. [PMID: 35562645 DOI: 10.1002/tcr.202200054] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 04/19/2022] [Indexed: 11/08/2022]
Abstract
The recent advances in the N-heterocyclic carbene (NHC)-organocatalyzed generation of azolium enolate intermediates and their subsequent interception with electrophiles are highlighted. The NHC-bound azolium intermediates are generated by the addition of NHCs to suitably substituted aldehydes, acid derivatives or ketenes. A broad range of coupling partners can intercept the azolium enolates to form [2+n] cycloadducts (n=2,3,4) and various α-functionalized compounds. The enantioselective synthesis of the target compounds are achieved with the use of chiral NHCs. Herein, we summarized the development that occurred in this subclass of NHC catalysis.
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Affiliation(s)
- Santigopal Mondal
- Department of Organic Chemistry, Indian Institute of Science, Bangalore, 560012
| | - Arghya Ghosh
- Department of Organic Chemistry, Indian Institute of Science, Bangalore, 560012
| | - Akkattu T Biju
- Department of Organic Chemistry, Indian Institute of Science, Bangalore, 560012
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10
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Wessels A, Klussmann M, Breugst M, Schlörer NE, Berkessel A. Die Bildung von Breslow‐Intermediaten aus N‐heterocyclischen Carbenen und Aldehyden verläuft autokatalytisch und mit einem Halbacetal als Intermediat. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202117682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Alina Wessels
- Department für Chemie Organische Chemie Universität zu Köln Greinstraße 4 50939 Köln Deutschland
| | - Martin Klussmann
- Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Deutschland
- Borchers GmbH Berghausener Straße 100 40764 Langenfeld Deutschland
| | - Martin Breugst
- Department für Chemie Organische Chemie Universität zu Köln Greinstraße 4 50939 Köln Deutschland
| | - Nils E. Schlörer
- Department für Chemie Organische Chemie Universität zu Köln Greinstraße 4 50939 Köln Deutschland
| | - Albrecht Berkessel
- Department für Chemie Organische Chemie Universität zu Köln Greinstraße 4 50939 Köln Deutschland
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11
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Thalakottukara DD, Gandhi T. NHC‐Organocatalysed Hydroacylation of Unactivated or Weakly Activated C−C Multiple Bonds and Ketones. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Dolly David Thalakottukara
- Department of Chemistry School of Advanced Sciences Vellore Institute of Technology Vellore 632014 Tamilnadu India
| | - Thirumanavelan Gandhi
- Department of Chemistry School of Advanced Sciences Vellore Institute of Technology Vellore 632014 Tamilnadu India
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12
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Zhen G, Jiang K, Yin B. Progress in Organocatalytic Dearomatization Reactions Catalyzed by Heterocyclic Carbenes. ChemCatChem 2022. [DOI: 10.1002/cctc.202200099] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Guangjin Zhen
- South China University of Technology School of Chemistry and Chemical Engineering CHINA
| | - Kai Jiang
- South China University of Technology School of Chemistry and Chemical Engineering CHINA
| | - Biaolin Yin
- South China University of Technology Dept. of Chenistry and chemical engineering Wushan Street 510640 Guangzhou CHINA
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13
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14
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Song R, Xie Y, Jin Z, Chi YR. Carbene‐Catalyzed Asymmetric Construction of Atropisomers. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202108630] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Runjiang Song
- Division of Chemistry & Biological Chemistry School of Physical & Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Yongtao Xie
- International Joint Research Center for Molecular Science College of Chemistry and Environmental Engineering College of Physics and Optoelectronic Engineering Shenzhen University Shenzhen 518060 China
- Division of Chemistry & Biological Chemistry School of Physical & Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Zhichao Jin
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering Key Laboratory of Green Pesticide and Agricultural Bioengineering Ministry of Education Guizhou University Guiyang 550025 China
| | - Yonggui Robin Chi
- Division of Chemistry & Biological Chemistry School of Physical & Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering Key Laboratory of Green Pesticide and Agricultural Bioengineering Ministry of Education Guizhou University Guiyang 550025 China
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15
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Baire B, Yadav B. TfOH catalysed domino-double annulation of arenes with propargylic alcohols: a unified approach to indene polycyclic systems. Chem Commun (Camb) 2021; 57:12796-12799. [PMID: 34782905 DOI: 10.1039/d1cc05253e] [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
The design and development of a TfOH catalysed domino strategy for the double annulation of arenes with propargylic alcohols for the rapid generation of indene based polycyclic systems is reported. The dehydration, intramolecular 6-endo-dig hydroarylation, and cationic cyclization were consecutively promoted by TfOH. The key features of this strategy are the formation of two C-C bonds, unified access to indene polycyclic systems, excellent yields (up to 95%), high atom economy (>90%), an operationally simple procedure, and water being the only byproduct. By extending this strategy, a two-step synthesis of the pentacyclic systems of hypoxylonol A (43% overall yield from α-tetralone), daldinone A (63% overall yield from β-tetralone) and spiro-tetracyclic framework of incarviatone A has also been achieved.
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Affiliation(s)
- Beeraiah Baire
- Department of Chemistry, Indian Institute of Technology Madras, Chennai-600036, Tamilnadu, India.
| | - Bhavna Yadav
- Department of Chemistry, Indian Institute of Technology Madras, Chennai-600036, Tamilnadu, India.
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16
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Han Z, Gates DP. Metathesis of P=C Bonds Catalyzed by N-Heterocyclic Carbenes. Chemistry 2021; 27:14594-14599. [PMID: 34459044 DOI: 10.1002/chem.202102384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Indexed: 11/05/2022]
Abstract
The catalytic metathesis of C=C bonds is a textbook reaction that has no parallel in the widely studied area of multiple bonds involving heavier p-block elements. A high-yielding P=C bond metathesis of phosphaalkenes (ArP=CPh2 , Ar=Mes, o-Tol, Ph) has been discovered that is catalyzed by N-heterocyclic carbenes (NHC=Me2 IMe, Me2 Ii Pr). The products are cyclic oligomers formally derived from ArP=PAr [i. e. cyclo-(ArP)n ; n=3, 4, 5, 6] and Ph2 C=CPh2 . Preliminary mechanistic studies of this remarkable transformation have established NHC=PAr (Ar=Mes, o-Tol, Ph) as key phosphinidene transfer agents. In addition, novel cyclic intermediates, such as, cyclo-(ArP)2 CPh2 and cyclo-(ArP)4 CPh2 have also been observed. This work represents a rare application of non-metal-based catalysts for transformations involving main-group elements.
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Affiliation(s)
- Zeyu Han
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC, V6T 1Z1, Canada
| | - Derek P Gates
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC, V6T 1Z1, Canada
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17
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Song R, Xie Y, Jin Z, Chi YR. Carbene-Catalyzed Asymmetric Construction of Atropisomers. Angew Chem Int Ed Engl 2021; 60:26026-26037. [PMID: 34270158 DOI: 10.1002/anie.202108630] [Citation(s) in RCA: 90] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Indexed: 11/05/2022]
Abstract
Atropisomeric molecules have found proven applications and have shown promising potential in chemistry and medicine. The design of N-heterocyclic carbene (NHC) catalyzed reactions to construct atropisomerically enriched molecules has emerged as an important research topic in recent years. These reactions include kinetic resolutions, asymmetric desymmetrizations, central-to-axial chirality conversions, and cycloadditions. This Minireview evaluates and summarizes the progress in NHC-based organic catalysis for access to atropisomers, and briefly states our personal perspectives on the future advancement of this topic. NHC catalysis has provided rich and unique reaction modes that have led to success in the asymmetric synthesis of central-chiral molecules. It is expected that similar success could also be achieved in developing NHC catalysis to prepare atropisomeric molecules, including those not easily accessible by other methods.
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Affiliation(s)
- Runjiang Song
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Yongtao Xie
- International Joint Research Center for Molecular Science, College of Chemistry and Environmental Engineering, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, China.,Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Zhichao Jin
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang, 550025, China
| | - Yonggui Robin Chi
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore.,State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang, 550025, China
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18
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Pavithra T, Devi ES, Maheswari CU. Recent Advances in N‐Heterocyclic Carbene Catalyzed Oxidative Cyclization for the Formation of Heterocycles. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100289] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- T. Pavithra
- Department of Chemistry, School of Chemical and Biotechnology SASTRA Deemed University Thanjavur 613401 India
| | - E. Sankari Devi
- Department of Chemistry, School of Chemical and Biotechnology SASTRA Deemed University Thanjavur 613401 India
| | - C. Uma Maheswari
- Department of Chemistry, School of Chemical and Biotechnology SASTRA Deemed University Thanjavur 613401 India
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19
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Cao L, Li T, Chi YR, Jin Z. Carbene‐Catalyzed
N
,
N
‐Nucleophilic Activation of Thioureas for Access to Pyrimidinthione Derivatives. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100113] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Liya Cao
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering key Laboratory of Green Pesticide and Agricultural Bioengineering Ministry of Education Guizhou University Guiyang 550025 P. R. China
- The Key Laboratory of Environmental Pollution Monitoring and Disease Control Ministry of Education School of Public Health Guizhou Medical University Guiyang 550025 P. R. China
| | - Tingting Li
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering key Laboratory of Green Pesticide and Agricultural Bioengineering Ministry of Education Guizhou University Guiyang 550025 P. R. China
| | - Yonggui Robin Chi
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering key Laboratory of Green Pesticide and Agricultural Bioengineering Ministry of Education Guizhou University Guiyang 550025 P. R. China
- Division of Chemistry & Biological Chemistry School of Physical & Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Zhichao Jin
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering key Laboratory of Green Pesticide and Agricultural Bioengineering Ministry of Education Guizhou University Guiyang 550025 P. R. China
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20
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Li T, Mou C, Qi P, Peng X, Jiang S, Hao G, Xue W, Yang S, Hao L, Chi YR, Jin Z. N‐Heterocyclic Carbene‐Catalyzed Atroposelective Annulation for Access to Thiazine Derivatives with C−N Axial Chirality. Angew Chem Int Ed Engl 2021; 60:9362-9367. [DOI: 10.1002/anie.202010606] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Indexed: 12/11/2022]
Affiliation(s)
- Tingting Li
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering Key Laboratory of Green Pesticide and Agricultural Bioengineering Ministry of Education Guizhou University Guiyang 550025 China
| | - Chengli Mou
- School of Pharmacy Guizhou University of Traditional Chinese Medicine Guiyang 550025 China
| | - Puying Qi
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering Key Laboratory of Green Pesticide and Agricultural Bioengineering Ministry of Education Guizhou University Guiyang 550025 China
| | - Xiaolin Peng
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering Key Laboratory of Green Pesticide and Agricultural Bioengineering Ministry of Education Guizhou University Guiyang 550025 China
| | - Shichun Jiang
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering Key Laboratory of Green Pesticide and Agricultural Bioengineering Ministry of Education Guizhou University Guiyang 550025 China
| | - Gefei Hao
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering Key Laboratory of Green Pesticide and Agricultural Bioengineering Ministry of Education Guizhou University Guiyang 550025 China
| | - Wei Xue
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering Key Laboratory of Green Pesticide and Agricultural Bioengineering Ministry of Education Guizhou University Guiyang 550025 China
| | - Song Yang
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering Key Laboratory of Green Pesticide and Agricultural Bioengineering Ministry of Education Guizhou University Guiyang 550025 China
| | - Lin Hao
- Division of Chemistry & Biological Chemistry School of Physical & Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Yonggui Robin Chi
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering Key Laboratory of Green Pesticide and Agricultural Bioengineering Ministry of Education Guizhou University Guiyang 550025 China
- Division of Chemistry & Biological Chemistry School of Physical & Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Zhichao Jin
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering Key Laboratory of Green Pesticide and Agricultural Bioengineering Ministry of Education Guizhou University Guiyang 550025 China
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21
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Li T, Mou C, Qi P, Peng X, Jiang S, Hao G, Xue W, Yang S, Hao L, Chi YR, Jin Z. N‐Heterocyclic Carbene‐Catalyzed Atroposelective Annulation for Access to Thiazine Derivatives with C−N Axial Chirality. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202010606] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Tingting Li
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering Key Laboratory of Green Pesticide and Agricultural Bioengineering Ministry of Education Guizhou University Guiyang 550025 China
| | - Chengli Mou
- School of Pharmacy Guizhou University of Traditional Chinese Medicine Guiyang 550025 China
| | - Puying Qi
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering Key Laboratory of Green Pesticide and Agricultural Bioengineering Ministry of Education Guizhou University Guiyang 550025 China
| | - Xiaolin Peng
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering Key Laboratory of Green Pesticide and Agricultural Bioengineering Ministry of Education Guizhou University Guiyang 550025 China
| | - Shichun Jiang
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering Key Laboratory of Green Pesticide and Agricultural Bioengineering Ministry of Education Guizhou University Guiyang 550025 China
| | - Gefei Hao
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering Key Laboratory of Green Pesticide and Agricultural Bioengineering Ministry of Education Guizhou University Guiyang 550025 China
| | - Wei Xue
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering Key Laboratory of Green Pesticide and Agricultural Bioengineering Ministry of Education Guizhou University Guiyang 550025 China
| | - Song Yang
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering Key Laboratory of Green Pesticide and Agricultural Bioengineering Ministry of Education Guizhou University Guiyang 550025 China
| | - Lin Hao
- Division of Chemistry & Biological Chemistry School of Physical & Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Yonggui Robin Chi
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering Key Laboratory of Green Pesticide and Agricultural Bioengineering Ministry of Education Guizhou University Guiyang 550025 China
- Division of Chemistry & Biological Chemistry School of Physical & Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Zhichao Jin
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering Key Laboratory of Green Pesticide and Agricultural Bioengineering Ministry of Education Guizhou University Guiyang 550025 China
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22
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Paul M, Peckelsen K, Thomulka T, Martens J, Berden G, Oomens J, Neudörfl JM, Breugst M, Meijer AJHM, Schäfer M, Berkessel A. Breslow Intermediates (Amino Enols) and Their Keto Tautomers: First Gas-Phase Characterization by IR Ion Spectroscopy. Chemistry 2021; 27:2662-2669. [PMID: 32893891 PMCID: PMC7898712 DOI: 10.1002/chem.202003454] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 09/01/2020] [Indexed: 12/11/2022]
Abstract
Breslow intermediates (BIs) are the crucial nucleophilic amino enol intermediates formed from electrophilic aldehydes in the course of N-heterocyclic carbene (NHC)-catalyzed umpolung reactions. Both in organocatalytic and enzymatic umpolung, the question whether the Breslow intermediate exists as the nucleophilic enol or in the form of its electrophilic keto tautomer is of utmost importance for its reactivity and function. Herein, the preparation of charge-tagged Breslow intermediates/keto tautomers derived from three different types of NHCs (imidazolidin-2-ylidenes, 1,2,4-triazolin-5-ylidenes, thiazolin-2-ylidenes) and aldehydes is reported. An ammonium charge tag is introduced through the aldehyde unit or the NHC. ESI-MS IR ion spectroscopy allowed the unambiguous conclusion that in the gas phase, the imidazolidin-2-ylidene-derived BI indeed exists as a diamino enol, while both 1,2,4-triazolin-5-ylidenes and thiazolin-2-ylidenes give the keto tautomer. This result coincides with the tautomeric states observed for the BIs in solution (NMR) and in the crystalline state (XRD), and is in line with our earlier calculations on the energetics of BI keto-enol equilibria.
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Affiliation(s)
- Mathias Paul
- Department of Chemistry, Cologne University, Greinstrasse 4, 50939, Cologne, Germany
| | - Katrin Peckelsen
- Department of Chemistry, Cologne University, Greinstrasse 4, 50939, Cologne, Germany
| | - Thomas Thomulka
- Department of Chemistry, Cologne University, Greinstrasse 4, 50939, Cologne, Germany
| | - Jonathan Martens
- Institute for Molecules and Materials, FELIX Laboratory, Radboud University, Toernooiveld 7, 6525, ED, Nijmegen, The Netherlands
| | - Giel Berden
- Institute for Molecules and Materials, FELIX Laboratory, Radboud University, Toernooiveld 7, 6525, ED, Nijmegen, The Netherlands
| | - Jos Oomens
- Institute for Molecules and Materials, FELIX Laboratory, Radboud University, Toernooiveld 7, 6525, ED, Nijmegen, The Netherlands.,Van' t Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands
| | - Jörg-M Neudörfl
- Department of Chemistry, Cologne University, Greinstrasse 4, 50939, Cologne, Germany
| | - Martin Breugst
- Department of Chemistry, Cologne University, Greinstrasse 4, 50939, Cologne, Germany
| | | | - Mathias Schäfer
- Department of Chemistry, Cologne University, Greinstrasse 4, 50939, Cologne, Germany
| | - Albrecht Berkessel
- Department of Chemistry, Cologne University, Greinstrasse 4, 50939, Cologne, Germany
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23
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Jiang Z, Toffano M, Vo‐Thanh G, Bournaud C. Bifunctional N‐Heterocylic Carbene‐Catalyzed Highly Enantioselective Trans‐Cyclopentannulation of Enals and Enones via Homoenolate. ChemCatChem 2020. [DOI: 10.1002/cctc.202001513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Zhiwei Jiang
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, CNRS UMR 8182 Université Paris-Saclay Rue du doyen Georges Poitou 91405 Orsay Cedex France
| | - Martial Toffano
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, CNRS UMR 8182 Université Paris-Saclay Rue du doyen Georges Poitou 91405 Orsay Cedex France
| | - Giang Vo‐Thanh
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, CNRS UMR 8182 Université Paris-Saclay Rue du doyen Georges Poitou 91405 Orsay Cedex France
| | - Chloée Bournaud
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, CNRS UMR 8182 Université Paris-Saclay Rue du doyen Georges Poitou 91405 Orsay Cedex France
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24
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Meng Q, Döben N, Studer A. Cooperative NHC and Photoredox Catalysis for the Synthesis of β-Trifluoromethylated Alkyl Aryl Ketones. Angew Chem Int Ed Engl 2020; 59:19956-19960. [PMID: 32700458 PMCID: PMC7693039 DOI: 10.1002/anie.202008040] [Citation(s) in RCA: 118] [Impact Index Per Article: 29.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Indexed: 01/12/2023]
Abstract
Despite the great potential of radical chemistry in organic synthesis, N-heterocyclic carbene (NHC)-catalyzed reactions involving radical intermediates are not well explored. This communication reports the three-component coupling of aroyl fluorides, styrenes and the Langlois reagent (CF3 SO2 Na) to give various β-trifluoromethylated alkyl aryl ketones with good functional group tolerance in moderate to high yields by cooperative photoredox/NHC catalysis. The alkene acyltrifluoromethylation proceeds via radical/radical cross coupling of ketyl radicals with benzylic C-radicals. The ketyl radicals are generated via SET reduction of in situ formed acylazolium ions whereas the benzylic radicals derive from trifluoromethyl radical addition onto styrenes.
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Affiliation(s)
- Qing‐Yuan Meng
- Organisch-Chemisches InstitutWestfälische Wilhelms-UniversitätCorrensstrasse 4048149MünsterGermany
| | - Nadine Döben
- Organisch-Chemisches InstitutWestfälische Wilhelms-UniversitätCorrensstrasse 4048149MünsterGermany
| | - Armido Studer
- Organisch-Chemisches InstitutWestfälische Wilhelms-UniversitätCorrensstrasse 4048149MünsterGermany
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25
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26
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Meng Q, Döben N, Studer A. Kooperative NHC‐ und Photoredox‐Katalyse zur Synthese β‐trifluormethylierter Alkylarylketone. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202008040] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Qing‐Yuan Meng
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Corrensstrasse 40 48149 Münster Deutschland
| | - Nadine Döben
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Corrensstrasse 40 48149 Münster Deutschland
| | - Armido Studer
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Corrensstrasse 40 48149 Münster Deutschland
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27
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Deng Q, Meng X. Recent Advances in the Cycloaddition Reactions of 2‐Benzylidene‐1‐benzofuran‐3‐ones, and Their Sulfur, Nitrogen and Methylene Analogues. Chem Asian J 2020; 15:2838-2853. [DOI: 10.1002/asia.202000550] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 07/13/2020] [Indexed: 12/20/2022]
Affiliation(s)
- Qingsong Deng
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion Tianjin Key Laboratory of Drug Targeting and Bioimaging School of Chemistry & Chemical Engineering Tianjin University of Technology Tianjin 300384 P.R. China
| | - Xiangtai Meng
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion Tianjin Key Laboratory of Drug Targeting and Bioimaging School of Chemistry & Chemical Engineering Tianjin University of Technology Tianjin 300384 P.R. China
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28
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Kim J, Oh K. Copper‐Catalyzed Aerobic Oxidation of Amines to Benzothiazoles via Cross Coupling of Amines and Arene Thiolation Sequence. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000598] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Jihyeon Kim
- Center for Metareceptome Research, Graduate School of Pharmaceutical SciencesChung-Ang University, 84 Heukseok-ro, Dongjak Seoul 06974, Republic of Korea
| | - Kyungsoo Oh
- Center for Metareceptome Research, Graduate School of Pharmaceutical SciencesChung-Ang University, 84 Heukseok-ro, Dongjak Seoul 06974, Republic of Korea
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29
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Que Y, He H. Advances in N‐Heterocyclic Carbene Catalysis for Natural Product Synthesis. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000305] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Yonglei Que
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes School of Chemistry and Molecular Engineering East China Normal University 3663 North Zhongshan Road 200062 Shanghai China
| | - Haibing He
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development East China Normal University 3663 North Zhongshan Road 200062 Shanghai China
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30
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Hölzel T, Ganter C. Influence of ring substituents on the electronic properties of 1,2,4-triazolylidenes. J Organomet Chem 2020. [DOI: 10.1016/j.jorganchem.2020.121234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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31
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Yang W, Ling B, Hu B, Yin H, Mao J, Walsh PJ. Synergistic N‐Heterocyclic Carbene/Palladium‐Catalyzed Umpolung 1,4‐Addition of Aryl Iodides to Enals. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201912584] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Wenjun Yang
- Institute of Advanced Synthesis School of Chemistry and Molecular Engineering Nanjing Tech University 30 South Puzhu Road Nanjing 211816 P. R. China
| | - Bo Ling
- Institute of Advanced Synthesis School of Chemistry and Molecular Engineering Nanjing Tech University 30 South Puzhu Road Nanjing 211816 P. R. China
| | - Bowen Hu
- Roy and Diana Vagelos Laboratories Department of Chemistry University of Pennsylvania 231 South 34th Street Philadelphia PA 19104 USA
| | - Haolin Yin
- Roy and Diana Vagelos Laboratories Department of Chemistry University of Pennsylvania 231 South 34th Street Philadelphia PA 19104 USA
| | - Jianyou Mao
- Institute of Advanced Synthesis School of Chemistry and Molecular Engineering Nanjing Tech University 30 South Puzhu Road Nanjing 211816 P. R. China
| | - Patrick J. Walsh
- Roy and Diana Vagelos Laboratories Department of Chemistry University of Pennsylvania 231 South 34th Street Philadelphia PA 19104 USA
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32
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Balanna K, Madica K, Mukherjee S, Ghosh A, Poisson T, Besset T, Jindal G, Biju AT. N-Heterocyclic Carbene-Catalyzed Formal [6+2] Annulation Reaction via Cross-Conjugated Aza-Trienolate Intermediates. Chemistry 2019; 26:818-822. [PMID: 31765059 DOI: 10.1002/chem.201905177] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Indexed: 01/17/2023]
Abstract
The diverse reactivity of N-heterocyclic carbenes (NHCs) in organocatalysis is due to the possibility of different modes of action. Although NHC-bound enolates and dienolates are known, the related NHC-bound cross-conjugated aza-trienolates remain elusive. Herein, we demonstrate the NHC-catalyzed formal [6+2] annulation of nitrogen-containing heterocyclic aldehydes with α,α,α-trifluoroacetophenones leading to the formation of versatile pyrrolooxazolones (29 examples). The catalytically generated cross-conjugated aza-trienolates (aza-fulvene type) underwent smooth [6+2] annulation with electrophilic ketones to afford the product in moderate to good yields under mild conditions. Preliminary DFT studies on the mechanism are also provided.
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Affiliation(s)
- Kuruva Balanna
- Department of Organic Chemistry, Indian Institute of Science, Bangalore, 560012, India
| | - Krishnaprasad Madica
- Department of Organic Chemistry, Indian Institute of Science, Bangalore, 560012, India
| | - Subrata Mukherjee
- Department of Organic Chemistry, Indian Institute of Science, Bangalore, 560012, India
| | - Arghya Ghosh
- Department of Organic Chemistry, Indian Institute of Science, Bangalore, 560012, India
| | - Thomas Poisson
- Institut Universitaire de France, 1 rue Descartes, 75231, Paris, France.,INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014), Normandie Univ, 76000, Rouen, France
| | - Tatiana Besset
- INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014), Normandie Univ, 76000, Rouen, France
| | - Garima Jindal
- Department of Organic Chemistry, Indian Institute of Science, Bangalore, 560012, India
| | - Akkattu T Biju
- Department of Organic Chemistry, Indian Institute of Science, Bangalore, 560012, India
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33
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Yang W, Ling B, Hu B, Yin H, Mao J, Walsh PJ. Synergistic N‐Heterocyclic Carbene/Palladium‐Catalyzed Umpolung 1,4‐Addition of Aryl Iodides to Enals. Angew Chem Int Ed Engl 2019; 59:161-166. [DOI: 10.1002/anie.201912584] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Indexed: 01/23/2023]
Affiliation(s)
- Wenjun Yang
- Institute of Advanced Synthesis School of Chemistry and Molecular Engineering Nanjing Tech University 30 South Puzhu Road Nanjing 211816 P. R. China
| | - Bo Ling
- Institute of Advanced Synthesis School of Chemistry and Molecular Engineering Nanjing Tech University 30 South Puzhu Road Nanjing 211816 P. R. China
| | - Bowen Hu
- Roy and Diana Vagelos Laboratories Department of Chemistry University of Pennsylvania 231 South 34th Street Philadelphia PA 19104 USA
| | - Haolin Yin
- Roy and Diana Vagelos Laboratories Department of Chemistry University of Pennsylvania 231 South 34th Street Philadelphia PA 19104 USA
| | - Jianyou Mao
- Institute of Advanced Synthesis School of Chemistry and Molecular Engineering Nanjing Tech University 30 South Puzhu Road Nanjing 211816 P. R. China
| | - Patrick J. Walsh
- Roy and Diana Vagelos Laboratories Department of Chemistry University of Pennsylvania 231 South 34th Street Philadelphia PA 19104 USA
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34
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Liu C, Wu S, Xu J, Chen L, Zheng P, Chi YR. Carbene-Catalyzed Enantioselective Addition of Thioamides to Bromoenals for Access to Thiazinone Heterocycles. Org Lett 2019; 21:9493-9496. [PMID: 31742417 DOI: 10.1021/acs.orglett.9b03685] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
A carbene-catalyzed reaction between α-bromoenals and thioamides was developed. Key steps include enantioselective 1,4-addition of thioamide sulfur atoms to α,β-unsaturated acyl azolium intermediate. Subsequent intramolecular annulation eventually affords thiazinone heterocycles with high optical purities. The introduction of Lewis acid additives such as Cu(OTf)2 to this NHC catalytic reaction could provide small but consistent improvements to reaction enantioselectivities.
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Affiliation(s)
- Changyi Liu
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education , Guizhou University , Huaxi District , Guiyang 550025 , China
| | - Shuquan Wu
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education , Guizhou University , Huaxi District , Guiyang 550025 , China
| | - Jun Xu
- Guizhou University of Traditional Chinese Medicine , Guiyang 550025 , China.,Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences , Nanyang Technological University , Singapore 637371 , Singapore
| | - Lingzhu Chen
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education , Guizhou University , Huaxi District , Guiyang 550025 , China
| | - Pengcheng Zheng
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education , Guizhou University , Huaxi District , Guiyang 550025 , China
| | - Yonggui Robin Chi
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education , Guizhou University , Huaxi District , Guiyang 550025 , China.,Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences , Nanyang Technological University , Singapore 637371 , Singapore
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35
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Sun S, Lang M, Wang J. N‐Heterocyclic Carbene‐Catalyzed
β
‐Indolylation of
α
‐Bromoenals with Indoles. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900699] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Shaofa Sun
- College of Chemistry and Biological SciencesHubei University of Science and Technology Hubei 437100 People's Republic of China
| | - Ming Lang
- School of Pharmaceutical SciencesTsinghua University Beijing 100084 People's Republic of China
| | - Jian Wang
- School of Pharmaceutical SciencesTsinghua University Beijing 100084 People's Republic of China
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36
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Wu S, Liu C, Luo G, Jin Z, Zheng P, Chi YR. NHC‐Catalyzed Chemoselective Reactions of Enals and Aminobenzaldehydes for Access to Chiral Dihydroquinolines. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201909479] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Shuquan Wu
- Laboratory Breeding Base of Green Pesticide and Agricultural BioengineeringKey Laboratory of Green Pesticide and Agricultural BioengineeringMinistry of EducationGuizhou University Guiyang 550025 China
| | - Changyi Liu
- Laboratory Breeding Base of Green Pesticide and Agricultural BioengineeringKey Laboratory of Green Pesticide and Agricultural BioengineeringMinistry of EducationGuizhou University Guiyang 550025 China
| | - Guoyong Luo
- School of PharmacyGuizhou University of Traditional Chinese Medicine Guiyang 550025 China
| | - Zhichao Jin
- Laboratory Breeding Base of Green Pesticide and Agricultural BioengineeringKey Laboratory of Green Pesticide and Agricultural BioengineeringMinistry of EducationGuizhou University Guiyang 550025 China
| | - Pengcheng Zheng
- Laboratory Breeding Base of Green Pesticide and Agricultural BioengineeringKey Laboratory of Green Pesticide and Agricultural BioengineeringMinistry of EducationGuizhou University Guiyang 550025 China
| | - Yonggui Robin Chi
- Laboratory Breeding Base of Green Pesticide and Agricultural BioengineeringKey Laboratory of Green Pesticide and Agricultural BioengineeringMinistry of EducationGuizhou University Guiyang 550025 China
- Division of Chemistry & Biological ChemistrySchool of Physical & Mathematical SciencesNanyang Technological University Singapore 637371 Singapore
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37
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Wu S, Liu C, Luo G, Jin Z, Zheng P, Chi YR. NHC-Catalyzed Chemoselective Reactions of Enals and Aminobenzaldehydes for Access to Chiral Dihydroquinolines. Angew Chem Int Ed Engl 2019; 58:18410-18413. [PMID: 31604001 DOI: 10.1002/anie.201909479] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2019] [Revised: 09/21/2019] [Indexed: 12/31/2022]
Abstract
An N-heterocyclic carbene (NHC)-catalyzed reaction between α-bromoenals and 2-aminoaldehydes has been developed. Key steps include chemoselective reaction of the NHC catalyst with one of the aldehyde substrates (the bromoenal) to eventually generate an α,β-unsaturated acylazolium intermediate. Addition of the nitrogen atom of aminoaldehyde to the unsaturated azolium ester intermediate followed by intramolecular aldol reaction, β-lactone formation, and decarboxylation leads to chiral dihydroquinolines with high optical purity. The dihydroquinoline products, which are quickly prepared by using this method, can be readily transformed into a diverse set of functional molecules such as pyridines and chiral piperidines.
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Affiliation(s)
- Shuquan Wu
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang, 550025, China
| | - Changyi Liu
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang, 550025, China
| | - Guoyong Luo
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang, 550025, China
| | - Zhichao Jin
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang, 550025, China
| | - Pengcheng Zheng
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang, 550025, China
| | - Yonggui Robin Chi
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang, 550025, China.,Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
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38
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Ghazvini HJ, Armaghan M, Janiak C, Balalaie S, Müller TJJ. Coupling‐Isomerization‐Cycloisomerization Reaction (CICIR) – An Unexpected and Efficient Domino Approach to Luminescent 2‐(Hydroxymethylene)indenones. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901413] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Helya Janatian Ghazvini
- Institut für Organische Chemie und Makromolekular Chemie Heinrich‐Heine‐Universität Düsseldorf Universitätsstraße 1 40225 Düsseldorf Germany
- Peptide Chemistry Research Center K. N. Toosi University of Technology P. O. Box 15875‐4416 Tehran Iran
| | - Mahsa Armaghan
- Institut für Anorganische Chemie und Strukturchemie Heinrich‐Heine‐Universität Düsseldorf Universitätsstraße 1 40225 Düsseldorf Germany
| | - Christoph Janiak
- Institut für Anorganische Chemie und Strukturchemie Heinrich‐Heine‐Universität Düsseldorf Universitätsstraße 1 40225 Düsseldorf Germany
| | - Saeed Balalaie
- Peptide Chemistry Research Center K. N. Toosi University of Technology P. O. Box 15875‐4416 Tehran Iran
| | - Thomas J. J. Müller
- Institut für Organische Chemie und Makromolekular Chemie Heinrich‐Heine‐Universität Düsseldorf Universitätsstraße 1 40225 Düsseldorf Germany
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39
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Zhang Z, Zhang L, Geng R, Song J, Chen X, Gong L. N‐Heterocyclic Carbene/Copper Cooperative Catalysis for the Asymmetric Synthesis of Spirooxindoles. Angew Chem Int Ed Engl 2019; 58:12190-12194. [DOI: 10.1002/anie.201907188] [Citation(s) in RCA: 107] [Impact Index Per Article: 21.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2019] [Indexed: 01/05/2023]
Affiliation(s)
- Zi‐Jing Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Ling Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Rui‐Long Geng
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Jin Song
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Xiao‐Hua Chen
- Shanghai Institute of Materia MedicaChinese Academy of Sciences Shanghai 201203 China
| | - Liu‐Zhu Gong
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
- Center for Excellence in Molecular Synthesis of CAS Hefei, 230026 China
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40
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Bae S, Zhang C, Gillard RM, Lupton DW. Enantioselective N‐Heterocyclic Carbene Catalyzed Bis(enoate) Rauhut–Currier Reaction. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201907111] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Song Bae
- School of Chemistry Monash University Clayton 3800 Victoria Australia
| | - Changhe Zhang
- School of Chemistry Monash University Clayton 3800 Victoria Australia
| | - Rachel M. Gillard
- School of Chemistry Monash University Clayton 3800 Victoria Australia
| | - David W. Lupton
- School of Chemistry Monash University Clayton 3800 Victoria Australia
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41
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Bae S, Zhang C, Gillard RM, Lupton DW. Enantioselective N‐Heterocyclic Carbene Catalyzed Bis(enoate) Rauhut–Currier Reaction. Angew Chem Int Ed Engl 2019; 58:13370-13374. [DOI: 10.1002/anie.201907111] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Revised: 07/15/2019] [Indexed: 12/22/2022]
Affiliation(s)
- Song Bae
- School of Chemistry Monash University Clayton 3800 Victoria Australia
| | - Changhe Zhang
- School of Chemistry Monash University Clayton 3800 Victoria Australia
| | - Rachel M. Gillard
- School of Chemistry Monash University Clayton 3800 Victoria Australia
| | - David W. Lupton
- School of Chemistry Monash University Clayton 3800 Victoria Australia
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42
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Nguyen XB, Nakano Y, Duggan NM, Scott L, Breugst M, Lupton DW. N‐Heterocyclic Carbene Catalyzed (5+1) Annulations Exploiting a Vinyl Dianion Synthon Strategy. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201905475] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Xuan B. Nguyen
- School of Chemistry Monash University Clayton 3800 Victoria Australia
| | - Yuji Nakano
- School of Chemistry Monash University Clayton 3800 Victoria Australia
| | | | - Lydia Scott
- School of Chemistry Monash University Clayton 3800 Victoria Australia
| | - Martin Breugst
- Department für Chemie Universität zu Köln Greinstraße 4 50939 Köln Germany
| | - David W. Lupton
- School of Chemistry Monash University Clayton 3800 Victoria Australia
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43
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Paul M, Neudörfl JM, Berkessel A. Breslow Intermediates from a Thiazolin-2-ylidene and Fluorinated Aldehydes: XRD and Solution-Phase NMR Spectroscopic Characterization. Angew Chem Int Ed Engl 2019; 58:10596-10600. [PMID: 31131519 DOI: 10.1002/anie.201904308] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Revised: 05/20/2019] [Indexed: 12/20/2022]
Abstract
The first generation and X-ray diffraction (XRD) analysis of a crystalline Breslow intermediate (BI) derived from a thiazolin-2-ylidene, that is, the aromatic heterocycle present in vitamin B1 , is reported. Key to success was the combined use of pentafluorobenzaldehyde and a thiazolin-2-ylidene carrying an enol-stabilizing dispersion energy donor as N-substituent. A so-called primary intermediate (PI) could be isolated in protonated form (pPI) as well and analyzed by XRD. Furthermore, the first stable BI derived from an aromatic thiazolin-2-ylidene and an aliphatic aldehyde (trifluoroacetaldehyde) was prepared and characterized by NMR spectroscopy in solution. When switching to a saturated thiazolidin-2-ylidene, reaction with pentafluorobenzaldehyde afforded a new BI in solution (NMR spectroscopy). Attempts to crystallize the latter BI resulted in the isolation of a novel thiazolidin-2-ylidene dimer that had undergone rearrangement to a hexahydro[1,4]-thiazino[3,2-b]-1,4-thiazine.
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Affiliation(s)
- Mathias Paul
- Cologne University, Department of Chemistry, Greinstrasse 4, 50939, Cologne, Germany
| | - Jörg-M Neudörfl
- Cologne University, Department of Chemistry, Greinstrasse 4, 50939, Cologne, Germany
| | - Albrecht Berkessel
- Cologne University, Department of Chemistry, Greinstrasse 4, 50939, Cologne, Germany
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44
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Zhang Z, Zhang L, Geng R, Song J, Chen X, Gong L. N‐Heterocyclic Carbene/Copper Cooperative Catalysis for the Asymmetric Synthesis of Spirooxindoles. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201907188] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Zi‐Jing Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Ling Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Rui‐Long Geng
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Jin Song
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Xiao‐Hua Chen
- Shanghai Institute of Materia MedicaChinese Academy of Sciences Shanghai 201203 China
| | - Liu‐Zhu Gong
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
- Center for Excellence in Molecular Synthesis of CAS Hefei, 230026 China
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45
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Yoshida Y, Omori K, Hiroshige T, Mino T, Sakamoto M. Chemoselective Catalytic Asymmetric Synthesis of Functionalized Aminals Through the Umpolung Organocascade Reaction of α‐Imino Amides. Chem Asian J 2019; 14:2737-2743. [DOI: 10.1002/asia.201900764] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Indexed: 12/15/2022]
Affiliation(s)
- Yasushi Yoshida
- Molecular Chirality Research CenterGraduate School of Science and EngineeringChiba University 1–33, Yayoi-cho Inage-ku, Chiba-shi Chiba 263-8522 Japan
| | - Kazuki Omori
- Molecular Chirality Research CenterGraduate School of Science and EngineeringChiba University 1–33, Yayoi-cho Inage-ku, Chiba-shi Chiba 263-8522 Japan
| | - Tomohiko Hiroshige
- Molecular Chirality Research CenterGraduate School of Science and EngineeringChiba University 1–33, Yayoi-cho Inage-ku, Chiba-shi Chiba 263-8522 Japan
| | - Takashi Mino
- Molecular Chirality Research CenterGraduate School of Science and EngineeringChiba University 1–33, Yayoi-cho Inage-ku, Chiba-shi Chiba 263-8522 Japan
| | - Masami Sakamoto
- Molecular Chirality Research CenterGraduate School of Science and EngineeringChiba University 1–33, Yayoi-cho Inage-ku, Chiba-shi Chiba 263-8522 Japan
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46
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Nguyen XB, Nakano Y, Duggan NM, Scott L, Breugst M, Lupton DW. N‐Heterocyclic Carbene Catalyzed (5+1) Annulations Exploiting a Vinyl Dianion Synthon Strategy. Angew Chem Int Ed Engl 2019; 58:11483-11490. [DOI: 10.1002/anie.201905475] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Indexed: 12/22/2022]
Affiliation(s)
- Xuan B. Nguyen
- School of Chemistry Monash University Clayton 3800 Victoria Australia
| | - Yuji Nakano
- School of Chemistry Monash University Clayton 3800 Victoria Australia
| | | | - Lydia Scott
- School of Chemistry Monash University Clayton 3800 Victoria Australia
| | - Martin Breugst
- Department für Chemie Universität zu Köln Greinstraße 4 50939 Köln Germany
| | - David W. Lupton
- School of Chemistry Monash University Clayton 3800 Victoria Australia
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47
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Paul M, Neudörfl J, Berkessel A. Breslow Intermediates from a Thiazolin‐2‐ylidene and Fluorinated Aldehydes: XRD and Solution‐Phase NMR Spectroscopic Characterization. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201904308] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Mathias Paul
- Cologne UniversityDepartment of Chemistry Greinstrasse 4 50939 Cologne Germany
| | - Jörg‐M. Neudörfl
- Cologne UniversityDepartment of Chemistry Greinstrasse 4 50939 Cologne Germany
| | - Albrecht Berkessel
- Cologne UniversityDepartment of Chemistry Greinstrasse 4 50939 Cologne Germany
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48
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Takahashi S, Bellan E, Baceiredo A, Saffon‐Merceron N, Massou S, Nakata N, Hashizume D, Branchadell V, Kato T. A Stable N‐Hetero
‐Rh
‐Metallacyclic Silylene. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201904594] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Shintaro Takahashi
- Department of ChemistryGraduate School of Science and EngineeringSaitama University, Shimo-okubo Sakura-ku Saitama 338-8570 Japan
| | - Ekaterina Bellan
- Laboratoire Hétérochimie Fondamentale et Appliquée (UMR 5069)Université de Toulouse, CNRS 118 route de Narbonne 31062 Toulouse France
| | - Antoine Baceiredo
- Laboratoire Hétérochimie Fondamentale et Appliquée (UMR 5069)Université de Toulouse, CNRS 118 route de Narbonne 31062 Toulouse France
| | - Nathalie Saffon‐Merceron
- Institut de Chimie de Toulouse (FR 2599)Université de Toulouse, CNRS 118 route de Narbonne 31062 Toulouse France
| | - Stéphane Massou
- Institut de Chimie de Toulouse (FR 2599)Université de Toulouse, CNRS 118 route de Narbonne 31062 Toulouse France
| | - Norio Nakata
- Department of ChemistryGraduate School of Science and EngineeringSaitama University, Shimo-okubo Sakura-ku Saitama 338-8570 Japan
| | - Daisuke Hashizume
- RIKEN Center for Emergent Matter Science (CEMS) 2-1 Hirosawa Wako Saitama 351-0198 Japan
| | - Vicenç Branchadell
- Departament de QuímicaUniversitat Autònoma de Barcelona 08193 Bellaterra Spain
| | - Tsuyoshi Kato
- Laboratoire Hétérochimie Fondamentale et Appliquée (UMR 5069)Université de Toulouse, CNRS 118 route de Narbonne 31062 Toulouse France
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49
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Takahashi S, Bellan E, Baceiredo A, Saffon-Merceron N, Massou S, Nakata N, Hashizume D, Branchadell V, Kato T. A Stable N-Hetero-Rh-Metallacyclic Silylene. Angew Chem Int Ed Engl 2019; 58:10310-10314. [PMID: 31132319 DOI: 10.1002/anie.201904594] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2019] [Revised: 05/27/2019] [Indexed: 01/07/2023]
Abstract
A cyclic (amino)metal-substituted dicoordinated silylene derivative has been synthesized and fully characterized. Of particular interest is that the N-hetero-RhI -metallacyclic silylene exhibits a distorted tetrahedral geometry around the rhodium atom and a considerably shortened Si-Rh bond (2.138 Å) compared to classical Si-Rh single bonds (ca. 2.30-2.35 Å). A theoretical investigation reveals that the geometrical deviation around the rhodium center from the classical square-planar to a tetrahedral geometry increases the π-donating and σ-accepting character of the rhodium atom, thereby efficiently stabilizing the silylene moiety.
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Affiliation(s)
- Shintaro Takahashi
- Department of Chemistry, Graduate School of Science and Engineering, Saitama University, Shimo-okubo, Sakura-ku, Saitama, 338-8570, Japan
| | - Ekaterina Bellan
- Laboratoire Hétérochimie Fondamentale et Appliquée (UMR 5069), Université de Toulouse, CNRS, 118 route de Narbonne, 31062, Toulouse, France
| | - Antoine Baceiredo
- Laboratoire Hétérochimie Fondamentale et Appliquée (UMR 5069), Université de Toulouse, CNRS, 118 route de Narbonne, 31062, Toulouse, France
| | - Nathalie Saffon-Merceron
- Institut de Chimie de Toulouse (FR 2599), Université de Toulouse, CNRS, 118 route de Narbonne, 31062, Toulouse, France
| | - Stéphane Massou
- Institut de Chimie de Toulouse (FR 2599), Université de Toulouse, CNRS, 118 route de Narbonne, 31062, Toulouse, France
| | - Norio Nakata
- Department of Chemistry, Graduate School of Science and Engineering, Saitama University, Shimo-okubo, Sakura-ku, Saitama, 338-8570, Japan
| | - Daisuke Hashizume
- RIKEN Center for Emergent Matter Science (CEMS), 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
| | - Vicenç Branchadell
- Departament de Química, Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain
| | - Tsuyoshi Kato
- Laboratoire Hétérochimie Fondamentale et Appliquée (UMR 5069), Université de Toulouse, CNRS, 118 route de Narbonne, 31062, Toulouse, France
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50
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Balaboina R, Thirukovela N, Kankala S, Balasubramanian S, Bathula SR, Vadde R, Jonnalagadda SB, Vasam CS. Synergistic Catalysis of Ag(I) and Organo‐
N
‐heterocyclic Carbenes: One‐Pot Synthesis of New Anticancer Spirooxindole‐1,4‐dihydropyridines. ChemistrySelect 2019. [DOI: 10.1002/slct.201803507] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Ramesh Balaboina
- Department of ChemistryKakatiya University Warangal- 506009, Telangana State India
| | | | - Shravankumar Kankala
- Department of ChemistryKakatiya University Warangal- 506009, Telangana State India
| | - Sridhar Balasubramanian
- X-ray Crystallography DivisionCSIR–Indian Institute of Chemical Technology Hyderabad- 500007, Telangana State India
| | - Surendar Reddy Bathula
- Division of Natural Product ChemistryCSIR-Indian Institute of Chemical Technology Hyderabad- 500007, Telangana State India
| | - Ravinder Vadde
- Department of ChemistryKakatiya University Warangal- 506009, Telangana State India
| | - Sreekantha B Jonnalagadda
- School of Chemistry and PhysicsUniversity of Kwazulu-NatalWestville Campus, Chiltern Hills, Durban- 4000, South Africa
| | - Chandra Sekhar Vasam
- Department of Pharmaceutical ChemistryTelangana University Nizamabad- 503322, Telangana State India
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