1
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Bakthadoss M, Aina OS, Reddy TT, Izunobi JU, Familoni OB. Mono and di ortho-C-H acetoxylation of 2-aryloxyquinoline-3-carbaldehydes. RSC Adv 2024; 14:13306-13310. [PMID: 38655482 PMCID: PMC11037237 DOI: 10.1039/d4ra01289e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Accepted: 04/08/2024] [Indexed: 04/26/2024] Open
Abstract
2-Aryloxyquinolines are well known for various biological activities. In this report, we have developed a novel protocol for introducing an acetoxy functional group on the aryl sp2 carbon of 2-aryloxyquinoline-3-carbaldehyde using a palladium catalyst for the first time. Interestingly, this C-H acetoxylation reaction is highly chemo- and site-selective. By modifying the reaction conditions, mono or di ortho-C-H acetoxylation products have been synthesized selectively with good yields and with good functional group tolerance.
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Affiliation(s)
| | - Oluwafemi S Aina
- Department of Chemistry, Pondicherry University Pondicherry 605 014 India
- Department of Chemistry, University of Lagos Lagos Nigeria
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2
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Bakthadoss M, Reddy TT. Distal meta-C-H functionalization of α-substituted cinnamates. Chem Sci 2023; 14:5880-5886. [PMID: 37293646 PMCID: PMC10246684 DOI: 10.1039/d2sc06206b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Accepted: 02/20/2023] [Indexed: 11/03/2023] Open
Abstract
Development of a novel strategy for the palladium-catalyzed selective meta-C-H activation of α-substituted cinnamates and their heterocyclic analogues with various alkenes using nitrile as a directing group (DG) has been described. Importantly, we introduced naphthoquinone, benzoquinones, maleimides and sulfolene as coupling partners in the meta-C-H activation reaction for the first time. Notably, allylation, acetoxylation and cyanation were also achieved through distal meta-C-H functionalization. This novel protocol also includes the coupling of various olefin-tethered bioactive molecules with high selectivity.
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3
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Chen S, Yang Y, Chen C, Wang C. Advances in Transition-Metal-Catalyzed Keto Carbonyl-Directed C—H Bond Functionalization Reactions. CHINESE J ORG CHEM 2023. [DOI: 10.6023/cjoc202205033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
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4
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Bakthadoss M, Reddy TT, Agarwal V, Sharada DS. Ester-directed orthogonal dual C-H activation and ortho aryl C-H alkenylation via distal weak coordination. Chem Commun (Camb) 2022; 58:1406-1409. [PMID: 34994762 DOI: 10.1039/d1cc06097j] [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
An unprecedented orthogonal cross-coupling between aromatic C(sp2) and aliphatic olefinic C(sp2) carbons of two same molecules via dual C-H bond activation in an intermolecular fashion has been developed using a distal ester-directing group. This new coupling reaction led to the synthesis of the highly functionalized 1,3-diaryl molecular architecture in very good yields and with high chemo- and regioselectivities. In addition, using ester as the distal directing group, ortho C-H olefination of α-methyl aryl acrylates and cinnamic esters with various alkenes has been achieved in very good yields and with a wide range of substrate scope.
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Affiliation(s)
| | | | - Vishal Agarwal
- Department of Chemistry, Pondicherry University, Pondicherry-605014, India.
| | - Duddu S Sharada
- Department of Chemistry, Indian Institute of Technology, Hyderabad, Telangana-502285, India
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5
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Bakthadoss M, Reddy TT, Sharada DS. Ruthenium-catalyzed, site-selective C-H activation: access to C5-substituted azaflavanone. RSC Adv 2020; 10:31570-31574. [PMID: 35520642 PMCID: PMC9056431 DOI: 10.1039/d0ra06580c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Accepted: 08/17/2020] [Indexed: 11/21/2022] Open
Abstract
A site-selective ruthenium-catalyzed keto group assisted C–H bond activation of 2-aryl tetrahydroquinoline (azaflavanone) derivatives has been achieved with a variety of alkenes for the first time. A wide range of substrates was utilized for the synthesis of a wide variety of alkenylated azaflavanones. This simple and efficient protocol provides the C5-substituted azaflavanone derivatives in high yields with a broad range of functional group tolerance. Further, the C5-alkenylated products were converted into substituted 2-aryl quinoline derivatives in good yields. A site-selective ruthenium-catalyzed keto group assisted C–H bond activation of 2-aryl tetrahydroquinoline (azaflavanone) derivatives has been achieved with a variety of alkenes for the first time.![]()
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Affiliation(s)
| | | | - Duddu S Sharada
- Department of Chemistry, Indian Institute of Technology Hyderabad Telangana-502285 India
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6
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Mahesha CK, Mandal SK, Sakhuja R. Indazolone‐Assisted Sequential
ortho
‐Alkenylation‐Oxidative Aza‐Michael Addition of 1‐Arylindazolone Using Acrylates Under Ru(II) Catalysis. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000239] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | - Sanjay K. Mandal
- Department of Chemical SciencesIndian Institute of Science Education and Research Mohali Sector 81, SAS Nagar, Manuali P.O., Mohali Punjab 140306 India
| | - Rajeev Sakhuja
- Department of ChemistryBirla Institute of Technology and Science, Pilani Rajasthan 333031 India
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7
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Bakthadoss M, Agarwal V, Tadiparthi TR, Mohammad M. Domino ring opening and selective O/S-alkylation of cyclic ethers and thioethers. Mol Divers 2020; 25:2467-2478. [PMID: 32462464 DOI: 10.1007/s11030-020-10105-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 05/13/2020] [Indexed: 10/24/2022]
Abstract
Chemoselective domino ring opening and selective O/S-alkylation of ethers/thioethers over enol C/O alkylation has been observed. Various 2-aryl chromanones/thiochromanones with alkyl/allyl bromides were smoothly converted into the corresponding highly functionalized ethers and thioethers in excellent yields with high selectivity. An unusual, chemoselective domino ring opening and selective ether/thioether O/S-alkylation over. An unusual, chemoselective domino ring opening and selective ether/thioether O/S alkylation over enol C/O alkylation has been observed.
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Affiliation(s)
- Manickam Bakthadoss
- Department of Chemistry, Pondicherry University, Pondicherry, 605 014, India.
| | - Vishal Agarwal
- Department of Chemistry, Pondicherry University, Pondicherry, 605 014, India
| | | | - Mushaf Mohammad
- Department of Chemistry, Pondicherry University, Pondicherry, 605 014, India
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8
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Dethe DH, C B N, Bhat AA. Cp*Co(III)-Catalyzed Ketone-Directed ortho-C-H Activation for the Synthesis of Indene Derivatives. J Org Chem 2020; 85:7565-7575. [PMID: 32364736 DOI: 10.1021/acs.joc.0c00727] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
A weakly coordinating, carbonyl-assisted C-H activation of aromatic systems with α,β-unsaturated ketone and subsequent aldol condensation has been developed using a Cp*Co(CO)I2 catalyst. The developed method is the first example of indene synthesis by cobalt-catalyzed C-H activation. In addition, the reaction requires mild reaction conditions and easily accessible starting materials, and it shows excellent functional group compatibility.
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Affiliation(s)
- Dattatraya H Dethe
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Nagabhushana C B
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Arsheed Ahmad Bhat
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
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9
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Chen W, Li HJ, Li QY, Wu YC. Direct oxidative coupling of N-acyl pyrroles with alkenes by ruthenium(ii)-catalyzed regioselective C2-alkenylation. Org Biomol Chem 2020; 18:500-513. [PMID: 31850444 DOI: 10.1039/c9ob02421b] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ruthenium(ii)-catalyzed oxidative coupling by C2-alkenylation of N-acyl pyrroles with alkenes has been described. The acyl unit was found to be an effective chelating group for the activation of aryl C-H bonds ortho to the directing group. The alkenylation reaction of benzoyl pyrroles occurred regioselectively at the C2-position of the pyrrole ring, without touching the benzene ring. The reaction provides exclusively monosubstituted pyrroles under the optimized conditions. Disubstituted pyrroles could be obtained using higher loadings of the ruthenium(ii)-catalyst and the additives.
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Affiliation(s)
- Weiqiang Chen
- School of Marine Science and Technology, Harbin Institute of Technology, 2 Weihai Road, Weihai 264209, P. R. China.
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10
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Bakthadoss M, Jayakumar S, Raman S, Devaraj A, Sharada DS. A novel multicomponent quadruple/double quadruple domino reaction: highly efficient synthesis of polyheterocyclic architectures. Org Biomol Chem 2019; 17:3884-3893. [PMID: 30574986 DOI: 10.1039/c8ob02970a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel multicomponent quadruple domino reaction (MCQDR) for the assembly of structurally complex molecular architectures via the formation of three rings and three contiguous stereogenic centers has been accomplished with high regio- and diastereoselectivity. Solvents, catalysts and work-up were not required to obtain the target molecules. In addition, this new protocol is also extended for the multicomponent double quadruple domino reaction (MCDQDR) to create novel polyheterocyclic architectures in an orthogonal manner.
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Affiliation(s)
- Manickam Bakthadoss
- Department of Chemistry, Pondicherry University, Puducherry - 605 014, India.
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11
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Dias GG, Nascimento TAD, de Almeida AKA, Bombaça ACS, Menna-Barreto RFS, Jacob C, Warratz S, da Silva Júnior EN, Ackermann L. Ruthenium(II)-Catalyzed C-H Alkenylation of Quinones: Diversity-Oriented Strategy for Trypanocidal Compounds. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900004] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Gleiston G. Dias
- Institute of Exact Sciences; Department of Chemistry; Federal University of Minas Gerais; UFMG 31270-901 Belo Horizonte, MG Brazil
- Institut für Organische und Biomolekulare Chemie; Georg-August-Universität Göttingen; Tammannstraße 2 37077 Göttingen Germany
| | - Tamires A. do Nascimento
- Institute of Chemistry and Biotechnology; Federal University of Alagoas; UFMG 31270-901 Belo Horizonte, MG Brazil
| | - Andresa K. A. de Almeida
- Institute of Chemistry and Biotechnology; Federal University of Alagoas; UFMG 31270-901 Belo Horizonte, MG Brazil
| | | | | | - Claus Jacob
- Division of Bioorganic Chemistry; School of Pharmacy; Saarland University; 66123 Saarbrücken Germany
| | - Svenja Warratz
- Institut für Organische und Biomolekulare Chemie; Georg-August-Universität Göttingen; Tammannstraße 2 37077 Göttingen Germany
| | - Eufrânio N. da Silva Júnior
- Institute of Exact Sciences; Department of Chemistry; Federal University of Minas Gerais; UFMG 31270-901 Belo Horizonte, MG Brazil
- Institut für Organische und Biomolekulare Chemie; Georg-August-Universität Göttingen; Tammannstraße 2 37077 Göttingen Germany
| | - Lutz Ackermann
- Institut für Organische und Biomolekulare Chemie; Georg-August-Universität Göttingen; Tammannstraße 2 37077 Göttingen Germany
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12
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Bakthadoss M, Kumar PV, Kumar R, Surendar M, Sharada DS. Ruthenium catalyzed chemo and site-selective C–H amidation of oxobenzoxazine derivatives with sulfonyl azides. NEW J CHEM 2019. [DOI: 10.1039/c9nj02452b] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A novel and general protocol towards the synthesis of highly functionalized ortho-amido oxobenzoxazine frameworks via ruthenium catalyzed intermolecular C–H amidation using sulfonyl azides as amidation components has been developed for the first time.
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Affiliation(s)
| | - Polu Vijay Kumar
- Department of Chemistry
- Pondicherry University
- Pondicherry – 605 014
- India
| | - Ravan Kumar
- Department of Chemistry
- Pondicherry University
- Pondicherry – 605 014
- India
| | - Manickam Surendar
- Department of Chemistry
- Pondicherry University
- Pondicherry – 605 014
- India
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13
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Sambiagio C, Schönbauer D, Blieck R, Dao-Huy T, Pototschnig G, Schaaf P, Wiesinger T, Zia MF, Wencel-Delord J, Besset T, Maes BUW, Schnürch M. A comprehensive overview of directing groups applied in metal-catalysed C-H functionalisation chemistry. Chem Soc Rev 2018; 47:6603-6743. [PMID: 30033454 PMCID: PMC6113863 DOI: 10.1039/c8cs00201k] [Citation(s) in RCA: 1087] [Impact Index Per Article: 181.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Indexed: 12/20/2022]
Abstract
The present review is devoted to summarizing the recent advances (2015-2017) in the field of metal-catalysed group-directed C-H functionalisation. In order to clearly showcase the molecular diversity that can now be accessed by means of directed C-H functionalisation, the whole is organized following the directing groups installed on a substrate. Its aim is to be a comprehensive reference work, where a specific directing group can be easily found, together with the transformations which have been carried out with it. Hence, the primary format of this review is schemes accompanied with a concise explanatory text, in which the directing groups are ordered in sections according to their chemical structure. The schemes feature typical substrates used, the products obtained as well as the required reaction conditions. Importantly, each example is commented on with respect to the most important positive features and drawbacks, on aspects such as selectivity, substrate scope, reaction conditions, directing group removal, and greenness. The targeted readership are both experts in the field of C-H functionalisation chemistry (to provide a comprehensive overview of the progress made in the last years) and, even more so, all organic chemists who want to introduce the C-H functionalisation way of thinking for a design of straightforward, efficient and step-economic synthetic routes towards molecules of interest to them. Accordingly, this review should be of particular interest also for scientists from industrial R&D sector. Hence, the overall goal of this review is to promote the application of C-H functionalisation reactions outside the research groups dedicated to method development and establishing it as a valuable reaction archetype in contemporary R&D, comparable to the role cross-coupling reactions play to date.
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Affiliation(s)
- Carlo Sambiagio
- Organic Synthesis (ORSY)
, Department of Chemistry
, University of Antwerp
,
Groenenborgerlaan 171
, 2020 Antwerp
, Belgium
| | - David Schönbauer
- Institute of Applied Synthetic Chemistry
, TU Wien
,
Getreidemarkt 9/163
, A-1060 Vienna
, Austria
.
| | - Remi Blieck
- Normandie Univ
, INSA Rouen
, UNIROUEN
, CNRS
, COBRA (UMR 6014)
,
76000 Rouen
, France
| | - Toan Dao-Huy
- Institute of Applied Synthetic Chemistry
, TU Wien
,
Getreidemarkt 9/163
, A-1060 Vienna
, Austria
.
| | - Gerit Pototschnig
- Institute of Applied Synthetic Chemistry
, TU Wien
,
Getreidemarkt 9/163
, A-1060 Vienna
, Austria
.
| | - Patricia Schaaf
- Institute of Applied Synthetic Chemistry
, TU Wien
,
Getreidemarkt 9/163
, A-1060 Vienna
, Austria
.
| | - Thomas Wiesinger
- Institute of Applied Synthetic Chemistry
, TU Wien
,
Getreidemarkt 9/163
, A-1060 Vienna
, Austria
.
| | - Muhammad Farooq Zia
- Institute of Applied Synthetic Chemistry
, TU Wien
,
Getreidemarkt 9/163
, A-1060 Vienna
, Austria
.
| | - Joanna Wencel-Delord
- Laboratoire de Chimie Moléculaire (UMR CNRS 7509)
, Université de Strasbourg
,
ECPM 25 Rue Becquerel
, 67087 Strasbourg
, France
| | - Tatiana Besset
- Normandie Univ
, INSA Rouen
, UNIROUEN
, CNRS
, COBRA (UMR 6014)
,
76000 Rouen
, France
| | - Bert U. W. Maes
- Organic Synthesis (ORSY)
, Department of Chemistry
, University of Antwerp
,
Groenenborgerlaan 171
, 2020 Antwerp
, Belgium
| | - Michael Schnürch
- Institute of Applied Synthetic Chemistry
, TU Wien
,
Getreidemarkt 9/163
, A-1060 Vienna
, Austria
.
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14
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Bakthadoss M, Agarwal V. Synthesis of Highly Functionalized Tricyclic Chromenopyrazole FrameworksviaIntramolecular Azomethine Imine 1,3-Dipolar Cycloaddition (IAIDC). ChemistrySelect 2018. [DOI: 10.1002/slct.201801269] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Manickam Bakthadoss
- Department of Chemistry; Pondicherry University, R. V. Nagar, Kalapet; Puducherry 605014 India
| | - Vishal Agarwal
- Department of Chemistry; Pondicherry University, R. V. Nagar, Kalapet; Puducherry 605014 India
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15
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Bakthadoss M, Kumar PV. Ruthenium‐Catalyzed Site‐selective Enone Carbonyl Directed
ortho
‐C−H Activation of Aromatics and Heteroaromatics with Alkenes. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800376] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
| | - Polu Vijay Kumar
- Department of ChemistryPondicherry University Pondicherry - 605014 India
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