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Ojo OS, Sale H, Symes MD, Wilson C. Synthesis of a chiral dinuclear Cu(II)-benzothiazolamine complex: evidence of cuprophilic interaction in its structure and exploration of its electrochemical properties and catalytic performance. Dalton Trans 2023. [PMID: 37902024 DOI: 10.1039/d3dt02994h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2023]
Abstract
The synthesis of a chiral dinuclear [Cu(OAc)2(L1)]2 complex (A) and its analogues Cu(OAc)2(L1)2 (B), Cu(OAc)2(L1)PPh3 (C), CuBr(L1)PPh3 (D), and Cu(OAc)2(L2) (E) is described. The X-ray structure of A reveals a cuprophilic interaction (2.65 Å) and shows that L1 behaves as a monodentate ligand. The stereogenic centre in L1 aligns the NH group to form non-covalent interactions with the paddle-wheel acetate groups at variable distances (2.4-2.5 Å and 2.2-2.7 Å). Thermogravimetric analysis confirmed our hypothesis that two equivalents of L1 (B) or a combination of L1 and PPh3 (C) would disrupt the cuprophilic interaction. All complexes, except D, showed irreversible redox waves by cyclic voltammetry. Complexes C and E have lower oxidative peaks (at 10 V s-1) than complex A between +0.40 and +0.60 V. This highlights the influence of ligand(s) on the redox behaviour of Cu(II) complexes. The significance of this electrochemical behaviour was evident in the Chan-Lam (CL) coupling reaction, where 2.5 mol% of A successfully facilitated the formation of a C-N bond. This study showcased the structure, thermal stability, electrochemical properties and catalytic performance of a chiral dinuclear copper(II)-benzothiazolamine complex.
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Affiliation(s)
- O Stephen Ojo
- WestCHEM, School of Chemistry, The Joseph Black Building, University of Glasgow, Glasgow, G12 8QQ, UK.
| | - Halilu Sale
- WestCHEM, School of Chemistry, The Joseph Black Building, University of Glasgow, Glasgow, G12 8QQ, UK.
| | - Mark D Symes
- WestCHEM, School of Chemistry, The Joseph Black Building, University of Glasgow, Glasgow, G12 8QQ, UK.
| | - Claire Wilson
- WestCHEM, School of Chemistry, The Joseph Black Building, University of Glasgow, Glasgow, G12 8QQ, UK.
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2
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Ganesh K, Sambasivam G, Gavara G, S R, Rajendra G, Karthikeyan S. An efficient metal free synthesis of 2-aminobenzothiozoles - a greener approach. Org Biomol Chem 2023; 21:564-568. [PMID: 36538019 DOI: 10.1039/d2ob01981g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A facile one-pot, metal-free method for the synthesis of 2-aminobenzothiazoles was developed, which includes an initial reaction of electron-deficient 2-haloanilines with aromatic isothiocyanates and the subsequent intramolecular cyclization of the resulting thioureas through the SNAr mechanism. This one-pot, atom-economical, robust, and scalable method avoids the use of reagents such as acid chlorides and Lawesson's reagent that are difficult to handle.
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Affiliation(s)
- Krithika Ganesh
- Anthem Biosciences Pvt. Ltd, Bangalore 560099, India
- Vellore Institute of Technology, Vellore 632014, India
| | | | | | - Ramraj S
- Anthem Biosciences Pvt. Ltd, Bangalore 560099, India
| | | | - S Karthikeyan
- Vellore Institute of Technology, Vellore 632014, India
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3
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Abdelbasset WK, Sultan MQ, Alkaim AF, Abdullaevich Ashurov T, Altimari US, Hussein BA, Mustafa YF, Hammid AT. Intramolecular Cascade C–S Bond Formation: A Safe and New Strategy for the Synthesis of Riluzole Analogues Catalyzed by K 2S 2O 8. Polycycl Aromat Compd 2022. [DOI: 10.1080/10406638.2022.2143826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- Walid Kamal Abdelbasset
- Department of Health and Rehabilitation Sciences, College of Applied Medical Sciences, Prince Sattam Bin Abdulaziz University, Al Kharj, Saudi Arabia
- Department of Physical Therapy, Kasr Al-Aini Hospital, Cairo University, Giza, Egypt
| | | | - Ayad F. Alkaim
- Chemistry Department, College of Science for Women, Iraq
| | | | | | | | - Yasser Fakri Mustafa
- Department of Pharmaceutical Chemistry, College of Pharmacy, University of Mosul, Mosul, Iraq
| | - Ali Thaeer Hammid
- Computer Engineering Department, Imam Ja’afar Al-Sadiq University, Baghdad, Iraq
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Copper Dithiocarbamates: Coordination Chemistry and Applications in Materials Science, Biosciences and Beyond. INORGANICS 2021. [DOI: 10.3390/inorganics9090070] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Copper dithiocarbamate complexes have been known for ca. 120 years and find relevance in biology and medicine, especially as anticancer agents and applications in materials science as a single-source precursor (SSPs) to nanoscale copper sulfides. Dithiocarbamates support Cu(I), Cu(II) and Cu(III) and show a rich and diverse coordination chemistry. Homoleptic [Cu(S2CNR2)2] are most common, being known for hundreds of substituents. All contain a Cu(II) centre, being either monomeric (distorted square planar) or dimeric (distorted trigonal bipyramidal) in the solid state, the latter being held together by intermolecular C···S interactions. Their d9 electronic configuration renders them paramagnetic and thus readily detected by electron paramagnetic resonance (EPR) spectroscopy. Reaction with a range of oxidants affords d8 Cu(III) complexes, [Cu(S2CNR2)2][X], in which copper remains in a square-planar geometry, but Cu–S bonds shorten by ca. 0.1 Å. These show a wide range of different structural motifs in the solid-state, varying with changes in anion and dithiocarbamate substituents. Cu(I) complexes, [Cu(S2CNR2)2]−, are (briefly) accessible in an electrochemical cell, and the only stable example is recently reported [Cu(S2CNH2)2][NH4]·H2O. Others readily lose a dithiocarbamate and the d10 centres can either be trapped with other coordinating ligands, especially phosphines, or form clusters with tetrahedral [Cu(μ3-S2CNR2)]4 being most common. Over the past decade, a wide range of Cu(I) dithiocarbamate clusters have been prepared and structurally characterised with nuclearities of 3–28, especially exciting being those with interstitial hydride and/or acetylide co-ligands. A range of mixed-valence Cu(I)–Cu(II) and Cu(II)–Cu(III) complexes are known, many of which show novel physical properties, and one Cu(I)–Cu(II)–Cu(III) species has been reported. Copper dithiocarbamates have been widely used as SSPs to nanoscale copper sulfides, allowing control over the phase, particle size and morphology of nanomaterials, and thus giving access to materials with tuneable physical properties. The identification of copper in a range of neurological diseases and the use of disulfiram as a drug for over 50 years makes understanding of the biological formation and action of [Cu(S2CNEt2)2] especially important. Furthermore, the finding that it and related Cu(II) dithiocarbamates are active anticancer agents has pushed them to the fore in studies of metal-based biomedicines.
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Bhattacharya A, Thirupathi A, Natarajan P, Peruncheralathan S. Chemoselective Ullmann Reaction of α-Trisubstituted Thioamides: Synthesis of Novel 2-Iminobenzothiolanes. ACS OMEGA 2021; 6:21169-21180. [PMID: 34423225 PMCID: PMC8375098 DOI: 10.1021/acsomega.1c03410] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Accepted: 07/27/2021] [Indexed: 06/13/2023]
Abstract
New classes of unexplored benzo[b]thiolanes are synthesized from trisubstituted thioamides through copper-catalyzed intramolecular S-arylation of thioamides for the first time. This method provides good to excellent yields with fully controlled chemoselectivity. Unusually, iminobenzo[b]thiolanes are very stable under mild acidic conditions. A plausible mechanism is proposed for the chemoselective S-arylation process.
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Parmar U, Somvanshi D, Kori S, Desai AA, Dandela R, Maity DK, Kapdi AR. Room-Temperature Amination of Chloroheteroarenes in Water by a Recyclable Copper(II)-Phosphaadamantanium Sulfonate System. J Org Chem 2021; 86:8900-8925. [PMID: 34156851 DOI: 10.1021/acs.joc.1c00845] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Buchwald-Hartwig amination of chloroheteroarenes has been a challenging synthetic process, with very few protocols promoting this important transformation at ambient temperature. The current report discusses about an efficient copper-based catalytic system (Cu/PTABS) for the amination of chloroheteroarenes at ambient temperature in water as the sole reaction solvent, a combination that is first to be reported. A wide variety of chloroheteroarenes could be coupled efficiently with primary and secondary amines as well as selected amino acid esters under mild reaction conditions. Catalytic efficiency of the developed protocol also promotes late-stage functionalization of active pharmaceutical ingredients (APIs) such as antibiotics (floxacins) and anticancer drugs. The catalytic system also performs efficiently at a very low concentration of 0.0001 mol % (TON = 980,000) and can be recycled 12 times without any appreciable loss in activity. Theoretical calculations reveal that the π-acceptor ability of the ligand PTABS is the main reason for the appreciably high reactivity of the catalytic system. Preliminary characterization of the catalytic species in the reaction was carried out using UV-VIS and ESR spectroscopy, providing evidence for the Cu(II) oxidation state.
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Affiliation(s)
- Udaysinh Parmar
- Aether Industries Limited, B-21/7, Hojiwala Industrial Estate, Sachin, Surat 394230, Gujarat, India
| | - Dipesh Somvanshi
- Department of Chemistry, Institute of Chemical Technology, Nathalal Parekh road, Matunga, Mumbai 400019, India
| | - Santosh Kori
- Department of Chemistry, Institute of Chemical Technology, Nathalal Parekh road, Matunga, Mumbai 400019, India
- Department of Industrial and Engineering Chemistry, Institute of Chemical Technology-Indian Oil Odisha Campus, IIT Khragpur extension Centre, Mouza Samantpuri, Bhubaneswar 751013, Odisha, India
| | - Aman A Desai
- Aether Industries Limited, B-21/7, Hojiwala Industrial Estate, Sachin, Surat 394230, Gujarat, India
| | - Rambabu Dandela
- Department of Industrial and Engineering Chemistry, Institute of Chemical Technology-Indian Oil Odisha Campus, IIT Khragpur extension Centre, Mouza Samantpuri, Bhubaneswar 751013, Odisha, India
| | - Dilip K Maity
- Chemical Sciences, Homi Bhabha National Institute, Anushaktinagar, Mumbai 400094, India
- Chemical Sciences, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
| | - Anant R Kapdi
- Department of Chemistry, Institute of Chemical Technology, Nathalal Parekh road, Matunga, Mumbai 400019, India
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Zhu H, Zhang SB, Liu X, Cheng Y, Peng HY, Dong ZB. Copper(II)-Promoted Cascade Synthesis of 2-Aminobenzothiazoles Starting from 2-Iodoanilines and Sodium Dithiocarbamates. European J Org Chem 2018. [DOI: 10.1002/ejoc.201801122] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Hui Zhu
- School of Chemistry and Environmental Engineering; Wuhan Institute of Technology; 430205 Wuhan China
| | - Shi-Bo Zhang
- School of Chemistry and Environmental Engineering; Wuhan Institute of Technology; 430205 Wuhan China
| | - Xing Liu
- School of Chemistry and Environmental Engineering; Wuhan Institute of Technology; 430205 Wuhan China
| | - Yu Cheng
- School of Chemistry and Environmental Engineering; Wuhan Institute of Technology; 430205 Wuhan China
| | - Han-Ying Peng
- School of Chemistry and Environmental Engineering; Wuhan Institute of Technology; 430205 Wuhan China
| | - Zhi-Bing Dong
- School of Chemistry and Environmental Engineering; Wuhan Institute of Technology; 430205 Wuhan China
- Department of Chemistry; Ludwig-Maximilians-Universität; Butenandtstrasse 5-13 81377 München Germany
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Liu C, Zhang B. Facile Access to Fluoroaromatic Molecules by Transition-Metal-Free C-F Bond Cleavage of Polyfluoroarenes: An Efficient, Green, and Sustainable Protocol. CHEM REC 2016; 16:667-87. [DOI: 10.1002/tcr.201500248] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Indexed: 01/23/2023]
Affiliation(s)
- Cuibo Liu
- Department of Chemistry; School of Science, Tianjin University; Tianjin 300072 P. R. China
| | - Bin Zhang
- Department of Chemistry; School of Science, Tianjin University; Tianjin 300072 P. R. China
- Collaborative Innovation; Center of Chemical Science and Engineering; Tianjin 300072 P. R. China
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Yin X, Guo Y, Liu C, Wang Z, Zhang B. One-pot two-step facile synthesis of 2,3,5,6-tetrafluorobenzonitrile-containing dithiocarbamic acid esters. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.07.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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10
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Zanwar MR, Gawande SD, Kavala V, Kuo CW, Yao CF. Iron(III) Chloride Catalyzed Synthesis of Highly Substituted Indolyl-Tetrahydroquinoline Derivatives by Using Indolylnitroalkene as Dienophiles and Its Application to the Synthesis of Indolo-Benzonaphthyridine Derivatives. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201400424] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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11
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Zhao H, He W, Yao R, Cai M. Heterogeneous Copper-Catalyzed Cascade Three-Component Reaction of Amines, Carbon Disulfide and 2-Iodoanilines Leading to 2-Aminobenzothiazoles. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201400381] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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12
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Zhao N, Liu L, Wang F, Li J, Zhang W. Copper/N,N,N′,N′-Tetramethylethylenediamine-Catalyzed Synthesis ofN-Substituted BenzoheterocyclesviaCS Cross- Coupling at Ambient Temperature in Water. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201400043] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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13
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Toulot S, Heinrich T, Leroux FR. Convenient and Reliable Routes Towards 2-Aminothiazoles: Palladium-CatalyzedversusCopper-Catalyzed Aminations of Halothiazoles. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201300591] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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14
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Zhu TH, Wang SY, Wang GN, Ji SJ. Cobalt-Catalyzed Oxidative Isocyanide Insertion to Amine-Based Bisnucleophiles: Diverse Synthesis of Substituted 2-Aminobenzimidazoles, 2-Aminobenzothiazoles, and 2-Aminobenzoxazoles. Chemistry 2013; 19:5850-3. [DOI: 10.1002/chem.201300239] [Citation(s) in RCA: 70] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2013] [Revised: 02/25/2013] [Indexed: 01/14/2023]
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Ramana T, Punniyamurthy T. Preparation of 2-Azido-1-Substituted-1 H-Benzo[d]imidazoles Using a Copper-Promoted Three-Component Reaction and Their Further Conversion into 2-Amino and 2-Triazolyl Derivatives. Chemistry 2012; 18:13279-83. [DOI: 10.1002/chem.201202215] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2012] [Revised: 08/11/2012] [Indexed: 11/10/2022]
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16
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Yang X, Zhang Y, Ma D. Synthesis of Aryl Carbamates
via
Copper‐Catalyzed Coupling of Aryl Halides with Potassium Cyanate. Adv Synth Catal 2012. [DOI: 10.1002/adsc.201200296] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Xinye Yang
- Center of Drug Discovery, China Pharmaceutical University, Nanjing 210009, People's Republic of China
| | - Yihua Zhang
- Center of Drug Discovery, China Pharmaceutical University, Nanjing 210009, People's Republic of China
| | - Dawei Ma
- State Key Laboratory of Bioorganic & Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai 200032, People's Republic of China, Fax: (+86)‐21‐6416‐6128
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Zhang W, Yue Y, Yu D, Song L, Xu YY, Tian YJ, Guo YJ. 1,10-Phenanthroline-Catalyzed Tandem Reaction of 2-Iodoanilines with Isothiocyanates in Water. Adv Synth Catal 2012. [DOI: 10.1002/adsc.201200175] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Alagiri K, Prabhu KR. Catalyst-Free Regio- and Stereospecific Synthesis of β-Sulfonamido Dithiocarbamates: Efficient Ring-Opening Reactions of N-Tosyl Aziridines by Dialkyldithiocarbamates. Chemistry 2011; 17:6922-5. [DOI: 10.1002/chem.201100817] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2011] [Indexed: 11/09/2022]
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