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Bortolami M, Chiarotto I, Mattiello L, Petrucci R, Rocco D, Vetica F, Feroci M. Organic electrochemistry: Synthesis and functionalization of β-lactams in the twenty-first century. HETEROCYCL COMMUN 2021. [DOI: 10.1515/hc-2020-0121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
Organic electrochemistry is a technique that allows for the heterogeneous redox reactions avoiding both the use of stoichiometric amounts of redox reagents and the resulting formation of stoichiometric by-products. In fact, the redox reagent in these reactions is the electron, which is naturally eco-friendly and produces no side compounds. It is therefore quite obvious that electrochemistry can be classified as a “green” technology. The use of this methodology in the synthesis of β-lactams is not a novelty, but the growing interest in this class of biologically active compounds, due to the discovery of new fields of application (after a moment of decrease in interest due to antibiotic resistance) has been a stimulus for the search for more efficient electrochemical ways to synthesize and transform β-lactams. Thus, this review deals with the twenty-first-century applications of electroorganic technique to the chemistry of β-lactams, by analyzing first the syntheses classified by the type of reactions (cyclization, cycloaddition, etc.) and then by manipulating the β-lactam structure, using it as a synthon. Lastly, the importance of this technique is demonstrated by a study of a pilot plant scale reduction of a cephalosporanic acid derivative to a commercially important antibiotic.
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Affiliation(s)
- Martina Bortolami
- Department of Basic and Applied Sciences for Engineering (SBAI), Sapienza University , via del Castro Laurenziano, 7, I-00161 , Rome , Italy
| | - Isabella Chiarotto
- Department of Basic and Applied Sciences for Engineering (SBAI), Sapienza University , via del Castro Laurenziano, 7, I-00161 , Rome , Italy
| | - Leonardo Mattiello
- Department of Basic and Applied Sciences for Engineering (SBAI), Sapienza University , via del Castro Laurenziano, 7, I-00161 , Rome , Italy
| | - Rita Petrucci
- Department of Basic and Applied Sciences for Engineering (SBAI), Sapienza University , via del Castro Laurenziano, 7, I-00161 , Rome , Italy
| | - Daniele Rocco
- Department of Basic and Applied Sciences for Engineering (SBAI), Sapienza University , via del Castro Laurenziano, 7, I-00161 , Rome , Italy
| | - Fabrizio Vetica
- Department of Chemistry, Sapienza University , p.le Aldo Moro, 5, I-00185 , Rome , Italy
| | - Marta Feroci
- Department of Basic and Applied Sciences for Engineering (SBAI), Sapienza University , via del Castro Laurenziano, 7, I-00161 , Rome , Italy
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Fantinati A, Zanirato V, Marchetti P, Trapella C. The Fascinating Chemistry of α-Haloamides. ChemistryOpen 2020; 9:100-170. [PMID: 32025460 PMCID: PMC6996577 DOI: 10.1002/open.201900220] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Revised: 11/19/2019] [Indexed: 12/17/2022] Open
Abstract
The aim of this review is to highlight the rich chemistry of α-haloamides originally mainly used to discover new C-N, C-O and C-S bond forming reactions, and later widely employed in C-C cross-coupling reactions with C(sp3), C(sp2) and C(sp) coupling partners. Radical-mediated transformations of α-haloamides bearing a suitable located unsaturated bond has proven to be a straightforward alternative to access diverse cyclic compounds by means of either radical initiators, transition metal redox catalysis or visible light photoredox catalysis. On the other hand, cycloadditions with α-halohydroxamate-based azaoxyallyl cations have garnered significant attention. Moreover, in view of the important role in life and materials science of difluoroalkylated compounds, a wide range of catalysts has been developed for the efficient incorporation of difluoroacetamido moieties into activated as well as unactivated substrates.
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Affiliation(s)
- Anna Fantinati
- Department of Chemical and Pharmaceutical SciencesUniversity of Ferrara, Via Fossato di Mortara 1744121FerraraItaly E-mail: V. Zanirato
| | - Vinicio Zanirato
- Department of Chemical and Pharmaceutical SciencesUniversity of Ferrara, Via Fossato di Mortara 1744121FerraraItaly E-mail: V. Zanirato
| | - Paolo Marchetti
- Department of Chemical and Pharmaceutical SciencesUniversity of Ferrara, Via Fossato di Mortara 1744121FerraraItaly E-mail: V. Zanirato
| | - Claudio Trapella
- Department of Chemical and Pharmaceutical SciencesUniversity of Ferrara, Via Fossato di Mortara 1744121FerraraItaly E-mail: V. Zanirato
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Chiarotto I, Mattiello L, Feroci M. The Electrogenerated Cyanomethyl Anion: An Old Base Still Smart. Acc Chem Res 2019; 52:3297-3308. [PMID: 31714056 DOI: 10.1021/acs.accounts.9b00465] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The cathodic reduction of acetonitrile solutions containing a tetraalkylammonium salt leads to the formation of the cyanomethyl anion (-CH2CN, cyanomethanide). This electrolysis can be carried out under very simple experimental conditions (constant-current electrolyses), using various cathodic materials, controlling the amount of base by simply controlling the amount of charge. Despite the fact that the mechanism for this electrochemical reaction is still debated (and it depends on the cathodic material), the outcome of the electrolysis is the formation of a strong base, -CH2CN (pKa 31.3 for acetonitrile in DMSO). The chemical behavior of this electrogenerated base (EGB) strongly depends on its counterion, which in this case is a tetraalkylammonium cation, with a low charge density and thus not coordinated. The very weak interaction between R4N+ and -CH2CN renders the cyanomethyl anion a "naked" ion, and thus highly reactive. In particular, the cyanomethyl anion can react as a base and as a nucleophile. In the first case, it behaves as a strong base and, after deprotonation of a weak acidic substrate, transforms itself into a solvent molecule, acetonitrile, thus generating no byproducts. In the second case, the reactivity as a nucleophile of the cyanomethyl anion obviously depends on the reaction partner. When an electrophile is present in the reaction mixture, a cyanomethylation is obtained (e.g., with aromatic aldehydes, possessing no acidic hydrogen atoms, which undergo nucleophilic attack on the carbonyl carbon atom by -CH2CN); on the contrary, when no reagent is present other than acetonitrile and tetraalkylammonium salt, an attack on the parent molecule leads to the acetonitrile dimer, 3-aminocrotononitrile, which in turn can behave as a base and/or as a nucleophile. In this regard, some authors report that it is preferable to carry out the electrogeneration of the cyanomethyl anion under different experimental conditions, i.e., using an undivided cell and a sacrificial magnesium anode. In this way, a Grignard-type reagent is formed (Mg(CH2CN)2) which highly stabilizes the cyanomethyl anion, preventing its dimerization. It should be noted that in our laboratory the electrogenerated tetraalkylammonium cyanomethanide was extensively used in various reactions (both acid-base and nucleophile-electrophile, vide infra), and in almost no case, the amount of acetonitrile dimer formed exceeded 5%, confirming the validity of this electrochemical methodology to generate a very efficient base. Moreover, when in the reaction mixture both a weak acid and an electrophile are present, the prevalent reactivity of the cyanomethyl anion is as a base, leaving the possibility of a cyanomethylation reaction to those cases in which no acidic substrate is present. We have successfully used the electrogenerated cyanomethyl anion in many base-induced reactions, as the synthesis of the β-lactam ring (chiral or not), the insertion of carbon dioxide into amines and amino alcohols, the activation of elemental sulfur and insertion into carbonyl compounds, the selective alkylation of difunctional compounds, etc.
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Affiliation(s)
- Isabella Chiarotto
- Dipartimento di Scienze di Base e Applicate per l’Ingegneria (SBAI), Sapienza University of Rome, via del Castro Laurenziano, 7, 00161, Roma, Italy
| | - Leonardo Mattiello
- Dipartimento di Scienze di Base e Applicate per l’Ingegneria (SBAI), Sapienza University of Rome, via del Castro Laurenziano, 7, 00161, Roma, Italy
| | - Marta Feroci
- Dipartimento di Scienze di Base e Applicate per l’Ingegneria (SBAI), Sapienza University of Rome, via del Castro Laurenziano, 7, 00161, Roma, Italy
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Shatskiy A, Lundberg H, Kärkäs MD. Organic Electrosynthesis: Applications in Complex Molecule Synthesis. ChemElectroChem 2019. [DOI: 10.1002/celc.201900435] [Citation(s) in RCA: 86] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Andrey Shatskiy
- Department of ChemistryKTH Royal Institute of Technology SE-100 44 Stockholm Sweden
| | - Helena Lundberg
- Department of ChemistryKTH Royal Institute of Technology SE-100 44 Stockholm Sweden
| | - Markus D. Kärkäs
- Department of ChemistryKTH Royal Institute of Technology SE-100 44 Stockholm Sweden
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Couto Petro AG, Mubarak MS, Peters DG. Electrochemical reduction of 2-halo-N-phenylacetamides at glassy carbon cathodes in dimethylformamide. J Electroanal Chem (Lausanne) 2019. [DOI: 10.1016/j.jelechem.2019.03.079] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Seavill PW, Holt KB, Wilden JD. Electrochemical synthesis of copper(i) acetylides via simultaneous copper ion and catalytic base electrogeneration for use in click chemistry. RSC Adv 2019; 9:29300-29304. [PMID: 35528428 PMCID: PMC9071997 DOI: 10.1039/c9ra06782e] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Accepted: 09/11/2019] [Indexed: 11/21/2022] Open
Abstract
We report an efficient and sustainable electrochemical synthesis of copper(i) acetylides using simultaneous copper oxidation and Hofmann elimination of quaternary ammonium salts.
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Pasciak EM, Sengupta A, Mubarak MS, Raghavachari K, Peters DG. Electrochemical reduction of 2-chloro-N-phenylacetamides at carbon and silver cathodes in dimethylformamide. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2014.01.133] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Li CH, Yuan GQ, Zheng JH, He ZJ, Qi CR, Jiang HF. Effective synthesis of symmetrical oxygen- and nitrogen-heterocycles from electron-deficient alkynes via the catalysis of electrogenerated base and Fe3+ ions. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.04.058] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Affiliation(s)
- Bimal K. Banik
- Dept. Chemistry, University of Texas-Pan American, W. University Drive 1201, Edinburg, 78539 USA
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Bianchi G, Chiarini M, Marinelli F, Rossi L, Arcadi A. Product Selectivity Control in the Heteroannulation ofo-(1-Alkynyl)benzamides. Adv Synth Catal 2010. [DOI: 10.1002/adsc.200900668] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Bianchi G, Feroci M, Rossi L. Reaction of the Electrogenerated Cyanomethyl Anion with Carbonyl Compounds: A Clean and Safe Synthesis of β-Hydroxynitriles. European J Org Chem 2009. [DOI: 10.1002/ejoc.200900527] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Feroci M, Chiarotto I, Rossi L, Inesi A. Activation of Elemental Sulfur by Electrogenerated Cyanomethyl Anion: Synthesis of Substituted 2-Aminothiophenes by the Gewald Reaction. Adv Synth Catal 2008. [DOI: 10.1002/adsc.200800503] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Feroci M, Chiarotto I, Orsini M, Sotgiu G, Inesi A. Reactivity of Electrogenerated N-Heterocyclic Carbenes in Room-Temperature Ionic Liquids. Cyclization to 2-Azetidinone RingviaC-3/C-4 Bond Formation. Adv Synth Catal 2008. [DOI: 10.1002/adsc.200800049] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Arcadi A, Bianchi G, Inesi A, Marinelli F, Rossi L. Electrochemical-Mediated Cyclization of 2-Alkynylanilines: A Clean and Safe Synthesis of Indole Derivatives. European J Org Chem 2008. [DOI: 10.1002/ejoc.200701011] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Feroci M, Orsini M, Sotgiu G, Inesi A. The Knoevenagel reaction in electrochemically activated solvents. Electrochim Acta 2008. [DOI: 10.1016/j.electacta.2007.09.048] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Feroci M. Synthesis of β-Lactams by 4-exo-tet Cyclization Process Induced by Electrogenerated Cyanomethyl Anion, Part 2:[1] Stereochemical Implications. Adv Synth Catal 2007. [DOI: 10.1002/adsc.200700156] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Arcadi A, Inesi A, Marinelli F, Rossi L, Verdecchia M. An Electrochemical Alternative Approach to the Cyclization of Alkynes Bearing Proximate Malonyl Moieties. European J Org Chem 2007. [DOI: 10.1002/ejoc.200601066] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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