1
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Mal S, Sarkar S, Jana M. Metal-free C(sp3)-H Bromination: Synthesis of Phenacyl bromide and Benzyl bromide derivatives. J CHEM SCI 2022. [DOI: 10.1007/s12039-022-02107-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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2
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Bastos GA, de Mattos MC. A convenient Hofmann reaction of carboxamides and cyclic imides mediated by trihaloisocyanuric acids. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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3
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Sancheti SV, Yadav GD. Continuous Synthesis and Separation of p-Bromobenzyl Bromide Using Atom-Efficient Bromination of p-Bromotoluene without Any Organic Effluent: Potential for Green Industrial Practice. Org Process Res Dev 2021. [DOI: 10.1021/acs.oprd.1c00135] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sonam V. Sancheti
- Department of Chemical Engineering, Institute of Chemical Technology, Nathalal Parekh Marg, Matunga, Mumbai 400 019, Maharashtra, India
| | - Ganapati D. Yadav
- Department of Chemical Engineering, Institute of Chemical Technology, Nathalal Parekh Marg, Matunga, Mumbai 400 019, Maharashtra, India
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4
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Yong T, Báti G, García F, Stuparu MC. Mechanochemical transformation of planar polyarenes to curved fused-ring systems. Nat Commun 2021; 12:5187. [PMID: 34465777 PMCID: PMC8408202 DOI: 10.1038/s41467-021-25495-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Accepted: 08/04/2021] [Indexed: 11/29/2022] Open
Abstract
The transformation of planar aromatic molecules into π-extended non-planar structures is a challenging task and has not been realized by mechanochemistry before. Here we report that mechanochemical forces can successfully transform a planar polyarene into a curved geometry by creating new C-C bonds along the rim of the molecular structure. In doing so, mechanochemistry does not require inert conditions or organic solvents and provide better yields within shorter reaction times. This is illustrated in a 20-minute synthesis of corannulene, a fragment of fullerene C60, in 66% yield through ball milling of planar tetrabromomethylfluoranthene precursor under ambient conditions. Traditional solution and gas-phase synthetic pathways do not compete with the practicality and efficiency offered by the mechanochemical synthesis, which now opens up a new reaction space for inducing curvature at a molecular level.
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Affiliation(s)
- Teoh Yong
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, Singapore
| | - Gábor Báti
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, Singapore
| | - Felipe García
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, Singapore.
| | - Mihaiela C Stuparu
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, Singapore.
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5
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Tibbetts J, Russo D, Lapkin AA, Bull SD. Efficient Syntheses of Biobased Terephthalic Acid, p-Toluic Acid, and p-Methylacetophenone via One-Pot Catalytic Aerobic Oxidation of Monoterpene Derived Bio- p-cymene. ACS SUSTAINABLE CHEMISTRY & ENGINEERING 2021; 9:8642-8652. [PMID: 35024250 PMCID: PMC8735764 DOI: 10.1021/acssuschemeng.1c02605] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 06/07/2021] [Indexed: 06/14/2023]
Abstract
An efficient elevated-pressure catalytic oxidative process (2.5 mol % Co(NO3)2, 2.5 mol % MnBr2, air (30 bar), 125 °C, acetic acid, 6 h) has been developed to oxidize p-cymene into crystalline white terephthalic acid (TA) in ∼70% yield. Use of this mixed Co2+/Mn2+ catalytic system is key to obtaining high 70% yields of TA at relatively low reaction temperatures (125 °C) in short reaction times (6 h), which is likely to be due to the synergistic action of bromine and nitrate radicals in the oxidative process. Recycling studies have demonstrated that the mixed metal catalysts present in recovered mother liquors could be recycled three times in successive p-cymene oxidation reactions with no loss in catalytic activity or TA yield. Partial oxidation of p-cymene to give p-methylacetophenone (p-MA) in 55-60% yield can be achieved using a mixed CoBr2/Mn(OAc)2 catalytic system under 1 atm air for 24 h, while use of Co(NO3)2/MnBr2 under 1 atm O2 for 24 h gave p-toluic acid in 55-60% yield. Therefore, access to these simple catalytic aerobic conditions enables multiple biorenewable bulk terpene feedstocks (e.g., crude sulfate turpentine, turpentine, cineole, and limonene) to be converted into synthetically useful bio-p-MA, bio-p-toluic acid, and bio-TA (and hence bio-polyethylene terephthalate) as part of a terpene based biorefinery.
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Affiliation(s)
- Joshua
D. Tibbetts
- Department
of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, U.K.
- Centre
for Sustainable Chemical Technologies, University
of Bath, Claverton Down, Bath, BA2 7AY, U.K.
| | - Danilo Russo
- Department
of Chemical Engineering and Biotechnology, University of Cambridge, West Cambridge Site, Philippa Fawcett Drive, Cambridge, CB3 0AS, United
Kingdom
| | - Alexei A. Lapkin
- Department
of Chemical Engineering and Biotechnology, University of Cambridge, West Cambridge Site, Philippa Fawcett Drive, Cambridge, CB3 0AS, United
Kingdom
| | - Steven D. Bull
- Department
of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, U.K.
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6
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Jordan A, Stoy P, Sneddon HF. Chlorinated Solvents: Their Advantages, Disadvantages, and Alternatives in Organic and Medicinal Chemistry. Chem Rev 2020; 121:1582-1622. [DOI: 10.1021/acs.chemrev.0c00709] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Andrew Jordan
- GlaxoSmithKline Carbon Neutral Laboratory for Sustainable Chemistry, Jubilee Campus, University of Nottingham, 6 Triumph Road, Nottingham NG7 2GA, U.K
| | - Patrick Stoy
- Drug Design and Selection, Platform and Technology Sciences, GlaxoSmithKline, 1250 South Collegeville Road, Collegeville, Pennsylvania 19426, United States
| | - Helen F. Sneddon
- GSK, Medicines Research Centre, Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, U.K
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7
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Day DP, Alsenani NI. Dibromoisocyanuric Acid: Applications in Brominations and Oxidation Processes for the Synthesis of High Value Compounds. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000249] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- David P. Day
- São Carlos Institute of ChemistryUniversity of São Paulo 13560-970, São Carlos SP Brazil
| | - Nawaf I. Alsenani
- Department of ChemistryAl-Baha University Al Bahah 1988 Al-Baha Saudi Arabia
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8
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Crespo LT, Senra MR, Esteves PM, de Mattos MC. Tribromoisocyanuric Acid as a Green Cohalogenating Reagent: An Efficient Transformation of Alkynes into α,α-Dibromoketones and Vicinal Dibromoalkenes. LETT ORG CHEM 2019. [DOI: 10.2174/1570178615666180803152951] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The co-halogenation reaction of alkynes with tri-bromoisocyanuric acid in acetic acid, followed by aqueous work-up produced α,α-di-bromoketones (44-84%), while the reaction in aqueous acetonitrile in the presence of KBr produced vicinal di-bromoalkenes (66-86%). The usefulness of the methodology was demonstrated employing green metrics for the comparison of TBCA with analogous N-halo reagents in co-halogenation reactions of alkynes.
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Affiliation(s)
- Lívia T.C. Crespo
- Departamento de Quimica Organica, Instituto de Quimica, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Mônica R. Senra
- Departamento de Quimica Organica, Instituto de Quimica, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Pierre M. Esteves
- Departamento de Quimica Organica, Instituto de Quimica, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Marcio C.S. de Mattos
- Departamento de Quimica Organica, Instituto de Quimica, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
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9
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Schnell A, Willms JA, Nozinovic S, Engeser M. Mechanistic studies of an L-proline-catalyzed pyridazine formation involving a Diels-Alder reaction with inverse electron demand. Beilstein J Org Chem 2019; 15:30-43. [PMID: 30680036 PMCID: PMC6334817 DOI: 10.3762/bjoc.15.3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2018] [Accepted: 11/28/2018] [Indexed: 12/28/2022] Open
Abstract
The mechanism of an L-proline-catalyzed pyridazine formation from acetone and aryl-substituted tetrazines via a Diels-Alder reaction with inverse electron demand has been studied with NMR and with electrospray ionization mass spectrometry. A catalytic cycle with three intermediates has been proposed. An enamine derived from L-proline and acetone acts as an electron-rich dienophile in a [4 + 2] cycloaddition with the electron-poor tetrazine forming a tetraazabicyclo[2.2.2]octadiene derivative which then eliminates N2 in a retro-Diels-Alder reaction to yield a 4,5-dihydropyridazine species. The reaction was studied in three variants: unmodified, with a charge-tagged substrate, and with a charge-tagged proline catalyst. The charge-tagging technique strongly increases the ESI response of the respective species and therefore enables to capture otherwise undetected reaction components. With the first two reaction variants, only small intensities of intermediates were found, but the temporal progress of reactants and products could be monitored very well. In experiments with the charge-tagged L-proline-derived catalyst, all three intermediates of the proposed catalytic cycle were detected and characterized by collision-induced dissociation (CID) experiments. Some of the CID pathways of intermediates mimic single steps of the proposed catalytic cycle in the gas phase. Thus, the charge-tagged catalyst proved one more time its superior effectiveness for the detection and study of reactive intermediates at low concentrations.
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Affiliation(s)
- Anne Schnell
- University of Bonn, Kekulé-Institute of Organic Chemistry and Biochemistry, Gerhard-Domagk-Str. 1, D-53121 Bonn, Germany
| | - J Alexander Willms
- University of Bonn, Kekulé-Institute of Organic Chemistry and Biochemistry, Gerhard-Domagk-Str. 1, D-53121 Bonn, Germany
| | - S Nozinovic
- University of Bonn, Kekulé-Institute of Organic Chemistry and Biochemistry, Gerhard-Domagk-Str. 1, D-53121 Bonn, Germany
| | - Marianne Engeser
- University of Bonn, Kekulé-Institute of Organic Chemistry and Biochemistry, Gerhard-Domagk-Str. 1, D-53121 Bonn, Germany
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10
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Otake Y, Williams JD, Rincón JA, de Frutos O, Mateos C, Kappe CO. Photochemical benzylic bromination in continuous flow using BrCCl3 and its application to telescoped p-methoxybenzyl protection. Org Biomol Chem 2019; 17:1384-1388. [DOI: 10.1039/c9ob00044e] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Photochemical benzylic bromination in flow using BrCCl3, which is compatible with electron-rich aromatics, allowing in situ p-methoxybenzyl bromide formation and PMB-protection.
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Affiliation(s)
- Yuma Otake
- Institute of Chemistry
- University of Graz
- NAWI Graz
- 8010 Graz
- Austria
| | | | - Juan A. Rincón
- Centro de Investigación Lilly S.A
- 28108 Alcobendas-Madrid
- Spain
| | - Oscar de Frutos
- Centro de Investigación Lilly S.A
- 28108 Alcobendas-Madrid
- Spain
| | - Carlos Mateos
- Centro de Investigación Lilly S.A
- 28108 Alcobendas-Madrid
- Spain
| | - C. Oliver Kappe
- Institute of Chemistry
- University of Graz
- NAWI Graz
- 8010 Graz
- Austria
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11
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Ni S, El Remaily MAEAAA, Franzén J. Carbocation Catalyzed Bromination of Alkyl Arenes, a Chemoselective
sp
3
vs. sp
2
C−H functionalization. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800788] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Shengjun Ni
- KTH, Royal Institute of TechnologySchool of Engineering Sciences in Chemistry, Biotechnology and Health, Department of Chemistry/Division of Organic Chemistry Teknikringen 30 SE-100 44 Stockholm Sweden
| | - Mahmoud Abd El Aleem Ali Ali El Remaily
- KTH, Royal Institute of TechnologySchool of Engineering Sciences in Chemistry, Biotechnology and Health, Department of Chemistry/Division of Organic Chemistry Teknikringen 30 SE-100 44 Stockholm Sweden
- Department of Chemistry, Faculty of ScienceSohag University 82524 Sohag Egypt
| | - Johan Franzén
- KTH, Royal Institute of TechnologySchool of Engineering Sciences in Chemistry, Biotechnology and Health, Department of Chemistry/Division of Organic Chemistry Teknikringen 30 SE-100 44 Stockholm Sweden
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12
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Sandzhieva MA, Aryamova ES, Sukharzhevskii SM, Grinenko EV, Vasilyev AV. Oxidation of Iodo- and Bromo-Substituted Polymethylbenzenes in the System PbO2–CF3COOH–CH2Cl2. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2018. [DOI: 10.1134/s1070428018030053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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