1
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Mikhaylov VN, Balova IA. Alternative Transformations of N-Heterocyclic Carbene Complexes of the Group 11 Metals in Transmetalation Reactions (A Review). RUSS J GEN CHEM+ 2021. [DOI: 10.1134/s1070363221110098] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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2
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Gambacorta G, Sharley JS, Baxendale IR. A comprehensive review of flow chemistry techniques tailored to the flavours and fragrances industries. Beilstein J Org Chem 2021; 17:1181-1312. [PMID: 34136010 PMCID: PMC8182698 DOI: 10.3762/bjoc.17.90] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Accepted: 04/22/2021] [Indexed: 12/28/2022] Open
Abstract
Due to their intrinsic physical properties, which includes being able to perform as volatile liquids at room and biological temperatures, fragrance ingredients/intermediates make ideal candidates for continuous-flow manufacturing. This review highlights the potential crossover between a multibillion dollar industry and the flourishing sub-field of flow chemistry evolving within the discipline of organic synthesis. This is illustrated through selected examples of industrially important transformations specific to the fragrances and flavours industry and by highlighting the advantages of conducting these transformations by using a flow approach. This review is designed to be a compendium of techniques and apparatus already published in the chemical and engineering literature which would constitute a known solution or inspiration for commonly encountered procedures in the manufacture of fragrance and flavour chemicals.
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Affiliation(s)
- Guido Gambacorta
- Department of Chemistry, University of Durham, Stockton Road, Durham, DH1 3LE, United Kingdom
| | - James S Sharley
- Department of Chemistry, University of Durham, Stockton Road, Durham, DH1 3LE, United Kingdom
| | - Ian R Baxendale
- Department of Chemistry, University of Durham, Stockton Road, Durham, DH1 3LE, United Kingdom
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3
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Gisemba SA, Ferracane MJ, Murray TF, Aldrich JV. Conformational Constraint between Aromatic Residue Side Chains in the "Message" Sequence of the Peptide Arodyn Using Ring Closing Metathesis Results in a Potent and Selective Kappa Opioid Receptor Antagonist. J Med Chem 2021; 64:3153-3164. [PMID: 33688737 DOI: 10.1021/acs.jmedchem.0c01984] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Kappa opioid receptor (KOR) antagonists have recently shown potential for treating drug addiction and mood disorders. The linear acetylated dynorphin A analog arodyn (Ac[Phe1,2,3,Arg4,d-Ala8]dynorphin A-(1-11)NH2), synthesized in our laboratory, demonstrated potent and selective KOR antagonism. Cyclization of arodyn could potentially stabilize the bioactive conformation and enhance its metabolic stability. The cyclization strategy employed involved ring closing metathesis between adjacent meta- or para-substituted Tyr(allyl) residues in the "message" sequence that were predicted in a docking study to yield analogs that would bind to the KOR with binding poses similar to arodyn. Consistent with the modeling, the resulting analogs retained KOR affinity similar to arodyn; the peptides involving cyclization between para O-allyl groups also retained high KOR selectivity, with one analog exhibiting KOR antagonist potency (KB = 15 nM) similar to arodyn. These promising cyclized analogs with constrained aromatic residues represent novel leads for further exploration of KOR pharmacology.
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Affiliation(s)
- Solomon A Gisemba
- Department of Medicinal Chemistry, The University of Kansas, Lawrence, Kansas 66045, United States.,Department of Medicinal Chemistry, University of Florida, Gainesville, Florida 32610, United States
| | - Michael J Ferracane
- Department of Medicinal Chemistry, University of Florida, Gainesville, Florida 32610, United States.,Department of Chemistry, University of Redlands, Redlands, California 92373, United States
| | - Thomas F Murray
- Departments of Pharmacology and Neuroscience, School of Medicine, Creighton University, Omaha, Nebraska 68102, United States
| | - Jane V Aldrich
- Department of Medicinal Chemistry, The University of Kansas, Lawrence, Kansas 66045, United States.,Department of Medicinal Chemistry, University of Florida, Gainesville, Florida 32610, United States
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4
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Nascimento DL, Reim I, Foscato M, Jensen VR, Fogg DE. Challenging Metathesis Catalysts with Nucleophiles and Brønsted Base: Examining the Stability of State-of-the-Art Ruthenium Carbene Catalysts to Attack by Amines. ACS Catal 2020; 10:11623-11633. [PMID: 33123412 PMCID: PMC7587145 DOI: 10.1021/acscatal.0c02760] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 08/29/2020] [Indexed: 11/29/2022]
Abstract
Critical to advancing the uptake of olefin metathesis in leading contexts, including pharmaceutical manufacturing, is identification of highly active catalysts that resist decomposition. Amines constitute an aggressive challenge to ruthenium metathesis catalysts. Examined here is the impact of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU), morpholine, n-butylamine, and triethylamine on Ru metathesis catalysts that represent the current state of the art, including cyclic alkyl amino carbene (CAAC) and N-heterocyclic carbene (NHC) complexes. Accordingly, the amine-tolerance of the nitro-Grela catalyst RuCl2(H2IMes)(=CHAr) (nG; Ar = C6H4-2-O i Pr-5-NO2) is compared with that of its CAAC analogues nGC1 and nGC2, and the Hoveyda-class catalyst RuCl2(C2)(=CHAr') HC2 (Ar' = C6H4-2-O i Pr). In C1, the carbene carbon is flanked by an N-2,6-Et2C6H3 group and a CMePh quaternary carbon; in C2, by an N-2- i Pr-6-MeC6H3 group and a CMe2 quaternary carbon. The impact of 1 equiv amine per Ru on turnover numbers (TONs) in ring-closing metathesis of diethyl diallylmalonate was assessed at 9 ppm Ru, at RT and 70 °C. The deleterious impact of amines followed the trend NEt3 ∼ NH2 n Bu ≪ DBU ∼ morpholine. Morpholine is shown to decompose nGC1 by nucleophilic abstraction of the methylidene ligand; DBU, by proton abstraction from the metallacyclobutane. Decomposition was minimized at 70 °C, at which nGC1 enabled TONs of ca. 60 000 even in the presence of morpholine or DBU, vs ca. 80 000 in the absence of base. Unexpectedly, H2IMes catalyst nG delivered 70-90% of the performance of nGC1 at high temperatures, and underwent decomposition by Brønsted base at a similar rate. Density functional theory (DFT) analysis shows that this similarity is due to comparable net electron donation by the H2IMes and C1 ligands. Catalysts bearing the smaller C2 ligand were comparatively insensitive to amines, owing to rapid, preferential bimolecular decomposition.
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Affiliation(s)
- Daniel L. Nascimento
- Center for Catalysis Research & Innovation, and Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Canada K1N 6N5
| | - Immanuel Reim
- Department of Chemistry, University of Bergen, Allégaten 41, N-5007 Bergen, Norway
| | - Marco Foscato
- Department of Chemistry, University of Bergen, Allégaten 41, N-5007 Bergen, Norway
| | - Vidar R. Jensen
- Department of Chemistry, University of Bergen, Allégaten 41, N-5007 Bergen, Norway
| | - Deryn E. Fogg
- Center for Catalysis Research & Innovation, and Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Canada K1N 6N5
- Department of Chemistry, University of Bergen, Allégaten 41, N-5007 Bergen, Norway
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5
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Jongkind LJ, Rahimi M, Poole D, Ton SJ, Fogg DE, Reek JNH. Protection of Ruthenium Olefin Metathesis Catalysts by Encapsulation in a Self‐assembled Resorcinarene Capsule. ChemCatChem 2020. [DOI: 10.1002/cctc.202000111] [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)
- Lukas J. Jongkind
- Homogeneous, Supramolecular and Bio-Inspired Catalysis Van't Hoff Institute for Molecular Sciences University of Amsterdam Science Park 904 1098 XH Amsterdam (The Netherlands
| | - Maryam Rahimi
- Homogeneous, Supramolecular and Bio-Inspired Catalysis Van't Hoff Institute for Molecular Sciences University of Amsterdam Science Park 904 1098 XH Amsterdam (The Netherlands
- Centre for Catalysis Research & Innovation and Department of Chemistry and Biomolecular Sciences University of Ottawa 10 Marie Curie Ottawa ON K1 N 6 N5 Canada
| | - David Poole
- Homogeneous, Supramolecular and Bio-Inspired Catalysis Van't Hoff Institute for Molecular Sciences University of Amsterdam Science Park 904 1098 XH Amsterdam (The Netherlands
| | - Stephanie J. Ton
- Centre for Catalysis Research & Innovation and Department of Chemistry and Biomolecular Sciences University of Ottawa 10 Marie Curie Ottawa ON K1 N 6 N5 Canada
| | - Deryn E. Fogg
- Centre for Catalysis Research & Innovation and Department of Chemistry and Biomolecular Sciences University of Ottawa 10 Marie Curie Ottawa ON K1 N 6 N5 Canada
| | - Joost N. H. Reek
- Homogeneous, Supramolecular and Bio-Inspired Catalysis Van't Hoff Institute for Molecular Sciences University of Amsterdam Science Park 904 1098 XH Amsterdam (The Netherlands
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6
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Sytniczuk A, Milewski M, Kajetanowicz A, Grela K. Preparation of macrocyclic musks via olefin metathesis: comparison with classical syntheses and recent advances. RUSSIAN CHEMICAL REVIEWS 2020. [DOI: 10.1070/rcr4930] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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7
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Gisemba SA, Aldrich JV. Optimized Ring Closing Metathesis Reaction Conditions To Suppress Desallyl Side Products in the Solid-Phase Synthesis of Cyclic Peptides Involving Tyrosine( O-allyl). J Org Chem 2020; 85:1407-1415. [PMID: 31880448 PMCID: PMC8018726 DOI: 10.1021/acs.joc.9b02345] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
We are exploring constraining aromatic residues in the kappa opioid receptor selective antagonist arodyn (Ac[Phe1,2,3,Arg4,d-Ala8]dynorphin A(1-11)-NH2) by ring closing metathesis (RCM) involving tyrosine(O-allyl) (Tyr(All)), but desallyl products limited the yields of the desired cyclic peptide. The model dipeptide Fmoc-Tyr(All)-Tyr(All) was used to explore different reaction conditions, including the use of isomerization suppressants, to minimize formation of the desallyl products and enhance formation of the desired RCM product. Reaction conditions were identified that enhanced the RCM product yield while suppressing desallyl products using both second-generation Grubbs and second-generation Hoveyda-Grubbs catalysts. These optimized reaction conditions were then applied to the cyclization of a tripeptide and an arodyn analog resulting in ≥70% conversion to the desired cyclic peptides. These strategies should be applicable to RCM involving Tyr(All) and similar residues in peptide and peptidomimetic cyclizations performed on solid phase.
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Affiliation(s)
- Solomon A. Gisemba
- Department of Medicinal Chemistry, The University of Kansas, Lawrence, KS 66045
- Department of Medicinal Chemistry, University of Florida, Gainesville, FL 32610
| | - Jane V. Aldrich
- Department of Medicinal Chemistry, The University of Kansas, Lawrence, KS 66045
- Department of Medicinal Chemistry, University of Florida, Gainesville, FL 32610
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8
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Nascimento DL, Gawin A, Gawin R, Guńka PA, Zachara J, Skowerski K, Fogg DE. Integrating Activity with Accessibility in Olefin Metathesis: An Unprecedentedly Reactive Ruthenium-Indenylidene Catalyst. J Am Chem Soc 2019; 141:10626-10631. [PMID: 31248254 DOI: 10.1021/jacs.9b05362] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Access to leading olefin metathesis catalysts, including the Grubbs, Hoveyda, and Grela catalysts, ultimately rests on the nonscaleable transfer of a benzylidene ligand from an unstable, impure aryldiazomethane. The indenylidene ligand can be reliably installed, but to date yields much less reactive catalysts. A fast-initiating, dimeric indenylidene complex (Ru-1) is reported, which reconciles high activity with scaleable synthesis. Each Ru center in Ru-1 is stabilized by a state-of-the-art cyclic alkyl amino carbene (CAAC, C1) and a bridging chloride donor: the lability of the latter elevates the reactivity of Ru-1 to a level previously attainable only with benzylidene derivatives. Evaluation of initiation rate constants reveals that Ru-1 initiates >250× faster than indenylidene catalyst M2 (RuCl2(H2IMes)(PCy3)(Ind)), and 65× faster than UC (RuCl2(C1)2(Ind)). The slow initiation previously regarded as characteristic of indenylidene catalysts is hence due to low ligand lability, not inherently slow cycloaddition at the Ru=CRR' site. In macrocyclization and "ethenolysis" of methyl oleate (i.e., transformation into α-olefins via cross-metathesis with C2H4), Ru-1 is comparable or superior to the corresponding, breakthrough CAAC-benzylidene catalyst. In ethenolysis, Ru-1 is 5× more robust to standard-grade (99.9%) C2H4 than the top-performing catalyst, probably reflecting steric protection at the quaternary CAAC carbon.
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Affiliation(s)
- Daniel L Nascimento
- Center for Catalysis Research and Innovation, and Department of Chemistry and Biomolecular Sciences , University of Ottawa , Ottawa , Ontario K1N 6N5 , Canada
| | - Anna Gawin
- Apeiron Synthesis , Duńska 9 , 54-427 Wrocław , Poland
| | - Rafał Gawin
- Apeiron Synthesis , Duńska 9 , 54-427 Wrocław , Poland
| | - Piotr A Guńka
- Faculty of Chemistry , Warsaw University of Technology , Noakowskiego 3 , 00-664 Warsaw , Poland
| | - Janusz Zachara
- Faculty of Chemistry , Warsaw University of Technology , Noakowskiego 3 , 00-664 Warsaw , Poland
| | | | - Deryn E Fogg
- Center for Catalysis Research and Innovation, and Department of Chemistry and Biomolecular Sciences , University of Ottawa , Ottawa , Ontario K1N 6N5 , Canada
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9
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Müller DS, Raoul Y, Le Nôtre J, Baslé O, Mauduit M. In Situ Generation of Ru-Based Metathesis Catalyst. A Systematic Study. ACS Catal 2019. [DOI: 10.1021/acscatal.9b00244] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Daniel S. Müller
- Univ Rennes, Ecole Nationale Supérieure de Chimie de Rennes, CNRS, ISCR UMR 6226, F-35000 Rennes, France
| | - Yann Raoul
- OLEON SAS, Venette BP 20609, 60206 Compiègne Cedex, France
| | - Jérôme Le Nôtre
- PIVERT SAS, Rue les Rives de l’Oise CS50149, 60201 Compiègne Cedex, France
| | - Olivier Baslé
- Univ Rennes, Ecole Nationale Supérieure de Chimie de Rennes, CNRS, ISCR UMR 6226, F-35000 Rennes, France
| | - Marc Mauduit
- Univ Rennes, Ecole Nationale Supérieure de Chimie de Rennes, CNRS, ISCR UMR 6226, F-35000 Rennes, France
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10
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Morin É, Sosoe J, Raymond M, Amorelli B, Boden RM, Collins SK. Synthesis of a Renewable Macrocyclic Musk: Evaluation of Batch, Microwave, and Continuous Flow Strategies. Org Process Res Dev 2019. [DOI: 10.1021/acs.oprd.8b00450] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Émilie Morin
- Department of Chemistry and Centre for Green Chemistry and Catalysis, Université de Montréal, CP 6128 Station Downtown, Montréal, Québec, Canada H3C 3J7
| | - Johann Sosoe
- Department of Chemistry and Centre for Green Chemistry and Catalysis, Université de Montréal, CP 6128 Station Downtown, Montréal, Québec, Canada H3C 3J7
| | - Michaël Raymond
- Department of Chemistry and Centre for Green Chemistry and Catalysis, Université de Montréal, CP 6128 Station Downtown, Montréal, Québec, Canada H3C 3J7
| | - Benjamin Amorelli
- Research & Development, International Flavors & Fragrances Inc., 1515 State Route 36, Union Beach, New Jersey 07735, United States
| | - Richard M. Boden
- Research & Development, International Flavors & Fragrances Inc., 1515 State Route 36, Union Beach, New Jersey 07735, United States
| | - Shawn K. Collins
- Department of Chemistry and Centre for Green Chemistry and Catalysis, Université de Montréal, CP 6128 Station Downtown, Montréal, Québec, Canada H3C 3J7
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11
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Peschek N, Wannowius KJ, Plenio H. The Initiation Reaction of Hoveyda–Grubbs Complexes with Ethene. ACS Catal 2019. [DOI: 10.1021/acscatal.8b03445] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Natalie Peschek
- Organometallic Chemistry, Technische Universität Darmstadt, Alarich-Weiss-Str. 12, 64287 Darmstadt, Germany
| | - Klaus-Jürgen Wannowius
- Organometallic Chemistry, Technische Universität Darmstadt, Alarich-Weiss-Str. 12, 64287 Darmstadt, Germany
| | - Herbert Plenio
- Organometallic Chemistry, Technische Universität Darmstadt, Alarich-Weiss-Str. 12, 64287 Darmstadt, Germany
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12
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Dumas A, Colombel-Rouen S, Curbet I, Forcher G, Tripoteau F, Caijo F, Queval P, Rouen M, Baslé O, Mauduit M. Highly selective macrocyclic ring-closing metathesis of terminal olefins in non-chlorinated solvents at low dilution. Catal Sci Technol 2019. [DOI: 10.1039/c8cy02115e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
New ruthenium complexes featuring two unsymmetrical NHCs proved to be highly selective in macrocyclic RCM performed in green solvents at low dilution.
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Affiliation(s)
- Adrien Dumas
- Univ Rennes
- Ecole Nationale Supérieure de Chimie de Rennes
- CNRS
- F-35000 Rennes
- France
| | | | - Idriss Curbet
- Univ Rennes
- Ecole Nationale Supérieure de Chimie de Rennes
- CNRS
- F-35000 Rennes
- France
| | - Gwénael Forcher
- Univ Rennes
- Ecole Nationale Supérieure de Chimie de Rennes
- CNRS
- F-35000 Rennes
- France
| | | | | | | | | | - Olivier Baslé
- Univ Rennes
- Ecole Nationale Supérieure de Chimie de Rennes
- CNRS
- F-35000 Rennes
- France
| | - Marc Mauduit
- Univ Rennes
- Ecole Nationale Supérieure de Chimie de Rennes
- CNRS
- F-35000 Rennes
- France
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13
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Hegmann N, Prusko L, Diesendorf N, Heinrich MR. In Situ Conformational Fixation of the Amide Bond Enables General Access to Medium-Sized Lactams via Ring-Closing Metathesis. Org Lett 2018; 20:7825-7829. [DOI: 10.1021/acs.orglett.8b03320] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Nina Hegmann
- Department of Chemistry and Pharmacy; Pharmaceutical Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Nikolaus-Fiebiger-Str. 10, 91058 Erlangen, Germany
| | - Lea Prusko
- Department of Chemistry and Pharmacy; Pharmaceutical Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Nikolaus-Fiebiger-Str. 10, 91058 Erlangen, Germany
| | - Nina Diesendorf
- Department of Chemistry and Pharmacy; Pharmaceutical Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Nikolaus-Fiebiger-Str. 10, 91058 Erlangen, Germany
| | - Markus R. Heinrich
- Department of Chemistry and Pharmacy; Pharmaceutical Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Nikolaus-Fiebiger-Str. 10, 91058 Erlangen, Germany
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14
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Kadyrov R. Reduction of Amides to Amines under Mild Conditions via Catalytic Hydrogenation of Amide Acetals and Imidates. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800855] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Renat Kadyrov
- Evonik Resource Efficiency GmbH Rodenbacher Chaussee 4 63457 Hanau-Wolfgang Germany
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15
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Smoleń M, Kośnik W, Gajda R, Woźniak K, Skoczeń A, Kajetanowicz A, Grela K. Ruthenium Complexes Bearing Thiophene‐Based Unsymmetrical
N
‐Heterocyclic Carbene Ligands as Selective Catalysts for Olefin Metathesis in Toluene and Environmentally Friendly 2‐Methyltetrahydrofuran. Chemistry 2018; 24:15372-15379. [DOI: 10.1002/chem.201803460] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Revised: 08/02/2018] [Indexed: 11/09/2022]
Affiliation(s)
- Michał Smoleń
- Faculty of ChemistryBiological and Chemical Research CentreUniversity of Warsaw Żwirki i Wigury 101 02-089 Warsaw Poland
| | - Wioletta Kośnik
- Faculty of ChemistryBiological and Chemical Research CentreUniversity of Warsaw Żwirki i Wigury 101 02-089 Warsaw Poland
| | - Roman Gajda
- Faculty of ChemistryBiological and Chemical Research CentreUniversity of Warsaw Żwirki i Wigury 101 02-089 Warsaw Poland
| | - Krzysztof Woźniak
- Faculty of ChemistryBiological and Chemical Research CentreUniversity of Warsaw Żwirki i Wigury 101 02-089 Warsaw Poland
| | - Aleksandra Skoczeń
- Faculty of ChemistryBiological and Chemical Research CentreUniversity of Warsaw Żwirki i Wigury 101 02-089 Warsaw Poland
| | - Anna Kajetanowicz
- Faculty of ChemistryBiological and Chemical Research CentreUniversity of Warsaw Żwirki i Wigury 101 02-089 Warsaw Poland
| | - Karol Grela
- Faculty of ChemistryBiological and Chemical Research CentreUniversity of Warsaw Żwirki i Wigury 101 02-089 Warsaw Poland
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16
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Sytniczuk A, Forcher G, Grotjahn DB, Grela K. Sequential Alkene Isomerization and Ring-Closing Metathesis in Production of Macrocyclic Musks from Biomass. Chemistry 2018; 24:10403-10408. [PMID: 29931831 DOI: 10.1002/chem.201800728] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Revised: 04/16/2018] [Indexed: 11/10/2022]
Abstract
We report successful utilization of sequential alkene isomerization and ring-closing metathesis of dec-9-enoic acid based dienes in synthesis of macrocyclic lactones that possess a strong scent of musk. This catalytic sequence was essential to trim the chain length of starting dienes to yield macrocycles of the right size. Dec-9-enoic acid is conveniently obtainable from oleic esters by Ru-catalysed ethenolysis.
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Affiliation(s)
- Adrian Sytniczuk
- Biological and Chemical Research Centre, Faculty of Chemistry, University of Warsaw, Żwirki i Wigury 101, 02-089, Warsaw, Poland
| | - Gwénaël Forcher
- Biological and Chemical Research Centre, Faculty of Chemistry, University of Warsaw, Żwirki i Wigury 101, 02-089, Warsaw, Poland
| | - Douglas B Grotjahn
- Department of Chemistry and Biochemistry, San Diego State University, 5500 Campanile Drive, San Diego, California, 92182-1030, USA
| | - Karol Grela
- Biological and Chemical Research Centre, Faculty of Chemistry, University of Warsaw, Żwirki i Wigury 101, 02-089, Warsaw, Poland.,Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, P.O. Box 58, 01-224, Warsaw, Poland
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17
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Gawin A, Pump E, Slugovc C, Kajetanowicz A, Grela K. Ruthenium Amide Complexes – Synthesis and Catalytic Activity in Olefin Metathesis and in Ring‐Opening Polymerisation. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800251] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Anna Gawin
- Biological and Chemical Research Centre Faculty of Chemistry University of Warsaw Żwirki i Wigury Street 101 02‐089 Warsaw Poland
| | - Eva Pump
- Institute of Chemistry and Technology Graz University of Technolgy Stremayrgasse 9 801‐0 Graz Austria
| | - Christian Slugovc
- Institute of Chemistry and Technology Graz University of Technolgy Stremayrgasse 9 801‐0 Graz Austria
| | - Anna Kajetanowicz
- Biological and Chemical Research Centre Faculty of Chemistry University of Warsaw Żwirki i Wigury Street 101 02‐089 Warsaw Poland
| | - Karol Grela
- Biological and Chemical Research Centre Faculty of Chemistry University of Warsaw Żwirki i Wigury Street 101 02‐089 Warsaw Poland
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18
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Higman CS, Nascimento DL, Ireland BJ, Audörsch S, Bailey GA, McDonald R, Fogg DE. Chelate-Assisted Ring-Closing Metathesis: A Strategy for Accelerating Macrocyclization at Ambient Temperatures. J Am Chem Soc 2018; 140:1604-1607. [DOI: 10.1021/jacs.7b13257] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Carolyn S. Higman
- Center for Catalysis Research & Innovation, and Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Canada K1N 6N5
| | - Daniel L. Nascimento
- Center for Catalysis Research & Innovation, and Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Canada K1N 6N5
| | - Benjamin J. Ireland
- Center for Catalysis Research & Innovation, and Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Canada K1N 6N5
| | - Stephan Audörsch
- Center for Catalysis Research & Innovation, and Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Canada K1N 6N5
| | - Gwendolyn A. Bailey
- Center for Catalysis Research & Innovation, and Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Canada K1N 6N5
| | - Robert McDonald
- X-Ray
Crystallography Laboratory, University of Alberta, Edmonton, Canada T6G 2G2
| | - Deryn E. Fogg
- Center for Catalysis Research & Innovation, and Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Canada K1N 6N5
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19
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Engel J, Smit W, Foscato M, Occhipinti G, Törnroos KW, Jensen VR. Loss and Reformation of Ruthenium Alkylidene: Connecting Olefin Metathesis, Catalyst Deactivation, Regeneration, and Isomerization. J Am Chem Soc 2017; 139:16609-16619. [DOI: 10.1021/jacs.7b07694] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Julien Engel
- Institute
of Organic Chemistry, RWTH Aachen University, Landoltweg 1, D-52074 Aachen, Germany
| | - Wietse Smit
- Department
of Chemistry, University of Bergen, Allégaten 41, N-5007 Bergen, Norway
| | - Marco Foscato
- Department
of Chemistry, University of Bergen, Allégaten 41, N-5007 Bergen, Norway
| | - Giovanni Occhipinti
- Department
of Chemistry, University of Bergen, Allégaten 41, N-5007 Bergen, Norway
| | - Karl W. Törnroos
- Department
of Chemistry, University of Bergen, Allégaten 41, N-5007 Bergen, Norway
| | - Vidar R. Jensen
- Department
of Chemistry, University of Bergen, Allégaten 41, N-5007 Bergen, Norway
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20
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Gawin R, Tracz A, Chwalba M, Kozakiewicz A, Trzaskowski B, Skowerski K. Cyclic Alkyl Amino Ruthenium Complexes—Efficient Catalysts for Macrocyclization and Acrylonitrile Cross Metathesis. ACS Catal 2017. [DOI: 10.1021/acscatal.7b00597] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Rafał Gawin
- Apeiron Synthesis
SA ul., Duńska 9, 54-427 Wrocław, Poland
| | - Andrzej Tracz
- Apeiron Synthesis
SA ul., Duńska 9, 54-427 Wrocław, Poland
| | - Michał Chwalba
- Apeiron Synthesis
SA ul., Duńska 9, 54-427 Wrocław, Poland
| | - Anna Kozakiewicz
- Faculty
of Chemistry, University of Nicolaus Copernicus, Gagarina 7, 87-100 Toruń, Poland
| | - Bartosz Trzaskowski
- Centre
of New Technologies, University of Warsaw, Banacha 2c, 02-097 Warszawa, Poland
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21
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Yoshioka E, Kohtani S, Jichu T, Fukazawa T, Nagai T, Kawashima A, Takemoto Y, Miyabe H. Aqueous-Medium Carbon-Carbon Bond-Forming Radical Reactions Catalyzed by Excited Rhodamine B as a Metal-Free Organic Dye under Visible Light Irradiation. J Org Chem 2016; 81:7217-29. [PMID: 27314306 DOI: 10.1021/acs.joc.6b01102] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The utility of rhodamine B as a water-soluble organic photocatalyst was studied in the cascade radical addition-cyclization-trapping reactions under visible light irradiation. In the presence of (i-Pr)2NEt, the electron transfer from the excited rhodamine B to perfluoroalkyl iodides proceeded smoothly to promote the carbon-carbon bond-forming radical reactions in aqueous media. When i-C3F7I was employed as a radical precursor, the aqueous-medium radical reactions proceeded even in the absence of (i-Pr)2NEt. In these reactions, the direct electron transfer from the excited singlet state of rhodamine B would take place. Furthermore, the cleavage of the C-I bond in less reactive i-PrI could be achieved by the reductive electron transfer from the excited rhodamine B, which was confirmed by the fluorescence quenching of rhodamine B with the addition of i-PrI.
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Affiliation(s)
- Eito Yoshioka
- School of Pharmacy, Hyogo University of Health Sciences , Minatojima, Chuo-ku, Kobe, 650-8530, Japan
| | - Shigeru Kohtani
- School of Pharmacy, Hyogo University of Health Sciences , Minatojima, Chuo-ku, Kobe, 650-8530, Japan
| | - Takahisa Jichu
- School of Pharmacy, Hyogo University of Health Sciences , Minatojima, Chuo-ku, Kobe, 650-8530, Japan
| | - Takuya Fukazawa
- School of Pharmacy, Hyogo University of Health Sciences , Minatojima, Chuo-ku, Kobe, 650-8530, Japan
| | - Toyokazu Nagai
- School of Pharmacy, Hyogo University of Health Sciences , Minatojima, Chuo-ku, Kobe, 650-8530, Japan
| | - Akira Kawashima
- School of Pharmacy, Hyogo University of Health Sciences , Minatojima, Chuo-ku, Kobe, 650-8530, Japan
| | - Yoshiji Takemoto
- Graduate School of Pharmaceutical Sciences, Kyoto University , Yoshida, Sakyo-ku, Kyoto 606-8501, Japan
| | - Hideto Miyabe
- School of Pharmacy, Hyogo University of Health Sciences , Minatojima, Chuo-ku, Kobe, 650-8530, Japan
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22
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Alexander KA, Paulhus EA, Lazarus GM, Leadbeater NE. Exploring the reactivity of a ruthenium complex in the metathesis of biorenewable feedstocks to generate value-added chemicals. J Organomet Chem 2016. [DOI: 10.1016/j.jorganchem.2015.09.018] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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23
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Ehbets J, Lorenzen S, Mahler C, Bertermann R, Berkefeld A, Poater J, Fritz‐Langhals E, Weidner R, Bickelhaupt FM, Tacke R. Synthesis and Hydrolysis of Alkoxy(aminoalkyl)diorganylsilanes of the Formula Type R
2
(RO)Si(CH
2
)
n
NH
2
(R = Alkyl,
n
= 1–3): A Systematic Experimental and Computational Study. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600077] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Julia Ehbets
- Universität Würzburg, Institut für Anorganische Chemie, Am Hubland, 97074 Würzburg, Germany, http://www‐anorganik.chemie.uni‐wuerzburg.de
| | - Sabine Lorenzen
- Universität Würzburg, Institut für Anorganische Chemie, Am Hubland, 97074 Würzburg, Germany, http://www‐anorganik.chemie.uni‐wuerzburg.de
| | - Christoph Mahler
- Universität Würzburg, Institut für Anorganische Chemie, Am Hubland, 97074 Würzburg, Germany, http://www‐anorganik.chemie.uni‐wuerzburg.de
| | - Rüdiger Bertermann
- Universität Würzburg, Institut für Anorganische Chemie, Am Hubland, 97074 Würzburg, Germany, http://www‐anorganik.chemie.uni‐wuerzburg.de
| | - André Berkefeld
- Universität Würzburg, Institut für Anorganische Chemie, Am Hubland, 97074 Würzburg, Germany, http://www‐anorganik.chemie.uni‐wuerzburg.de
| | - Jordi Poater
- VU University Amsterdam, Department of Theoretical Chemistry, Amsterdam Center for Multiscale Modeling (ACMM), De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands, http://www.few.vu.nl/~bickel
- Universitat de Barcelona, Departament de Química Orgànica & Institució Catalana de Recerca i Estudis Avançats (ICREA), 08010 Barcelona, Catalonia, Spain
| | - Elke Fritz‐Langhals
- Wacker Chemie AG, Consortium für elektrochemische Industrie, Zielstattstrasse 20, 81379 München, Germany
| | - Richard Weidner
- Wacker Chemie AG, Consortium für elektrochemische Industrie, Zielstattstrasse 20, 81379 München, Germany
| | - F. Matthias Bickelhaupt
- VU University Amsterdam, Department of Theoretical Chemistry, Amsterdam Center for Multiscale Modeling (ACMM), De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands, http://www.few.vu.nl/~bickel
- Radboud University Nijmegen, Institute for Molecules and Materials, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands
| | - Reinhold Tacke
- Universität Würzburg, Institut für Anorganische Chemie, Am Hubland, 97074 Würzburg, Germany, http://www‐anorganik.chemie.uni‐wuerzburg.de
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24
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Schleicher D, Tronnier A, Leopold H, Borrmann H, Strassner T. Unusual dimer formation of cyclometalated ruthenium NHC p-cymene complexes. Dalton Trans 2016; 45:3260-3. [DOI: 10.1039/c6dt00100a] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Abstraction of a chloride ion in p-cymene ruthenium(ii) complexes bearing cyclometalated NHC ligands selectively leads to the formation of mono-ion-bridged ruthenium dimers.
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Affiliation(s)
- David Schleicher
- Physikalische Organische Chemie
- Technische Universität Dresden
- 01069 Dresden
- Germany
| | - Alexander Tronnier
- Physikalische Organische Chemie
- Technische Universität Dresden
- 01069 Dresden
- Germany
| | - Hendrik Leopold
- Physikalische Organische Chemie
- Technische Universität Dresden
- 01069 Dresden
- Germany
| | - Horst Borrmann
- Max-Planck-Institut für Chemische Physik fester Stoffe
- 01187 Dresden
- Germany
| | - Thomas Strassner
- Physikalische Organische Chemie
- Technische Universität Dresden
- 01069 Dresden
- Germany
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25
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Hübner S, de Vries JG, Farina V. Why Does Industry Not Use Immobilized Transition Metal Complexes as Catalysts? Adv Synth Catal 2015. [DOI: 10.1002/adsc.201500846] [Citation(s) in RCA: 270] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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26
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Affiliation(s)
- Renat Kadyrov
- Evonik Resource Efficiency GmbH; Rodenbacher Chaussee 4 63457 Hanau-Wolfgang Germany), Fax: (+49) 6181-59-2417
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27
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Borguet Y, Zaragoza G, Demonceau A, Delaude L. Ruthenium catalysts bearing a benzimidazolylidene ligand for the metathetical ring-closure of tetrasubstituted cycloolefins. Dalton Trans 2015; 44:9744-55. [PMID: 25734488 DOI: 10.1039/c5dt00433k] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Deprotonation of 1,3-di(2-tolyl)benzimidazolium tetrafluoroborate with a strong base afforded 1,3-di(2-tolyl)benzimidazol-2-ylidene (BTol), which dimerized progressively into the corresponding dibenzotetraazafulvalene. The complexes [RhCl(COD)(BTol)] (COD is 1,5-cyclooctadiene) and cis-[RhCl(CO)2(BTol)] were synthesized to probe the steric and electronic parameters of BTol. Comparison of the percentage of buried volume (%VBur) and of the Tolman electronic parameter (TEP) of BTol with those determined previously for 1,3-dimesitylbenzimidazol-2-ylidene (BMes) revealed that the two N-heterocyclic carbenes displayed similar electron donicities, yet the 2-tolyl substituents took a slightly greater share of the rhodium coordination sphere than the mesityl groups, due to a more pronounced tilt. The anti,anti conformation adopted by BTol in the molecular structure of [RhCl(COD)(BTol)] ensured nonetheless a remarkably unhindered access to the metal center, as evidenced by steric maps. Second-generation ruthenium-benzylidene and isopropoxybenzylidene complexes featuring the BTol ligand were obtained via phosphine exchange from the first generation Grubbs and Hoveyda-Grubbs catalysts, respectively. The atropisomerism of the 2-tolyl substituents within [RuCl2(=CHPh)(PCy3)(BTol)] was investigated by using variable temperature NMR spectroscopy, and the molecular structures of all four possible rotamers of [RuCl2(=CH-o-O(i)PrC6H4)(BTol)] were determined by X-ray crystallography. Both complexes were highly active at promoting the ring-closing metathesis (RCM) of model α,ω-dienes. The replacement of BMes with BTol was particularly beneficial to achieve the ring-closure of tetrasubstituted cycloalkenes. More specifically, the stable isopropoxybenzylidene chelate enabled an almost quantitative RCM of two challenging substrates, viz., diethyl 2,2-bis(2-methylallyl)malonate and N,N-bis(2-methylallyl)tosylamide, within a few hours at 60 °C.
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Affiliation(s)
- Yannick Borguet
- Laboratory of Organometallic Chemistry and Homogeneous Catalysis, Institut de Chimie (B6a), Université de Liège, Sart-Tilman par 4000, Liège, Belgium.
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28
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Heidt T, Baro A, Köhn A, Laschat S. Synthesis of Cembranoid Analogues through Ring-Closing Metathesis of Terpenoid Precursors: A Challenge Regarding Ring-Size Selectivity. Chemistry 2015; 21:12396-404. [PMID: 26227568 DOI: 10.1002/chem.201502051] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Indexed: 11/11/2022]
Affiliation(s)
- Tanja Heidt
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart (Germany)
| | - Angelika Baro
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart (Germany)
| | - Andreas Köhn
- Institut für Theoretische Chemie, Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart (Germany)
| | - Sabine Laschat
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart (Germany).
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29
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Evaluation of an olefin metathesis pre-catalyst with a bulky and electron-rich N-heterocyclic carbene. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2014.12.040] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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30
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The chemistry of the carbon-transition metal double and triple bond: Annual survey covering the year 2013. Coord Chem Rev 2015. [DOI: 10.1016/j.ccr.2014.09.021] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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31
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Arndt HD, Rizzo S, Nöcker C, Wakchaure VN, Milroy LG, Bieker V, Calderon A, Tran TTN, Brand S, Dehmelt L, Waldmann H. Divergent solid-phase synthesis of natural product-inspired bipartite cyclodepsipeptides: total synthesis of seragamide A. Chemistry 2015; 21:5311-6. [PMID: 25694199 DOI: 10.1002/chem.201500368] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Indexed: 11/06/2022]
Abstract
Macrocyclic natural products (NPs) and analogues thereof often show high affinity, selectivity, and metabolic stability, and methods for the synthesis of NP-like macrocycle collections are of major current interest. We report an efficient solid-phase/cyclorelease method for the synthesis of a collection of macrocyclic depsipeptides with bipartite peptide/polyketide structure inspired by the very potent F-actin stabilizing depsipeptides of the jasplakinolide/geodiamolide class. The method includes the assembly of an acyclic precursor chain on a polymeric carrier, terminated by olefins that constitute complementary fragments of the polyketide section and cyclization by means of a relay-ring-closing metathesis (RRCM). The method was validated in the first total synthesis of the actin-stabilizing cyclodepsipeptide seragamide A and the synthesis of a collection of structurally diverse bipartite depsipeptides.
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Affiliation(s)
- Hans-Dieter Arndt
- Max-Planck-Institute of Molecular Physiology, Otto-Hahn-Strasse 11, 44227 Dortmund (Germany), Fax: (+49) 3641948212; Friedrich-Schiller-Universität, Institute of Organic and Macromolecular Chemistry, Humboldtstrasse 10, 07743 Jena (Germany).
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32
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Do JL, Mottillo C, Tan D, Štrukil V, Friščić T. Mechanochemical ruthenium-catalyzed olefin metathesis. J Am Chem Soc 2015; 137:2476-9. [PMID: 25668586 DOI: 10.1021/jacs.5b00151] [Citation(s) in RCA: 119] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
We describe the development of a mechanochemical approach for Ru-catalyzed olefin metathesis, including cross-metathesis and ring-closing metathesis. The method uses commercially available catalysts to achieve high-yielding, rapid, room-temperature metathesis of solid or liquid olefins on a multigram scale using either no or only a catalytic amount of a liquid.
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Affiliation(s)
- Jean-Louis Do
- Department of Chemistry, FRQNT Centre for Green Chemistry and Catalysis, McGill University , Montreal, Quebec, Canada H3A 2K6
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33
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Yoshioka E, Kohtani S, Tanaka E, Hata Y, Miyabe H. Carbon radical addition–cyclization reaction induced by ruthenium-photocatalyst under visible light irradiation. Tetrahedron 2015. [DOI: 10.1016/j.tet.2014.12.068] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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34
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Scherbakow S, Keller M, Bannwarth W. Modulation of Olefin Metathesis Reactions by Chelation. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402319] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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35
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Ablialimov O, Kędziorek M, Malińska M, Woźniak K, Grela K. Synthesis, Structure, and Catalytic Activity of New Ruthenium(II) Indenylidene Complexes Bearing Unsymmetrical N-Heterocyclic Carbenes. Organometallics 2014. [DOI: 10.1021/om4009197] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Osman Ablialimov
- Department
of Chemistry, University of Warsaw, Żwirki i Wigury Street 101, 02-089 Warsaw, Poland
| | - Mariusz Kędziorek
- Department
of Chemistry, University of Warsaw, Żwirki i Wigury Street 101, 02-089 Warsaw, Poland
| | - Maura Malińska
- Department
of Chemistry, University of Warsaw, Żwirki i Wigury Street 101, 02-089 Warsaw, Poland
| | - Krzysztof Woźniak
- Department
of Chemistry, University of Warsaw, Żwirki i Wigury Street 101, 02-089 Warsaw, Poland
| | - Karol Grela
- Department
of Chemistry, University of Warsaw, Żwirki i Wigury Street 101, 02-089 Warsaw, Poland
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36
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Lübbe C, Dumrath A, Neumann H, Schäffer M, Zimmermann R, Beller M, Kadyrov R. How Important are Impurities in Catalysis? An Example from Ring-Closing Metathesis. ChemCatChem 2014. [DOI: 10.1002/cctc.201300779] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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37
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Skowerski K, Czarnocki SJ, Knapkiewicz P. Tube-in-tube reactor as a useful tool for homo- and heterogeneous olefin metathesis under continuous flow mode. CHEMSUSCHEM 2014; 7:536-42. [PMID: 24167003 DOI: 10.1002/cssc.201300829] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2013] [Indexed: 05/20/2023]
Abstract
A tube-in-tube reactor was successfully applied in homo- and heterogeneous olefin metathesis reactions under continuous flow mode. It was shown that the efficient removal of ethylene facilitated by connection of the reactor with a vacuum pump significantly improves the outcome of metathesis reactions. The beneficial aspects of this approach are most apparent in reactions performed at low concentration, such as macrocyclization reactions. The established system allows achievement of both improved yield and selectivity, and is ideal for industrial applications.
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38
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Lazzari D, Cassani MC, Anna Brucka M, Solinas G, Pretto M. Solvent-free catalytic isomerization of perfluoroalkyl allyl ethers. NEW J CHEM 2014. [DOI: 10.1039/c3nj01300f] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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39
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40
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Lübbe C, Dumrath A, Neumann H, Beller M, Kadyrov R. Lewis Acid Assisted Ruthenium-Catalyzed Metathesis Reactions. ChemCatChem 2013. [DOI: 10.1002/cctc.201300675] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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41
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Sundararaju B, Sridhar T, Achard M, Sharma GVM, Bruneau C. Ring Closing and Macrocyclization of β-Dipeptides by Olefin Metathesis. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300608] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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42
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Czaban J, Schertzer BM, Grela K. Low Catalyst Loadings in Self-Metathesis of 1-Dodecene. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201200713] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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