401
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Tolnai GL, Pethő B, Králl P, Novák Z. Palladium-Catalyzed Methoxylation of Aromatic Chlorides with Borate Salts. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201300687] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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402
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Bąchor R, Setner B, Kluczyk A, Stefanowicz P, Szewczuk Z. The unusual hydrogen-deuterium exchange of α-carbon protons in N-substituted glycine-containing peptides. JOURNAL OF MASS SPECTROMETRY : JMS 2014; 49:43-49. [PMID: 24446262 DOI: 10.1002/jms.3318] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2013] [Revised: 11/07/2013] [Accepted: 11/21/2013] [Indexed: 06/03/2023]
Abstract
Hydrogens connected to α-carbon (α-C) of amino acid residues are usually resistant to hydrogen-deuterium exchange (HDX) unless reaction conditions promote racemization. Although N-methylglycine (sarcosine) residue has been found in biologically active peptide such as cyclosporine, to the best of our knowledge, the HDX of α-C protons of this residue was not explored yet. Here, we presented a new and efficient methodology of α-C deuteration in sarcosine residues under basic aqueous conditions. The deuterons, introduced at α-C atom, do not undergo back-exchange in acidic aqueous solution. The electrospray ionization-MS and MS/MS experiments on proposed model peptides confirmed the HDX at α-C and revealed the unexpected hydrogen scrambling in sarcosine-containing peptides. Although the observed HDX of α-C protons is only successful in N-acylglycine when the amide possesses a certain degree of alkylation, it offers a new approach to the analysis of sarcosine-containing peptides such as cyclosporine.
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Affiliation(s)
- Remigiusz Bąchor
- Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, Wroclaw, Poland
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403
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Schmidt D, Zell T, Schaub T, Radius U. Si–H bond activation at {(NHC)2Ni0} leading to hydrido silyl and bis(silyl) complexes: a versatile tool for catalytic Si–H/D exchange, acceptorless dehydrogenative coupling of hydrosilanes, and hydrogenation of disilanes to hydrosilanes. Dalton Trans 2014; 43:10816-27. [DOI: 10.1039/c4dt01250j] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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404
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Abstract
Deuterium, the stable isotope of hydrogen, is known to medicinal chemists for its utility in mechanistic, spectroscopic, and tracer studies. In fact, well-known applications utilizing deuterium exist within every subdiscipline in pharmaceutical discovery and development. Recent emphasis on incorporation of deuterium into the active pharmaceutical ingredient has come about as a result of inquiries into the potential for substantial benefits of the deuterium kinetic isotope effect on the safety and disposition of the drug substance. This Perspective traces the author's experience in reviving and expanding this potential utility, first suggested many decades prior by the discoverer of this, the simplest of all isotopes.
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Affiliation(s)
- Thomas G Gant
- Recondite Falls Discovery, LLC , Greengarden Blvd, Erie, Pennsylvania 16509 United States
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405
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Ma S, Villa G, Thuy-Boun PS, Homs A, Yu JQ. Palladium-Catalyzedortho-Selective CH Deuteration of Arenes: Evidence for Superior Reactivity of Weakly Coordinated Palladacycles. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201305388] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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406
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Ma S, Villa G, Thuy-Boun PS, Homs A, Yu JQ. Palladium-catalyzed ortho-selective C-H deuteration of arenes: evidence for superior reactivity of weakly coordinated palladacycles. Angew Chem Int Ed Engl 2013; 53:734-7. [PMID: 24288176 DOI: 10.1002/anie.201305388] [Citation(s) in RCA: 149] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2013] [Revised: 10/30/2013] [Indexed: 11/07/2022]
Abstract
We disclose a protocol for the palladium-catalyzed ortho-selective C-H deuteration of arenes. Phenylacetic acids and benzoic acids are suitable substrates for this reaction. This reaction offers a catalytic route to ortho-deuterated phenylacetic acids and benzoic acids and demonstrates the sharp difference in reactivity of palladacycle intermediates held together by weak and strong coordination.
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Affiliation(s)
- Sandy Ma
- Department of Chemistry, The Scripps Research Institute (TSRI), 10550 North Torrey Pines Road, La Jolla, CA 92037 (USA) http://www.scripps.edu/chem/yu
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407
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Kluge T, Bette M, Rüffer T, Bruhn C, Wagner C, Ströhl D, Schmidt J, Steinborn D. Activation of Acetyl Ligands through Hydrogen Bonds: A New Way to Platinum(II) Complexes Bearing Protonated Iminoacetyl Ligands. Organometallics 2013. [DOI: 10.1021/om400812w] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Tim Kluge
- Institute
of Chemistry, Martin Luther University Halle-Wittenberg, Kurt-Mothes-Straße 2, D-06120 Halle, Germany
| | - Martin Bette
- Institute
of Chemistry, Martin Luther University Halle-Wittenberg, Kurt-Mothes-Straße 2, D-06120 Halle, Germany
| | - Tobias Rüffer
- Institute
of Chemistry, Chemnitz University of Technology, Straße der Nationen 62, D-09111 Chemnitz, Germany
| | - Clemens Bruhn
- Institute
of Chemistry, University of Kassel, Heinrich-Plett-Straße 40, D-34132 Kassel, Germany
| | - Christoph Wagner
- Institute
of Chemistry, Martin Luther University Halle-Wittenberg, Kurt-Mothes-Straße 2, D-06120 Halle, Germany
| | - Dieter Ströhl
- Institute
of Chemistry, Martin Luther University Halle-Wittenberg, Kurt-Mothes-Straße 2, D-06120 Halle, Germany
| | - Jürgen Schmidt
- Department
of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle, Germany
| | - Dirk Steinborn
- Institute
of Chemistry, Martin Luther University Halle-Wittenberg, Kurt-Mothes-Straße 2, D-06120 Halle, Germany
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408
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Pieters G, Taglang C, Bonnefille E, Gutmann T, Puente C, Berthet JC, Dugave C, Chaudret B, Rousseau B. Regioselective and Stereospecific Deuteration of Bioactive Aza Compounds by the Use of Ruthenium Nanoparticles. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201307930] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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409
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Pieters G, Taglang C, Bonnefille E, Gutmann T, Puente C, Berthet JC, Dugave C, Chaudret B, Rousseau B. Regioselective and stereospecific deuteration of bioactive aza compounds by the use of ruthenium nanoparticles. Angew Chem Int Ed Engl 2013; 53:230-4. [PMID: 24254536 DOI: 10.1002/anie.201307930] [Citation(s) in RCA: 101] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2013] [Indexed: 11/07/2022]
Abstract
An efficient H/D exchange method allowing the deuteration of pyridines, quinolines, indoles, and alkyl amines with D2 in the presence of Ru@PVP nanoparticles is described. By a general and simple procedure involving mild reaction conditions and simple filtration to recover the labeled product, the isotopic labeling of 22 compounds proceeded in good yield with high chemo- and regioselectivity. The viability of this procedure was demonstrated by the labeling of eight biologically active compounds. Remarkably, enantiomeric purity was conserved in the labeled compounds, even though labeling took place in the vicinity of the stereogenic center. The level of isotopic enrichment observed is suitable for metabolomic studies in most cases. This approach is also perfectly adapted to tritium labeling because it uses a gas as an isotopic source. Besides these applications to molecules of biological interest, this study reveals a rich and underestimated chemistry on the surface of ruthenium nanoparticles.
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Affiliation(s)
- Grégory Pieters
- CEA Saclay, SCBM, iBiTec-S, Building 547, PC # 108, 91191 Gif sur Yvette (France)
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410
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Sajiki H. Development of deuterium labeling method based on the heterogeneous platinum group metal-catalyzed C-H activation. YAKUGAKU ZASSHI 2013; 133:1177-93. [PMID: 24189559 DOI: 10.1248/yakushi.13-00218] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Deuterium (D) labeled compounds are utilized in various scientific fields such as mechanistic elucidation of reactions, preparation of new functional materials, tracers for microanalysis, deuterium labeled heavy drugs and so on. Although the H-D exchange reaction is a straightforward method to produce deuterated organic compounds, many precedent methods require expensive deuterium gas and/or harsh reaction conditions. A part of our leading research agendas is intended to the development of novel and functional heterogeneous platinum-group catalysts and the reclamation of unknown functionalities of existing heterogeneous platinum-group catalysts. During the course of the study, benzylic positions of substrates were site-selectively deuterated under mild and palladium-on-carbon (Pd/C)-catalyzed hydrogenation conditions in heavy water (D2O). Heat conditions promoted the H-D exchange reactivity and facilitated the H-D exchange reaction at not only the benzylic sites but also inactive C-H bonds and heterocyclic nuclei. It is noteworthy that platinum-on-carbon (Pt/C) indicated a quite high affinity toward aromatic nuclei, and the H-D exchange reaction was strongly enhanced by the use of Pt/C as a catalyst under milder conditions. The mixed use of Pd/C and Pt/C was found to be more efficient in the H-D exchange reaction compared to the independent use of Pd/C or Pt/C. Furthermore, simple alkanes could also be efficiently deuterated under rhodium-on-carbon (Rh/C)-catalyzed conditions. The use of ruthenium-on-carbon (Ru/C) enabled the regiospecific and efficient deuterium incorporation at α-positions of alcohols and results were applied as a regio- and stereoselective multi-deuteration method of sugar derivatives.
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Affiliation(s)
- Hironao Sajiki
- Laboratory of Organic Chemistry, Gifu Pharmaceutical University
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411
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Lee SH, Gorelsky SI, Nikonov GI. Catalytic H/D Exchange of Unactivated Aliphatic C–H Bonds. Organometallics 2013. [DOI: 10.1021/om4009372] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Sun Hwa Lee
- Chemistry Department, Brock University, 500 Glenridge Avenue, St. Catharines, Ontario L2S 3A1, Canada
- Department of Chemistry,
Centre for Catalysis Research and Innovation, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
| | - Serge I. Gorelsky
- Chemistry Department, Brock University, 500 Glenridge Avenue, St. Catharines, Ontario L2S 3A1, Canada
- Department of Chemistry,
Centre for Catalysis Research and Innovation, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
| | - Georgii I. Nikonov
- Chemistry Department, Brock University, 500 Glenridge Avenue, St. Catharines, Ontario L2S 3A1, Canada
- Department of Chemistry,
Centre for Catalysis Research and Innovation, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
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412
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Alcaide B, Almendros P, Martínez del Campo T, Torres MR. Synthesis of Fused-β-Lactams through Selective Gold-Catalyzed Oxycyclization of Dioxolane-Tethered Enynes. J Org Chem 2013; 78:8956-65. [DOI: 10.1021/jo401390k] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Benito Alcaide
- Grupo
de Lactamas y Heterociclos Bioactivos, Departamento de Química
Orgánica I, Unidad Asociada al CSIC, Facultad de Química, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - Pedro Almendros
- Instituto
de Química Orgánica General, IQOG, CSIC, Juan de la Cierva
3, 28006 Madrid, Spain
| | - Teresa Martínez del Campo
- Grupo
de Lactamas y Heterociclos Bioactivos, Departamento de Química
Orgánica I, Unidad Asociada al CSIC, Facultad de Química, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - M. Rosario Torres
- CAI
Difracción de Rayos X, Facultad de Química, Universidad Complutense de Madrid, 28040 Madrid, Spain
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413
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Wood ME, Bissiriou S, Lowe C, Windeatt KM. Synthetic use of the primary kinetic isotope effect in hydrogen atom transfer 2: generation of captodatively stabilised radicals. Org Biomol Chem 2013; 11:2712-23. [PMID: 23479029 DOI: 10.1039/c3ob40275d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Using C-3 di-deuterated morpholin-2-ones bearing N-2-iodobenzyl and N-3-bromobut-3-enyl radical generating groups, only products derived from the more stabilised C-3, rather than the less stabilised C-5 translocated radicals, were formed after intramolecular 1,5-hydrogen atom transfer, suggesting that any kinetic isotope effect present was not sufficient to offset captodative stabilisation.
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Affiliation(s)
- Mark E Wood
- Biosciences, College of Life and Environmental Sciences, University of Exeter, Geoffrey Pope Building, Stocker Road, Exeter EX4 4QD, UK.
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414
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Poraj-Kobielska M, Atzrodt J, Holla W, Sandvoss M, Gröbe G, Scheibner K, Hofrichter M. Preparation of labeled human drug metabolites and drug-drug interaction-probes with fungal peroxygenases. J Labelled Comp Radiopharm 2013; 56:513-9. [PMID: 24285530 DOI: 10.1002/jlcr.3103] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2013] [Revised: 06/28/2013] [Accepted: 07/01/2013] [Indexed: 01/15/2023]
Abstract
Enzymatic conversion of a drug can be an efficient alternative for the preparation of a complex metabolite compared with a multi-step chemical synthesis approach. Limitations exist for chemical methods for direct oxygen incorporation into organic molecules often suffering from low yields and unspecific oxidation and also for alternative whole-cell biotransformation processes, which require specific fermentation know-how. Stable oxygen-transferring biocatalysts such as unspecific peroxygenases (UPOs) could be an alternative for the synthesis of human drug metabolites and related stable isotope-labeled analogues. This work shows that UPOs can be used in combination with hydrogen/deuterium exchange for an efficient one-step process for the preparation of 4'-OH-diclofenac-d6. The scope of the reaction was investigated by screening of different peroxygenase subtypes for the transformation of selected deuterium-labeled substrates such as phenacetin-d3 or lidocaine-d3. Experiments with diclofenac-d7 revealed that the deuterium-labeling does not affect the kinetic parameters. By using the latter substrate and H2 (18) O2 as cosubstrate, it was possible to prepare a doubly isotope-labeled metabolite (4'-(18) OH-diclofenac-d6). UPOs offer certain practical advantages compared with P450 enzyme systems in terms of stability and ease of handling. Given these advantages, future work will expand the existing 'monooxygenation toolbox' of different fungal peroxygenases that mimic P450 in vitro reactions.
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Affiliation(s)
- Marzena Poraj-Kobielska
- Department of Biological and Environmental Sciences, TU Dresden - International Institute Zittau, Markt 23, 02763, Zittau, Germany
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415
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Wagh SJ, Chowdhury R, Mukhopadhyay S, Ghosh SK. A facile synthesis of 5,5-dideutero-4-dimethyl(phenyl)silyl-6-undecyl-tetrahydropyran-2-one as a deuterium labeled synthon for (−)-tetrahydrolipstatin and (+)-δ-hexadecanolide. J Labelled Comp Radiopharm 2013; 56:649-54. [DOI: 10.1002/jlcr.3081] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2013] [Revised: 05/17/2013] [Accepted: 05/28/2013] [Indexed: 12/15/2022]
Affiliation(s)
- Sandip J. Wagh
- Bio-Organic Division; Bhabha Atomic Research Centre; Trombay Mumbai 400085 India
| | - Raghunath Chowdhury
- Bio-Organic Division; Bhabha Atomic Research Centre; Trombay Mumbai 400085 India
| | - Sulekha Mukhopadhyay
- Chemical Engineering Division; Bhabha Atomic Research Centre; Trombay Mumbai 400085 India
| | - Sunil K. Ghosh
- Bio-Organic Division; Bhabha Atomic Research Centre; Trombay Mumbai 400085 India
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416
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Atzrodt J, Derdau V. Selected scientific topics of the 11th International Isotope Symposium on the Synthesis and Applications of Isotopes and Isotopically Labeled Compounds. J Labelled Comp Radiopharm 2013; 56:408-16. [PMID: 24285513 DOI: 10.1002/jlcr.3096] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2013] [Revised: 06/19/2013] [Accepted: 06/19/2013] [Indexed: 01/02/2023]
Abstract
This micro-review describes hot topics and new trends in isotope science discussed at the 11th International Isotope Symposium on the Synthesis and Applications of Isotopes and Isotopically Labeled Compounds from a personal perspective.
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Affiliation(s)
- Jens Atzrodt
- Isotope Chemistry & Metabolite Synthesis, DSAR-DD, Sanofi-Aventis Deutschland GmbH, Industriepark Höchst G876, 65926, Frankfurt am Main, Germany
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417
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Tsukada N, Abe T, Inoue Y. Formation ofcine-Substitution Products in theSuzukiMiyauraCross-Coupling Reaction Catalyzed by Dinuclear Palladium Complexes. Helv Chim Acta 2013. [DOI: 10.1002/hlca.201200454] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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418
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Sawama Y, Yamada T, Yabe Y, Morita K, Shibata K, Shigetsura M, Monguchi Y, Sajiki H. Platinum on Carbon-Catalyzed H-D Exchange Reaction of Aromatic Nuclei due to Isopropyl Alcohol-Mediated Self- Activation of Platinum Metal in Deuterium Oxide. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201201102] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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419
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Yepuri NR, Jamieson SA, Darwish TA, Rawal A, Hook JM, Thordarson P, Holden PJ, James M. Synthesis of per-deuterated alkyl amines for the preparation of deuterated organic pyromellitamide gelators. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.03.031] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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420
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Duttwyler S, Butterfield AM, Siegel JS. Arenium acid catalyzed deuteration of aromatic hydrocarbons. J Org Chem 2013; 78:2134-8. [PMID: 23163918 DOI: 10.1021/jo302201a] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The arenium acid [mesitylene-H](+) has been shown to be an extraordinarily active H/D exchange catalyst for the perdeuteration of polycyclic aromatic hydrocarbons. The reactions take place under ambient conditions in C6D6 as an inexpensive deuterium source. High isolated yields and excellent degrees of deuterium incorporation were achieved using the substrates p-terphenyl, fluoranthene, pyrene, triphenylene, and corannulene.
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Affiliation(s)
- Simon Duttwyler
- Department of Chemistry, Yale University, 350 Edwards Street, New Haven, Connecticut 06520, United States
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421
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Khaskin E, Milstein D. Simple and Efficient Catalytic Reaction for the Selective Deuteration of Alcohols. ACS Catal 2013. [DOI: 10.1021/cs400092p] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Eugene Khaskin
- Department of Organic Chemistry, Weizmann Institute of Science, Rehovot, Israel
| | - David Milstein
- Department of Organic Chemistry, Weizmann Institute of Science, Rehovot, Israel
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422
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Alcaide B, Almendros P, Quirós MT, López R, Menéndez MI, Sochacka-Ćwikła A. Unveiling the Reactivity of Propargylic Hydroperoxides under Gold Catalysis. J Am Chem Soc 2012; 135:898-905. [DOI: 10.1021/ja3108966] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Benito Alcaide
- Grupo de Lactamas y Heterociclos Bioactivos, Departamento de Química
Orgánica I, Unidad Asociada al CSIC, Facultad de Química, Universidad Complutense de Madrid, 28040-Madrid, Spain
| | - Pedro Almendros
- Instituto de Química Orgánica General, IQOG, CSIC, Juan de la Cierva
3, 28006-Madrid, Spain
| | - M. Teresa Quirós
- Grupo de Lactamas y Heterociclos Bioactivos, Departamento de Química
Orgánica I, Unidad Asociada al CSIC, Facultad de Química, Universidad Complutense de Madrid, 28040-Madrid, Spain
| | - Ramón López
- Departamento
de Química Física y Analítica, Universidad de Oviedo, Julián Clavería 8, 33006 Oviedo,
Asturias, Spain
| | - María I. Menéndez
- Departamento
de Química Física y Analítica, Universidad de Oviedo, Julián Clavería 8, 33006 Oviedo,
Asturias, Spain
| | - Aleksandra Sochacka-Ćwikła
- Grupo de Lactamas y Heterociclos Bioactivos, Departamento de Química
Orgánica I, Unidad Asociada al CSIC, Facultad de Química, Universidad Complutense de Madrid, 28040-Madrid, Spain
- Instituto de Química Orgánica General, IQOG, CSIC, Juan de la Cierva
3, 28006-Madrid, Spain
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423
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Grellier M, Mason SA, Albinati A, Capelli SC, Rizzato S, Bijani C, Coppel Y, Sabo-Etienne S. Probing Highly Selective H/D Exchange Processes with a Ruthenium Complex through Neutron Diffraction and Multinuclear NMR Studies. Inorg Chem 2012; 52:7329-37. [DOI: 10.1021/ic302307m] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Mary Grellier
- CNRS, LCC (Laboratoire de Chimie de Coordination),
205 route de Narbonne, BP 44099, F-31077 Toulouse Cedex 4, France
- Université de Toulouse, UPS, INPT, F-31077 Toulouse Cedex 4, France
| | - Sax A. Mason
- Institut Laue-Langevin, 6 rue Jules Horowitz, BP 156, 38042 Grenoble Cedex 9, France
| | - Alberto Albinati
- Dipartimento di Chimica, Università di Milano, Via C. Golgi, 19, 20133
Milan, Italy
| | - Silvia C. Capelli
- Institut Laue-Langevin, 6 rue Jules Horowitz, BP 156, 38042 Grenoble Cedex 9, France
| | - Silvia Rizzato
- Dipartimento di Chimica, Università di Milano, Via C. Golgi, 19, 20133
Milan, Italy
| | - Christian Bijani
- CNRS, LCC (Laboratoire de Chimie de Coordination),
205 route de Narbonne, BP 44099, F-31077 Toulouse Cedex 4, France
- Université de Toulouse, UPS, INPT, F-31077 Toulouse Cedex 4, France
| | - Yannick Coppel
- CNRS, LCC (Laboratoire de Chimie de Coordination),
205 route de Narbonne, BP 44099, F-31077 Toulouse Cedex 4, France
- Université de Toulouse, UPS, INPT, F-31077 Toulouse Cedex 4, France
| | - Sylviane Sabo-Etienne
- CNRS, LCC (Laboratoire de Chimie de Coordination),
205 route de Narbonne, BP 44099, F-31077 Toulouse Cedex 4, France
- Université de Toulouse, UPS, INPT, F-31077 Toulouse Cedex 4, France
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424
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Yabe Y, Sawama Y, Monguchi Y, Sajiki H. Site-Selective Deuterated-Alkene Synthesis with Palladium on Boron Nitride. Chemistry 2012; 19:484-8. [DOI: 10.1002/chem.201203337] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2012] [Indexed: 11/09/2022]
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425
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Sawama Y, Yabe Y, Iwata H, Fujiwara Y, Monguchi Y, Sajiki H. Stereo- and Regioselective Direct Multi-Deuterium-Labeling Methods for Sugars. Chemistry 2012; 18:16436-42. [DOI: 10.1002/chem.201202852] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2012] [Indexed: 11/08/2022]
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426
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Chow C, Patrick BO, Legzdins P. Thermal Chemistry of a Tungsten Trimethylsilylallyl Complex in Benzene and Fluorobenzenes. Organometallics 2012. [DOI: 10.1021/om300765e] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Catherine Chow
- Department of Chemistry, The University of British Columbia,
Vancouver, British Columbia, Canada V6T 1Z1
| | - Brian O. Patrick
- Department of Chemistry, The University of British Columbia,
Vancouver, British Columbia, Canada V6T 1Z1
| | - Peter Legzdins
- Department of Chemistry, The University of British Columbia,
Vancouver, British Columbia, Canada V6T 1Z1
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427
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Habersberger BM, Lodge TP, Bates FS. Solvent Selective Hydrogen–Deuterium Exchange on Saturated Polyolefins. Macromolecules 2012. [DOI: 10.1021/ma301814n] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Brian M. Habersberger
- Department
of Chemical Engineering and
Materials Science and ‡Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455,
United States
| | - Timothy P. Lodge
- Department
of Chemical Engineering and
Materials Science and ‡Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455,
United States
| | - Frank S. Bates
- Department
of Chemical Engineering and
Materials Science and ‡Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455,
United States
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428
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Neubert L, Michalik D, Bähn S, Imm S, Neumann H, Atzrodt J, Derdau V, Holla W, Beller M. Ruthenium-catalyzed selective α,β-deuteration of bioactive amines. J Am Chem Soc 2012; 134:12239-44. [PMID: 22702889 DOI: 10.1021/ja3041338] [Citation(s) in RCA: 134] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A novel and convenient protocol for the catalytic hydrogen-deuterium exchange of biologically active tertiary amines utilizing the borrowing hydrogen methodology has been developed. In the presence of the readily available Shvo catalyst, excellent chemoselectivity toward α- and β-protons with respect to the nitrogen atom as well as high degree of deuterium incorporation and functional group tolerance is achieved. This allowed for the deuteration of complex pharmaceutically interesting substrates, including examples for actual marketed drug compounds. Notably, this method constitutes a powerful tool for the generation of valuable internal standard materials for LC-MS/MS analyses highly demanded for various life-science applications.
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Affiliation(s)
- Lorenz Neubert
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Strasse 29a, D-18059 Rostock, Germany
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429
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Sakamoto T, Mori K, Akiyama T. Chiral Phosphoric Acid Catalyzed Enantioselective Transfer Deuteration of Ketimines by Use of Benzothiazoline As a Deuterium Donor: Synthesis of Optically Active Deuterated Amines. Org Lett 2012; 14:3312-5. [DOI: 10.1021/ol3012869] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tsubasa Sakamoto
- Department of Chemistry, Faculty of Science, Gakushuin University, 1-5-1 Mejiro, Toshima-ku, Tokyo 171-8588, Japan
| | - Keiji Mori
- Department of Chemistry, Faculty of Science, Gakushuin University, 1-5-1 Mejiro, Toshima-ku, Tokyo 171-8588, Japan
| | - Takahiko Akiyama
- Department of Chemistry, Faculty of Science, Gakushuin University, 1-5-1 Mejiro, Toshima-ku, Tokyo 171-8588, Japan
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430
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Wang WH, Hull JF, Muckerman JT, Fujita E, Hirose T, Himeda Y. Highly Efficient D2 Generation by Dehydrogenation of Formic Acid in D2O through H+/D+ Exchange on an Iridium Catalyst: Application to the Synthesis of Deuterated Compounds by Transfer Deuterogenation. Chemistry 2012; 18:9397-404. [DOI: 10.1002/chem.201200576] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2012] [Indexed: 11/05/2022]
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431
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Riemer T, Nimptsch A, Nimptsch K, Schiller J. Determination of the glycosaminoglycan and collagen contents in tissue samples by high-resolution 1H NMR spectroscopy after DCl-induced hydrolysis. Biomacromolecules 2012; 13:2110-7. [PMID: 22713080 DOI: 10.1021/bm300485j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The determination of the collagen and glycosaminoglycan (GAG) contents of native and particularly bioengineered tissues is of considerable interest because the collagen-to-GAG ratio determines the water content of the tissue, which is crucial regarding its mechanical properties. (1)H NMR spectroscopy subsequent to the hydrolysis of the sample by aqueous 6 M DCl at 353 K is used to determine the GAG and collagen contents simultaneously. Under these strongly acidic conditions the biopolymers of the extracellular matrix, collagen, and GAG are fragmented into their individual monomers, that is, free amino acids from collagen and monosaccharides from the polymer repeat units of GAGs. The amino acid amount can be easily determined in the presence of an internal standard by (1)H NMR spectroscopy because amino acids proved to be stable under acidic conditions. The carbohydrates are subject to charring in the presence of concentrated DCl, but glucosamine and galactosamine were found to be sufficiently stable for quantification under the chosen conditions.
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Affiliation(s)
- Thomas Riemer
- University of Leipzig , Faculty of Medicine, Institute of Medical Physics and Biophysics, Leipzig, Germany.
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432
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Rudowska M, Wojewska D, Kluczyk A, Bąchor R, Stefanowicz P, Szewczuk Z. The hydrogen-deuterium exchange at α-carbon atom in N,N,N-trialkylglycine residue: ESI-MS studies. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2012; 23:1024-1028. [PMID: 22403022 PMCID: PMC3345113 DOI: 10.1007/s13361-012-0359-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/13/2012] [Revised: 02/01/2012] [Accepted: 02/05/2012] [Indexed: 05/31/2023]
Abstract
Derivatization of peptides as quaternary ammonium salts (QAS) is a known method for sensitive detection by electrospray ionization tandem mass spectrometry. Hydrogens at α-carbon atom in N,N,N-trialkylglycine residue can be easily exchanged by deuterons. The exchange reaction is base-catalyzed and is dramatically slow at lower pH. Introduced deuterons are stable in acidic aqueous solution and are not back-exchanged during LC-MS analysis. Increased ionization efficiency, provided by the fixed positive charge on QAS group, as well as the deuterium labeling, enables the analysis of trace amounts of peptides.
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Affiliation(s)
| | | | - Alicja Kluczyk
- Faculty of Chemistry, University of Wrocław, Wrocław, Poland
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433
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Gröll B, Schnürch M, Mihovilovic MD. Selective Ru(0)-Catalyzed Deuteration of Electron-Rich and Electron-Poor Nitrogen-Containing Heterocycles. J Org Chem 2012; 77:4432-7. [DOI: 10.1021/jo300219v] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Birgit Gröll
- Institute of Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9, 1060
Vienna, Austria
| | - Michael Schnürch
- Institute of Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9, 1060
Vienna, Austria
| | - Marko D. Mihovilovic
- Institute of Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9, 1060
Vienna, Austria
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434
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Grainger R, Nikmal A, Cornella J, Larrosa I. Selective deuteration of (hetero)aromatic compounds via deutero-decarboxylation of carboxylic acids. Org Biomol Chem 2012; 10:3172-4. [PMID: 22418863 DOI: 10.1039/c2ob25157d] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A practical, mild and highly selective protocol for the monodeuteration of a variety of arenes and heteroarenes is presented. Catalytic amounts of Ag(I) salts in DMSO/D(2)O are shown to facilitate the deutero-decarboxylation of ortho-substituted benzoic and heteroaromatic α-carboxylic acids in high yields with excellent levels of deuterium incorporation.
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Affiliation(s)
- Rachel Grainger
- School of Biological and Chemical Sciences, Queen Mary University of London, Joseph Priestley Building, Mile End Road, E1 4NS, London, UK
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435
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Zhou L, Bian X, Yang S, Mu B. A two-step synthesis of deuterium labeled 8, 8, 9, 9-d4-hexadecane from nonanoic acid. J Labelled Comp Radiopharm 2012. [DOI: 10.1002/jlcr.1962] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Lei Zhou
- State Key Laboratory of Bioreactor Engineering and Institute of Applied Chemistry; East China University of Science and Technology; Shanghai; 200237; China
| | - Xinyu Bian
- State Key Laboratory of Bioreactor Engineering and Institute of Applied Chemistry; East China University of Science and Technology; Shanghai; 200237; China
| | - Shizhong Yang
- State Key Laboratory of Bioreactor Engineering and Institute of Applied Chemistry; East China University of Science and Technology; Shanghai; 200237; China
| | - Bozhong Mu
- State Key Laboratory of Bioreactor Engineering and Institute of Applied Chemistry; East China University of Science and Technology; Shanghai; 200237; China
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436
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Deuteration of molecules for neutron reflectometry on organic light-emitting diode thin films. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2011.12.032] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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437
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Gowrisankar S, Neumann H, Beller M. A Convenient and Practical Synthesis of Anisoles and Deuterated Anisoles by Palladium-Catalyzed Coupling Reactions of Aryl Bromides and Chlorides. Chemistry 2012; 18:2498-502. [DOI: 10.1002/chem.201103347] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2011] [Indexed: 11/12/2022]
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438
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Jian Z, Ray T, Wu A, Jones L. Proton exchange reactions in isotope chemistry (I). J Labelled Comp Radiopharm 2012. [DOI: 10.1002/jlcr.1959] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Zhigang Jian
- Novartis Pharmaceuticals Corporation; NIBR-DMPK-DMBA-IL; East Hanover; NJ; 07936; USA
| | - Tapan Ray
- Novartis Pharmaceuticals Corporation; NIBR-DMPK-DMBA-IL; East Hanover; NJ; 07936; USA
| | - Amy Wu
- Novartis Pharmaceuticals Corporation; NIBR-DMPK-DMBA-IL; East Hanover; NJ; 07936; USA
| | - Lawrence Jones
- Novartis Pharmaceuticals Corporation; NIBR-DMPK-DMBA-IL; East Hanover; NJ; 07936; USA
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439
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Miyazawa A, Shimodaira H, Kawanishi Y. Microwave-Assisted Direct H/D Exchange Reactions of Dimetridazole and Metronidazole in Alkaline D2O. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2011. [DOI: 10.1246/bcsj.20110095] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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440
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Catalytic CH Bond Activation at Nanoscale Lewis Acidic Aluminium Fluorides: H/D Exchange Reactions at Aromatic and Aliphatic Hydrocarbons. Chemistry 2011; 17:14385-8. [DOI: 10.1002/chem.201102853] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2011] [Indexed: 11/07/2022]
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441
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Campos J, Rubio M, Esqueda AC, Carmona E. Large-scale preparation and labelling reactions of deuterated silanes. J Labelled Comp Radiopharm 2011. [DOI: 10.1002/jlcr.1950] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Jesús Campos
- Departamento de Química Inorgánica, Instituto de Investigaciones Químicas (IIQ); Universidad de Sevilla, Consejo Superior de Investigaciones Científicas; Avda. Américo Vespucio 49; 41092; Sevilla; Spain
| | - Miguel Rubio
- Departamento de Química Inorgánica, Instituto de Investigaciones Químicas (IIQ); Universidad de Sevilla, Consejo Superior de Investigaciones Científicas; Avda. Américo Vespucio 49; 41092; Sevilla; Spain
| | - Ana C. Esqueda
- Departamento de Química Inorgánica, Instituto de Investigaciones Químicas (IIQ); Universidad de Sevilla, Consejo Superior de Investigaciones Científicas; Avda. Américo Vespucio 49; 41092; Sevilla; Spain
| | - Ernesto Carmona
- Departamento de Química Inorgánica, Instituto de Investigaciones Químicas (IIQ); Universidad de Sevilla, Consejo Superior de Investigaciones Científicas; Avda. Américo Vespucio 49; 41092; Sevilla; Spain
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442
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Tse SKS, Xue P, Lau CWS, Sung HHY, Williams ID, Jia G. Ruthenium-Catalyzed Regioselective Deuteration of Alcohols at the β-Carbon Position with Deuterium Oxide. Chemistry 2011; 17:13918-25. [DOI: 10.1002/chem.201101542] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2011] [Indexed: 11/05/2022]
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443
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Izumi A, Nakao T, Shibayama M. Synthesis and properties of a deuterated phenolic resin. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/pola.24948] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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444
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Rubio M, Campos J, Carmona E. Rhodium-Catalyzed, Efficient Deutero- and Tritiosilylation of Carbonyl Compounds from Hydrosilanes and Deuterium or Tritium. Org Lett 2011; 13:5236-9. [DOI: 10.1021/ol202117t] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Miguel Rubio
- Departamento de Química Inorgánica-Instituto de Investigaciones Químicas, Universidad de Sevilla-Consejo Superior de Investigaciones Científicas, Avda. Américo Vespucio 49, 41092 Sevilla, Spain
| | - Jesús Campos
- Departamento de Química Inorgánica-Instituto de Investigaciones Químicas, Universidad de Sevilla-Consejo Superior de Investigaciones Científicas, Avda. Américo Vespucio 49, 41092 Sevilla, Spain
| | - Ernesto Carmona
- Departamento de Química Inorgánica-Instituto de Investigaciones Químicas, Universidad de Sevilla-Consejo Superior de Investigaciones Científicas, Avda. Américo Vespucio 49, 41092 Sevilla, Spain
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445
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Li N, Zeng S, He L, Zhong W. Exploration of possible binding sites of nanoparticles on protein by cross-linking chemistry coupled with mass spectrometry. Anal Chem 2011; 83:6929-34. [PMID: 21870789 DOI: 10.1021/ac201889j] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
For the first time, the possible binding site of nanoparticles on protein was revealed by cross-linking chemistry coupled with mass spectrometry. The peptides located very close to the poly(acrylic acid) (PAA)-coated Fe(3)O(4) nanoparticles (NPs) during interaction with human serum albumin (HSA) were cross-linked to the surface of NPs. Following protease digestion, the attached peptides were cleaved off the particle surface and identified by matrix-assisted laser desorption/ionization-time-of-flight-mass spectrometry (MALDI-TOF-MS). The peptides were found to be part of the so-called drug binding site 2 of HSA; and the competitive binding to HSA between the corresponding drug, ibuprofen, and the NPs was observed. Our results demonstrated that cross-linking chemistry coupled with MS was a quick and simple method for locating the possible binding sites of NPs on protein. Information on NP-protein binding interface will benefit the study of how the interactions are governed by the physicochemical properties of NPs, for guiding the design of functional bionano constructs. It can also help to predict the biological consequence of protein adsorption on NPs, for obtaining more knowledge on nanotoxicity.
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446
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Miyake H, Kano N, Kawashima T. Isolation of a Metastable Geometrical Isomer of a Hexacoordinated Dihydrophosphate: Elucidation of Its Enhanced Reactivity in Umpolung of a Hydrogen Atom of Water. Inorg Chem 2011; 50:9083-9. [DOI: 10.1021/ic2012765] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hideaki Miyake
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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447
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Oxoisoaporphines: Regioselective deuterium labelling involving the metastable hydrogenated photoproduct anions. J Photochem Photobiol A Chem 2011. [DOI: 10.1016/j.jphotochem.2011.07.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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448
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Bossi G, Putignano E, Rigo P, Baratta W. Pincer Ru and Os complexes as efficient catalysts for racemization and deuteration of alcohols. Dalton Trans 2011; 40:8986-95. [PMID: 21691649 DOI: 10.1039/c1dt10498e] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The pincer complexes [MX(CNN)(PP)] (M = Ru, Os; X = Cl, OTf; HCNN = 1-(6-arylpyridin-2-yl)methanamine; PP = diphosphine) have proven to efficiently catalyze both racemization and deuteration of alcohols in the presence of a base. Chiral alcohols have been racemized at 30-50 °C using 1 mol% of Ru or Os pincer complexes and 5 mol% of KOtBu in 2-propanol. Primary and secondary alcohols are efficiently deuterated at the α position, with respect to the OH group, using 2-propanol-d(8) as solvent with Ru or Os pincer complexes and KOtBu at 30-50 °C. For secondary alcohols incorporation of deuterium at the β position has also been observed. In 2-propanol-d(8) the pincer complexes catalyze the simultaneous deuteration and racemization of (S)-1-phenylethanol, the two processes being strictly correlated. For both reactions much the same activity has been observed with the Ru and Os complexes. The pincer complexes display a superior activity with respect to the related compounds [MCl(2)(NN)(PP)] (NN = bidentate amine or pyridine ligand). The synthesis of the new complexes [MCl(CNN)(PP)] (M = Ru, 2, 4 and Os, 6, 7; PP = dppb, dppf) and [Ru(OTf)(CNN)(dppb)] (3) is also reported.
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Affiliation(s)
- Gianluca Bossi
- Dipartimento di Chimica, Fisica e Ambiente, Università di Udine, Via Cotonificio 108, I-33100, Udine, Italy
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449
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Young KJ, Lokare KS, Leung CH, Cheng MJ, Nielsen RJ, Petasis NA, Goddard WA, Periana RA. Synthesis of osmium and ruthenium complexes bearing dimethyl (S,S)-2,2′-(pyridine-2,6-diyl)-bis-(4,5-dihydrooxazol-4-carboxylate) ligand and application to catalytic H/D exchange. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.molcata.2011.01.029] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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450
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Di Giuseppe A, Castarlenas R, Pérez-Torrente JJ, Lahoz FJ, Polo V, Oro LA. Mild and Selective H/D Exchange at the β Position of Aromatic α-Olefins by N-Heterocyclic Carbene-Hydride-Rhodium Catalysts. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201007238] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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