1
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Ogasahara R, Ban K, Mae M, Akai S, Sawama Y. Deuterated Alkyl Sulfonium Salt Reagents; Importance of H/D Exchange Methods in Drug Discovery. ChemMedChem 2024; 19:e202400201. [PMID: 38740557 DOI: 10.1002/cmdc.202400201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Revised: 05/11/2024] [Accepted: 05/13/2024] [Indexed: 05/16/2024]
Abstract
Deuterated drugs (heavy drugs) have recently been spotlighted as a new modality for small-molecule drugs because the pharmacokinetics of pharmaceutical drugs can be enhanced by replacing C-H bonds with more stable C-D bonds at metabolic positions. Therefore, deuteration methods for drug candidates are a hot topic in medicinal chemistry. Among them, the H/D exchange reaction (direct transformation of C-H bonds to C-D bonds) is a useful and straightforward method for creating novel deuterated target molecules, and over 20 reviews on the synthetic methods related to H/D exchange reactions have been published in recent years. Although various deuterated drug candidates undergo clinical trials, approved deuterated drugs possess CD3 groups in the same molecule. However, less diversification, except for the CD3 group, is a problem for future medicinal chemistry. Recently, we developed various deuterated alkyl (dn-alkyl) sulfonium salts based on the H/D exchange reaction of the corresponding hydrogen form using D2O as an inexpensive deuterium source to introduce CD3, CH3CD2, and ArCH2CD2 groups into drug candidates. This concept summarises recent reviews related to H/D exchange reactions and novel reagents that introduce the CD3 group, and our newly developed electrophilic dn-alkyl reagents are discussed.
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Affiliation(s)
- Riku Ogasahara
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Kazuho Ban
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Miyu Mae
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Shuji Akai
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Yoshinari Sawama
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamada-oka, Suita, Osaka, 565-0871, Japan
- Deuterium Science Research Unit, Center for the Promotion of Interdisciplinary Education and Research, Kyoto University, Yoshida, Sakyo-ku, Kyoto, 606-8501, Japan
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2
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Kriegelstein M, Hojcsková J, Hroch M, Marek A. Direct Multi-Deuterium Labelling of Pirtobrutinib. J Labelled Comp Radiopharm 2024; 67:314-323. [PMID: 39004786 DOI: 10.1002/jlcr.4117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2024] [Revised: 06/03/2024] [Accepted: 06/29/2024] [Indexed: 07/16/2024]
Abstract
Herein, we demonstrate an efficient method for multi-deuterium labelling of pirtobrutinib-a Bruton's tyrosine kinase inhibitor recently approved by the FDA-using a straightforward hydrogen isotope exchange (HIE) reaction. A remarkably high level of deuterium incorporation was achieved using an excess of a Kerr-type iridium catalyst. The key factor in the significant deuterium labelling was the decision to employ a deuterium uniformly labelled solvent, chlorobenzene-d5, at an elevated temperature. Virtually, no d0-d3 species were detected, with only traces of d4-d5 isotopomers (< 5%) observable in the mass spectrum of pirtobrutinib-d8, fulfilling requirements for stable isotope-labelled internal standard. The labelled compound-mainly consisting of isotopomers d6-d9 at 82.4% of the total abundance-was isolated in a high yield (73%) and purity (99%). Noteworthy, fluorine group acting as a directing group was observed for the first time. Significant incorporation of deuterium in ortho-positions, exceeding 87%, was observed. Interestingly, chlorinated solvent used in the HIE reactions was non-specifically deuterated yielding up to 0.42 deuterium per chlorobenzene molecule even at an exceptionally low iridium catalyst loading of 4.17 × 10-2 mol%.
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Affiliation(s)
- Michal Kriegelstein
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Prague, Czech Republic
| | - Jana Hojcsková
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Prague, Czech Republic
| | - Miloš Hroch
- Department of Medical Biochemistry, Faculty of Medicine in Hradec Králové, Charles University, Hradec Králové, Czech Republic
| | - Aleš Marek
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Prague, Czech Republic
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3
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Nguyen HMH, Thomas DC, Hart MA, Steenback KR, Levy JN, McNally A. Synthesis of 15N-Pyridines and Higher Mass Isotopologs via Zincke Imine Intermediates. J Am Chem Soc 2024; 146:2944-2949. [PMID: 38227776 PMCID: PMC11446173 DOI: 10.1021/jacs.3c12445] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2024]
Abstract
Methods to incorporate stable radioisotopes are integral to pharmaceutical and agrochemical development. However, despite the prevalence of pyridines in candidate compounds, methods to incorporate 15N atoms within their structures are limited. Here, we present a general approach to pyridine 15N-labeling that proceeds via ring-opening to NTf-Zincke imines and then ring-closure with commercially available 15NH4Cl salts. This process functions on a range of substituted pyridines, from simple building block-type compounds to late-stage labeling of complex pharmaceuticals, and 15N-incorporation is >95% in most cases. The reactivity of the Zincke imine intermediates also enables deuteration of the pyridine C3- and C5-positions, resulting in higher mass isotopologs required for LCMS analysis of biological fluids during drug development.
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Affiliation(s)
- Hillary M H Nguyen
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - David C Thomas
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Marie A Hart
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Kaila R Steenback
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Jeffrey N Levy
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Andrew McNally
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
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4
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Wood D, Lin S. Deuterodehalogenation Under Net Reductive or Redox-Neutral Conditions Enabled by Paired Electrolysis. Angew Chem Int Ed Engl 2023; 62:e202218858. [PMID: 36738472 PMCID: PMC10050105 DOI: 10.1002/anie.202218858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 02/01/2023] [Accepted: 02/02/2023] [Indexed: 02/06/2023]
Abstract
Interest in deuterated active pharmaceutical ingredients (APIs) is increasing as deuteration holds promise for kinetic isotope effect (KIE) regulated fine-tuning of API performance. Moreover, deuterium isotope labeling is frequently carried out to study organic and bioorganic reaction mechanisms and to facilitate complex target synthesis. As such, methods for highly selective deuteration of organic molecules are highly desirable. Herein, we present an electrochemical method for the selective deuterodehalogenation of benzylic halides via a radical-polar crossover mechanism, using inexpensive deuterium oxide (D2 O) as the deuterium source. We demonstrate broad functional group compatibility across a range of aryl and heteroaryl benzylic halides. Furthermore, we uncover a sequential paired electrolysis regime, which permits switching between net reductive and overall redox-neutral reactions of sulfur-containing substrates simply by changing the identity of the sacrificial reductant employed.
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Affiliation(s)
- Devin Wood
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY-14853, USA
| | - Song Lin
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY-14853, USA
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5
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Du HZ, Fan JZ, Wang ZZ, Strotman NA, Yang H, Guan BT. Cesium Amide-Catalyzed Selective Deuteration of Benzylic C-H Bonds with D 2 and Application for Tritiation of Pharmaceuticals. Angew Chem Int Ed Engl 2023; 62:e202214461. [PMID: 36289047 DOI: 10.1002/anie.202214461] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Indexed: 11/05/2022]
Abstract
Hydrogen isotope exchange (HIE) represents one of the most attractive labeling methods to synthesize deuterium- and tritium-labeled compounds. Catalytic HIE methods that enable site-selective C-H bond activation and exchange labeling with gaseous isotopes D2 and T2 are of vital importance, in particular for high-specific-activity tritiation of pharmaceuticals. As part of our interest in exploring s-block metals for catalytic transformations, we found CsN(SiMe3 )2 to be an efficient catalyst for selective HIE of benzylic C-H bonds with D2 gas. The reaction proceeds through a kinetic deprotonative equilibrium that establishes an exchange pathway between C-H bonds and D2 gas. By virtue of multiple C-H bonds activation and high activity (isotope enrichment up to 99 %), the simple cesium amide catalyst provided a very powerful and practically convenient labeling protocol for synthesis of highly deuterated compounds and high-specific-activity tritiation of pharmaceuticals.
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Affiliation(s)
- Hui-Zhen Du
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, China
| | - Jun-Zhen Fan
- Department of Chemistry, Fudan University, Shanghai, 200438, China
| | - Zhong-Zhen Wang
- Department of Chemistry, Fudan University, Shanghai, 200438, China
| | - Neil A Strotman
- Process Research & Development, Merck & Co., Inc., Rahway, New Jersey 07065, USA
| | - Haifeng Yang
- Process Research & Development, Merck & Co., Inc., Rahway, New Jersey 07065, USA
| | - Bing-Tao Guan
- Department of Chemistry, Fudan University, Shanghai, 200438, China
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6
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Derdau V, Sandvoss M. Synthesis and analysis of isotopically stable labeled nitrosamines as mass spectrometry standards for drug impurity quality control. J Labelled Comp Radiopharm 2023; 66:41-46. [PMID: 36582077 DOI: 10.1002/jlcr.4010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 12/15/2022] [Accepted: 12/23/2022] [Indexed: 12/31/2022]
Abstract
We describe a simple and easy pathway to synthesize nitrosamine mass spectrometry standards in good to moderate yields. N-alkylation of Boc-protected primary or secondary amines using stable isotope labeled alkyl halides yielded the key intermediates that were deprotected, and then, the nitrosamine was formed with sodium nitrite and sodium hydrogensulfate. Special attention to safety, disposal of waste, and surface cleaning was carried throughout.
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Affiliation(s)
- Volker Derdau
- Sanofi Germany, R&D, Integrated Drug Discovery, Isotope Chemistry, Industriepark Höchst, Frankfurt am Main, Germany
| | - Martin Sandvoss
- Sanofi Germany, R&D, Integrated Drug Discovery, Isotope Chemistry, Industriepark Höchst, Frankfurt am Main, Germany
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7
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Barranco S, Pérez-Temprano MH. Merging homogeneous transition metal catalysis and hydrogen isotope exchange. ADVANCES IN ORGANOMETALLIC CHEMISTRY 2023. [DOI: 10.1016/bs.adomc.2022.12.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
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8
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Ruck RT, Strotman NA, Krska SW. The Catalysis Laboratory at Merck: 20 Years of Catalyzing Innovation. ACS Catal 2022. [DOI: 10.1021/acscatal.2c05159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Rebecca T. Ruck
- Department of Process Research & Development, Merck & Co., Inc., Rahway, New Jersey07065, United States
| | - Neil A. Strotman
- Department of Pharmaceutical Sciences & Clinical Supplies, Merck & Co., Inc., Rahway, New Jersey07065, United States
| | - Shane W. Krska
- Chemistry Capabilities Accelerating Therapeutics, Merck & Co., Inc., Kenilworth, New Jersey07033, United States
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9
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Appert E, Martin‐Mingot A, Karam O, Zunino F, Michelet B, Bouazza F, Thibaudeau S. Superacid‐Mediated Late‐Stage Aromatic Polydeuteration of Pharmaceuticals. Chemistry 2022; 28:e202201583. [DOI: 10.1002/chem.202201583] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2022] [Indexed: 12/15/2022]
Affiliation(s)
- Emeline Appert
- Superacid Group – Organic Synthesis Team IC2MP Université de Poitiers, UMR-CNRS 7285 4 rue Michel Brunet, TSA 51106 86073 Poitiers Cedex 9 France
- @rtMolecule 1 rue Georges Bonnet, Bâtiment B37 86000 Poitiers France
| | - Agnès Martin‐Mingot
- Superacid Group – Organic Synthesis Team IC2MP Université de Poitiers, UMR-CNRS 7285 4 rue Michel Brunet, TSA 51106 86073 Poitiers Cedex 9 France
| | - Omar Karam
- @rtMolecule 1 rue Georges Bonnet, Bâtiment B37 86000 Poitiers France
| | - Fabien Zunino
- @rtMolecule 1 rue Georges Bonnet, Bâtiment B37 86000 Poitiers France
| | - Bastien Michelet
- Superacid Group – Organic Synthesis Team IC2MP Université de Poitiers, UMR-CNRS 7285 4 rue Michel Brunet, TSA 51106 86073 Poitiers Cedex 9 France
| | - Fodil Bouazza
- @rtMolecule 1 rue Georges Bonnet, Bâtiment B37 86000 Poitiers France
| | - Sébastien Thibaudeau
- Superacid Group – Organic Synthesis Team IC2MP Université de Poitiers, UMR-CNRS 7285 4 rue Michel Brunet, TSA 51106 86073 Poitiers Cedex 9 France
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10
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Zuluaga-Villamil A, Mencia G, Asensio JM, Fazzini PF, Baquero EA, Chaudret B. N-Heterocyclic Carbene-Based Iridium and Ruthenium/Iridium Nanoparticles for the Hydrogen Isotope Exchange Reaction through C–H Bond Activations. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Alejandra Zuluaga-Villamil
- Estado Sólido y Catálisis Ambiental (ESCA), Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia, Carrera 30 No. 45-03, 111321 Bogotá, Colombia
| | - Gabriel Mencia
- LPCNO, Laboratoire de Physique et Chimie de Nano-Objets, UMR, 5215 INSA-CNRS-UPS, Institut National des Sciences Appliques 135, Avenue de Rangueil, 31077 Toulouse, France
| | - Juan M. Asensio
- LPCNO, Laboratoire de Physique et Chimie de Nano-Objets, UMR, 5215 INSA-CNRS-UPS, Institut National des Sciences Appliques 135, Avenue de Rangueil, 31077 Toulouse, France
| | - Pier-Francesco Fazzini
- LPCNO, Laboratoire de Physique et Chimie de Nano-Objets, UMR, 5215 INSA-CNRS-UPS, Institut National des Sciences Appliques 135, Avenue de Rangueil, 31077 Toulouse, France
| | - Edwin A. Baquero
- Estado Sólido y Catálisis Ambiental (ESCA), Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia, Carrera 30 No. 45-03, 111321 Bogotá, Colombia
| | - Bruno Chaudret
- LPCNO, Laboratoire de Physique et Chimie de Nano-Objets, UMR, 5215 INSA-CNRS-UPS, Institut National des Sciences Appliques 135, Avenue de Rangueil, 31077 Toulouse, France
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11
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Levernier E, Tatoueix K, Garcia-Argote S, Pfeifer V, Kiesling R, Gravel E, Feuillastre S, Pieters G. Easy-to-Implement Hydrogen Isotope Exchange for the Labeling of N-Heterocycles, Alkylkamines, Benzylic Scaffolds, and Pharmaceuticals. JACS AU 2022; 2:801-808. [PMID: 35557763 PMCID: PMC9088292 DOI: 10.1021/jacsau.1c00503] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Indexed: 06/07/2023]
Abstract
Facilitating access to deuterated and tritiated complex molecules is of paramount importance due to the fundamental role of isotopically labeled compounds in drug discovery and development. Deuterated analogues of drugs are extensively used as internal standards for quantification purposes or as active pharmaceutical ingredients, whereas tritiated drugs are essential for preclinical ADME studies. In this report, we describe the labeling of prevalent substructures in FDA-approved drugs such as azines, indoles, alkylamine moieties, or benzylic carbons by the in situ generation of Rh nanoparticles able to catalyze both C(sp2)-H and C(sp3)-H activation processes. In this easy-to-implement labeling process, Rh nanocatalysts are formed by decomposition of a commercially available rhodium dimer under a deuterium or tritium gas atmosphere (1 bar or less), using the substrate itself as a surface ligand to control the aggregation state of the resulting metallic clusters. It is noteworthy that the size of the nanoparticles observed is surprisingly independent of the substrate used and is homogeneous, as evidenced by transmission electron microscopy experiments. This method has been successfully applied to the one-step synthesis of (1) deuterated pharmaceuticals usable as internal standards for MS quantification and (2) tritiated drug analogues with very high molar activities (up to 113 Ci/mmol).
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Affiliation(s)
- Etienne Levernier
- Département
Médicaments et Technologies pour la Santé (DMTS), SCBM, Université Paris-Saclay, CEA, INRAE, 91191 Gif-sur-Yvette, France
| | - Kevin Tatoueix
- Département
Médicaments et Technologies pour la Santé (DMTS), SCBM, Université Paris-Saclay, CEA, INRAE, 91191 Gif-sur-Yvette, France
| | - Sébastien Garcia-Argote
- Département
Médicaments et Technologies pour la Santé (DMTS), SCBM, Université Paris-Saclay, CEA, INRAE, 91191 Gif-sur-Yvette, France
| | - Viktor Pfeifer
- Boehringer
Ingelheim Pharma GmbH & Co. KG, Birkendorfer Straße 65, 88397 Biberach an der Riß, Germany
| | - Ralf Kiesling
- Boehringer
Ingelheim Pharma GmbH & Co. KG, Birkendorfer Straße 65, 88397 Biberach an der Riß, Germany
| | - Edmond Gravel
- Département
Médicaments et Technologies pour la Santé (DMTS), SCBM, Université Paris-Saclay, CEA, INRAE, 91191 Gif-sur-Yvette, France
| | - Sophie Feuillastre
- Département
Médicaments et Technologies pour la Santé (DMTS), SCBM, Université Paris-Saclay, CEA, INRAE, 91191 Gif-sur-Yvette, France
| | - Grégory Pieters
- Département
Médicaments et Technologies pour la Santé (DMTS), SCBM, Université Paris-Saclay, CEA, INRAE, 91191 Gif-sur-Yvette, France
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12
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Yang H, Huang Z, Lehnherr D, Lam YH, Ren S, Strotman NA. Efficient Aliphatic Hydrogen-Isotope Exchange with Tritium Gas through the Merger of Photoredox and Hydrogenation Catalysts. J Am Chem Soc 2022; 144:5010-5022. [PMID: 35263094 DOI: 10.1021/jacs.1c13265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Employment of a combination of an organophotoredox catalyst with Wilkinson's catalyst (Rh(PPh3)3Cl) has given rise to an unprecedented method for hydrogen-isotope exchange (HIE) of aliphatic C(sp3)-H bonds of complex pharmaceuticals using T2 gas directly. Wilkinson's catalyst, commonly used for catalytic hydrogenations, was exploited as a precatalyst for activation of D2 or T2 and hydrogen atom transfer. In this combined methodology and mechanistic study, we demonstrate that by coupling photocatalysis with Rh catalysis, carbon-centered radicals generated via photoredox catalysis can be intercepted by Rh-hydride intermediates to deliver an effective hydrogen atom donor for hydrogen-isotope labeling of complex molecules in one step. By optimizing the ratio of the photocatalyst and Wilkinson's catalyst to balance the rate of the dual catalytic cycles, we can achieve efficient HIE and high recovery yield. This protocol was readily applied to direct HIE of C(sp3)-H bonds in 10 complex drug molecules, showing high isotope incorporation efficiency and exceptionally good functional group tolerance and demonstrating this approach as a practical and attractive labeling method for deuteration and tritiation.
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Affiliation(s)
- Haifeng Yang
- Process Research & Development, Merck & Co., Inc., Rahway, New Jersey 07065, United States
| | - Zheng Huang
- Process Research & Development, Merck & Co., Inc., Rahway, New Jersey 07065, United States
| | - Dan Lehnherr
- Process Research & Development, Merck & Co., Inc., Rahway, New Jersey 07065, United States
| | - Yu-Hong Lam
- Computational and Structural Chemistry, Merck & Co., Inc., Rahway, New Jersey 07065, United States
| | - Sumei Ren
- Process Research & Development, Merck & Co., Inc., Rahway, New Jersey 07065, United States
| | - Neil A Strotman
- Process Research & Development, Merck & Co., Inc., Rahway, New Jersey 07065, United States
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13
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He T, Klare HFT, Oestreich M. Perdeuteration of Deactivated Aryl Halides by H/D Exchange under Superelectrophile Catalysis. J Am Chem Soc 2022; 144:4734-4738. [PMID: 35258291 DOI: 10.1021/jacs.2c00080] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Superelectrophilic silylium/arenium ions are shown to be highly effective H/D exchange promoters for the exhaustive deuteration of electron-deficient aryl halides. Several of the resulting perdeuterated aryl halides have been previously inaccessible with existing deuterium-labeling procedures. Using inexpensive C6D6 as the deuterium source, excellent degrees of deuterium incorporation were achieved under ambient reaction conditions. Importantly, the perdeuteration remains unaffected on multigram scale, even at a reduced catalyst loading of 0.1 mol %. By this method, otherwise expensive or noncommercially available NMR solvents such as 1,2-dichloro- and 1,2-difluorobenzene can be prepared.
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Affiliation(s)
- Tao He
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 115, 10623 Berlin, Germany
| | - Hendrik F T Klare
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 115, 10623 Berlin, Germany
| | - Martin Oestreich
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 115, 10623 Berlin, Germany
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14
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Kopf S, Bourriquen F, Li W, Neumann H, Junge K, Beller M. Recent Developments for the Deuterium and Tritium Labeling of Organic Molecules. Chem Rev 2022; 122:6634-6718. [PMID: 35179363 DOI: 10.1021/acs.chemrev.1c00795] [Citation(s) in RCA: 141] [Impact Index Per Article: 70.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Organic compounds labeled with hydrogen isotopes play a crucial role in numerous areas, from materials science to medicinal chemistry. Indeed, while the replacement of hydrogen by deuterium gives rise to improved absorption, distribution, metabolism, and excretion (ADME) properties in drugs and enables the preparation of internal standards for analytical mass spectrometry, the use of tritium-labeled compounds is a key technique all along drug discovery and development in the pharmaceutical industry. For these reasons, the interest in new methodologies for the isotopic enrichment of organic molecules and the extent of their applications are equally rising. In this regard, this Review intends to comprehensively discuss the new developments in this area over the last years (2017-2021). Notably, besides the fundamental hydrogen isotope exchange (HIE) reactions and the use of isotopically labeled analogues of common organic reagents, a plethora of reductive and dehalogenative deuteration techniques and other transformations with isotope incorporation are emerging and are now part of the labeling toolkit.
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Affiliation(s)
- Sara Kopf
- Leibniz-Institut für Katalyse e. V., 18059 Rostock, Germany
| | | | - Wu Li
- Leibniz-Institut für Katalyse e. V., 18059 Rostock, Germany
| | | | - Kathrin Junge
- Leibniz-Institut für Katalyse e. V., 18059 Rostock, Germany
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15
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Yongsong T, Brož B, Tureček F, Marek A. Tritium hydrogen-isotope exchange with electron-poor tertiary benzenesulfonamide moiety; application in late-stage labeling of T0901317. J Labelled Comp Radiopharm 2022; 65:36-44. [PMID: 34957593 DOI: 10.1002/jlcr.3958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Revised: 12/14/2021] [Accepted: 12/16/2021] [Indexed: 11/08/2022]
Abstract
The multifunctional radioligand [3 H]T0901317 ([3 H]1) has been employed as a powerful autoradiographic tool to target several receptors, such as liver X, farnesoid X, and retinoic acid-related orphan receptor alpha and gamma subtypes at nanomolar concentrations. Although [3 H]1 is commercially available and its synthesis via tritiodebromination has been reported, the market price of this radioligand and the laborious synthesis of corresponding bromo-intermediate potentially preclude its widespread use in biochemical, pharmacological, and pathological studies in research lab settings. We exploit recent reports on hydrogen-isotope exchange (HIE) reactions in tertiary benzenesulfonamides where the sulfonamide represents an ortho-directing group that facilitates CH activation in the presence of homogenous iridium(I) catalysts. Herein, we report a time- and cost-efficient method for the tritium late-stage labeling of compound 1-a remarkably electron-poor substrate owing to the tertiary trifluoroethylsulfonamide moiety. Under a straightforward HIE condition using a commercially available Kerr-type NHC Ir(I) complex, [(cod)Ir (NHC)Cl], the reaction with 1 afforded a specific activity of 10.8 Ci/mmol. Additionally, alternative HIE conditions using the heterogeneous catalyst of Ir-black provided sufficient 0.72 D-enrichment of 1 but unexpectedly failed while repeating with tritium gas.
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Affiliation(s)
- Tian Yongsong
- Institute of Organic Chemistry and Biochemistry, The Czech Academy of Sciences, Prague, Czech Republic
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Břetislav Brož
- Institute of Organic Chemistry and Biochemistry, The Czech Academy of Sciences, Prague, Czech Republic
| | - František Tureček
- Department of Chemistry, University of Washington, Seattle, Washington, USA
| | - Aleš Marek
- Institute of Organic Chemistry and Biochemistry, The Czech Academy of Sciences, Prague, Czech Republic
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Li W, Rabeah J, Bourriquen F, Yang D, Kreyenschulte C, Rockstroh N, Lund H, Bartling S, Surkus AE, Junge K, Brückner A, Lei A, Beller M. Scalable and selective deuteration of (hetero)arenes. Nat Chem 2022; 14:334-341. [PMID: 35027706 PMCID: PMC8898765 DOI: 10.1038/s41557-021-00846-4] [Citation(s) in RCA: 38] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Accepted: 10/25/2021] [Indexed: 12/03/2022]
Abstract
Isotope labelling, particularly deuteration, is an important tool for the development of new drugs, specifically for identification and quantification of metabolites. For this purpose, many efficient methodologies have been developed that allow for the small-scale synthesis of selectively deuterated compounds. Due to the development of deuterated compounds as active drug ingredients, there is a growing interest in scalable methods for deuteration. The development of methodologies for large-scale deuterium labelling in industrial settings requires technologies that are reliable, robust and scalable. Here we show that a nanostructured iron catalyst, prepared by combining cellulose with abundant iron salts, permits the selective deuteration of (hetero)arenes including anilines, phenols, indoles and other heterocycles, using inexpensive D2O under hydrogen pressure. This methodology represents an easily scalable deuteration (demonstrated by the synthesis of deuterium-containing products on the kilogram scale) and the air- and water-stable catalyst enables efficient labelling in a straightforward manner with high quality control. ![]()
A method for the selective deuteration of anilines, indoles, phenols and heterocyclic compounds, including natural products and other bioactive molecules, has been developed. The nanostructured iron catalyst that underpins this process is prepared by combining cellulose with iron salts and has been used for the preparation of deuterated compounds on up to a kilogram scale.
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Affiliation(s)
- Wu Li
- Leibniz-Institut für Katalyse e.V., Rostock, Germany
| | - Jabor Rabeah
- Leibniz-Institut für Katalyse e.V., Rostock, Germany
| | | | - Dali Yang
- Institute for Advanced Studies (IAS), Wuhan University, Wuhan, P. R. China
| | | | | | - Henrik Lund
- Leibniz-Institut für Katalyse e.V., Rostock, Germany
| | | | | | - Kathrin Junge
- Leibniz-Institut für Katalyse e.V., Rostock, Germany
| | | | - Aiwen Lei
- Institute for Advanced Studies (IAS), Wuhan University, Wuhan, P. R. China.
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17
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Li W, Qu R, Liu W, Bourriquen F, Bartling S, Rockstroh N, Junge K, Beller M. Copper-catalysed low-temperature water-gas shift reaction for selective deuteration of aryl halides. Chem Sci 2021; 12:14033-14038. [PMID: 34760186 PMCID: PMC8565366 DOI: 10.1039/d1sc04259a] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Accepted: 09/17/2021] [Indexed: 12/17/2022] Open
Abstract
The introduction of deuterium atoms into organic compounds is of importance for basic chemistry, material sciences, and the development of drugs in the pharmaceutical industry, specifically for identification and quantification of metabolites. Hence, methodologies for the synthesis of selectively labelled compounds continue to be a major area of interest for many scientists. Herein, we present a practical and stable heterogeneous copper catalyst, which permits for dehalogenative deuteration via water–gas shift reaction at comparably low temperature. This novel approach allows deuteration of diverse (hetero)aryl halides with good functional group tolerance, and no reduction of the aromatic rings or other easily reducible formyl and cyano groups. Multi-gram experiments show the potential of this method in organic synthesis and medicinal chemistry. A practical and stable heterogeneous copper catalyst has been developed for dehalogenative deuteration via water–gas shift reaction at low temperature, allowing deuteration of diverse (hetero)aryl halides with good functional group tolerance.![]()
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Affiliation(s)
- Wu Li
- Leibniz-Institut für Katalyse e.V. Albert-Einstein-Straße 29a 18059 Rostock Germany
| | - Ruiyang Qu
- Leibniz-Institut für Katalyse e.V. Albert-Einstein-Straße 29a 18059 Rostock Germany
| | - Weiping Liu
- Leibniz-Institut für Katalyse e.V. Albert-Einstein-Straße 29a 18059 Rostock Germany
| | - Florian Bourriquen
- Leibniz-Institut für Katalyse e.V. Albert-Einstein-Straße 29a 18059 Rostock Germany
| | - Stephan Bartling
- Leibniz-Institut für Katalyse e.V. Albert-Einstein-Straße 29a 18059 Rostock Germany
| | - Nils Rockstroh
- Leibniz-Institut für Katalyse e.V. Albert-Einstein-Straße 29a 18059 Rostock Germany
| | - Kathrin Junge
- Leibniz-Institut für Katalyse e.V. Albert-Einstein-Straße 29a 18059 Rostock Germany
| | - Matthias Beller
- Leibniz-Institut für Katalyse e.V. Albert-Einstein-Straße 29a 18059 Rostock Germany
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Pfeifer V, Zeltner T, Fackler C, Kraemer A, Thoma J, Zeller A, Kiesling R. Palladium Nanoparticles for the Deuteration and Tritiation of Benzylic Positions on Complex Molecules. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202109043] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Viktor Pfeifer
- Boehringer Ingelheim Pharma GmbH & Co. KG Birkendorfer Straße 65 88397 Biberach an der Riß Germany
| | - Thomas Zeltner
- Department RC Tritec AG Institution Speicherstraße 60A CH-9053 Teufen Switzerland
| | - Christian Fackler
- Boehringer Ingelheim Pharma GmbH & Co. KG Birkendorfer Straße 65 88397 Biberach an der Riß Germany
| | - Anja Kraemer
- Boehringer Ingelheim Pharma GmbH & Co. KG Birkendorfer Straße 65 88397 Biberach an der Riß Germany
| | - Julian Thoma
- Department RC Tritec AG Institution Speicherstraße 60A CH-9053 Teufen Switzerland
| | - Albert Zeller
- Department RC Tritec AG Institution Speicherstraße 60A CH-9053 Teufen Switzerland
| | - Ralf Kiesling
- Boehringer Ingelheim Pharma GmbH & Co. KG Birkendorfer Straße 65 88397 Biberach an der Riß Germany
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19
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Pfeifer V, Zeltner T, Fackler C, Kraemer A, Thoma J, Zeller A, Kiesling R. Palladium Nanoparticles for the Deuteration and Tritiation of Benzylic Positions on Complex Molecules. Angew Chem Int Ed Engl 2021; 60:26671-26676. [PMID: 34424591 DOI: 10.1002/anie.202109043] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Indexed: 11/11/2022]
Abstract
Palladium nanoparticles (PdNp) were revealed as an efficient hydrogen isotope exchange catalyst for the deuterium and tritium labeling of benzylic positions of complex molecules. A practical way to obtain small palladium nanoparticles and to apply them as a catalyst for hydrogen isotope exchange (HIE) is presented. Several model compounds and popular bioactive molecules were submitted to HIE reactions catalyzed by the PdNp. Benzylic positions situated far away from heteroatoms were labeled with high isotopic enrichments. The observed non-directed HIE gave rise to regioselectivities complementary to those obtained with other methods, which typically require specific directing groups. For this reason, the successful deuteration of a broad variety of benzylic positions created a helpful tool to produce internal LC-MS standards of complex drugs. Furthermore, this nanocatalyst paved the way for the radiolabeling of drug molecules with high specific activities by using low pressures of tritium gas.
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Affiliation(s)
- Viktor Pfeifer
- Boehringer Ingelheim Pharma GmbH & Co. KG, Birkendorfer Straße 65, 88397, Biberach an der Riß, Germany
| | - Thomas Zeltner
- Department RC, Tritec AG, Institution Speicherstraße 60A, CH-9053, Teufen, Switzerland
| | - Christian Fackler
- Boehringer Ingelheim Pharma GmbH & Co. KG, Birkendorfer Straße 65, 88397, Biberach an der Riß, Germany
| | - Anja Kraemer
- Boehringer Ingelheim Pharma GmbH & Co. KG, Birkendorfer Straße 65, 88397, Biberach an der Riß, Germany
| | - Julian Thoma
- Department RC, Tritec AG, Institution Speicherstraße 60A, CH-9053, Teufen, Switzerland
| | - Albert Zeller
- Department RC, Tritec AG, Institution Speicherstraße 60A, CH-9053, Teufen, Switzerland
| | - Ralf Kiesling
- Boehringer Ingelheim Pharma GmbH & Co. KG, Birkendorfer Straße 65, 88397, Biberach an der Riß, Germany
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Nishimura T. Iridium-Catalyzed Hydroarylation via C-H Bond Activation. CHEM REC 2021; 21:3532-3545. [PMID: 34101981 DOI: 10.1002/tcr.202100109] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 05/15/2021] [Indexed: 01/02/2023]
Abstract
Hydroarylation reactions via C-H activation, which compensate for shortcomings of classical methods based on the Friedel-Crafts reaction, is one of the most attractive methods to synthesize substituted arenes. This Personal Account reviews our recent studies on iridium-catalyzed intermolecular hydroarylation of vinyl ethers, alkynes, bicycloalkenes, and 1,3-dienes, and intramolecular hydroarylation of m-allyloxyphenyl ketones, where asymmetric addition reactions are included. A cationic iridium catalyst, which is generated from chloroiridium [IrCl] and NaBArF 4 [ArF =3,5-(CF3 )2 C6 H3 ], or a hydroxoiridium [Ir(OH)] complex is effective in catalyzing the hydroarylation depending on the substrates. 1,5-Cyclooctadiene (cod), chiral dienes, and conventional bisphosphines function as ligands controlling the high reactivity and selectivity of the catalysts in the hydroarylation. H/D exchange reaction of alkenes by use of a key intermediate of the hydroarylation reaction is also described.
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Affiliation(s)
- Takahiro Nishimura
- Department of Chemistry, Graduate School of Science, Osaka City University, Sumiyoshi, Osaka, 558-8585, Japan
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The Natural Product Lepidiline A as an N-Heterocyclic Carbene Ligand Precursor in Complexes of the Type [Ir(cod)(NHC)PPh3)]X: Synthesis, Characterisation, and Application in Hydrogen Isotope Exchange Catalysis. Catalysts 2020. [DOI: 10.3390/catal10020161] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
A range of iridium(I) complexes of the type [Ir(cod)(NHC)PPh3)]X are reported, where the N-heterocyclic carbene (NHC) is derived from the naturally-occurring imidaozlium salt, Lepidiline A (1,3-dibenzyl-4,5-dimethylimidazolium chloride). A range of complexes were prepared, with a number of NHC ligands and counter-ions, and various steric and electronic parameters of these complexes were evaluated. The activity of the [Ir(cod)(NHC)PPh3)]X complexes in hydrogen isotope exchange reactions was then studied, and compared to established iridium(I) complexes.
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22
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Iridium Catalysts for Hydrogen Isotope Exchange. TOP ORGANOMETAL CHEM 2020. [DOI: 10.1007/3418_2020_58] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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