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Brahms A, Pravdivtsev AN, Stamp T, Ellermann F, Sönnichsen FD, Hövener J, Herges R. Synthesis of 13 C and 2 H Labeled Vinyl Pyruvate and Hyperpolarization of Pyruvate. Chemistry 2022; 28:e202201210. [PMID: 35905033 PMCID: PMC9804285 DOI: 10.1002/chem.202201210] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Indexed: 01/05/2023]
Abstract
The hyperpolarization of nuclear spins has enabled unique applications in chemistry, biophysics, and particularly metabolic imaging. Parahydrogen-induced polarization (PHIP) offers a fast and cost-efficient way of hyperpolarization. Nevertheless, PHIP lags behind dynamic nuclear polarization (DNP), which is already being evaluated in clinical studies. This shortcoming is mainly due to problems in the synthesis of the corresponding PHIP precursor molecules. The most widely used DNP tracer in clinical studies, particularly for the detection of prostate cancer, is 1-13 C-pyruvate. The ideal derivative for PHIP is the deuterated vinyl ester because the spin physics allows for 100 % polarization. Unfortunately, there is no efficient synthesis for vinyl esters of β-ketocarboxylic acids in general and pyruvate in particular. Here, we present an efficient new method for the preparation of vinyl esters, including 13 C labeled, fully deuterated vinyl pyruvate using a palladium-catalyzed procedure. Using 50 % enriched parahydrogen and mild reaction conditions, a 13 C polarization of 12 % was readily achieved; 36 % are expected with 100 % pH2 . Higher polarization values can be potentially achieved with optimized reaction conditions.
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Affiliation(s)
- Arne Brahms
- Otto Diels Institute for Organic ChemistryKiel UniversityOtto-Hahn-Platz 424118KielGermany
| | - Andrey N. Pravdivtsev
- Section Biomedical ImagingMolecular Imaging North Competence Center (MOIN CC)Department of Radiology and NeuroradiologyUniversity Medical Center KielKiel UniversityAm Botanischen Garten 1424118KielGermany
| | - Tim Stamp
- Otto Diels Institute for Organic ChemistryKiel UniversityOtto-Hahn-Platz 424118KielGermany
| | - Frowin Ellermann
- Section Biomedical ImagingMolecular Imaging North Competence Center (MOIN CC)Department of Radiology and NeuroradiologyUniversity Medical Center KielKiel UniversityAm Botanischen Garten 1424118KielGermany
| | - Frank D. Sönnichsen
- Otto Diels Institute for Organic ChemistryKiel UniversityOtto-Hahn-Platz 424118KielGermany
| | - Jan‐Bernd Hövener
- Section Biomedical ImagingMolecular Imaging North Competence Center (MOIN CC)Department of Radiology and NeuroradiologyUniversity Medical Center KielKiel UniversityAm Botanischen Garten 1424118KielGermany
| | - Rainer Herges
- Otto Diels Institute for Organic ChemistryKiel UniversityOtto-Hahn-Platz 424118KielGermany
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Kumar N, Devineni SR, Singh G, Kadirappa A, Dubey SK, Kumar P. Identification, isolation and characterization of potential process-related impurity and its degradation product in vildagliptin. J Pharm Biomed Anal 2015; 119:114-21. [PMID: 26678178 DOI: 10.1016/j.jpba.2015.11.044] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Revised: 11/27/2015] [Accepted: 11/27/2015] [Indexed: 01/13/2023]
Abstract
Vildagliptin is a member of a new class of oral anti-diabetic drug. One unknown impurity was identified in the range of 0.01-0.06% in different laboratory batches of vildagliptin along with known impurities by HPLC analysis. The structure of unknown impurity was proposed as (2S)-1-[2-[(3-hydroxyadamantan-1-yl)imino]acetyl]pyrrolidine-2-carbonitrile (Impurity-E) using LC/ESI-MS(n) study. The unknown impurity was found to be unstable in diluent (H2O:CH3CN) and degrading into another stable impurity. The degraded stable impurity was isolated from enriched reaction crude sample by semi preparative liquid chromatography. The structure of stable impurity was established using FT-IR, NMR ((1)H, (13)C and DEPT), 2D NMR (HSQC, HMBC and COSY) and mass spectral data as (8aS)-3-hydroxy-octahydropyrrolo[1,2-a]piperazine-1,4-dione (Impurity-F). Impurity identification, abnormal behaviour of impurity-E, isolation of impurity-F, fragmentation mechanism and structural elucidation were also discussed.
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Affiliation(s)
- Neeraj Kumar
- Micro Labs Ltd., Chemical Research Department, API R&D Centre, Bommasandra-Jigini Link Road, KIADB INDL Area, Bommasandra, Bangalore 560105, Karnataka, India
| | - Subba Rao Devineni
- Micro Labs Ltd., Chemical Research Department, API R&D Centre, Bommasandra-Jigini Link Road, KIADB INDL Area, Bommasandra, Bangalore 560105, Karnataka, India
| | - Gurmeet Singh
- Micro Labs Ltd., Analytical Research Department, API R&D Centre, Bommasandra-Jigini Link Road, KIADB INDL Area, Bommasandra, Bangalore 560105, Karnataka, India
| | - A Kadirappa
- Micro Labs Ltd., Chemical Research Department, API R&D Centre, Bommasandra-Jigini Link Road, KIADB INDL Area, Bommasandra, Bangalore 560105, Karnataka, India
| | - Shailendra Kumar Dubey
- Micro Labs Ltd., Chemical Research Department, API R&D Centre, Bommasandra-Jigini Link Road, KIADB INDL Area, Bommasandra, Bangalore 560105, Karnataka, India
| | - Pramod Kumar
- Micro Labs Ltd., Chemical Research Department, API R&D Centre, Bommasandra-Jigini Link Road, KIADB INDL Area, Bommasandra, Bangalore 560105, Karnataka, India.
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Noordik JH, Herscheid KDM, Tijhuis MW, Ottenheijm HCJ. On the conformation and dimerization of a 2-mercapto-5-methylenepiperazine-3,6-dione. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/recl.19780970402] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Jin S, Wessig P, Liebscher J. Intermolecular and Intramolecular Diels−Alder Cycloadditions of 3-Ylidenepiperazine-2,5-diones and 5-Acyloxy-2(1H)-pyrazinones. J Org Chem 2001; 66:3984-97. [PMID: 11375024 DOI: 10.1021/jo0100897] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The 3-ylidenepiperazine-2,5-diones 16 and 39 and 5-acyloxy-2(1H)-pyrazinones 17 can serve as starting materials for the Diels-Alder reactions of alkenes and alkynes to the piperazine ring, under acidic conditions or in the presence of acetyl chloride, to afford tricyclic piperazine-2,5-diones 19, 20, 23-25, 27, 44, and 45. Intramolecular cycloadditions occur if 3-ylidenepiperazine-2,5-diones 30 and 32 are used as the starting materials. This procedure is a convenient path to bridged bicyclo[2.2.2]diazaoctane ring systems such as 31 and 33, the former being found in biologically active secondary mold metabolites, such as VM55599 (1) or brevianamide A (5), which have been isolated from various fungi. The synthesis of the indole compound 31 provided evidence for the proposed biochemical pathway with a Diels-Alder reaction as key step. Quantum chemical calculations have revealed that piperazinones with a cationic azadiene moiety are the most reactive species in Diels-Alder cycloadditions.
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Affiliation(s)
- S Jin
- Institut für Chemie, Humboldt-Universität Berlin, Hessische Strasse 1-2, 10115 Berlin, Germany
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Rajappa S, Natekar MV. Piperazine-2,5-diones and Related Lactim Ethers. ADVANCES IN HETEROCYCLIC CHEMISTRY 1993. [DOI: 10.1016/s0065-2725(08)60889-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/12/2023]
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Moss WO, Jones AC, Wisedale R, Mahon MF, Molloy KC, Bradbury RH, Hales NJ, Gallagher T. 2-Amino ketene S,S-acetals as α-amino acid homoenolate equivalents. Synthesis of 3-substituted prolines and molecular structure of 2-(N-pivaloylpyrrolidin-2-ylidene)-1,3-dithiane. ACTA ACUST UNITED AC 1992. [DOI: 10.1039/p19920002615] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Saturated Bicyclic 6/5 Ring Fused Systems with Bridgehead Nitrogen and a Single Additional Heeroatom. ADVANCES IN HETEROCYCLIC CHEMISTRY 1990. [DOI: 10.1016/s0065-2725(08)60555-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register]
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Witiak DT, Wei Y. Dioxopiperazines: chemistry and biology. PROGRESS IN DRUG RESEARCH. FORTSCHRITTE DER ARZNEIMITTELFORSCHUNG. PROGRES DES RECHERCHES PHARMACEUTIQUES 1990; 35:249-363. [PMID: 2290982 DOI: 10.1007/978-3-0348-7133-4_7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- D T Witiak
- Division of Medicinal Chemistry, College of Pharmacy, Ohio State University, Columbus 43210
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Schmidt U, Häusler J, Ohler E, Poisel H. Dehydroamino acids, alpha-hydroxy-alpha-amino acids and alpha-mercapto-alpha-amino acids. FORTSCHRITTE DER CHEMIE ORGANISCHER NATURSTOFFE = PROGRESS IN THE CHEMISTRY OF ORGANIC NATURAL PRODUCTS. PROGRES DANS LA CHIMIE DES SUBSTANCES ORGANIQUES NATURELLES 1979; 37:251. [PMID: 396213 DOI: 10.1007/978-3-7091-8545-2_3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Öhler E, Prantz E, Schmidt U. Über Aminosäuren und Peptide, XXVII: Über Dehydroaminosäuren, XIV: Biomimetische Versuche zur Cysteinbildung. Addition von SH-Verbindungen an Dehydroaminosäuren. ACTA ACUST UNITED AC 1978. [DOI: 10.1002/cber.19781110325] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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16
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Häusler J, Jahn R, Schmidt U. Über Aminosäuren und Peptide, XXIV: Radikalisch und photochemisch initiierte Oxidation von Aminosäurederivaten. ACTA ACUST UNITED AC 1978. [DOI: 10.1002/cber.19781110134] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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17
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H�usler J, Schmidt U. Ringschl�sse von Pyruvoylpeptiden und Dehydropeptiden �ber Aminos�uren und Peptide, XXIV; �ber Dehydroaminos�uren, XI. MONATSHEFTE FUR CHEMIE 1978. [DOI: 10.1007/bf00911954] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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18
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Schmidt U, Häusler J, Öhler E, Poisel H. Bemerkungen zur „Three-step Synthesis of a Gliotoxin Analogue⃛” vonH. C. J. Ottenheijm et al. ACTA ACUST UNITED AC 1977. [DOI: 10.1002/cber.19771101128] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Öhler E, Schmidt U. Über Aminosäuren und Peptide, XVII. über Dehydroaminosäuren, IV. Ringschlüsse an Dehydropeptiden. ACTA ACUST UNITED AC 1977. [DOI: 10.1002/cber.19771100312] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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20
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Kuhla D, Lombardino J. Pyrrolodiazines with a Bridgehead Nitrogen. ADVANCES IN HETEROCYCLIC CHEMISTRY 1977. [DOI: 10.1016/s0065-2725(08)60729-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/12/2023]
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22
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23
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Delbecq F, Gore J. Trialkylallenes from 1,1-disubstituted propargylic acetates. Angew Chem Int Ed Engl 1976; 15:497-8. [PMID: 822758 DOI: 10.1002/anie.197604971] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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24
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Poisel H, Schmidt U. Über Aminosäuren und Peptide, XVI. Über Dehydroaminosäuren, III. Additionen an α-Iminocarbonsäuren. ACTA ACUST UNITED AC 1975. [DOI: 10.1002/cber.19751080911] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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25
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Öhler E, Schmidt U. Über Aminosäuren und Peptide, XV. Hydroxylsubstituierte Cyclodipeptide durch Ringschluß von Pyruvoylaminosäureamiden, II Zweifacher Ringschluß. ACTA ACUST UNITED AC 1975. [DOI: 10.1002/cber.19751080910] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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26
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Schmidt U, Perco A, Öhler E. Über Aminosäuren und Peptide, XII Über Dehydroaminosäuren, I. Ringschluß des Z-Dehydroalanyl-L-prolin-N-methylamids zum Z-Amino-cyclodipeptid durch Amidaddition an die CC-Doppelbindung. ACTA ACUST UNITED AC 1974. [DOI: 10.1002/cber.19741070903] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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