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Towards stereoselective radiosynthesis of alpha-[C-11]methylsubstituted aromatic alpha-amino acids - a challenge of creation of quaternary asymmetric centre in a very short time

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F07%3A00094858" target="_blank" >RIV/60077344:_____/07:00094858 - isvavai.cz</a>

  • Alternative codes found

    RIV/60076658:12640/07:00008324

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    Towards stereoselective radiosynthesis of alpha-[C-11]methylsubstituted aromatic alpha-amino acids - a challenge of creation of quaternary asymmetric centre in a very short time

  • Original language description

    In positron emission tomography (PET) alpha-methyl amino acids have two potential applications: As analogues of neutransmitter precursors for the study of neurodegenerative diseases, and as non-metabolised analogues of proteinogenic amino acids for the study of amino acid uptake into normal and cancer cells. Clinical applications of such amino acids are strongly limited due to their poor availability. We carried out [C-11]methylation of metalocomplex synthons derived from protected DOPA or tyrosine. After 10min at 25 ?C, a 9% radiochemical yield (decay-corrected) of a mixture of the diastereomeric alpha-[C-11]methylDOPA complexes or a 7% radiochemical yield of a mixture of the diastereomeric alpha-[C-11]methyltyrosine complexes was achieved. Optimisation of the procedure including hydrolysis of the complexes (hydrolytic deprotection of enantiomerically pure amino acids) and subsequent purification of the enantiomers of a-[11C]methyID0PA and alpha-[C-11]methyltyrosine is underway.

  • Czech name

    Stereoselectivní radiosyntéza alfa-[C-11]methylsubstituovaných aromatických alfa-amino acids ? stimul k syntéze kvarterního asymetrického centra ve velmi krátké době

  • Czech description

    V pozitronové emisní tomografii (PET) alfa-amino kyseliny mají dvě aplikace: jako analogy neurotransmiterových prekurzorů při studiu neurodegenerativních onemocnění a jako nemetabolizované analogy proteinotvorných aminokyselin při studiu rakovinových buněk. Klinické aplikace modifikovaných aminokyselin jsou omezeny jejich nedostupností. V prácie zkoumána [C-11] methylace metalokomplexních synthonů DOPA a tyrosinu. Při 25?C po 10 min. byly získány s 9% výtěžkem diastereomerní komplexy směsi alfa-[C-11] methylDOPA a se 7% výtěžkem směs alpha-[C-11]methyltyrosinového komplexu. Optimalizace postupu včetně hydrolýzy komplexů a čištění enantiomerů alfa-[11C]methyID0PA and alfa-[C-11]methyltyrosinu jsou ve vývoji.

Classification

  • Type

    J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    CE - Biochemistry

  • OECD FORD branch

Result continuities

  • Project

  • Continuities

    Z - Vyzkumny zamer (s odkazem do CEZ)

Others

  • Publication year

    2007

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Journal of Labelled Compounds and Radiopharmaceuticals

  • ISSN

    0362-4803

  • e-ISSN

  • Volume of the periodical

    50

  • Issue of the periodical within the volume

    5-6

  • Country of publishing house

    GB - UNITED KINGDOM

  • Number of pages

    5

  • Pages from-to

    370-374

  • UT code for WoS article

  • EID of the result in the Scopus database