Aporphines. 58. N-(2-Chloroethyl)[8,9-2H]norapomorphine, an irreversible ligand for dopamine receptors: synthesis and application
摘要:
The synthesis of the title compounds (1c and its 2H isomer 1b) from N-(2-hydroxyethyl)norapomorphine was carried out by ring bromination, followed by chlorination to the 2-chloroethyl compound 6. Further reduction with 2H2 or 3H2 and Pd/C gave 1b or 1c. Radiochemically pure (97%) 1c was obtained with a specific activity of 16.3 Ci/mmol. The purity of 1c was determined by LC, HPLC, UV, and NMR. [3H]NCA was shown to label the D2 receptor; however, the D2 signal appears to be only a small portion of the total signal, which may include binding to other dopamine receptor subtypes (D1 and D3).
[EN] RADIOLABELLING METHODS<br/>[FR] PROCÉDÉS DE RADIO-ÉTIQUETAGE
申请人:HAMMERSMITH IMANET LTD
公开号:WO2008075043A1
公开(公告)日:2008-06-26
[EN] The present invention relates to methods of synthesising radiolabelled compounds, to the precursors useful in such methods and to the radiolabelled compounds obtainable by such methods. More particularly, the present invention relate to methods, precursors and radiolabelled compounds useful in Positron Emission Tomography (PET) and Single Photon Emission Computed Tomography (SPECT) especially for imaging neuroreceptors with radiolabelled agonists. [FR] La présente invention concerne des procédés de synthèse de composés radio-étiquetés, les précurseurs utiles dans de tels procédés et les composés radio-étiquetés que l'on peut obtenir à l'aide desdits procédés. Plus particulièrement, la présente invention concerne les procédés, précurseurs et composés radio-étiquetés servant à la tomographie par émission de positons (PET) et la tomographie d'émission monophotonique (SPECT) spécialement pour l'imagerie des neurorécepteurs avec agonistes radio-étiquetés.