Vlek JW, Feitsma KG, van der Mark TW, Drenth BF, Paans AM, Vaalburg W. Synthesis of d-[11C]oxyphenonium iodide, a potential radioligand for in vivo visualization of human cholinergic muscarinic receptor-sites by positron emission tomography.
INTERNATIONAL JOURNAL OF RADIATION APPLICATIONS AND INSTRUMENTATION. PART A, APPLIED RADIATION AND ISOTOPES 1990;
41:453-6. [PMID:
2166012 DOI:
10.1016/0883-2889(90)90004-z]
[Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Carbon-11 labeled d-oxyphenonium iodide, a cholinergic antagonist is synthesized for in vivo visualization of muscarinic receptor-sites on airway tissue by positron emission tomography (PET). Methylation with [11C]CH3I of d-demethyloxyphenonium, followed by HPLC purification affords the desired radiopharmaceutical with a radiochemical yield of 66% (based on [11C]CH3I, and corrected for decay) and with a specific activity of 110-300 Ci/mmol. The biologically active labeled d-enantiomer is prepared within 40 min after EOB. Optical and chemical purity proved to be better than 99.9%. Radiochemical purity was determined to be higher than 99%.
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