Synthesis of [11C]2?-carbomethoxy-3?-(3?-iodo-4?-methyl, -ethyl and isopropyl phenyl)nortropane as potential radiotracers for examination of the serotonin transporter with positron emission tomography
作者:Johan Sandell、Christer Halldin、Julie Helfenbein、Yuan-Hwa Chou、Johnny Vercouillie、Patrick Emond、Carl-Gunnar Swahn、Denis Guilloteau、Lars Farde
DOI:10.1002/1099-1344(200009)43:10<1033::aid-jlcr389>3.0.co;2-5
日期:2000.9
perchloric acid and acetic acid followed by a solution of iodine in dichloromethane. N-desmethylation was performed by using 2,2,2-trichloroethylchloroformiate followed by treatment of zinc in acetic acid. Acidic hydrolysis of the ester functions gave the carboxylic acid analogues of LBT-14, EINT and LBT-44. The precursors were labelled with 11C using [11C]methyl iodide or [11C] methyl triflate in
抑郁症和焦虑症的研究将受益于开发合适的放射性配体,用于 5-羟色胺转运蛋白的 PET 成像。三种可卡因类似物 2β-carbomethoxy-3β-(3'-iodo-4'-methyl, -ethyl and isopropyl phenyl)nortropane(LBT-14、EINT 和 LBT-44)通过三步合成制备-4 作为第一步,将合适的格氏试剂加入到脱水芽子碱甲酯中。苯环的碘化是用黄色氧化汞、高氯酸和乙酸的混合物,然后用碘的二氯甲烷溶液完成的。N-去甲基化是通过使用 2,2,2-三氯乙基氯甲酸酯然后在乙酸中处理锌来进行的。酯官能团的酸水解得到LBT-14、EINT和LBT-44的羧酸类似物。使用 [11C] 甲基碘或 [11C] 三氟甲磺酸甲酯的二甲基甲酰胺 (DMF) 和四丁基氢氧化铵 (TBAH) 作为碱,用 11C 标记前体。[11C]LBT-14、[11C]EINT 和[11C]LBT-44