Fluorinated derivatives 3,14-dihydroxy-4,5.alpha.-epoxy-6.beta.-fluoro-17-methylmorphinan ("fluorooxymorphone"; FOXY, compound 10) and 17-cyclopropylmethyl-3,14-dihydroxy-4,5.alpha.-epoxy-6.beta.-fluoromorphin an (CYCLOFOXY, compound 18) are prepared based upon the structures of the potent opioid agonist oxymorphone 4 and the antagonist naltrexone 11, respectively. Fluorine was introduced in the final stages of synthesis by a facile nucleophilic displacement with fluoride ion of the 6.alpha.-triflate functions in 8 and 16. The synthetic procedures were suitable for the production of the corresponding positron emitting .sup.18 F-labeled analogs .sup.18 F-FOXY and .sup.18 F-CYCLOFOXY, which are useful for in vivo studies of the opioid receptor system using positron emission transaxial tomography. In addition, the tritiation of FOXY (10) to high specific activity is noted.
氟衍
生物3,14-二羟基-4,5.alpha.-环氧-6.beta.-
氟-17-甲基
吗啡啶("
氟氧吗啡"; FOXY,化合物10)和17-
环丙基甲基-3,14-二羟基-4,5.alpha.-环氧-6.beta.-
氟吗啡啶(CYCLOFOXY,化合物18)是根据强效阿片类受体激动剂
吗啡酮4和拮抗剂
纳曲酮11的结构制备的。
氟在合成的最后阶段通过与8和16中的6.alpha.-
三氟甲磺酸酯官能团的
氟化物离子进行易于的亲核取代引入。合成程序适用于生产相应的正电子发射.sup.18 F标记的类似物.sup.18 F-FOXY和.sup.18 F-CYCLOFOXY,这对利用正电子发射横断层扫描进行阿片类受体系统体内研究非常有用。此外,将FOXY(10)三氚化为高比活性的过程也值得注意。