Synthesis,in vitro pharmacology and radiosynthesis ofN-(cis-4-fluoromethylcycloyhexyl)-4-(1(H)-imidazol-4-yl)piperidine-11-thiocarbonamide (VUF 5000), a potential PET ligand for the histamine H3 receptor
作者:Albert D. Windhorst、Henk Timmerman、Wiro M. P. B. Menge、Rob Leurs、Jacobus D. M. Herscheid
DOI:10.1002/(sici)1099-1344(199903)42:3<293::aid-jlcr191>3.0.co;2-b
日期:1999.3
The synthesis of N-(cis-4-fluoromethylcyclohexyl)-4-(1(H)-imidazol-4-yl)piperidine-1-thiocarbonamide (VUF 5000) 3, a fluorinated analogue of the potent (pA(2) value of 8.9 +/- 0.1, K-i = 4.3 +/- 0.9 nM) histamine H-3 receptor antagonist thioperamide 2 is described. After the establishment of the H-3 antagonistic activity of VUF 5000, pA(2) value = 9.0 +/- 0.2, K-i = 2.3 +/- 0.5 nM, a four step synthesis for the radiolabelling of VUF 5000 with F-18 (half life 110 min) was developed. Within 4 hours of the end of the bombartment, [F-18]VUF 5000 was obtained with an average radiochemical yield of 23% (decay corrected) acid a specific activity > 96.2 TBq/mu mol (2.6 Ci/mu mol).