The present invention provides novel alpha-fluoroalkyl dihydrotetrabenazine compounds I
wherein R
1
is a C
1
-C
10
fluorinated aliphatic radical; R
2
is hydrogen or a C
1
-C
10
aliphatic radical; R
3
is hydrogen or a C
1
-C
10
aliphatic radical; and R
4
is a C
1
-C
10
aliphatic radical, a C
3
-C
10
cycloaliphatic radical, or a C
3
-C
10
aromatic radical. The alpha-fluoroalkyl dihydrotetrabenazine compounds are provided in both racemic and enantiomerically enriched forms and may comprise either or both of fluorine-18 and fluorine 19. The alpha-fluoroalkyl dihydrotetrabenazine compounds are believed to possess high affinity for VMAT-2, a biomarker implicated in human diabetes. The alpha-fluoroalkyl dihydrotetrabenazine compounds comprising a fluorine-18 group are useful as PET imaging agents targeting the VMAT-2 biomarker. The non-radiolabled alpha-fluoroalkyl dihydrotetrabenazine compounds are useful as probes for the discovery of PET imaging agents.
本发明提供了新型α-氟烷基二氢四氢异
脲白菜碱化合物I,其中R1是C1-C10
氟化脂肪基;R2是氢或C1-C10脂肪基;R3是氢或C1-C10脂肪基;R4是C1-C10脂肪基、C3-C10环烷基或C3-C10芳香基。α-氟烷基二氢四氢异
脲白菜碱化合物以两种形式提供,即外消旋和对映富集,并且可能包含
氟-18和
氟-19中的一个或两个。认为α-氟烷基二氢四氢异
脲白菜碱化合物具有高亲和力VMAT-2,这是与人类糖尿病有关的
生物标志物。含
氟-18基团的α-氟烷基二氢四氢异
脲白菜碱化合物可用作PET成像剂,针对VMAT-2
生物标志物。非放射性α-氟烷基二氢四氢异
脲白菜碱化合物可用作探针,用于发现PET成像剂。