By structure-activity relationship studies on the tilorone scaffold, the 'one armed' substituted dibenzothiophenes and the fluoren-9-ones were identified as the most potential α nAChR ligands. While the suitability of dibenzothiophene derivatives as PET tracers is recognized, the potential of fluoren-9-ones is insufficiently investigated. We herein report on a series of fluoren-9-one based derivatives targeting α nAChR with compounds 8a and 8c possessing the highest affinity and selectivity. Accordingly, with [F]8a and [F]8c we designed and initially evaluated the first fluoren-9-one derived α nAChR selective PET ligands. A future application of these radioligands is facilitated by the herein presented successful implementation of fully automated radiosynthesis.
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| http://dx.doi.org/10.1016/j.bmcl.2018.03.081 | DOI Listing |
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