Development of fluorinated CB2 receptor agonists for PET studies
摘要:
A convergent strategy was followed to modify systematically carbazole based CB2 receptor ligands. The length of the N-(fluoroalkyl) group (n in 7), the length of the alkanamide (m in 7) and the substitution pattern of the phenyl moiety (X and Y in 7) were varied systematically. The highest CB2 affinity was found for the 2-fluoroethyl substituted carbazole derivative 20a (K-i = 5.8 nM) containing the propionamide and the 2-bromo-4-fluorophenyl moiety. According to docking studies 20a fits nicely into the binding pocket of the CB2 receptor, but elongation of the fluoroethyl side chain leads to a different binding mode of the ligands. The high CB2 affinity together with the high selectivity over the CB2 subtype qualifies the fluoroethyl derivative 20a to be developed as a PET tracer. (C) 2013 Elsevier Ltd. All rights reserved.
Discovery and Optimization of a Novel Series of <i>N</i>-Arylamide Oxadiazoles as Potent, Highly Selective and Orally Bioavailable Cannabinoid Receptor 2 (CB<sub>2</sub>) Agonists
作者:Yuan Cheng、Brian K. Albrecht、James Brown、John L. Buchanan、William H. Buckner、Erin F. DiMauro、Renee Emkey、Robert T. Fremeau、Jean-Christophe Harmange、Beth J. Hoffman、Liyue Huang、Ming Huang、Josie Han Lee、Fen-Fen Lin、Matthew W. Martin、Hung Q. Nguyen、Vinod F. Patel、Susan A. Tomlinson、Ryan D. White、Xiaoyang Xia、Stephen A. Hitchcock
DOI:10.1021/jm800463f
日期:2008.8.1
describe the discovery of a novel class of oxadiazole derivatives from which potent and selective CB2 agonist leads were developed. Initial hit 7 was identified from a cannabinoid target-biased library generated by virtual screening of sample collections using a pharmacophore model in combination with a series of physicochemical filters. 7 was demonstrated to be a selective CB2 agonist (CB2 EC50 = 93
Optimization of pharmacokinetic properties by modification of a carbazole-based cannabinoid receptor subtype 2 (CB2) ligand
作者:Dominik Heimann、Frederik Börgel、Henk de Vries、Kim Bachmann、Victoria E. Rose、Bastian Frehland、Dirk Schepmann、Laura H. Heitman、Bernhard Wünsch
DOI:10.1016/j.ejmech.2017.10.049
日期:2018.1
13b) were synthesized and pharmacologicallyevaluated. The key step in the synthesis of substituted carbazoles 23a, 24a and 26a was a Fischer indole synthesis. Nucleophilic substitution of tosylated lactate 5 by carbazole anion provided the fluoroisopropyl derivatives 13a and 13b. Partial hydrogenation of the aromatic carbazole system (26a) was not tolerated by the CB2 receptor. A methylsulfonyl moiety