Synthesis and biological evaluation of novel fluoro and iodo quinoline carboxamides as potential ligands of NK-3 receptors for in vivo imaging studies
摘要:
In order to develop radioligands of human NK-3 receptor (hNK-3r) for imaging studies by positron emission tomography (PET) or single photon emission computed tomography (SPECT), a new series of fluoro- and iodo-quinoline carboxamides were synthesized and evaluated in a target receptor binding assay. Compared to the unsubstituted parent compound SB 223 412 (K-i = 27 nM +/- 9). affinity was not altered for the analogues 1c and 2c bearing a fluorine in position 8 (K-i similar to 24-27 nM), and was only slightly reduced for compounds 1b, 2b, 1c and 2e fluorinated or iodinated at the position 7 (K-i similar to 49-67 nM). A drastic reduction in binding (K-i > 115 nM) was observed for all other halogenated compounds 1a, 2a, 1d, 2d, 1f and 2f. (C) 2004 Elsevier Ltd. All rights reserved.
Synthesis and biological evaluation of novel fluoro and iodo quinoline carboxamides as potential ligands of NK-3 receptors for in vivo imaging studies
摘要:
In order to develop radioligands of human NK-3 receptor (hNK-3r) for imaging studies by positron emission tomography (PET) or single photon emission computed tomography (SPECT), a new series of fluoro- and iodo-quinoline carboxamides were synthesized and evaluated in a target receptor binding assay. Compared to the unsubstituted parent compound SB 223 412 (K-i = 27 nM +/- 9). affinity was not altered for the analogues 1c and 2c bearing a fluorine in position 8 (K-i similar to 24-27 nM), and was only slightly reduced for compounds 1b, 2b, 1c and 2e fluorinated or iodinated at the position 7 (K-i similar to 49-67 nM). A drastic reduction in binding (K-i > 115 nM) was observed for all other halogenated compounds 1a, 2a, 1d, 2d, 1f and 2f. (C) 2004 Elsevier Ltd. All rights reserved.