Heteroaromatic and Aniline Derivatives of Piperidines As Potent Ligands for Vesicular Acetylcholine Transporter
摘要:
To identify suitable lipophilic compounds having high potency and selectivity for vesicular acetylcholine transporter (VAChT), a heteroaromatic ring or a phenyl group was introduced into the carbonyl-containing scaffold for VAChT ligands. Twenty new compounds with ALogD values between 0.53 and 3.2 were synthesized, and their in vitro binding affinities were assayed. Six of them (19a, 19e, 19g, 19k, and 24a-b) displayed high affinity for VAChT (K-i = 0.93-18 nM for racemates) and moderate to high selectivity for VAChT over sigma(1) and sigma(2) receptors (K-i = 44-4400-fold). These compounds have a methyl or a fluoro substitution that provides the position for incorporating PET radioisotopes C-11 or F-18. Compound (-)-[C-11]24b (K-i = 0.78 nM for VAChT, 1200-fold over sigma receptors) was successfully synthesized and evaluated in vivo in rats and nonhuman primates. The data revealed that (-)-[C-11]24b has highest binding in striatum and has favorable pharmacokinetics in the brain.
Heteroaromatic and Aniline Derivatives of Piperidines As Potent Ligands for Vesicular Acetylcholine Transporter
摘要:
To identify suitable lipophilic compounds having high potency and selectivity for vesicular acetylcholine transporter (VAChT), a heteroaromatic ring or a phenyl group was introduced into the carbonyl-containing scaffold for VAChT ligands. Twenty new compounds with ALogD values between 0.53 and 3.2 were synthesized, and their in vitro binding affinities were assayed. Six of them (19a, 19e, 19g, 19k, and 24a-b) displayed high affinity for VAChT (K-i = 0.93-18 nM for racemates) and moderate to high selectivity for VAChT over sigma(1) and sigma(2) receptors (K-i = 44-4400-fold). These compounds have a methyl or a fluoro substitution that provides the position for incorporating PET radioisotopes C-11 or F-18. Compound (-)-[C-11]24b (K-i = 0.78 nM for VAChT, 1200-fold over sigma receptors) was successfully synthesized and evaluated in vivo in rats and nonhuman primates. The data revealed that (-)-[C-11]24b has highest binding in striatum and has favorable pharmacokinetics in the brain.
The present invention provides radiolabeled compounds useful as radiotracers for quantitative imaging of CH24H in mammals. The compound of the present invention is represented by the formula (I): wherein each symbol is as defined in the specification.
[EN] SUBSTITUTED QUINOXALINE DERIVATIVES<br/>[FR] DÉRIVÉS DE QUINOXALINE SUBSTITUÉS
申请人:SELVITA S A
公开号:WO2016180536A1
公开(公告)日:2016-11-17
The present invention relates to substituted quinoxaline derivatives. These compounds are useful for the prevention and/or treatment of several medical conditions including hyperproliferative disorders and diseases.
Compounds comprising 4-benzoylpiperidine as a Sigma-1-selective ligand
申请人:Tu Zhude
公开号:US20110311447A1
公开(公告)日:2011-12-22
Bipiperidinyl compounds and salts thereof are disclosed. The compounds include high affinity ligands for σ
1
receptors. Some compounds are also highly selective for σ
1
receptor compared to σ
2
receptor. Compounds can comprise radioisotopes, including
18
F or
11
C. Radiolabeled compounds can be used as probes for imaging distribution of σ
1
receptor in a subject such as a human using positron emission tomography (PET) scanning.