Synthesis, Evaluation, and Radiolabeling of New Potent Positive Allosteric Modulators of the Metabotropic Glutamate Receptor 2 as Potential Tracers for Positron Emission Tomography Imaging
摘要:
The synthesis and in vitro and in vivo evaluation of a new series of 7-(phenylpiperidinyl)-1,2,4-triazolo[4,3-a]pyridines, which were conveniently radiolabeled with carbon-11, as potential positron emission tomography (PET) radiotracers for in vivo imaging of the allosteric binding site of the metabotropic glutamate (mGlu) receptor subtype 2 are described. The synthesized compounds proved to be potent and selective positive allosteric modulators (PAMs) of the mGlu receptor 2 (mGluR2) in a [S-35]GTP gamma S binding assay and were able to displace an mGluR2 PAM radioligand, which we had previously developed, with IC50 values in the low nanomolar range. The most promising candidates were radiolabeled and subjected to biodistribution studies and radiometabolite analysis in rats. Preliminary small-animal PET (mu PET) studies in rats indicated that [C-11]20f binds specifically and reversibly to an mGluR2 allosteric site, strongly suggesting that it is a promising candidate for PET imaging of mGluR2 in the brain.
DOI:
10.1021/jm300912k
作为产物:
描述:
3,4-二氟苯甲醚 、 正丁基锂 、 溴 、 氯化铵 在
ice 、 乙醚 、 碳酸氢钠 、 Brine 、 Sodium sulfate-III 、 silica gel 、 n-hexane-n hexane ethyl acetate 作用下,
以
四氢呋喃 为溶剂,
反应 1.75h,
以to give the title compound (0.91 g)的产率得到2-溴-3,4-二氟苯甲醚
参考文献:
名称:
FUSED HETEROCYCLIC DERIVATIVE, MEDICINAL COMPOSITION CONTAINING THE SAME, AND MEDICINAL USE THEREOF
The present invention relates to novel, selective, radiolabelled mGluR2 ligands which are useful for imaging and quantifying the metabotropic glutamate receptor mGluR2 in tissues, using positron-emission tomography (PET). The invention is also directed to compositions comprising such compounds, to processes for preparing such compounds and compositions, to the use of such compounds and compositions for imaging a tissue, cells or a host, in vitro or in vivo and to precursors of said compounds.
[EN] RADIOLABELLED mGLuR2 PET LIGANDS<br/>[FR] LIGANDS RADIOMARQUÉS POUR LA TOMOGRAPHIE PAR ÉMISSION DE POSITRONS DU MGLUR2
申请人:JANSSEN PHARMACEUTICALS INC
公开号:WO2012062752A1
公开(公告)日:2012-05-18
The present invention relates to novel, selective, radiolabelled mGluR2 ligands which are useful for imaging and quantifying the metabotropic glutamate receptor mGluR2 in tissues, using positron-emission tomography (PET). The invention is also directed to compositions comprising such compounds, to processes for preparing such compounds and compositions, to the use of such compounds and compositions for imaging a tissue, cells or a host, in vitro or in vivo and to precursors of said compounds.
[EN] METHODS FOR PREPARATION OF QUINAZOLINE DERIVATIVES<br/>[FR] PROCÉDÉS DE PRÉPARATION DE DÉRIVÉS DE QUINAZOLÉINE
申请人:ARAXES PHARMA LLC
公开号:WO2017100546A1
公开(公告)日:2017-06-15
Methods for preparing compounds having the following structure (I): (Formula (I)) or a pharmaceutically acceptable salt, stereoisomer, or tautomer thereof, wherein R1, R2a, R2b, R3a, R3b, R4a, R4b and R4c, are as defined herein are provided. Related compounds and methods for making the same are also provided.