Imaging Evaluation of 5HT2C Agonists, [11C]WAY-163909 and [11C]Vabicaserin, Formed by Pictet–Spengler Cyclization
摘要:
The serotonin subtype 2C (5HT(2C)) receptor is an emerging and promising drug target to treat several disorders of the human central nervous system. In this current report, two potent and selective 5HT(2C) full agonists, WAY-163909 (2) and vabicaserin (3), were radiolabeled with carbon-11 via Pictet-Spengler cyclization with [C-11]formaldehyde and used in positron emission tomography (PET) imaging. Reaction conditions were optimized to exclude the major source of isotope dilution caused by the previously unknown breakdown of N,N-dimethylformamide (DMF) to formaldehyde at high temperature under mildly acid conditions. In vivo PET imaging was utilized to evaluate the pharmacokinetics and distribution of the carbon-11 labeled 5HT(2C) agonists. Both radiolabeled molecules exhibit high blood-brain barrier (BBB) penetration and nonspecific binding, which was unaltered by preadministration of the unlabeled agonist. Our work demonstrates that Pictet-Spengler cyclization can be used to label drugs with carbon-11 to study their pharmacokinetics and for evaluation as PET radiotracers.
Imaging Evaluation of 5HT2C Agonists, [11C]WAY-163909 and [11C]Vabicaserin, Formed by Pictet–Spengler Cyclization
摘要:
The serotonin subtype 2C (5HT(2C)) receptor is an emerging and promising drug target to treat several disorders of the human central nervous system. In this current report, two potent and selective 5HT(2C) full agonists, WAY-163909 (2) and vabicaserin (3), were radiolabeled with carbon-11 via Pictet-Spengler cyclization with [C-11]formaldehyde and used in positron emission tomography (PET) imaging. Reaction conditions were optimized to exclude the major source of isotope dilution caused by the previously unknown breakdown of N,N-dimethylformamide (DMF) to formaldehyde at high temperature under mildly acid conditions. In vivo PET imaging was utilized to evaluate the pharmacokinetics and distribution of the carbon-11 labeled 5HT(2C) agonists. Both radiolabeled molecules exhibit high blood-brain barrier (BBB) penetration and nonspecific binding, which was unaltered by preadministration of the unlabeled agonist. Our work demonstrates that Pictet-Spengler cyclization can be used to label drugs with carbon-11 to study their pharmacokinetics and for evaluation as PET radiotracers.
aerobic oxidative dehydrogenation of N-heterocycles were examined in detail. Many tetrahydroquinoline derivatives and a broad range of other N-heterocycles could be tolerated by the catalytic system using a biomass-derived solvent as a reaction medium. Newly generated mixed crystal phases, noticeably enhanced surface areas and labile lattice oxygen of the OMS-2-based nanocomposite catalysts might contribute
A simple route to C-functionalised azaxylylenes and diazaxylylenes
作者:Colin W. G. Fishwick、Richard C. Storr、Paul W. Manley
DOI:10.1039/c39840001304
日期:——
o-Lithiation of t-butoxycarbonylaniline and 4-t-butoxycarbonylaminopyridine followed by reaction with aldehydes gives t-butoxycarbonylamino alcohols which are converted into azaxylylenes and diazaxylylenes on flash pyrolysis.
Amorphous manganese oxide doped by Na+ ion (Na-AMO) was successfully prepared and found to be an efficient heterogeneous catalyst in aerobicoxidative dehydrogenation of N-heterocycles, cooperate with catachol. Na-AMO was fully characterized by XRD, XPS BET H2-TPR, CO2-TPD FT-IR, TEM, SEM and had rich amounts of surface absorbed active oxygen species which are responsible for superior catalytic performance
成功制备了Na +离子掺杂的无定形锰氧化物(Na-AMO),发现它是N-杂环好氧氧化脱氢的有效多相催化剂,与催化裂化反应配合使用。Na-AMO通过XRD,XPS BET H 2 -TPR,CO 2 -TPD FT-IR,TEM,SEM进行了全面表征,并具有大量的表面吸收活性氧,这些都具有优异的催化性能。Na-AMO和邻苯二酚之间的协同相互作用使催化系统高效且具有耐受性,在温和条件下,该系统可提供各种N-杂环化合物,收率好至极佳。
Diazepinoquinolines, synthesis thereof, and intermediates thereto
申请人:Megati Sreenivasulu
公开号:US20070027142A1
公开(公告)日:2007-02-01
The present invention relates to methods for synthesizing compounds useful as 5HT
2C
agonists or partial agonists, derivatives thereof, and to intermediates thereto.
HETEROCYCLIC-SUBSTITUTED PIPERIDINE COMPOUNDS AND THE USES THEREOF
申请人:Brown Kevin C.
公开号:US20100022519A1
公开(公告)日:2010-01-28
The invention relates to Heterocyclic-Substituted Piperidine Compounds, compositions comprising an effective amount of a Heterocyclic-Substituted Piperidine Compound and methods to treat or prevent a condition, such as pain, comprising administering to an animal in need thereof an effective amount of a Heterocyclic-Substituted Piperidine Compound.