Synthesis and activity of substituted heteroaromatics as positive allosteric modulators for α4β2α5 nicotinic acetylcholine receptors
作者:Zhuang Jin、Pasha Khan、Youseung Shin、Jingyi Wang、Li Lin、Michael D. Cameron、Jon M. Lindstrom、Paul J. Kenny、Theodore M. Kamenecka
DOI:10.1016/j.bmcl.2013.11.049
日期:2014.1
The design and synthesis of a series of substituted heteroaromatic α4β2α5 positive allosteric modulators is reported. The optimization and development of the heteroaromatic series was carried out from NS9283, and several potent analogues, such as 3-(5-(pyridin-3-yl)-2H-tetrazol-2-yl)benzonitrile (5k) and 3,3′-(2H-tetrazole-2,5-diyl)dipyridine (12h) with good in vitro efficacy were discovered.
The copper-catalyzed azide alkyne cycloaddition (CuAAC) is a highly effective method for the selective incorporation of deuterium atom into the C-5 position of the 1,2,3-triazole structure. Reactions of alkynes and azides can be conveniently carried out in a biphasic medium of CH2Cl2/D2O, using the CuSO4/Na ascorbate system. The mildness of the method renders it applicable to substrates of relatively high complexity, such as nucleosides. Good yields and high levels of deuterium incorporation were observed. A reaction conducted in equimolar H2O and D2O showed 2.7 times greater incorporation of hydrogen atom as compared to deuterium. This is consistent with the H+ and D+ ion concentrations in H2O and D2O, respectively. With appropriately deuterated precursors, partially to fully deuterated triazoles were assembled where the final deuterium atom was incorporated in the triazole-forming step.
[EN] TRIAZOLE DERIVATIVES AND THEIR USE AS NICOTINIC ACETYLCHOLINE RECEPTOR MODULATORS<br/>[FR] DÉRIVÉS DE TRIAZOLE ET LEUR UTILISATION EN TANT QUE MODULATEURS DE RÉCEPTEUR NICOTINIQUE D'ACÉTYLCHOLINE
申请人:NEUROSEARCH AS
公开号:WO2010026134A1
公开(公告)日:2010-03-11
This invention relates to novel triazole derivatives, which are found to be modulators of the nicotinic acetylcholine receptors. Due to their pharmacological profile the compounds of the invention may be useful for the treatment of diseases or disorders as diverse as those related to the cholinergic system of the central nervous system (CNS), the peripheral nervous system (PNS), diseases or disorders related to smooth muscle contraction, endocrine diseases or disorders, diseases or disorders related to neuro-degeneration, diseases or disorders related to inflammation, pain, and withdrawal symptoms caused by the termination of abuse of chemical substances.