Design, Synthesis, and Activity of a Series of Arylpyrid-3-ylmethanones as Type I Positive Allosteric Modulators of α7 Nicotinic Acetylcholine Receptors
摘要:
A series of novel arylpyrid-3-ylmethanones (7a-aa) were designed as modulators of alpha 7 nicotinic acetylcholine receptors (nAChRs). The methanones were found to be type I positive allosteric modulators (PAMs) of human alpha 7 nAChRs expressed in Xenopus ooctyes. Structure-activity relationship (SAR) studies resulted in the identification of compound 7v as a potent and efficacious type I PAM with maximum modulation of a nicotine EC5 response of 1200% and EC50 = 0.18 mu M. Compound 7z was active in reversing the effect of scopolamine in the novel object recognition (NOR) paradigm with a minimum effective ip dose of 1.0 mg/kg (2.7 mu mol/kg). This effect was blocked by the selective alpha 7 nAChR antagonist methyllycaconitine (MLA). These compounds are nAChRs that may have therapeutic value in restoring impaired sensory Alzheimer's disease. potent type I positive allosteric modulators of alpha 7 gating and cognitive deficits in schizophrenia and Alzheimer's disease.
Design, Synthesis, and Activity of a Series of Arylpyrid-3-ylmethanones as Type I Positive Allosteric Modulators of α7 Nicotinic Acetylcholine Receptors
摘要:
A series of novel arylpyrid-3-ylmethanones (7a-aa) were designed as modulators of alpha 7 nicotinic acetylcholine receptors (nAChRs). The methanones were found to be type I positive allosteric modulators (PAMs) of human alpha 7 nAChRs expressed in Xenopus ooctyes. Structure-activity relationship (SAR) studies resulted in the identification of compound 7v as a potent and efficacious type I PAM with maximum modulation of a nicotine EC5 response of 1200% and EC50 = 0.18 mu M. Compound 7z was active in reversing the effect of scopolamine in the novel object recognition (NOR) paradigm with a minimum effective ip dose of 1.0 mg/kg (2.7 mu mol/kg). This effect was blocked by the selective alpha 7 nAChR antagonist methyllycaconitine (MLA). These compounds are nAChRs that may have therapeutic value in restoring impaired sensory Alzheimer's disease. potent type I positive allosteric modulators of alpha 7 gating and cognitive deficits in schizophrenia and Alzheimer's disease.
New Gilman-type lithium cuprate from a copper(II) salt: synthesis and deprotonative cupration of aromatics
作者:Tan Tai Nguyen、Floris Chevallier、Viatcheslav Jouikov、Florence Mongin
DOI:10.1016/j.tetlet.2009.09.100
日期:2009.12
including heterocycles (anisole, 1,4-dimethoxybenzene, thiophene, furan, 2-fluoropyridine, 2-chloropyridine, 2-bromopyridine, and 2,4-dimethoxypyrimidine) was realized in tetrahydrofuran at room temperature using the Gilman-type amido-cuprate (TMP)2CuLi in situ prepared from CuCl2·TMEDA through successive addition of 1 equiv of butyllithium and 2 equiv of LiTMP. The intermediate lithium (hetero)arylcuprates
Deprotonative Metalation of Aromatic Compounds by Using an Amino-Based Lithium Cuprate
作者:Tan Tai Nguyen、Nada Marquise、Floris Chevallier、Florence Mongin
DOI:10.1002/chem.201100990
日期:2011.9.5
employed to attempt the interception of the generated aryl cuprates, aroyl chlorides, iodomethane, and diphenyl disulfide efficiently reacted. In addition, different oxidative agents were identified to afford symmetrical biaryls. Finally, palladium‐catalyzed coupling with arylhalides was optimized and allowed the synthesis of different arylderivatives in medium to good yields.
Br/Mg-exchange reaction using reagents of the general formula R2Mg (R = sBu, Mes). Highly sensitive functional groups, such as triazene or nitro, are tolerated in these exchange reactions, enabling the synthesis of various functionalized (hetero)arene and alkene derivatives after quenching with several electrophiles including allyl bromides, acylchlorides, aldehydes, ketones, and aryl iodides.
在 –78 °C 和 25 °C 之间,通过 I/Mg 或 Br/Mg 交换反应,在甲苯中,在 10 到 120 分钟内,使用以下试剂制备各种多官能化二(杂)芳基和二烯基镁试剂通式 R2Mg (R = sBu, Mes)。在这些交换反应中可以耐受三氮烯或硝基等高度敏感的官能团,在用烯丙基溴、酰氯、醛、酮和芳基碘等多种亲电试剂淬灭后,可以合成各种功能化的(杂)芳烃和烯烃衍生物.