Flexible N-methyl-4-phenyl-1,2,3,6-tetrahydropyridine analog: synthesis and monoamine oxidase catalyzed bioactivation
摘要:
Eighteen analogues of N-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) were synthesized and evaluated as substrates of monoamine oxidase. In general, the flexible analogues, characterized by the presence of a methylene (or ethylene) bridge between the aryl/heteroaryl and tetrahydropyridyl moieties, were better substrates of the enzyme than the conformationally restricted MPTP. It is suggested that the increased oxidative activity of these flexible analogues reflects enhanced binding due to the ability of the C-4-aryl/heteroaryl substituent to gain access to a hydrophobic pocket within the substrate binding site.
INHIBITION OF RAF KINASE USING SUBSTITUTED HETEROCYCLIC UREAS
申请人:Dumas Jacques
公开号:US20070244120A1
公开(公告)日:2007-10-18
Methods of treating tumors mediated by raf kinase, with substituted urea compounds, and such compounds per se.
治疗由raf激酶介导的肿瘤的方法,包括使用取代脲化合物,以及这些化合物本身。
Metal-Free Synthesis of C-4 Substituted Pyridine Derivatives Using Pyridine-boryl Radicals via a Radical Addition/Coupling Mechanism: A Combined Computational and Experimental Study
作者:Guoqiang Wang、Jia Cao、Liuzhou Gao、Wenxin Chen、Wenhao Huang、Xu Cheng、Shuhua Li
DOI:10.1021/jacs.7b00823
日期:2017.3.15
that the pyridine-boryl radical generated in situ using 4-cyanopyridine and bis(pinacolato)diboron could be used as a bifunctional "reagent", which serves as not only a pyridine precursor but also a borylradical. With the unique reactivity of such radicals, 4-substituted pyridine derivatives could be synthesized usingα,β-unsaturated ketones and 4-cyanopyridine via a novel radical addition/C-C coupling
A short, scalable and environmentally benignsynthesis of 2- and 4-substitutedbenzylpiperidines has been developed. The method is based on the temperature-programmed consecutive deoxygenation and heteroaromatic ring saturation of aryl(pyridin-2-yl)- and aryl(pyridin-4-yl)methanols and aryl(pyridin-4-yl)methanones in the presence of Pd/C catalyst. The crucial roles of the temperature, the acidity and
and imines with cyanopyridines. Hantzschesters serve as reductants in this process, eliminating the need for transition-metals or photosensitizers. The method demonstrates extensive compatibility and finds utility in the late-stage functionalization of both natural and pharmaceutical products, offering a sustainable pathway for the diversification of chemical compounds.