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.
An electroreductive arylation reaction of aliphatic and aromaticaldehydes as well as ketones with electro-deficient (hetero)arenes is described. A variety of cyano(hetero)arenes and carbonyl compounds, especially aliphatic aldehydes, have been examined, providing secondary and tertiary alcohols in moderate to good yields. Mechanistic studies, including cyclic voltammetry (CV), electron paramagnetic
Benzylic C–H heteroarylation of <i>N</i>-(benzyloxy)phthalimides with cyanopyridines enabled by photoredox 1,2-hydrogen atom transfer
作者:Long-Jin Zhong、Hong-Yu Wang、Xuan-Hui Ouyang、Jin-Heng Li、De-Lie An
DOI:10.1039/d0cc03619f
日期:——
A visible light initiated α-C(sp3)–H arylation of N-(benzyloxy)phthalimides with cyanopyridines for the construction of highly valuable pyridinyl-containing diarylmethanols, including bioactive motif-based analogues, is reported. This method enables arylation of the C(sp3)–H bonds adjacent to an oxygen atom through alkoxy radical formation by O–N bond cleavage, 1,2-hydrogen atom transfer (HAT), arylation
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
Compounds of the Formula I ##STR1## wherein R.sup.1 represents phenyl, or phenyl substituted by one, or more substituents selected from the group consisting of halogen, C.sub.1-7 -alkyl, and C.sub.1-7 -alkoxy, R.sup.2 represents furanyl, thienyl, pyridyl or pyrrolyl ortho substituted with C.sub.1-7 -alkyl or halogen and wherein R.sup.3 represents 3-carboxypiperidin-1-yl, 3-carboxy-1,2,5,6-tetrahydropyridin-1-yl or 3-carboxymethyl-pyrrolidin-1-yl, pharmaceutical compositions containing effective amounts of a compound of formula I and treatment of central nervous system ailments by administering a compound of formula I.
The RuPHOX-Ru catalyzedasymmetrichydrogenation of diaryl ketones has been established, providing the corresponding chiral diaryl methanols in up to 99% yield and 99% ee. The protocol could be performed on a gram-scale with a relatively low catalyst loading (2000 S/C) and the resulting products allow for several useful transformations, in particular for the synthesis of chiral drugs, such as, (S)-Orphenadrine
已经建立了 RuPHOX-Ru 催化的二芳基酮不对称氢化,以高达 99% 的产率和 99% ee 提供相应的手性二芳基甲醇。该方案可以在催化剂负载量相对较低 (2000 S/C) 的克规模上进行,所得产品可进行多种有用的转化,特别是用于手性药物的合成,例如 ( S ) -Orphenadrine和( S )-新苯二甲酸。氘标记和对照实验表明,RuPHOX-Ru 催化的不对称氢化完全以 H 2作为唯一氢源进行氢化。