Synthesis and spectral properties of unsymmetrical benzoporphyrins containing phenoxy groups or quinoxaline fragments
Condensation of phthalimide and 4-tert-butylphthalimide with zinc(II) acetate gave 3-(3-oxo-2,3-dihydro-1H-isoindol-1-ylidenemethyl)-1H-isoindol-1-one and 5-tert-butyl-3-(5-tert-butyl-3-oxo-2,3-dihydro-1H-isoindol-1-ylidenemethyl) -1H-isoindol-1-one, resp
4-Tetraphenyl- and 4-tetraphenoxy-substituted meso- tetraphenyltetrabenzoporphyrins. Synthesis and spectral properties
The reactions of 4-phenyl- and 4-phenoxyphthalimide with benzoic acid in the presence of zinc(II) oxide gave zinc complexes of meso-tetraphenyltetra(4- phenylbenzo)porphyrin and meso-tetraphenyltetra-(4-phenoxybenzo)porphyrin, respectively, and the latter
Preparation method for substituting phthalide compound and intermediate of preparation method
The invention discloses a preparation method for substituting a phthalide compound and an intermediate of the preparation method. The preparation method for substituting the phthalide compound comprises the following step that in water, the compound B is
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Paragraph 0157; 0158; 0160
(2017/10/07)
Transition metal-free 1,3-dimethylimidazolium hydrogen carbonate catalyzed hydration of organonitriles to amides
An efficient hydration of organonitriles to the corresponding amides was accomplished using 1,3-dimethylimidazolium hydrogen carbonate as an organocatalyst. The developed catalytic method was also applicable for the synthesis of metal phthalocyanines.
Inhibition of monoamine oxidase by C5-substituted phthalimide analogues
Literature reports that isatin as well as C5- and C6-substituted isatin analogues are reversible inhibitors of human monoamine oxidase (MAO) A and B. In general, C5- and C6-substitution of isatin leads to enhanced binding affinity to both MAO isozymes compared to isatin and in most instances result in selective binding to the MAO-B isoform. Crystallographic and modeling studies suggest that the isatin ring binds to the substrate cavities of MAO-A and -B and is stabilized by hydrogen bond interactions between the NH and the C2 carbonyl oxygen of the dioxoindolyl moiety and water molecules present in the substrate cavities of MAO-A and -B. Based on these observations and the close structural resemblances between isatin and its phthalimide isomer, a series of phthalimide analogues were synthesized and evaluated as MAO inhibitors. While phthalimide and N-aryl-substituted phthalimides were found to be weak MAO inhibitors, phthalimide homologues containing C5 substituents were potent reversible inhibitors of recombinant human MAO-B with IC50 values ranging from 0.007 to 2.5 μM and moderately potent reversible inhibitors of recombinant human MAO-A with IC50 values ranging from 0.22 to 9.0 μM. By employing molecular docking the importance of hydrogen bonding between the active sites of MAO-A and -B and the phthalimide inhibitors are highlighted.
Manley-King, Clarina I.,Bergh, Jacobus J.,Petzer, Jacobus P.
experimental part
p. 4829 - 4840
(2011/09/20)
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