V. V. Grigor’ev

Modification of biologically active amides and amines with fluoro-containing heterocycles 11. Tetrahydrocarbazoles modified with 2-(5-fluoropyridin-3-yl)ethyl fragment

A method for the modification of tetrahydrocarbazoles with the 2-(5-fluoropyridin-3-yl)ethyl fragment was suggest, which consists in the reaction of 5-fluoro-3-vinylpyridine with tetrahydrocarbazoles under conditions of fluoride ion catalysis and leads to the earlier unknown 9-[2-(5-fluoropyridin-3-yl)ethyl]-2,3,4,9-tetrahydro-1H-carbazoles. Method of radioligand binding was used to study the influence of compounds synthesized on neuronal NMDA-receptors.

Molecular design of multitarget neuroprotectors 3. Synthesis and bioactivity of tetrahydrocarbazole—aminoadamantane conjugates

A synthetic approach to the design of new multitarget neuroprotectors consisting in combination of the tetrahydrocarbazole and aminoadamantane pharmacophore fragments through a 2-hydroxypropylene spacer upon the reaction of 9-oxiranylmethyl-2,3,4,9-tetrahydro-1H-carbazoles and aminoadamantanes, which affords 1-(adamantan-1-ylamino)-3-(1,2,3,4-tetrahydrocarbazol-9-yl)-propan-2-ols, is proposed. The effect of the synthesized compounds on the neuronal NMDA receptors and the functional characteristics of rat liver mitochondria was studied.

Modification of biologically active amides and amines by fluoro-containing heterocycles 10. γ-Carbolines modified by 2-trifluoromethylimidazo-[1,2-a]pyridin-3-ylpropionamide fragments

An approach to the modification of biologically active γ-carbolines by the 2-trifluoromethylimidazo[1,2-a]pyridin-3-ylpropionamide fragments was suggested, which consisted of the reaction of N-methyl-N-(2-trifluoromethylimidazo[1,2-a]pyridin-3-yl)prop-2-enamides with γ-carbolines in the presence of catalytic amounts of cesium fluoride. Method of radioligand binding was used to study effects of the synthesized 3-(1,2,3,4-tetrahydro-5H-pyrido[4,3-b]-indol-5-yl)-N-methyl-N-[2-(trifluoromethyl)imidazo-[1,2-a]pyridin-3-yl]propanamides on the neuronal NMDA-receptors.

Molecular design of multitarget neuroprotectors 2. Synthesis and bioactivity of carbazole—γ-carboline conjugates

Earlier unknown conjugates of carbazoles and γ-carbolines were obtained by the reaction of 3,6-substituted 9-oxiranylmethylcarbazoles and 2,8-substituted 2,3,4,5-tetrahydro-1H-pyrido-[4,3]indoles. The effects of synthesized 1-(9H-carbazol-9-yl)-3-(1,2,3,4-tetrahydro-5H-pyrido-[4,3-b]indol-5-yl)propan-2-ones and their hydrochlorides on neuronal NMDA receptors, polymerization of tubulin to form microtubules, and functional characteristics of rat liver mitochondria were studied.

Molecular construction of multitarget neuroprotectors 1. Synthesis and biological activity of conjugates of substituted indoles and bis(dimethylamino)phenothiazine

Synthetic strategy to access new multitarget neuroprotectors by conjugation of pharma-cophoric indole and bis(dimethylamino)phenothiazine moieties via 1-oxopropylene spacer was developed. The transformation was achieved by the cesium fluoride-catalyzed reaction of cycloalkaneindoles with 1-propenone. Effect of the synthesized compounds on neuronal NMDA receptors was evaluated by radioligand binding assay.

Physiologically active bis(dialkylamides) of phosphoryl-substituted α,ω-dicarboxylic acids

Bis(dialkylamides) of phosphoryl-substituted α,ω-dicarboxylic acids were synthesized and their biological activity was studied.

Synthesis and AMPA-receptor modulating activity of benzodioxanecarboxylic and piperonylic acid derivatives

A series of amides of benzodioxane-6-carboxylic and piperonylic acids have been synthesized. Biological studies showed that some of the synthesized compounds influence the central nervous system (in particular, AMPA receptors).

Synthesis and biological activity of amination products of the alkaloid securinine

A method for stereospecific synthesis of allomargaritarin and other amination products of the natural alkaloid securinine was developed. Stereoselective nucleophilic addition of an amine at the double bond of the azobicyclooctane moiety of securinin was achieved by using ytterbium triflate as the catalyst. The biological activity of securining caused by adding pharmacophores to the molecule was shown to change experimentally.

Effects of delta sleep-inducing peptide on pre- and postsynaptic glutamate and postsynaptic GABA receptors in neurons of the cortex, hippocampus, and cerebellum in rats.

We studied the effect of delta sleep-inducing peptide on GABA receptors of hippocampal and cerebellar neurons in rats. It was shown that delta sleep-inducing peptide considerably and dose-dependently potentiates GABA-activated currents in these neurons and blocks NMDA-activated potentiation in cortical and hippocampal neurons. The peptide modulates activity of presynaptic NMDA receptors, which is seen from changes in 45Ca2+ uptake into synaptosomes of the brain cortex after uptake stimulation with glutamate and NMDA.

Cycloalkaneindoles with 2-trifluoromethylimidazo[1,2- a ]pyridin-6-yl fragment

Modification of biologically active cycloalkaneindoles by incorporation of a 2-trifluoromethylimidazo[1,2-a]pyridin-6-yl fragment has been proposed and performed via the interaction with 3-fluoro-2-trifluoromethylimidazo[1,2-a]pyridines in the presence of potassium hydroxide. The action of the prepared compounds on neuronal NMDA receptors has been studied by means of radioligand binding.