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  1. No Access

    Article

    Closure of the pyridine ring in the combes quinoline synthesis (Review)

    Closure of the pyridine ring in the Combes quinoline synthesis occurs by a type of intramolecular electrophilic substitution. With two free ortho positions the direction of ring formation depends both on the i...

    S. A. Yamashkin, L. G. Yudin, A. N. Kost in Chemistry of Heterocyclic Compounds (1992)

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    Article

    Synthesis of benzo(aminomethyl)indoles

    The benzene ring in indoles has been aminomethylated in high yield by reaction with methylolphthalimide followed by hydrazinolysis of the phthalimidomethyl derivatives. In the hydrazinolysis of one of the phth...

    A. Muminov, L. G. Yudin, E. Ya. Zinchenko… in Chemistry of Heterocyclic Compounds (1985)

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    Article

    Synthesis and reactions of 2-amino-3-(ω-chloroaklyl)indoles

    The reaction of N-methyl-N-phenyl-N′-(ω-chloro)acylhydrazines with POC13 yields derivatives of 2-amino-3-(ω)-chloroalkyl) indoles. Hydrazides of β-chloropropionic acid were found to exist as the cyclic quaternary...

    Yu. N. Portnov, V. G. Zabrodnyaya, V. G. Voronin… in Chemistry of Heterocyclic Compounds (1983)

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    Article

    Recyclization of 2-benzylpyridinium salts to 2-aminobiphenyls

    Under the influence of aqueous solutions of alkylammonium sulfites, substituted 2-benzylpyridinium salts undergo rearrangement to 2-aminobiphenyls. The competitive processes that occur during rearrangement of ...

    A. N. Kost, A. Fadda, R. S. Sagitullin, S. P. Gromov… in Chemistry of Heterocyclic Compounds (1983)

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    Article

    Preparation of opticaly active 3-(1-methyl-1-phenylpropyl)indole and investigation of its chiral-optical properties

    Optically active 3-(1-methyl-1-phenylpropyl)indole was obtained by dehydrogenation of the resolved [by means of (L)-10-camphorsulfonic acid] 3-(1-methyl-1-phenylpropyl)indoline. The chiral-optical properties o...

    A. N. Kost, N. N. Romanova, V. A. Budylin… in Chemistry of Heterocyclic Compounds (1983)

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    Article

    Synthesis of pyrroloquinolones

    The condensation of 5- and 6-aminoindoles with diketene and acetoacetic ester was realized. A convenient method for the synthesis of pyrrolo[3,2-f]- and pyrrolo-[2,3-f]quinol-9-ones from 5- and 6-aminoindoles ...

    S. A. Yamashkin, L. G. Yudin, A. N. Kost in Chemistry of Heterocyclic Compounds (1983)

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    Article

    Recyclization of 2-(2-phenylethyl)pyridinium salts

    Under the influence of aqueous solutions of alkylammonium sulfites 2-(2-phenyl) ethyl)pyridinium salts undergo recyclization to 2-benzyl-N-alkylanilines. The effect of structural factors on the transamination,...

    L. G. Yudin, A. N. Rumyantsev, R. S. Sagitullin… in Chemistry of Heterocyclic Compounds (1983)

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    Article

    Investigation of the recyclization of quaternary salts of papaverine and its structural analogs

    The rearrangement of salts of the alkaloid papaverine and its structural analogs under the influence of nucleophilic agents was studied. It is shown that when an alcohol solution of an alkylamine is used as th...

    V. I. Terenin, L. G. Yudin, R. S. Sagitullin… in Chemistry of Heterocyclic Compounds (1983)

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    Article

    Three-dimensional structure of 3-acylindoles

    On the basis of a comparison of the experimental dipole moments with the calculated values, as well as data from the UV, IR, and PMR spectra, it is shown that 3-acylindoles exist in the form of equilibrium mix...

    A. N. Kost, V. I. Minkin, V. A. Budylin… in Chemistry of Heterocyclic Compounds (1982)

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    Article

    Isomerizational recyclizat10n of pyridylethylated cyclanones. A new method for the synthesis of substituted polyhydroacridines and their analogs

    Mixtures of cis and trans isomers of 1,2,3,4,9,10,9a,10a-octahydroacridines are formed in the recyclization of quaternary salts of pyridylethylated alicyclic ketones. The 1,2,3,4,9,10-hexahydro-1-acridone skel...

    P. B. Terent'ev, Le Ty Chin, Yu. G. Bundel'… in Chemistry of Heterocyclic Compounds (1982)

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    Article

    Intramolecular cyclization of N-phthalyl-β-aryl-β-alanine phenylhydrazide

    The reaction of N-phthalyl-β-aryl-β-alanine N′-methyl-N′-phenylhydrazides with phosphorus oxychloride (at∼80 °C) is accompanied by further transformations of the initially formed 2-aminoindole derivatives and ...

    Yu. N. Portnov, V. G. Zabrodnyaya, V. G. Voronin… in Chemistry of Heterocyclic Compounds (1982)

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    Anhydro bases of the pyridine series (review)

    Methods for the preparation of anhydro bases of the pyridine series by deprotonation of the corresponding quaternary salts under the influence of bases, as well as by the direct reaction of quaternary pyridini...

    T. V. Stupnikova, B. P. Zemskii, R. S. Sagitullin… in Chemistry of Heterocyclic Compounds (1982)

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    Article

    Recyclization of 2-(2-phenylethyl)pyridinium alkiodides to o-alkylaminodiphenylmethanes

    A. N. Kost, L. G. Yudin, A. N. Rumyantsev… in Chemistry of Heterocyclic Compounds (1982)

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    Article

    Peculiarities of nucleophilic substitution in indolyliodonium salts

    3-Indolylphenyliodonium trifluoroacetate reacts with ammonium bromide and lithium chloride and bromide to give 3-haloindoles. The reaction with ammonium chloride and tetrabutylammonium chloride leads to a mixt...

    V. A. Budylin, M. S. Ermolenko, F. A. Chugtai… in Chemistry of Heterocyclic Compounds (1981)

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    Article

    Reaction of 3-indolylphenyliodonium betaine with electrophilic agents

    3-Indolylphenyliodonium chloride and bromide, respectively, were obtained by the action of hydrochloric and hydrobromic acids on 3-indolylphenyliodonium betaine. Pyrolysis of the chloride leads to a mixture of...

    V. A. Budylin, M. S. Ermolenko, F. A. Chugtai… in Chemistry of Heterocyclic Compounds (1981)

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    Article

    Reaction of indoles with trifluoroacetic acid

    3-Trifluoroacetyl indoles are formed by the action of trifluoroacetic acid on indole-2-carboxylic acid and its benzo-substituted derivatives. When unsubstituted indole is refluxed with trifluoroacetic acid, it...

    A. N. Kost, V. A. Budylin, N. N. Romanova… in Chemistry of Heterocyclic Compounds (1981)

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    Article

    Use of kovats indices for identifying sex pheromones

    The gas-chromatographic retention indices of a number of unsaturated alcohols and their acetates and unsaturated expoxides on two phases of different polarities have been determined.The tabular results obtaine...

    S. F. Nedopekina, B. G. Kovalev, A. N. Kost in Chemistry of Natural Compounds (1981)

  18. No Access

    Article

    Isomerization recyclization of pyridylethylated ketones. New method for the synthesis of quinoline derivatives

    Quinolines and 1,2,3,4-tetrahydroquinolines were obtained by heating quaternary salts of pyridylethylated ketones with sulfites of primary amines in an ampul. 1-Tetralone or substituted 2-tetralones are formed...

    P. B. Terent'ev, Lieh T'i Ch'in, A. N. Kost in Chemistry of Heterocyclic Compounds (1981)

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    Article

    Mass-spectral behavior of substituted 2-alkylaminobenzoxazoles and 3-methyl-2-alkyliminobenzoxazolines

    Schemes that reflect the peculiarities of each of the investigated groups of compounds and make it possible to distinguish the amino and imino forms are given on the basis of a study of the dissociative ioniza...

    P. B. Terent'ev, V. A. Shmorgunov, K. Davidkov… in Chemistry of Heterocyclic Compounds (1981)

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    Article

    Reaction of phenylhydrazides of N-acyl-β-phenyl-β-alanine with phosphorus oxychloride

    The reaction of N′-methyl-N′-phenylhydrazides of N-acyl-β-phenyl-β-alanine with phosphorus oxychloride is accompanied by cleavage of the C-N bond in the intermediately formed 2-aminoindole derivative and, afte...

    V. G. Zabrodnyaya, Yu. N. Portnov, V. G. Voronin… in Chemistry of Heterocyclic Compounds (1980)

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