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Article
Spectroscopic investigation of conformational equilibrium in N-chloropiperidine
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Article
Vibrational spectra of N-substituted pyrrolidines
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Article
The structure of ulopterol
A new coumarin C15H18O5 with mp 141.5–142.5° C (from benzene) has been isolated from the roots and fruit ofPrangos uloptera D. C., and it has been called “ulopterol.” On the basis of UV, IR, NMR, and mass spectra...
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Article
Pranferin — A new coumarin from the roots of Prangos ferulacea
From the roots ofPrangos ferulacea (L) Lindl. a new coumarin has been isolated, C18H22O5, mp 167.5–169°C (from benzene) [α]16 D ± 0° (c 3.88; chloroform), and it has been called pranferin.
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Article
α-(3-Indolyl)-β-hydroxyethylamine and its derivatives
The reduction of oximes of 3-hydroxyacetylindole, 3-benzyloxyacetylindole, and 3-ethoxy-acetylindole (mixtures of syn and anti isomers) gave α-(3-indolyl-β-hydroxyethylamine, α-(3-indolyl)-β-benzyloxyethylamine, ...
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Article
The structure of sibirosamine — A new amino sugar from the antibiotic sibiromycin
1. It has been shown that the antitumoral antibiotic sibiromycin is a glycoside of a new amino sugar which has been called sibirosamine.
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Article
Effect of catalysts on the Fischer cyclization of cyclohexanone 4-pyridylhydrazone
The peculiarities of the Fischer cyclization of cyclohexanone 4-pyridylhydrazone and the formation of 5,6,7,8-tetrahydro-γ-carboline, 4-aminopyridine, 4-ethylaminopyridine, 4-pyridone, and 2-(4-pyridyl)-3,3a,4,5,...
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Article
Structure of the product of the acid hydrolysis of sibiromycin
1. The acid hydrolysis of the dimethyl ether of the “product of acid hydrolysis” of the antitumoral antibiotic sibiromycin forms 4-(prop-1-enyl)pyrrole-2-carboxaldehyde and 3,6-dimethoxy-5-methyl-anthranilic a...
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Article
Anomalous transformations of acetaldehyde (2,6-dichloro-4-pyridyl)hydrazone under the conditions of the Fischer reaction
Instead of the usual indolization, when acetaldehyde (2,6-dichloro-4-pyridyl)hydrazone is heated with zinc chloride under the conditions of the Fischer reaction one observes the formation of acetone (2,6-dichl...
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Article
Lactam acetals
The acylation of the diethyl acetal of N-methylpiperidin-2-one with benzoyl chloride has been studied. It gives a mixture of 1-methylpiperidin-2-one, ethyl benzoate, 3-benzoyl-1-methylpiperidin-2-one, 3-(benzo...
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Article
Steroids
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Article
Lactam acetals
Derivatives of pyrrolo-, pyrido-, and azepino[2,3-b]quinolones were synthesized by condensation of N-methylbutyro-, N-methylvalero-, and N-methylcaprolactam diethyl acetals with ethyl anthranilate. The corresp...
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Article
Mass spectra of derivatives of imidazo[2,1-b] thiazole and thiazolo[3,2-a]benzimidazole
The mass spectra of 6-phenylimidazo[2,1-b]thiazole, thiazolo[3,2-a]benzimidazole, and a number of thiazole-ring-substituted derivatives were investigated. The fragmentation of both groups of compounds commence...
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Article
Mass spectra of imidazo[2,1-b]thiazole and thiazolo[3,2-f]xanthene derivatives
The general principles of the mass-spectrometric disintegration of imidazo [2,1-b]thiazole and thiazolo[3,2-f]xanthene derivatives were established, and the characteristic fragments were identified. Disintegratio...
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Article
Lactam acetals
It is shown in the case of the reaction of N-methylbutyro-, N-methylvalero-, and N-methylcaprolactam diethylacetals with benzyl cyanide that the five-membered acetal is the most reactive in the reaction with c...
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Article
Synthesis of condensed benzofurans by reaction of lactam acetals with benzoquinone
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Article
Indole derivatives.
Depending on the presence of ring substituents, nitrovinylindole reacts with sodium thiosulfate to give nitro sulfides or nitro sulfonic acids.
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Article
Mass spectra of pyrrolo [1,2-a]benzimidazole and imidazo[1,2-a]benzimidazole derivatives
The closeness of the electronic structures of the ions formed in the first act of disintegration of the ions is responsible for the monotypic character of the subsequent fragmentation of pyrrolo[1,2-a]benzimid...
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Article
Reactions of 6-methoxy-1,2,3,4-tetrahydro-β-carbolin-1-ones and their dichlorophosphoryl-substituted derivatives with acetic anhydride
2-Benzyl-, 9-benzyl-, and 2,9-dibenzyl-6-methoxy-1,2,3,4-tetrahydro-β-carbolin-1-ones were synthesized. It is shown that 6-methoxy-1,2,3,4-tetrahydro-β-carbolin-1-one and its 2- and 9-monobenzyl-substituted de...
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Article
Research in the imidazole series
It was established on the basis of an investigation of the mass spectra that in the reaction of 2-chlorobenzimidazoles with unsymmetrical olefin oxides and secondary β -halo alcohols, of the two possible isomers ...
