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Relevant bibliographies by topics / XXXXIX

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Academic literature on the topic 'XXXXIX'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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Journal articles on the topic "XXXXIX"

1

Protiva, Miroslav, Jiří Jílek, Miroslav Rajšner, et al. "Fluorinated tricyclic neuroleptics with prolonged action: derivatives and analogues of 2-(4-(7-fluoro-2-isopropyl-10,11-dihydrodibenzo[b,f]thiepin-11-yl)-piperazine-1-yl)ethanol." Collection of Czechoslovak Chemical Communications 52, no. 7 (1987): 1811–33. http://dx.doi.org/10.1135/cccc19871811.

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The preparation of 4-fluoro-2-nitrobenzonitrile (V), an intermediate in the synthesis of the title compound I, from 4-fluoro-2-nitroaniline via 5-fluoro-2-iodonitrobenzene (VII) was elaborated. Syntheses of 1,1,1,3,3,3-hexadeutero-2-propyl (XX) and 1,3,4-trideutero (XXVIII) analogues of compound I from hexadeuteroacetone, and pentadeuterobromobenzene, respectively, were carried out. Compound I was esterified with acetic anhydride, decanoic acid and 3,4,5-trimethoxybenzoyl chloride to give the esters II-IV. Acylation of compound XXX with acetyl chloride, 4-fluorophenoxyacetyl chloride and (4-fluorophenylthio)acetyl chloride and the following reduction of the amides with lithium aluminium hydride gave compounds XXXII, XXXIX and XL. Substitution reactions of 11-chloro-7-fluoro-2-isopropyl-10,11-dihydrodibenzo[b,f]thiepin with the corresponding N-monosubstituted piperazines resulted in compounds XXXIII-XXXV, XXXVII, XXXVIII, XLI and XLII. Alkylation of XXX with 2-(2-chloroethyl)-1,3-dioxolane afforded compound XXXVI. Pharmacological testing of the new compounds, derivatives and analogues of the neuroleptic agent isofloxythepin (I), for discoordinating and cataleptic activities, showed especially for compounds II, XXXIV and XXXVI very intensive and long-lasting effects. The decanoate III has properties of a depot neuroleptic agent.

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2

Pouzar, Vladimír, Hana Chodounská, Dalibor Sameš, Pavel Drašar та Miroslav Havel. "Derivatives of 5α-androstan-3α- and 3β-ol with acrylate side chain". Collection of Czechoslovak Chemical Communications 55, № 5 (1990): 1243–56. http://dx.doi.org/10.1135/cccc19901243.

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Hydroxy derivatives I, II, III, XVII and XX were oxidized to give the respective aldehydes IV, V, VI, XVIII and XXI which were further converted by Wittig-Horner reaction into unsaturated methyl and ethyl esters. Removal of the acetal protecting group in position 3 afforded methylesters X, XXIV and XXXVI and ethyl esters XIV, XXV and XXXVII. Compounds XXIV, XXV, XXXVI and XXXVII were converted into the corresponding hemisuccinates XXVIII, XXIX, XL and XLI and β-D-glucosides XXXII, XXXIII, XLIV and XLV.

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3

Hulinská, Hana, Miroslav Ryska, Ivan Koruna, et al. "Some further 2-(4-substituted 1-piperazinyl)acetamides derived from 6,11-dihydrodibenzo[b,e]thiepin. Transformations of 6,11-dihydrodibenzo[b,e]thiepin derivatives into anthraquinones, anthrones and anthracenes." Collection of Czechoslovak Chemical Communications 54, no. 5 (1989): 1388–402. http://dx.doi.org/10.1135/cccc19891388.

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Reactions of the secondary amines I and VIII with chloroacetyl chloride gave the 2-chloroacetamides II and IX affording by substitution reactions with 1-methylpiperazine, 2-(1-piperazinyl)ethanol and 3-(1-piperazinyl)propanol in the title compounds III-V and X-XII. The starting amine VIII was prepared from the ketone XIV via XVII and VII. The product of 1,6-addition and the following dehydrogenation XVIII was obtained as a by-product of the reaction of XIV with 1-methyl-4-piperidylmagnesium chloride. Reaction of 2-fluorodibenzo[b,e]thiepin-11(6H)-one (XV) with sodium hydride in dimethylformamide and the following hydrolysis gave 2-fluoroanthraquinone (XXVII). An attempt at trapping the presumed dianion of the type B by treatment with methyl iodide and the following hydrolysis resulted in a mixture of XXVII and the anthracenes XXXI and XXXII. A similar reaction sequence starting from the ketone XIV gave the anthrones XXX and XXXIV, 9-methoxy-10-(methylthio)anthracene (XXXIII) (main product) and anthraquinone (XXVIII). Oxidation of XXXIII with m-chloroperbenzoic acid or hydrogen peroxide gave either the sulfone XXXV or XXXVI.

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4

Jindřich, Jindřich, Hana Dvořáková, and Antonín Holý. "Synthesis of Isomeric N-(3-Fluoro-2-hydroxypropyl) and N-(2-Fluoro-3-hydroxypropyl) Derivatives of Purine and Pyrimidine Bases." Collection of Czechoslovak Chemical Communications 57, no. 7 (1992): 1466–82. http://dx.doi.org/10.1135/cccc19921466.

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Reaction of fluoromethyloxirane (III) with heterocyclic bases in the presence of potassium carbonate afforded N-(3-fluoro-2-hydroxypropyl) derivatives of adenine (VI), 3-deazaadenine (VII), 2-amino-6-chloropurine (XII), 6-nitro-1-deazapurine (IX), 4-methoxy-2-pyrimidone (XVIII) and its 5-methyl derivative (XIX). Acid hydrolysis of compounds XII, XVIII, and XIX gave 9-(3-fluoro-2-hydroxypropyl)guanine (XIII), 1-(3-fluoro-2-hydroxypropyl)uracil (XX) and -thymine (XXI). The intermediates XVIII and XIX were ammonolyzed to give 1-(3-fluoro-2-hydroxypropyl)cytosine (XXII) and -5-methylcytosine (XXIII). Reaction of chloro derivative XII with sodium azide followed by hydrogenation of the formed 2-amino-6-azidopurine (XIV) led to 9-(3-fluoro-2-hydroxypropyl)-2,6-diaminopurine (XV). 9-(3-Fluoro-2-hydroxypropyl)-1-deazaadenine (X) was obtained by hydrogenation of compound IX. Benzyloxymethyloxirane (XXIV) was reacted with pyridine-hydrogen fluoride adduct to give 3-benzyloxy-2-fluoropropanol (XXV) whose tosylate XXVI on reaction with sodium salt of adenine and subsequent hydrogenolysis of the intermediate XXVII afforded 9-(2-fluoro-3-hydroxypropyl)adenine (XXVIII). The same compound was obtained by reaction of 3-benzyloxy-1-bromo-2-fluoropropanol (XXX) with sodium salt of adenine followed by methanolysis. Condensation of sodium salt of XI, XVI, and XVII with synthon XXX and subsequent acid deblocking gave 9-(2-fluoro-3-hydroxypropyl)guanine (XXXIII), 1-(2-fluoro-3-hydroxypropyl)uracil (XXXVI), and 1-(2-fluoro-3-hydroxypropyl)thymine (XXXVII). 1-(2-Fluoro-3-hydroxypropyl) derivatives of cytosine (XXXVIII) and 5-methylcytosine (XXXIX) were obtained by ammonolysis of the corresponding 4-methoxypyrimidine intermediates XXXIV and XXXV.

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5

Machtoub, G. El. "Channel-specific dielectronic recombination of Ge(XXXII), Se(XXXIV), and Kr(XXXVI)." Canadian Journal of Physics 82, no. 4 (2004): 277–89. http://dx.doi.org/10.1139/p04-011.

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We present explicit calculations of channel-specific dielectronic recombination cross sections for hydrogen-like germanium, Ge(XXXII); selenium, Se(XXXIV); and krypton, Kr(XXXVI). The convoluted cross sections characterize K-shell emission spectra over a wide energy range where contributions from high-n (n = 2–10), satellite lines are included. The high-n contributions presented are important for better diagnostics in the domain of high-temperature plasmas. PACS Nos.: 32.30.Rj, 32.70.Rm, 34.70.te

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6

Bernardo-Filho, Mario. "Editorial." Brazilian Journal of Health and Biomedical Sciences 20, no. 1 (2021): 10. http://dx.doi.org/10.12957/bjhbs.2021.59720.

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7

Doschek, G. A., W. E. Behring, M. C. Richardson, et al. "Spectra and energy levels of Sm xxxiv, Eu xxxv, Gd xxxvi, and yb xxxxii." Journal of the Optical Society of America B 5, no. 2 (1988): 243. http://dx.doi.org/10.1364/josab.5.000243.

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8

Cherry, Joanna. "S. A. Bennett, PERSONAL INJURY DAMAGES IN SCOTLAND Edinburgh: Barnestoneworth Press, 1999. xxxxix and 453 pp (incl index). ISBN 0 9534152 0 1. £100." Edinburgh Law Review 4, no. 3 (2000): 359–60. http://dx.doi.org/10.3366/elr.2000.4.3.359.

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9

Dvořáková, Hana, Antonín Holý, Ivan Votruba, and Milena Masojídková. "Synthesis and Biological Effects of Acyclic Analogs of Deazapurine Nucleosides." Collection of Czechoslovak Chemical Communications 58, no. 3 (1993): 629–48. http://dx.doi.org/10.1135/cccc19930629.

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Deaza analogs of three basic types of S-adenosyl-L-homocysteine hydrolase (SAHase) inhibitors, (S)-DHPA (I), eritadenine (II) and AHPA (III), were prepared. Alkylation of 3-deazaadenine (V), 3-deazapurine (VI), 1-deazaadenine (VII) and 4-amino-6-bromo-5-cyanopyrrolo[2,3-d]pyrimidine (XXII) with (R)-2,2-dimethyl-4-tosyloxymethyl-1,3-dioxolane (XIIIb), followed by acid hydrolysis, afforded the corresponding (S)-2,3-dihydroxypropyl derivatives XVIIa -XIXa and XXV. Reaction of V and VII with 2,3-O-cyclohexylidene-D-erythrono lactone (XXIX) and subsequent removal of the protecting groups in an acid medium gave eritadenine analogs XXVII and XXVIII. Compounds V and VII were alkylated with bromoacetaldehyde diethyl acetal to give N-(2,2-diethoxyethyl) derivatives XXXII and XXXIII from which the substituted acetaldehyde derivatives were liberated in situ and converted into compounds XXX and XXXI by cyanohydrine reaction followed by acid hydrolysis. The alkylations were performed in dimethylformamide with sodium or cesium salts of the bases. Biological activity was observed only with 3-deazaadenine derivatives XVIIa, XXVII and XXX, which exhibit both enzyme-inhibitory and antiviral activities.

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10

Polman, Jiří, та Alexander Kasal. "The synthesis of 5-methyl-19-nor-5β-pregna-9,16-diene-3,20-dione, 5-methyl-19-nor-5β-pregna-9,10-diene-3,6,20-trione and their analogues with annellated E ring". Collection of Czechoslovak Chemical Communications 56, № 12 (1991): 2892–905. http://dx.doi.org/10.1135/cccc19912892.

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The synthesis of compounds VII, XVII, XXXIV and XXXVII is described, in which biological activity is assumed. The key steps of their preparation are the dehalogenation of compound XVIII and radicalic deoxygenation of the 6β-hydroxy group in compound XXX, which take place without skeletal rearrangements.

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