Some New Information on the Formation of Substituted 4-Amino-1-Substituted Phenyl-1H-Pyrazoles from beta-Enaminones and Diazonium Tetrafluoroborates

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F11%3A39892209" target="_blank" >RIV/00216275:25310/11:39892209 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1002/jhet.579" target="_blank" >http://dx.doi.org/10.1002/jhet.579</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/jhet.579" target="_blank" >10.1002/jhet.579</a>

Result language

angličtina

Original language name

Some New Information on the Formation of Substituted 4-Amino-1-Substituted Phenyl-1H-Pyrazoles from beta-Enaminones and Diazonium Tetrafluoroborates

Original language description

Upon reaction of 2-methyl-, 3-ethoxycarbonyl, and 4-ethoxycarbonylbenzenediazonium tetrafluoroborate with 1-cyclopropyl-3-phenylaminohex-2-en-1-one 3-cyclopropylcarbonyl-1-(substituted phenyl)-5-ethyl-4-phenylamino-1H-pyrazoles are formed. On the other hand, the reaction of 1-cyclopropyl-3-phenylaminohex-2-en-1-one and 5-methylaminohept-4-en-3-one with sterically more demanding 2-ethoxycarbonylbenzenediazonium tetrafluoroborate does not give the corresponding pyrazoles but the probable intermediates onthe route to the pyrazoles: 1-cyclopropyl-3-phenyliminohexane-1,2,4-trione 2,4-bis(2-ethoxycarbonylphenylhydrazone) and 3-methyliminoheptane-2,4,5-trione 2,4-bis(2-ethoxycarbonylphenylhydrazone), respectively. All the compounds were identified on the basis of 1H-/13C-NMR spectra. The structure of 1-cyclopropyl-3-phenyliminohexane-1,2,4-trione 2,4-bis(2-ethoxycarbonylphenylhydrazone) was confirmed by 15N-NMR spectra and X-ray. The bis(2-ethoxycarbonylphenylhydrazones) were found to show a

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

CC - Organic chemistry

OECD FORD branch

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Project

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Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2011

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Heterocyclic Chemistry

ISSN

0022-152X

e-ISSN

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Volume of the periodical

48

Issue of the periodical within the volume

4

Country of publishing house

US - UNITED STATES

Number of pages

7

Pages from-to

780-786

UT code for WoS article

000293745900005

EID of the result in the Scopus database

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