Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/27458
Title: Synthesis, thermal transformations, and mass spectrometric fragmentation of 4,4'-[1,2-bis(5-hydroxy-3-methyl-1-phenyl-1H-pyrazol-4-yl)ethane-1,2-diyl]- bis(5-methyl-2-phenyl-1,2-dihydro-3H-pyrazol-3-one)
Authors: Azev, Yu. A.
Kovalev, I. S.
Mekhaev, A. V.
Gibor, A. M.
Baranov, V. I.
Bakulev, V. A.
Ermakova, O. S.
Issue Date: 2013
Publisher: Chemistry of Heterocyclic Compounds
Citation: Synthesis, thermal transformations, and mass spectrometric fragmentation of 4,4'-[1,2-bis(5-hydroxy-3-methyl-1-phenyl-1H-pyrazol-4-yl)ethane-1,2-diyl]- bis(5-methyl-2-phenyl-1,2-dihydro-3H-pyrazol-3-one) / Yu. A. Azev, I. S. Kovalev, A. V. Mekhaev [et al.] // Chemistry of Heterocyclic Compounds. — 2013. — Vol. 49. — № 4. — P. 545-550.
Abstract: Quinoxaline reacted with 3-methyl-1-phenylpyrazol-5-one at room temperature in the presence of triethylamine in DMSO solution, to form 4,4'-[1,2-bis(5- hydroxy-3-methyl-1-phenyl-1H-pyrazol-4-yl)-ethane-1,2-diyl]bis(5-methyl-2- phenyl-1,2-dihydro-3H-pyrazol-3-one). Heating of the obtained crystalline product at 240-250 C temperature led to the known 4-[(5-hydroxy-3-methyl-1- phenyl-1H-pyrazol-4-yl)methylidene]-5-methyl-2-phenyl-2,4-dihydro-3H-pyrazol-3- one. The mass spectral fragmentation of the obtained compounds was characterized. © 2013 Springer Science+Business Media New York.
Keywords: 3-METHYL-1-PHENYLPYRAZOL-5-ONE
QUINOXALINE
TETRAPYRAZOLYLETHANE
THERMOGRAVIMETRY
URI: http://hdl.handle.net/10995/27458
SCOPUS ID: 84881154282
WOS ID: WOS:000322133800004
PURE ID: 898469
ISSN: 0009-3122
1573-8353
DOI: 10.1007/s10593-013-1280-7
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS

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