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Investigation of Thermolysis Products of Some N ‐Arylthiophene‐2‐carboxamidoximes by Analytical and Spectroscopic Analyses
Author(s) -
Gaber AbdelAal M.,
Aly Morsy M. M.,
Mekhemer Islam M. A.
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201900978
Subject(s) - homolysis , chemistry , thermal decomposition , oxazole , tetralin , amide , naphthalene , pyrolysis , decomposition , nitrogen , imidazole , medicinal chemistry , organic chemistry , radical , catalysis
N ‐arylthiophene‐2‐carboxamidoxime derivatives ( a‐e ) were synthesized by using two methods and then subjected to thermolysis at 200–250 °C for 2 h under nitrogen atmosphere either alone or in the presence of tetralin and/or naphthalene as radical scavengers yielded imidazole, oxazole, triazine and amide derivatives. The pyrolysates from both reactions were separated with their constituents by column chromatography and analyzed then identified 1 H NMR, 13 C NMR and GC‐MS. A plausible mechanism is suggested through two competitive pathways involving the homolysis of N‐O and/or C‐N bonds to account for the thermolysis products.