Thermolysis of some thiourea derivatives

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Title:Thermolysis of some thiourea derivatives
Creators:
Gaber, Abd El-Aal M.
Aly, Morsy M.
Atalla, Ahmed A.
Journal or Publication Title:
Collection of Czechoslovak Chemical Communications, 56, 10, pp. 2183-2187

Abstract

Thermolysis of N/benzoyl-N’,N’-diphenylthiourea (BDTU)(<i>I</i>) at 250°C gives NH<sub>3</sub>, H<sub>2</sub>S, H<sub>2</sub>O, benzaldehyde, benzil, benzonitrile, diphenylamine, diphenylcyanamide, 2-phenylbenzimidazole, benzoyl isothiocyanate, carbazole and 2-phenylbenzthiazole, whereas, thermolysis of N-benzoyl-N'-<i>o</i>-tolylthiourea (BTTU) (<i>II</i>) under the same conditions afford NH<sub>3</sub>, H<sub>2</sub>S, H<sub>2</sub>O, benzaldehyde, benzil, benzonitrile, <i>o</i>-toluidine, <i>o</i>-tolyl isothiocyanate, <i>o</i>-tolylcyanamide, benzoyl isothiocyanate and N,N’-di-<i>o</i>-tolylthiourea. The main feature of these thermolyses is homolysis of the amide and thioamide bonds providing free radicals that undergo the common reactions involving H-abstraction, dimerization, coupling, fragmentation, rearrangement and cyclization. A suitable mechanism has been suggested to account for the observed products.

Title:Thermolysis of some thiourea derivatives
Creators:
Gaber, Abd El-Aal M.
Aly, Morsy M.
Atalla, Ahmed A.
Divisions:Life and Chemical Sciences > Institute of Organic Chemistry and Biochemistry > Collection of Czechoslovak Chemical Communications
Journal or Publication Title:Collection of Czechoslovak Chemical Communications
Volume:56
Number:10
Page Range:pp. 2183-2187
ISSN:0010-0765
E-ISSN:1212-6950
Publisher:Institute of Organic Chemistry and Biochemistry
Related URLs:
URLURL Type
http://dx.doi.org/10.1135/cccc19912183UNSPECIFIED
ID Code:5147
Item Type:Article
Deposited On:22 Feb 2010 11:31
Last Modified:22 Feb 2010 10:31

Citation

Gaber, Abd El-Aal M.; Aly, Morsy M.; Atalla, Ahmed A. (1991) Thermolysis of some thiourea derivatives. Collection of Czechoslovak Chemical Communications, 56 (10). pp. 2183-2187. ISSN 0010-0765

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