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http://hdl.handle.net/20.500.12358/26138
TitleRing Transformation of Heterocycles Transformation of 4, 5-Dihydro-5, 5-Dimethyl-H-1, 2, 4-Triazoles Into 5-Methyl-H-1, 2, 4-Triazoles
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Abstract

Reaction of 1-aryl-3-acetyl-4, 5-dihydro-5, 5-dimethyl-1H-1, 2, 4-triazoles (3) with acetyl chloride or acetic anhydride is found to give the ring transformation product 1-aryl-3-acetyl-5-methyl-1H-1, 2, 4-triazoles (4) instead of the expected N-acetyl derivative (5). This ring transformation is believed to start with N-acylation of the dihydrotriazole (3) to form the corresponding N-acetyl derivative (5), which extrudes the actone via a four-membered ring intermediate (6) and recyclizes to the aromatic triazole (4) suggesting the conversion sequence (3)→(5)→(6)→(4). It is Also found that. The triazoles 4 can be prepared directly via a one put reaction between nitrilimines and acetaldoximes.(Author) 8 refs., 4 Sches

Authors
Awadallah, Adel M.
TypeJournal Article
Date2001
Published inAbhath Al-Yarmouk. Pure Science and Engineering Series
SeriesVolume: 10, Number: 2A
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The institutional repository of the Islamic University of Gaza was established as part of the ROMOR project that has been co-funded with support from the European Commission under the ERASMUS + European programme. This publication reflects the views only of the author, and the Commission cannot be held responsible for any use which may be made of the information contained therein.

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The institutional repository of the Islamic University of Gaza was established as part of the ROMOR project that has been co-funded with support from the European Commission under the ERASMUS + European programme. This publication reflects the views only of the author, and the Commission cannot be held responsible for any use which may be made of the information contained therein.

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