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Synthesis of substituted 1,4-diazepines and 1,5-benzodiazepines using an efficient heteropolyacid-catalyzed procedure. 2010
Rachedine Kaoua, and
Norah Bennamane, and
Saliha Bakhta, and
Sihame Benadji, and
Cherifa Rabia, and
Bellara Nedjar-Kolli
Laboratory of Applied Organic Chemistry, Houari Boumediene University of Sciences and Technology, BP 31, El-Alia, Bab-Ezzouar, 16111 Algiers, Algeria.
An efficient and improved procedure for the synthesis of 1,4-diazepine and 1,5-benzodiazepine derivatives via the reaction of ketimine intermediates with aldehydes in the presence of Keggin-type heteropolyacids (HPAs) was developed. High yields and short reaction times were obtained for both electron-releasing and electron-withdrawing substituted 1,4-diazepine and 1,5-benzodiazepines derivatives.
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