Zirconium (IV) chloride-catalyzed synthesis of 1, 5-benzodiazepine derivatives

KS Reddy, CV Reddy, M Mahesh…

Index: Reddy, K. Srinivasa; Reddy, Ch. Venkateshwar; Mahesh; Reddy, K. Rosi; Raju; Reddy, V. V. Narayana Canadian Journal of Chemistry, 2007 , vol. 85, # 3 p. 184 - 188

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Citation Number: 19

Abstract

Zirconium tetrachloride efficiently catalyzes the cyclocondensation reaction of o- phenylenediamine and a ketone in refluxing 1, 2-dichloroethane to afford the corresponding 2, 3-dihydro-1 H-1, 5-benzodiazepine in high yield. The formation of specific regioisomers and their structural elucidation are reported for the first time. Key words: zirconium tetrachloride, o-phenylenediamines, ketones, 1, 5-benzodiazepines, 1H NMR, ...