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Note | Regular issue | Vol 68, No. 5, 2006, pp.1017-1023
Published online, 31st March, 2006
DOI: 10.3987/COM-05-10647
Synthesis of 1,5-Benzodiazepine Derivatives Catalysed by Zinc Chloride

Mohamed Afzal Pasha* and Vaderapura Puttaramegowda Jayashankara

*Department of Studies in Chemistry, Central College Campus, Bangalore University, Bangalore-560 001, India


2,3-Dihydro-1H-1,5-benzodiazepines have been synthesized by the condensation of
o-phenylenediamine (OPDA) with cyclic or acyclic ketones in the presence of zinc chloride as catalyst at 80-85 °C. The yields are high and the reactions go to completion within 10-20 min.