J. Iran. Chem. Soc., Vol. 6, No. 3 September 2009, pp.477~482.

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Solvent-Free One Pot Synthesis of Benzo-[b]-1,4-diazepines Using Reusable Sulfamic Acid Catalyst

S.R. Sardaa, W.N. Jadhavb, N.B. Kolheb, M.G. Landgec and R.P. Paward,*

aDepartment of Chemistry, J. E. S. College, Jalna-431203, India
bOrganic Chemistry Synthesis Laboratory, Dnyanopasak College, Parbhani-431401, India
cDepartment of Chemistry, Vidyanath College, Parli-vaijnath-431515, India
dDeogiri College, Station Road, Aurangabad-431005, India

α-β-Unsaturated carbonyl compounds on condensation with o-phenylenediamine in the presence of catalyst sulfamic acid under solvent free conditions, resulted in the formation of corresponding benzo-[b]-1,4-diazepines in excellent yields.

Keywords: Benzodiazepines, α-β-Unsaturated carbonyl compounds, o-Phenylene-diamine, Sulfamic acid

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