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Paper | Regular issue | Vol 71, No. 3, 2007, pp.569-576
Published online, 26th January, 2007
DOI: 10.3987/COM-06-10958
A Convenient K2CO3 Catalysed Regioselective Synthesis for Benzopyrano[4,3-c]pyrazoles in Aqueous Medium

Mazaahir Kidwai,* Priya, Kavita Singhal, and Shweta Rastogi

*Green Chemistry Research Laboratory, Department of Chemistry, University of Delhi, Delhi-110007, India


This synthetic approach features heterocondensation reaction between in situ generated 3-arylidene-2,4-chromanediones and N-substituted hydrazine moiety avoiding the use of organic solvents at any stage. Water as solvent is taken for the synthesis of selective benzopyranopyrazole derivatives under microwaves (MWs). Hydroxy coumarin moiety is employed for this ecofriendly strategy.