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Note | Regular issue | Vol 55, No. 8, 2001, pp.1573-1580
Published online, 1st January, 1970
DOI: 10.3987/COM-01-9254
Behavior of Hydrazonoyl Chlorides towards the C=N Double Bond of Δ2-Pyrazolines. A Study on 2-(4-Nitro-phenyl)-2,3,3a,4,5,6-hexahydro-6-oxofuro[3,4-c]pyrazole

Giorgio Molteni* and Luisa Garanti

*Dipartimento di Chimica Organica e Industriale, Centro C.N.R. , Università degli Studi di Milano, via Golgi 19, 20133 Milano, Italy


The reaction between title compound (3) and hydrazonoyl chlorides (4) was performed in the presence of triethylamine or silver salts. The product output was quite different depending upon the basic agent and, besides the formation of the novel pyrazolo[4,5-b]furo[3,4-c]pyrazole skeleton, a new degradative behavior of the pyrazoline ring has been observed.