496066-75-2Relevant academic research and scientific papers
Eclectic 1-Aryl-1,2-diazabuta-1,3-dienes: Valuable tools for the preparation of pyrrol-2-ones, 1-arylpyrazoles, 2-(3-oxopyrazol-4-yl)malonates and 4-(2-oxopyrrol-3-yl)pyrazol-3-ones
Attanasi, Orazio A.,De Crescentini, Lucia,Favi, Gianfranco,Filippone, Paolino,Mantellini, Fabio,Santeusanio, Stefania
, p. 1546 - 1552 (2007/10/03)
1-Aryl-1,2-diazabuta-1,3-dienes react with dimethyl malonate to give hydrazonic intermediates that in turn are converted into pyrrol-2-ones, 1-arylpyrazoles and 2-(3-oxopyrazol-4-yl)malonates. The latter compounds represent an useful entry to 4-(2-oxopyrrol-3-yl)pyrazol-3-ones, by means of the addition of another molecule of 1,2-diazabuta-1,3-diene and subsequent cyclization of the adducts.
