Abstract
A solvent-free, one-pot process for the preparation of pentasubstituted 3-arylcyclopropane-1,1,2,2-tetracarbonitriles in the presence of solid sodium ethoxide by milling was achieved. The one-pot reaction of aromatic aldehydes and dialdehydes with malononitrile, cyanogen bromide, and solid sodium ethoxide afforded pentasubstituted cyclopropanes in excellent yield under solvent-free conditions. The structures were characterized and confirmed by IR, 1H NMR, 13C NMR spectroscopy, and mass spectrometry. Its advantages are easy workup, mild reaction conditions, and excellent yields.
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