A simple, efficient and environment-friendly procedure is developed for the condensation of malononitrile with aromatic, heteroaromatic and aliphatic aldehydes in water. The ylidenemalononitriles 3 are synthesised in high yields (84–98%) and selectivities (87–98%) in distilled water at 65 °C for 1 h, avoiding the addition of any catalyst.
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Bigi et al. (2000) studied this question.
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