Abstract Knoevenagel condensation of aromatic aldehydes with active methylene compounds under solvent??free conditions to synthesize arylidene compounds by grinding in the presence of TEBA at room temperature has been described. This method is simple, efficient, and environmentally friendly.
![Propanedinitrile,2-[(3,4-dichlorophenyl)methylene]- Structure](https://image.chemsrc.com/caspic/280/3138-23-6.png)