Mechanochemical Knoevenagel condensation investigated in .
mercial ball mill (Pulverisette 23, Fritsch, Germany). In a typical experiment, equimolar quantities of the reactants pnitrobenzaldehyde (800 mg, mmol) and malononitrile mg, mmol) were weighed in milling jars (10 mL, stainless steel or Perspex). Two milling balls (stainless steel, 4 g, 10 mm diameter) were added to the ...