Reaction of arene diamines with aroyl chloride and ammonium thiocyanate und
er the condition of solid-liquid phase transfer catalysis using polyethylen
e-glycol-600 (PEG-600) as the catalyst furnishes arene-bis-aroyl thioureas
3a-1 in good to excellent yield. The products have been characterized by an
alytical and spectral (IR and H-1 NMR) data.