A Mild and Efficient Synthesis of N–Aryl–N′–Aroyl Thioureas under Phase Transfer Catalysis and Solvent-Free Conditions

Abstract
A series of N–aryl– N′–aroyl thioureas 3a-m were synthesized in high yields (80.0-98.1%) by an environmentally benign, simple and efficient method under phase transfer catalysis and solvent-free conditions.