Efficient Synthesis ofN,N′‐Disubstituted Ureas/Thioureas Catalyzed by Iodine

Abstract Abstract Iodine is an efficient catalyst for the synthesis of symmetrically N,N′‐disubstituted ureas/thioureas by heating respective amines or phenyl hydrazine and urea/thiourea on a preheated hot plate at 90–95°C, under solvent‐free conditions. The yields are excellent, and the reactions go to complete within 5–10 min. Keywords: Aminesiodine N,N′‐disubstituted urea/thioureaphenyl hydrazine Acknowledgment One of the authors, V. P. Jayashankara, wishes to thank Mrs. Faheemunnisa, assistant mistress, Government Model Higher Primary School, Aswathnagar, Bangalore Karnataka, India, for the encouragement.