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Synthetic Communications
An International Journal for Rapid Communication of Synthetic Organic Chemistry
Volume 36, 2006 - Issue 12
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Original Articles

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

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Pages 1787-1793 | Received 12 Dec 2005, Published online: 22 Aug 2006
 

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.

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.

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