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

Author： Pasha M.   Jayashankara V.  

Publisher： Taylor & Francis Ltd

ISSN： 0039-7911

Source： Synthetic Communications, Vol.36, Iss.12, 2006-07, pp. : 1787-1793

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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.

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