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Synlett 2009(17): 2809-2814  
DOI: 10.1055/s-0029-1217997
LETTER
© Georg Thieme Verlag Stuttgart ˙ New York

Phenyl 4,5-Dichloro-6-Oxopyridazine-1(6H)-Carboxylate as Carbonyl Source: Facile and Selective Synthesis of Carbamates and Ureas under Mild Conditions

Hyung-Geun Lee, Min-Jung Kim, Song-Eun Park, Jeum-Jong Kim, Bo Ram Kim, Sang-Gyeong Lee, Yong-Jin Yoon*
Department of Chemistry, Research Institute of Natural Sciences, Graduate School for Molecular Materials and Nanochemistry, Gyeongsang National University, Jinju Gyeognam 660-701, Korea
Fax: +82(55)7610244; e-Mail: yjyoon@gnu.ac.kr;
Further Information

Publication History

Received 16 July 2009
Publication Date:
30 September 2009 (online)

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Abstracts

The selective syntheses of carbamates, symmetric ­ureas, and unsymmetrical ureas have been accomplished by the ­reaction of amines with phenyl 4,5-dichloro-6-oxopyridazine-1(6H)-carboxylate as a carbonyl source under mild conditions. It is noteworthy that this process is mild, economic, and convenient.

Key words

carbamate - symmetric urea - unsymmetric urea - carbon­yl source - pyridazinone

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