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Issue 4, 2003
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TBD-catalysed solventless synthesis of symmetrically N,N′-substituted ureas from primary amines and diethyl carbonate

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Abstract

Symmetrically N,N′-substituted ureas were obtained from primary amines in very good yields under solvent-less conditions using diethyl carbonate (DEC) as the carbonylation reagent and 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD) as the base catalyst. The products are precipitated directly from the reaction mixture after a volatile organic compound (VOC) free aqueous work-up. The catalyst can be recovered and reused.

Graphical abstract: TBD-catalysed solventless synthesis of symmetrically N,N′-substituted ureas from primary amines and diethyl carbonate

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Article information


Submitted
18 Feb 2003
First published
30 May 2003

Green Chem., 2003,5, 396-398
Article type
Paper

TBD-catalysed solventless synthesis of symmetrically N,N′-substituted ureas from primary amines and diethyl carbonate

R. Ballini, D. Fiorini, R. Maggi, P. Righi, G. Sartori and R. Sartorio, Green Chem., 2003, 5, 396
DOI: 10.1039/B301951A

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