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Formation of the Imidazolinone Ring Under Mild Conditions in the Presence of Sodium Hydride

Author(s): Aleksey N. Vasiliev | Antonio F. Lopez | Julio D. Fernandez | Anibal J. Mocchi

Journal: Molecules
ISSN 1420-3049

Volume: 9;
Issue: 7;
Start page: 535;
Date: 2004;
Original page

Keywords: Imidazolinones | herbicides | cyclization | sodium hydride

Substituted imidazolinones containing heterocyclic carboxylic acids as substituents and possessing herbicidal properties were synthesized by cyclization of 2-amino-2,3-dimethylbutyramide with heterocyclic ethyl dicarboxylates under mild conditions. The use of NaH as base leads to a significant increase in the reaction rate and allows the preparation of the target compounds in high yields.