Process for preparing 1-substituted...

Details Process for preparing 1-substituted... Process for preparing 1-substituted...

C - Chemistry, Metallurgy

07

D

C07D 233/66 (2006.01)

Patent

CA 2314040

A process for preparing specific 1-substituted 5-hydroxy-imidazoline-2,4- diones by reacting glyoxylic acid with N-substituted ureas is provided, where this process is carried out in a 10-80% strength aqueous solution and in the presence of an acid catalyst. The 1-substituted 5-hydroxy-imidazoline-2,4-diones can subsequently be converted in a further reaction step to give 1-substituted 5-alkoxy- imidazoline-2, 4-diones.

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