Process for the preparation of...

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C - Chemistry, Metallurgy

07

D

C07D 401/04 (2006.01) C07D 213/80 (2006.01) C07D 213/84 (2006.01) C07D 215/32 (2006.01) C07D 405/14 (2006.01)

Patent

CA 2207379

There is provided a process for the preparation of [(5,6-dicarboxy-3-pyridyl)methyl]ammonium halides having the structural formula I (see fig. I) The [(5,6-dicarboxy-3-pyridyl)methyl]ammonium halides are useful as intermediates in the preparation of herbicidal 5-(alkoxymethyl)-2-(2-imidazolin-2-yl)- nicotinic acids, esters and salts.

L'invention porte sur un procédé permettant de préparer des halogénures de [(5,6-dicarboxy-3-pyridyl)méthyl]ammonium possédant la formule développée I (voir fig. I). Les halogénures de [(5,6-dicarboxy-3-pyridyl)méthyl]ammonium sont utiles comme intermédiaires dans la préparation d'herbicides à base d'acide 5-(alkoxyméthyl)-2-(2-imidazolin-2-yl)-nicotinique et des esters et des sels correspondants.

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