There is provided a process for the preparation of [(5,6-dicarboxy-3-pyridyl)methyl]ammonium halides having the structural formula I ##STR1## 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.
提供了一种制备[(5,6-二羧基-3-
吡啶基)甲基]
铵盐的方法,其具有结构式I。[(5,6-二羧基-3-
吡啶基)甲基]
铵盐在制备
除草剂5-(烷氧基甲基)-2-(
2-咪唑啉-2-基)-
烟酸、酯和盐的中间体中具有用途。