5-HETROCYCLLC-PYRIDINE-2, 3-DICARBOXYLATES AND METHODS FOR THE PREPARATION THEREOF

摘要

There are provided alkyl esters of 5-heterocyclic-pyridine-2,3- dicarboxylic acids useful as intermediates for the preparation of highly effective 5-heterocyclic-2-(2-imidazolin-2-yl)pyridine herbicidal agents and methods for the preparation thereof.