Method for the preparation of substituted and unsbustituted 2,3-pyridine and quinolinedicarboxylic acids.

摘要

There is provided a process for the preparation of a substituted or unsubstituted 2,3-pyridine or quinolinedicarboxylic acid by hydrolysis of a substituted or unsubstituted 2,3-pyridine or quinolinedicarboxylic acid diester with an acid having an ionization constant pKa of less than 3.0 followed by isolation of the product as the free acid or an acid salt.