To further diversify the obtained material, hydrolysis of 2ad was carried out. Intriguingly, 2k was selectively obtained, where only the ester group at ortho-positioned was hydrolyzed, in 89% yield. Furthermore, 2k was successfully condensed with NHPI to afford 2l, where the NHPI ester is introduced at a different position compared to 2f. Thus, this route enables the complementary synthesis of pyridine-derivative bearing redoxactive ester.