Synthesis and hypoglycemic activity of 4-substituted 3-mercaptopicolinic acids

Abstract
3-Mercapto-4-methylpicolinic acid was 1 of very few compounds derived from 3-mercaptopicolinic acid (3-MPA) to have hypoglycemic activity. In an effort to find compounds with greater potency than 3-MPA, several 4-substituted 3-mercaptopicolinic acids (4-OMe, OC6H5, SMe, SH, Cl, NH2, Et) were prepared and tested in 48 h fasted rats. None was hypoglycemic in this test system after oral dosing of 150 mg/kg.