Process for preparing 2-Hydroxy-4-Substituted Pyridines

A process for preparing a 2-hydroxy-4-substituted pyridine of the general formula (2):

• wherein R is a methyl group, a carboxyl group, a carbamoyl group, a hydroxyiminomethyl group or a cyano group, characterized in that a function of a microorganism belonging to the Delftia genus or Acidovorax genus is exerted on a 4-substituted pyridine of the general formula (1):
• wherein R is a methyl group, a carboxyl group, a carbamoyl group, a hydroxyiminomethyl group or a cyano group, said microorganism or said product obtained therefrom being capable of introducing a hydroxyl group to the 2-position of the 4-substituted pyridine.