PURPOSE: To obtain the subject compound useful as an intermediate for medicines and agricultural chemicals at a low cost by reducing an inorganic salt of an α-keto acid sparingly soluble in water with a microorganism, etc.
CONSTITUTION: An inorganic salt of an α-keto acid (e.g. 2-keto-4methylpentanoic acid) sparingly soluble in water is reduced with a microorganism [e.g. Streptococcus faecalis (IFO 12964)] or an enzyme [Staphyloccocus epideromidis (DSM 20343)] to afford the objective compound.
JP18212590A1990-07-101990-07-10Production of alpha-hydroxy acid