| abstract |
PROCEDURE FOR OBTAINING CARBAMIL DERIVATIVES OF A-HYDROXY ACIDS. IT CONSISTS OF THE STEREO SELECTIVE ENZYMATIC HYDROLYSIS REACTION OF 5-SUBSTITUTED 2,4-OXAZOLIDINDIONES OF FORMULA (I), IN WHICH R IS AN AROMATIC OR ALIPHATIC RADICAL, SUBSTITUTED OR UNSUBSTITUTED. HYDROLYSIS IS CARRIED OUT WITH AGENTS THAT HAVE ENZYMATIC ACTIVITY WHICH ARE OBTAINED FROM CALF LIVER HOMOGENATES OR FROM VARIOUS MICROORGANISMS CULTIVATED UNDER AEROBIC CONDITIONS IN A CULTURE MEDIUM WITH A PH BETWEEN 6 AND 8, AT A TEMPERATURE BETWEEN 20 AND 80 C. |