| abstract |
The object of the invention is a process for the preparation of an azideid-3-carboxy acid of formula I or of a salt thereof, in which R1-H, C1-6 alkyl, or C3-8 cycloalkyl PHENYL-CH (R3) - IN WHICH R3 = H, PHENYL OR C1-4 ALKYL. AN AZETIDINE OF FORMULA II IS REACTED IN WHICH R1 IS AS ABOVE AND X = H, CARBOXYL OR HYDROXYMETHYL, WITH AN ALKALI METAL BASE AT 150-300 DEGREES C IN THE PRESENCE OF A CATALYST COMPRISING A METAL OR A COMPOUND A GROUP IIB METAL; AND POSSIBLY CONVERTING THE SALT OBTAINED INTO CORRESPONDING ACID; AS WELL AS NEW SALTS OF ALKALINE OR ALKALINOTERROUS METALS OR QUATERNARY AMMONIUM OF SUCH ACIDS |