abstract |
THERE ARE PROVIDED COMPOUNDS OF THE FORMULA I (FORMULA 1) WHEREIN M IS ONE OR TWO N IS ZERO, ONE OR TWO; A AND B ARE ORGANIC RESIDUES, R1 AND R2 ARE HALOGEN OR HYDROGEN ATOM OR ORGANIC GROUPS SAID DERIVATIVES (I) ARE ENDOWED WITH ELASTASE INHIBITORY ACTIVITY.TWO PROCESSES FOR THEIR PREPARATION STARTING FROM THE CORRESPONDING 4-ACYL CEPHEM ARE ALSO PROVIDED. |