Eight new cephalosporin derivatives have been prepared by the reaction of 5
-substituted-2-mercapto-1,3,4-thiadiazoles with cefotaxime acid and cefalot
hin acid respectively in the presence of boron trifluoride diethyl etherate
in acetic acid using microwave irradiation as compared to the conventional
method and these derivatives are evaluated for their antibacterial activit
y.