993-997<span style="font-size:16.0pt;mso-bidi-font-size:9.0pt;
font-family:" times="" new="" roman";mso-fareast-font-family:"times="" roman";="" mso-ansi-language:en-us;mso-fareast-language:en-us;mso-bidi-language:ar-sa"="">Eight
new cephalosporin derivatives have been prepared by the reaction of
5-substituted-2-mercapto-1,3,4- thiadiazoles with cefotaxime acid and
cefalothin 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
activity.</span