The present study was aimed at synthesizing isatin-5-sulphonamide derivatives are prepared by chlorosulphonation of isatin to prepare isatin-5-sulphonic acid chloride and it is subjected to reaction with different amines or anilines to form respective sulphonamide derivatives. The new compounds were characterized based on spectral (FT-IR, NMR and Mass) analysis. All the test compounds showed CNS depression while studying the gross behavioral changes. All the test compounds exhibited reduction in locomotor activity. Compound IIIf (R = p-toluidino) showed more reduction in the locomotor activity among all the test compounds. Compounds IIId, IIIc, IIIb, IIIa were next in the order of reduction of locomotor activity. The compounds were evaluated for anticonvulsant activity against maximum electric shock induced and Pentylenetetrazol (PTZ) induced seizures in mice using phenytoin as a standard.

Isatin (1H-indole-2, 3-dione) (I) was first discovered by Erdmann1 and Laurent2 in 1841, independently as a product from oxidation of indigo by nitric and chromic acids.

Written primarily for students of medicine, pharmacy, and pharmacology, this introductory book provides a concise summary of the principles that underlie the science of pharmacology. It presents the basic concepts required for understanding the use, mechanisms of action, toxicity and side effects, and therapeutic application of drugs in man. Thus the book may also be of interest to medical practitioners and to biological and medical scientists. Among topics covered are the sources of drugs, the way they are administered and dealt with in the body, as well as concepts about the nature of their actions. The last include their chemical interactions with components of cells and the manner in which these lead to therapeutically desirable as well as undesirable and even toxic effects. In addition, clinically related subjects, such as drug interactions, teratogenic and carcinogenic effects are discussed. The development and testing of new drugs are also described. For easy reference, at the back of the book there is a glossary of drugs named in the text.