Anti-inflammatory.

Isatin is an endogeneous and an important class of heterocyclic compound. It possess indole nucleus having both keto and lactam moiety with a diverse pharmacological properties like antimicrobial, antitubercular, anticonvulsant activity etc. Isatin derivatives are synthetically important substrates, which can be used for the synthesis of a large variety of heterocyclic compounds, and as raw material for drug synthesis. Recently, isatin derivatives have attracted strong interest in organic and medicinal chemistry due to their potent biological and pharmacological activities. The purpose of this review is to provide information on the pharmacological activities of isatin and its derivative.

Inflammation is a complex biological response of vascular tissues to harmful stimuli. The stimulus may be thermal (heat or cold), chemical (foreign substances, foreign organisms, drugs), or mechanical (trauma). Anti-inflammatory agents are the agents which relieves the inflammation. Amino acids L-tyrosine was refluxed in presence of thionyl chloride and methanol for 8 hrs to form its methyl ester hydrochloride(a). Compound (a) and taurine were refluxed with Salicylic acid in 30 % NaOH solution for 2 hrs and neutralized with conc. hydrochloric acid to precipitate target compounds (b, c). These compounds were characterized on basis of melting point, TLC (Rf value), IR and 1H NMR spectra and evaluated for analgesic and anti-inflammatory activity. Target compound (b) was found to be most active with 96.3 % protection for analgesic and anti-inflammatory activity.