9-Chloro-2,4-(un)substituted acridines (1) on condensation with sulpha- diazine, sulphathiazole, and sulphaacetamide gave condensation products 3a-h. 3-Aryl-4-phenyl-2-imino-4-thiazolines (4) on condensation with 9-chloro-2,4-(un)substituted acridines (1) gave condensation products 5a–5o. Both 3a–3h and 5a–5o were purified by crystallization or by chromatography. Structures assigned to 3a–3h and 5a–5o are supported by correct spectral data. Antiinflammatory and analgesic activity screening of 3a, 3e, 3f and 5a–5c, 5e, 5g, 5i, 5m, 5n were carried out using carrageenin induced paw oedema and phenyl quinone writhing assay. Some of the compounds exhibited interesting antiinflammatory or analgesic activities.
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