[N-aryl pyrrole derivatives with analgesic and anti-inflammatory activity 2. Pharmacologic modulation of the 1-arylpyrrole model].

In order to increase the pharmacological activities of the molecules described in the first part of the paper, an acetic or a 2-propionic group was introduced in to the fundamental structure, either on the aromatic ring, on the pyrrole nitrogen or on carbon 3 of the heterocycle. Moreover, a 4-chlorobenzoyl group was fixed on carbon 3 of the pyrrole via condensation of 4-chloroaniline with 4-chlorobenzoyl triketones. The structure of the adducts was demonstrated both by N.M.R. spectra and by using another unambiguous synthetic route. Finally, derivatives with the salicylic substructure on the nitrogen of the pyrrole are described. Their analgesic and anti-inflammatory properties are reported as well as some effects on the central nervous system.