NUCLEOPHILIC AROMATIC-SUBSTITUTION IN MICROEMULSIONS STABILIZED BY CHEMODEGRADABLE SURFACTANTS

Systematic synthetic studies have been performed for the reaction of 2 ,4-dinitrochlorobenzene (DNCB) with hydroxide, iodide and aryl (phenyl , p-cresyl) oxide ions in oil-in- water microemulsions at 50 degrees C . The n-octane-in-water microemulsion systems are stabilized by a chem odegradable ridecyl-1,3-dioxolan-4-yl)methyl]trimethylammonium bromide (I) and 1-butanol as cosurfactant. A successful preparative approach has been also elaborated for the reaction of DNCB with n-hexylamine in microemulsion of surfactant I where the amine acts as a reagent and a cosurfactant. In all the studied systems the products have been isola ted from the microcmulsion medium in approx. 85-95% yield without unfa vourable processes as foaming and emulsification.