Polymer-immobilized lipoamides—iron(II) system as a reducing catalyst for the reduction of nitrobenzenes to anilines by sodium borohydride

Based on a redox function of 1,2-dithiolane ? 1,3-dithiol, lipoamide (LAm), and polymers having lipoamide structure were found to work as reducing catalysts for the reduction of p-substituted nitrobenzenes to corresponding anilines with sodium borohydride in the presence of ferrous chloride in ethanol. Polyallylamine having lipoamide structure (PAA—LAm) showed a good reactivity for the reduction and was easily separated from the reaction mixture.