OICC Press Iranian Journal of Catalysis 2345-4865 8 3 2024 02 03 Regioselective conversion of epoxides to vicinal nitrohydrins catalyzed by silica-bound 3-{2-[poly(ethylene glycol)]ethyl}-substituted 1-methyl-1H-imidazol-3-ium bromide as a green and reusable catalyst under aqueous thermal conditions EN Neda Ayashi Department of Chemistry, College of Science, Shahid Chamran University of Ahvaz, P.O. Box 61357-4-3169, Ahvaz, Iran. Mehdi Fallah-Mehrjardi Department of Chemistry, College of Science, Shahid Chamran University of Ahvaz, P.O. Box 61357-4-3169, Ahvaz, Iran. Ali Reza Kiasat Department of Chemistry, College of Science, Shahid Chamran University of Ahvaz, P.O. Box 61357-4-3169, Ahvaz, Iran. Journal Article 2024 02 03 An environmentally benign procedure for the synthesis of vicinal nitrohydrins via the regioselective ring opening reaction of epoxides with nitrite anion using silica-bound 3-{2-[poly(ethylene glycol)]ethyl}-substituted 1-methyl-1H-imidazol-3-ium bromide as an effective heterogeneous phase transfer catalyst was described. Short reaction time, high yield of products, simple work-up procedure, and recyclability of the catalyst were some of the striking features of the present protocol. The recovered catalyst could be reused five times without any loss in its catalytic activity and selectivity.