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

Document Type: Articles


1 Department of Chemistry, College of Science, Shahid Chamran University of Ahvaz, P.O. Box 61357-4-3169, Ahvaz, Iran.

2 Department of Chemistry, Payame Noor University, P.O. Box 19395-3697, Tehran, Iran.

3 Research Center of Environmental Chemistry, Payame Noor University, Ardakan, Yazd, Iran.


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.


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