Electrochemical bromination of cyclic and acyclic enes using biphasic electrolysis |
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Authors: | K Kulangiappar M Ramaprakash D Vasudevan |
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Institution: | CSIR, Central Electrochemical Research Institute, Karaikudi, India |
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Abstract: | A simple method of electrochemical bromination of a series of cyclic and acyclic enes (styrene and substituted styrenes, stilbene, indene, and cyclooctene) in a biphasic water–chloroform mixture mediated by bromide/bromine redox system is reported. Aqueous 25% NaBr/H2SO4 is used as the electrolyte. Regio- and stereoselective dibromination of enes is achieved. Moderate to excellent yields of the product (83–98%) is obtained depending on the substrate. Electrolyte reuse has also been demonstrated successfully using HBr in the dibromination of styrene. |
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Keywords: | Biphasic media cyclic and acyclic enes dibromide electrolytic oxidation stereoselectivity |
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