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A mild and efficient, ionic‐liquid‐assisted, green protocol for the dehydration of benzyl alcohols into the corresponding (E)‐arylalkenes under microwave irradiation has been developed. The method utilizes a neutral and recyclable ionic liquid (1‐hexyl‐3‐methylimidazolium bromide) as a reagent and solvent to cleanly provide a wide range of olefins without the need of harsh and expensive Brønsted/Lewis acids. The method was extended to the efficient conversion of acetylated/benzoylated derivatives of benzyl alcohol into their corresponding (E)‐arylalkenes. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
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Kumar et al. (2008) studied this question.
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