Neutral Ionic Liquid [hmim]Br as a Green Reagent and Solvent for the Mild and Efficient Dehydration of Benzyl Alcohols into (E)-Arylalkenes Under Microwave Irradiation

✍ Scribed by Rakesh Kumar; Abhishek Sharma; Naina Sharma; Vinod Kumar; Arun K. Sinha

• Publisher: John Wiley and Sons
• Year: 2008
• Tongue: English
• Weight: 186 KB
• Volume: 2008
• Category: Article
• ISSN: 1434-193X
• DOI: 10.1002/ejoc.200800657

✦ Synopsis

Abstract

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)