L-n-butyl-3-methylimidazolium bromide

Valizadeh, H. Shockravi, A. Gholipur, H. Microwave assisted synthesis of coumarins via potassium carbonate catalyzed Knoevenagel condensation in l-n-butyl-3-methylimidazolium bromide ioiuc liquid. J. Heterocycl. Chem. 2007,44, 867-870. 

Similarly, the cross-coupling reaction between imidazole and phenylboronic acid was performed with different ILs, and the results are grouped in Fig. 4. Among the ILs tested, hydrophilic [bmim][BF4] was found to be superior (95% yield) than that of hydrophobic [bmimHPFe] (80% yield), whereas the crosscoupling reaction was not successful in other molten salts such as n-tetrabuty-lammonium bromide (n-Bu4Br) and l-n-butyl-3-methylimidazolium bromide, [bmim][Br], under similar reactions conditions. These results clearly indicate that both the cation and anion play a signiflcant role in this cross-coupling reactions. 

Ionic liquids [e.g. l-ethyl-3-methylimidazolium triflate (mp. —9 C) l-n-butyl-3-methyl-pyridinium chloride (mp. 98 °C) tetra- -butyl-ammonium bromide (mp. 130 °C)]... 

---