Przemysl Chemiczny, Vol.92, No.10, 1868-1871, 2013
Condensation of phenols with methyl pyruvate in 1-n-butyl-3-methylimidazolium aluminium chloride ionic liquid medium
PhOH, PhOMe and m-MeC6H4OH were condensed with MeOCOCOMe in 1-n-butyl-3-methylimidazolium aluminum chloride optionally in CHCl3 or in presence of AlCl3 to resp. bisphenols. Use of the ionic liq. medium resulted in an increase in the bisphenol yields except for m-MeC6H4OH where no formation of bisphenol was obsd.