New, sterically demanding 1,3-dialkylbenzimidazolium salts (2a-c) as N-heterocyclic-carbene precursors have been synthesized and characterized. The ortho position of aromatic aldehydes was directly and selectively arylated with aryl chlorides in the presence of a catalytic system prepared in situ from Pd(OAc)(2), 1,3-dialkylbenzimidazolium chlorides (2a-c), and Cs2CO3. (C) 2008 Wiley Periodicals, Inc.
C1 [Dogan, Oznur; Gurbuz, Nevin; Ozdemir, Ismail] Inonu Univ, Fac Sci & Art, Dept Chem, TR-44280 Malatya, Turkey.
[Cetinkaya, Bekir] Ege Univ, Dept Chem, Fac Sci, TR-35100 Bornova, Turkey.