A novel non-C-symmetric -benzimidazolium salt derived from (±)-valinol has been prepared by a simple and straightforward process in good yield. The structure of -benzimidazolium salt provided a bulky steric group on the ethylene bridge; which facilitates the catalytic efficacy in the C()-C() formation. Its catalytic activity in Suzuki-Miyaura cross-coupling reaction of unactivated aryl chlorides has been found to have high efficacy in 1 mol% Pd loading. This protocol demonstrated the potential on the synthesis of sterically hindered biaryls.
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