A cyclobutene-1,2-bis(imidazolium) salt proved to be an efficient
catalyst precursor for one-pot tandem Suzuki-Miyaura/dehydrobromination reactions
for the synthesis of alkynes starting from 1,1-dibromoalkenes and
palladium(II) acetate, aryl boronic acids, and potassium tert-butoxide in toluene. Starting materials were
prepared from aldehydes under Corey-Fuchs conditions.
imidazol-2-ylidene - N-heterocyclic carbene - biscarbene
complex - Corey-Fuchs reaction