Abstract
A utility approach toward trisubstituted allenes through Pd-catalyzed alkynyl Heck coupling reaction of alkynes and aryl iodides is reported. This process proceeded via regioselective carbopalladation of 1-aryl-1-alkynes to give alkenyl palladium species, which undergo β-hydride elimination to provide 1,1-diarylallenes in 25-71% yields. This method features unique regioselectivity and high functional group compatibility.
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