Abstract
New electron-deficient biarylphosphine li- gands were studied and proved to be efficient for the direct arylation of heteroarenes with aryl io- dides. The ability of a more electron-deficient palla- dium centre to accelerate the arylation of heterocy- cles that remained unreactive with aryl iodides in the past has been validated and these heteroarenes can now be smoothly reacted in the presence of a new electrophilic catalyst. Experimental evidence suggests a viable concerted metalation-deprotona- tion pathway for the CH bond cleavage step with an electron-deficient palladium centre.
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