Abstract A Pd-catalyzed decarboxylativecoupling of substituted benzoic acids with phenylboronic acid has been developed. Under the optimized conditions, a variety of substituted benzoic acids were found to undergo decarboxylativecoupling with various phenylboronic acids to give the desired unsymmetrical biaryls in good yields. [Supplementary materials are available for this article. Go to the publisher's
Manganese photocatalysts enabled versatile room‐temperatureC−H arylation reactions by means of continuous visible‐light photoflow, thus allowing for efficient C−H arylations in 30 minutes with ample scope. The robustness of the manganese‐catalyzed photoflow strategy was shown by visiblelight‐induced gram‐scale synthesis, clearly outperforming the batch performance.
Disclosed is a class of poly(aminoaromatic) compounds (I) obtained by capping polymeric polyols or polythiols with aromatic amine groups wherein the latter groups are linked by -O- or -S- to the polyol (polythiol) residues. Also disclosed are the precursor poly(nitroaromatic) compounds (II) and process therefor from which the compounds (I) are derived.
The polyamines are characterized by amine reactivities in respect of isocyanate polyaddition reactions which allows for polymer reaction rates that are intermediate of prior art related polyamine compounds.
Accordingly, the compounds (I) find their prime utility in the formation of synthetic resins containing polyurea linkages.