Palladium-Catalyzed Decarbonylative Trifluoromethylation of Acid Fluorides
作者:Sinead T. Keaveney、Franziska Schoenebeck
DOI:10.1002/anie.201800644
日期:2018.4.3
can readily be made from widely available or biomass-feedstock-derived carboxylic acids, their use as functional groups in metal-catalyzed cross-coupling reactions is rare. This report presents the first demonstration of Pd-catalyzed decarbonylative functionalization of acid fluorides to yield trifluoromethyl arenes (ArCF3 ). The strategy relies on a Pd/Xantphos catalytic system and the supply of fluoride
We describe here a Ni-catalysed deamidative fluorination of diverse amides with electrophilic fluorinating reagents. Different types of amides including aromatic amides and olefinic amides were well compatible, affording the corresponding acyl fluorides in good to excellent yields.
A phosphine-catalyzed acyl-group exchangereaction between carboxylic acids and an aroyl fluoride has been developed. A variety of acyl fluorides are directly obtained from carboxylic acids through a catalytic system composed of tricyclohexylphosphine (PCy3) and 2,6-difluorobenzoyl fluoride as a novel deoxyfluorination reagent.
utilizing inorganic potassium fluoride (KF) as a safe and inexpensive fluoridesource has been developed. Both aryl carboxylic acids and cinnamyl carboxylic acids could be efficiently transformed into valuable acyl fluorides in moderate to high yields with good functional group tolerance. A scale-up reaction could be carried out smoothly undersolvent-freeconditions, which further demonstrated the
Suzuki–Miyaura-type reaction of benzoyl fluorides with alkyl boronic acids to synthetic ketone was revealed by cooperative N-heterocyclic carbene (NHC) and photoredox catalysis. Various alkyl boric acids can be converted into alkyl radicals without external oxidants or activators. Moreover, the catalytic system was feasible for the difunctionalization of styrenes via a radical relay process. Mechanistic