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The carbonylative Suzuki cross-coupling of a variety of mono-iodopyridines and bromopyridines (1a,b, 3a-c, 5) catalyzed by palladium-phosphane systems has been studied to prepare benzoylpyridine derivatives (2, 4, 6). The selectivity and the rate of the reaction are highly dependent on the reaction conditions, i.e. nature of the palladium catalyst precursor, solvent, temperature and CO pressure. The...
The proper choice of solvent, catalyst precursor and CO pressure enables the easy and selective transformation of mono- and dihalopyridines into phenyl pyridyl ketones in 81-95% yields.
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