Selective catalytic hydrogenation of the pyridine ring in arylpyridines and condensed pyridine systems (review)

Data are summarized concerning selective hydrogenation of the pyridine ring in arylpyridines, including those containing silicon, and in annelated pyridines. An effective catalyst, rhenium heptasulfide, has been found, which makes it possible to reduce the pyridine ring without affecting the benzene rings. © 1993 Plenum Publishing Corporation.