Processes and catalysts for the preparation of 2,2'-bipyridyls

Details Processes and catalysts for the preparation of 2,2'-bipyridyls Processes and catalysts for the preparation of 2,2'-bipyridyls

C - Chemistry, Metallurgy

07

D

C07D 213/22 (2006.01)

Patent

CA 2047089

Processes for the preparation of 2,2'-bipyridyls by reacting a pyridine base in the presence of a nickel catalyst which comprises a significant amount of elemental nickel bound on a suitable support. In one embodiment the coupling reaction takes place in several reactor designs at a temperature of about 200-240°C and a pressure sufficient to maintain at least some of the base in a liquid state during the reaction. In other preferred embodiments, processes for preparing 2,2'-bipyridyls are conducted at a temperature between about 175-240°C. These latter processes require that the nickel have a high specific Ni surface area.

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