Improved process and catalyst for the preparation of 2,2' bipyri

Details Improved process and catalyst for the preparation of 2,2' bipyri Improved process and catalyst for the preparation of 2,2' bipyri

1992-06-09

1993-06-22

Springer, David B.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

546257, C07D40104

Patent

active

052217477

ABSTRACT:
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.degree.-240.degree. 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.degree.-240.degree. C. These latter processes require that the nickel have a high specific Ni surface area.

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