Process for preparation of N,N'-disubstituted-4,4'-bipyridylium

Details Process for preparation of N,N'-disubstituted-4,4'-bipyridylium Process for preparation of N,N'-disubstituted-4,4'-bipyridylium

1978-03-23

1979-04-24

Randolph, John D.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

546258, C07D21322

Patent

active

041511654

ABSTRACT:
A novel process for the preparation of an N,N'-disubstitued-4,4'-bipyridylium salt, characterized in that an N,N'-disubstitued tetrahydro-4,4'-bipyridyl corresponding to the desired salt is treated with at least one aromatic nitro compound in the presence of water. The process of the present invention is more advantageously effected further in the presence of a water-immiscible organic solvent. According to the present invention, the desired product can be obtained with high purity and in high yield.

REFERENCES:
patent: 3696113 (1972-10-01), Colchester et al.
patent: 3714174 (1973-01-01), Colchester et al.
patent: 3716546 (1973-02-01), Colchester
patent: 3864352 (1975-02-01), Colchester et al.

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