Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
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.
Misumi Teruyuki
Shiga Masaaki
Tanaka Takashi
Asahi Kasei Kogyo Kabushiki Kaisha
Randolph John D.
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