1-(4'-Diazoniumphenyl)-pyridinium salts and the process of prepa

Details 1-(4'-Diazoniumphenyl)-pyridinium salts and the process of prepa 1-(4'-Diazoniumphenyl)-pyridinium salts and the process of prepa

1974-10-15

1976-10-12

Higel, Floyd D.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260156, C07C11300, C09B 2912, C09B 2936, D06P 104

Patent

active

039857247

ABSTRACT:
Novel diazonium compounds and methods for their preparation are disclosed. Specifically, 1-(4'-diazoniumphenyl)-1,2-dihydro pyrid-2-imino-sulfinate is prepared by rearrangement of 2-(4'-diazobenzene-sulfonylamino)-pyridine, and 1-(4'-diazoniumphenyl)-2-amino-pyridinium salts are obtained by reaction of 1-(4'-diazoniumphenyl)-1,2-dihydro-pyrid-2-imino-sulfinate with aqueous acids. The novel compounds are useful as precursors for azo dyestuffs.

REFERENCES:
patent: 3539347 (1970-11-01), Rauhut
patent: 3748140 (1973-07-01), Frommeld et al.
patent: 3804823 (1974-04-01), Fisher et al.

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