Organic compounds -- part of the class 532-570 series – Organic compounds – Azo
Patent
1989-12-26
1991-08-06
Higel, Floyd D.
Organic compounds -- part of the class 532-570 series
Organic compounds
Azo
5262181, 526219, 534583, 534586, 534838, 534886, 534887, C07C24504, C08F 404
Patent
active
050379631
ABSTRACT:
The preparation of symmetrical azodinitriles prepared from keto acids is disclosed. A keto acid of the formula ##STR1## is reacted with M(CN).sub.x and an ammonia source to obtain an aminonitrile metal carboxylate of the formula ##STR2## The aminonitrile metal carboxylate is reacted with M.sub.1 (OCl).sub.x with the proviso that no alcohol or surface active agent is utilized to form a metal salt of an azo compound. This metal salt is reacted with mineral acid to give the symmetrical azodinitrile compound of the formula ##STR3## R.sub.1 is an alkyl group containing from 1 to about 12 carbon atoms and R.sub.2 is an alkylene group containing from 1 to about 12 carbon atoms. M is a metal comprising lithium, sodium, potassium, magnesium or calcium; M.sub.1 is a metal comprising sodium, potassium or calcium; and x is the valence of M and M.sub.1.
REFERENCES:
patent: 3541132 (1970-11-01), Knowles
patent: 3783148 (1974-01-01), Fuchs
patent: 4028345 (1977-06-01), Moore, Jr.
patent: 4252717 (1981-02-01), Wake et al.
Higel Floyd D.
Hudak Daniel J.
The B. F. Goodrich Company
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