Organic compounds -- part of the class 532-570 series – Organic compounds – Azo
Patent
1989-12-26
1991-04-23
Higel, Floyd D.
Organic compounds -- part of the class 532-570 series
Organic compounds
Azo
5262181, 526219, 534838, 534886, 534887, 534587, 534583, C07C24504, C08F 404
Patent
active
050101781
ABSTRACT:
Disclosed are processes for the preparation of mixed azodinitriles initiators of the formulae ##STR1## These initiators are prepared by reacting a keto acid of the formula ##STR2## with M(CN).sub.x, a hydrazine source, a ketone of the formula ##STR3## and hydrochloric acid to form ##STR4## The hydrazo intermediates are reacted with chlorine gas in the presence of acetone solvent to oxidize the mixture of hydrazo intermediates to the mixed azonitrile initiators. R.sub.1 is an alkyl group containing from about 1 to about 12 carbon atoms, R.sub.2 is non-existent or an alkylene group containing from 1 to about 12 carbon atoms, or a cycloalkylene or alkyl cycloalkylene group containing from about 3 to about 12 carbon atoms, R.sub.3 and R.sub.4 are alkyl groups containing from 1 to about 12 carbon atoms, or one of R.sub.3 and R.sub.4 is an alkoxy group containing from 1 to about 4 carbon atoms and M is a metal comprising lithium, sodium, potassium, magnesium, or calcium.
REFERENCES:
patent: 4039527 (1977-08-01), Nagaoka et al.
Higel Floyd D.
Hudak Daniel J.
The B. F. Goodrich Company
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