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US 3,931,143 AGranted
Unsymmetrical aliphatic monoazo compounds
AssigneePennwalt Corporation
InventorsRonald Edward MacLeay, Chester Stephen Sheppard
Life of this patent
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Abstract
Unsymmetrical azo compounds: ##EQU1## where (R").sub.3 C-- is tertiary-aliphatic and Z is cyano or a derivative thereof, e.g., 2-t-butylazo-2-cyanopropane; processes for preparing such azo compounds by (a) adding hydrocyanic acid to a preformed hydrazone, ##EQU2## of a ketone to form a hydrazo compound, and oxidizing the hydrazo compound; or (b) oxidizing the hydrazo compound formed by the reaction of a t-aliphatic hydrazine with hydrogen or alkali metal cyanide in water.
Claims13
A compound having the formula ##EQU49## where:
- a. R" is alkyl of 1-13 carbons, aralkyl of 7-12 carbons or phenyl, not more than one R" being phenyl;
- b. R.sub.1 and R.sub.2 are alkyl or substituted alkyl of 1-20 carbons, cycloalkyl or bicycloalkyl of 3-10 carbons or, taken together, form an alkylene diradical of 2-16 carbons, and R.sub.2 can also be phenyl or substituted phenyl, the alkyl and phenyl substituents being selected from lower alkoxy, phenoxy, lower alkyl-substituted phenoxy, carboxy, hydroxy, lower alkoxycarbonyl, phenylcarbonyloxy, lower alkylcarbonyloxy, halogen, cyano and lower alkylsulfonato, and the phenyl substituents being further selected from lower alkyl;
- and
- c. Z is --CN, --C(O)NH.sub.2 or --C(NOH)NH.sub.2.
1 more element
Dependencies are inferred from the claim text.