Unsymmetrical aliphatic monoazo compounds
US3931143A · kind A · utility
9Cited by
9References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 1, 1971 |
| Grant date | Jan 6, 1976 |
| Priority date | — |
| Expiry date | Jun 1, 1991 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B43/40
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.