Method for preparing hydrazo-bis-acetonitriles
US3984451A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 21, 1975 |
| Grant date | Oct 5, 1976 |
| Priority date | — |
| Expiry date | May 21, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C255/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
This invention relates to a method for preparing hydrazo-bis-acetonitriles of the general formula: ##EQU1## wherein R.sub.1 and R.sub.2 have the same meaning hereinafter given, which comprises: PA1 A. i. reacting a carbonyl compound of the general formula: ##EQU2## wherein R.sub.1 and R.sub.2 have the same meaning hereinafter given, with ammonia and hydrogen peroxide in the presence of cyanogen or a nitrile of the formula EQU R.sub.3 (CN).sub.n (III) PA1 wherein n is an integer from 1 to 6 and R.sub.3 is an unsubstituted or substituted saturated aliphatic, acyclic or cyclic radical of from 1 to 12 carbon atoms or a benzenyl or pyridinyl radical, to form a symmetrical azine of the formula ##EQU3## ii. oxidizing a secondary alcohol of ##EQU4## wherein R.sub.1 and R.sub.2 have the same meaning hereinafter given, at a temperature and pressure which is sufficient to maintain the alcohol in the liquid phase and result in a liquid phase mixture containing the peroxidic products of the auto-oxidation of the alcohol [v] and reacting auto-oxidation products with ammonia and cyanogen or the nitrile R.sub.3 (CN).sub.n of formula (III) to form the symmetrical azine of formula (IV) PA1 b. elimin…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.