Process for the preparation of pyrryl-2-acetonitrile
US4374256A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 2, 1979 |
| Grant date | Feb 15, 1983 |
| Priority date | — |
| Expiry date | Feb 2, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D207/337
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Pyrryl-2-acetonitriles corresponding to the formula ##STR1## in which R.sub.1 stands for hydrogen or an alkyl group having 1-4 carbon atoms prepared from dialkyl-(pyrryl-2-methyl)-amine corresponding to the formula ##STR2## in which R.sub.1 is defined as above and R.sub.2 and R.sub.3 stand for alkyl groups having 1-4 carbon atoms, are alkylated with alkyl halides such as methyl chloride or methyl bromide to form the corresponding trialkyl-(pyrryl-2-methyl)-ammonium chloride quaternary salts and then reacted with an aqueous solution of alkali cyanide in the presence of a water-immiscible solvent under conditions which provide more economical utilization of reactants and process equipment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.