Process for the preparation of piperonylidenecrotonic acid amides
US4209446A · kind A · utility
7Cited by
2References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 13, 1978 |
| Grant date | Jun 24, 1980 |
| Priority date | — |
| Expiry date | Dec 13, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D317/60
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Process for the preparation of piperonylidenecrotonic acid amides of the formula ##STR1## in which R.sub.1 and R.sub.2 have the meaning given in the disclosure wherein piperonal is reacted with crotonic acid amides of the formula ##STR2## in the presence of alkali metal hydroxides and dipolar aprotic diluents which are inert under the reaction conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.