Process of making phenylacrylic esters
US4309350A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 24, 1980 |
| Grant date | Jan 5, 1982 |
| Priority date | — |
| Expiry date | Jan 24, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D317/60
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The (+), (-) and (.+-.) forms of the compounds of formula I ##STR1## wherein R.sup.1 is hydrogen or a methoxy, ethoxy, propoxy, methylthio, ethylthio, propylthio, fluoro, chloro, bromo, methyl, ethyl, nitro or amino group, and PA0 R.sup.2 is a hydrogen or methyl group or R.sup.1 and R.sup.2 together form a methylenedioxy group; PA0 R.sup.3 is hydrogen, or a lower alkyl group, or one of the following groups (a) to (d): PA1 (a) m-phenoxybenzyl, PA1 (b) 2-benzyl-4-furylmethyl PA1 (c) .alpha.-cyano-m-phenoxybenzyl PA1 (d) 3-4-methylenedioxy-benzyl, PA0 and R.sup.4 and R.sup.5 are the same or different groups and each is a fluoro, bromo, chloro or methyl group. The compounds of formula I in which R.sup.3 is one of groups (a) to (d) are extremely active as insecticides (except when R.sup.1 is an amino group). The compounds also possess the property of contact repellency to insects.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.