Chromene derivatives and pesticidal composition comprising the same
US4866089A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 3, 1988 |
| Grant date | Sep 12, 1989 |
| Priority date | — |
| Expiry date | Mar 3, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D311/70
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a process for the preparation of chromenes of the general Formula V ##STR1## (wherein R.sup.1 and R.sup.2 are hydrogen, optionally halogeno substituted C.sub.1-6 alkyl or aryl; PA0 R.sup.3 and R.sup.7 stand for hydrogen, halogen or C.sub.1-6 alkyl; PA0 R.sup.4 represents C.sub.1-8 alkyl, aryl, aralkyl or a group containing a carbonyl group; PA0 R.sup.5 and R.sup.6 stand for C.sub.1-10 alkyl, aryl, amino, hydroxyalkyl, alkoxyalkenyl, alkylmercaptoalkyl, acyl, carboxy or an ester group or a halogen atom; PA0 n is 0 or 1) which comprises PA1 (a) for the preparation of compounds, in which R.sup.5 and R.sup.6 stand for different groups, reacting a compound of the general Formula I ##STR2## with an approximately equimolar, preferably 0.8-1.5 molar amount of a reactant of the general Formula R.sup.5 --X-related to the amount of the compound of the general Formula I (wherein R.sup.5 has the same meaning as stated above X is halogen) and reacting the O-monosubstituted compound of the general Formula III ##STR3## (wherein R.sup.1 -R.sup.6 and n are as stated above) obtained with a 1.1-1.5 molar amount of a compound of the general Formula III (wherein R.sup.6 and X ar…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.