Preparation of herbicides containing a phosphonate group from intermediate benzoxazines
US4755614A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 20, 1986 |
| Grant date | Jul 5, 1988 |
| Priority date | — |
| Expiry date | Mar 20, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/3813
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Preparation of intermediates for herbicides of formula ##STR1## by the reaction of organic phosphites with benzoxazines of formula EQU Bzx--CH.sub.2 --CO--Y (II) in which PA0 Bzx denotes the radical of formula: ##STR2## X is a usual substituent of phenols n is an integer from 0 to 4 PA0 R.sup.1 and R.sup.2 are H or such that OR.sup.1 and OR.sup.2 are hydrolyzable PA0 Y is --OM or --NR.sup.3 R.sup.4 PA0 M is H or is such that COOM is a salt or an ester PA0 R.sup.3 and R.sup.4 are H or a hydrocarbon radical, and one of them can be R.sup.5 --SO.sub.2 --, and PA0 R.sup.5 is a hydrocarbon radical, substiuted if appropriate. Products obtained by the process and their use as herbicides.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.