# US 4,397,790 A · Isophosphinolinone derivatives

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- Number: US 4,397,790 A
- Document ID: US4397790A
- Status: Granted
- Kind: A
- Application number: 06/212,381
- Filed: 1980-12-03
- Granted: 1983-08-09
- Earliest claimed: 1980-12-03
- Assignees: Monsanto Company
- Inventors: John A. Houbion
- Web page: https://patentgrep.com/patent/US4397790A

## CPC

- A01N 57/36: having phosphorus as a ring member
- C07F 9/3241: {Esters of arylalkanephosphinic acids}
- C07F 9/65681: {the ring phosphorus atom being part of a (thio)phosphinic acid or ester thereof}
- A01N: PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF (preservation of food or foodstuff A23); BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES (preparations for medical, dental or toiletry purposes which kill or prevent the growth or proliferation of unwanted organisms A61K); PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- C07F: ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM (metal-containing porphyrins C07D487/22)

## Abstract

This invention relates to a new class of organic chemical compounds. More particularly this invention is concerned with derivatives of isophosphinolinone. Compounds of this invention may be employed as active ingredients in herbicides and/or as intermediates in the preparation of other isophosphinolinone derivatives useful to reduce herbicidal injury to treated crop plants.

## Claims

### Claim 1

A compound of the formula ##STR12## wherein X is independently selected from the group consisting of bromine, chlorine, iodine, fluorine, hydroxy, linear alkyl having 1 to 4 carbon atoms, linear alkoxy having 1 to 4 carbon atoms, nitro, cyano and CF.sub.3,
n is an integer from 1 to 4,
R.sub.1 is alkyl having 1 to 4 carbon atoms,
R.sub.2 is selected from the group consisting of alkenyl having 1 to 4 carbon atoms, haloalkyl having 1 to 4 carbon atoms, ##STR13## wherein R.sub.3 is independently selected from the group consisting of linear alkyl having 1 to 4 carbon atoms, CF.sub.3, fluorine, chlorine, bromine, iodine and linear alkoxy having 1 to 4 carbon atoms, nitro and wherein n.sub.1 is an integer from 1 to 5.

### Claim 2 (depends on 1)

A compound of claim 1, wherein X is chlorine in the 8-position, n is 1, R.sub.1 is ethyl, and R.sub.2 is ##STR14##