# US 4,391,625 A · Diesters of N-alkyl substituted amino methyl phosphonic acid useful as herbicides

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- Number: US 4,391,625 A
- Document ID: US4391625A
- Status: Granted
- Kind: A
- Application number: 06/275,463
- Filed: 1981-06-19
- Granted: 1983-07-05
- Earliest claimed: 1981-06-19
- Assignees: Monsanto Company
- Inventors: William R. Purdum
- Web page: https://patentgrep.com/patent/US4391625A

## CPC

- C07F 9/655345: {the sulfur atom being part of a five-membered ring}
- A01N 57/18: having phosphorus-to-carbon bonds (A01N57/02 takes precedence)
- C07F 9/4006: {Esters of acyclic acids which can have further substituents on alkyl}
- C07F 9/572: Five-membered rings
- C07F: ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM (metal-containing porphyrins C07D487/22)
- 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

## Abstract

Diesters of N-alkyl substituted amino methyl phosphonic acid are disclosed which are useful as herbicides. This invention further relates to herbicidal compositions containing such diesters and to herbicidal methods employing such compounds and compositions.

## Claims

### Claim 1

Diesters of N-alkyl substituted amino methyl phosphonic acid of the formula ##STR8## wherein Z is ##STR9## wherein R is lower alkyl; or Z is lower alkynyl or lower alkyl; R.sub.1 is selected from the group consisting of lower alkyl, lower alkoxy lower alkyl, halo lower alkyl, and phenyl lower alkyl, and R.sub.2 is hydrogen or lower alkyl.

### Claim 2 (depends on 1)

The diester of claim 1, wherein R is ethyl.

### Claim 3 (depends on 2)

The diester of claim 2, wherein R.sub.1 is lower alkyl.

### Claim 4 (depends on 3)

The diester of claim 3 wherein R.sub.1 is lower alkyl and R.sub.2 is lower alkyl or hydrogen.

### Claim 5 (depends on 4)

The diester of claim 4, wherein R.sub.1 is methyl and R.sub.2 is hydrogen.

### Claim 6 (depends on 4)

The diester of claim 4, wherein R.sub.1 is ethyl and R.sub.2 is hydrogen.

### Claim 7 (depends on 4)

The diester of claim 4, wherein both R.sub.1 and R.sub.2 are methyl.

### Claim 8 (depends on 1)

The diester of claim 1, wherein Z is lower alkynyl.

### Claim 9 (depends on 8)

The diester of claim 8, wherein Z is --CH.sub.2 C.tbd.CH.

### Claim 10 (depends on 1)

The diester of claim 1, wherein Z is lower alkyl.

### Claim 11 (depends on 10)

The diester of claim 10, wherein Z is --C(CH.sub.3).sub.3.

### Claim 12 (depends on 1)

A herbicidal composition comprising a herbicidally effective amount of a compound of claim 1, together with an inert diluent.

### Claim 13 (depends on 2)

A herbicidal composition comprising a herbicidally effective amount of a compound of claim 2, together with an inert diluent.

### Claim 14 (depends on 3)

A herbicidal composition comprising a herbicidally effective amount of a compound of claim 3, together with an inert diluent.

### Claim 15 (depends on 4)

A herbicidal composition comprising a herbicidally effective amount of a compound of claim 4, together with an inert diluent.

### Claim 16 (depends on 5)

A herbicidal composition comprising a herbicidally effective amount of a compound of claim 5, together with an inert diluent.

### Claim 17 (depends on 6)

A herbicidal composition comprising a herbicidally effective amount of a compound of claim 6, together with an inert diluent.

### Claim 18 (depends on 7)

A herbicidal composition comprising a herbicidally effective amount of a compound of claim 7, together with an inert diluent.

### Claim 19 (depends on 8)

A herbicidal composition comprising a herbicidally effective amount of a compound of claim 8, together with an inert diluent.

### Claim 20 (depends on 9)

A herbicidal composition comprising a herbicidally effective amount of a compound of claim 9, together with an inert diluent.

### Claim 21 (depends on 10)

A herbicidal composition comprising a herbicidally effective amount of a compound of claim 10, together with an inert diluent.

### Claim 22 (depends on 11)

A herbicidal composition comprising a herbicidally effective amount of a compound of claim 11, together with an inert diluent.

### Claim 23 (depends on 12)

A herbicidal composition comprising a herbicidally effective amount of a compound of claim 12, together with an inert diluent.

### Claim 24 (depends on 1)

A herbicidal method which comprises contacting a plant with a herbicidally effective amount of a compound of claim 1.

### Claim 25 (depends on 2)

A herbicidal method which comprises contacting a plant with a herbicidally effective amount of a compound of claim 2.

### Claim 26 (depends on 3)

A herbicidal method which comprises contacting a plant with a herbicidally effective amount of a compound of claim 3.

### Claim 27 (depends on 4)

A herbicidal method which comprises contacting a plant with a herbicidally effective amount of a compound of claim 4.

### Claim 28 (depends on 5)

A herbicidal method which comprises contacting a plant with a herbicidally effective amount of a compound of claim 5.

### Claim 29 (depends on 6)

A herbicidal method which comprises contacting a plant with a herbicidally effective amount of a compound of claim 6.

### Claim 30 (depends on 7)

A herbicidal method which comprises contacting a plant with a herbicidally effective amount of a compound of claim 7.

### Claim 31 (depends on 8)

A herbicidal method which comprises contacting a plant with a herbicidally effective amount of a compound of claim 8.

### Claim 32 (depends on 9)

A herbicidal method which comprises contacting a plant with a herbicidally effective amount of a compound of claim 9.

### Claim 33 (depends on 10)

A herbicidal method which comprises contacting a plant with a herbicidally effective amount of a compound of claim 10.

### Claim 34 (depends on 11)

A herbicidal method which comprises contacting a plant with a herbicidally effective amount of a compound of claim 11.

### Claim 35 (depends on 12)

A herbicidal method which comprises contacting a plant with a herbicidally effective amount of a compound of claim 12.