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US4348221A Expired / Lapsed US ⏱️ 0.0 years remaining

Herbicidal derivatives of pyrid-2-yloxyphenoxy-acetic acids and esters

Assignee: Novartis Corp
•
Filing: 1980-06-16
•
Granted: 1982-09-07
•
Expires: 2000-06-16
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Abstract

Abstract New phenoxy-alkanecarboxylic acid derivatives which have a herbicidal action and which are effective in regulating plant growth are described. They correspond to the formula ##STR1## in which A is the cyano group, a carboxylic acid, a salt, ester, thioester or amide thereof, Q is a mono- to trisubstituted phenyl or pyrid-2-yl radical, R 3 is hydrogen, halogen, cyano, nitro, alkyl or carbamoyl, R 4 is alkyl, alkoxyalkyl, cycloalkyl, alkenyl, alkynyl, phenyl or benzyl, and X, Y and Z are each oxygen or sulfur. They can be used as selective herbicides in cereal and rice crops, or for reducing the vegetative growth, for example in soya-bean crops, and also for defoliation and desiccation in cotton or potato crops shortly before the harvesting thereof.

Inventors

  • 👤 Henry Szczepanski
  • 👤 Otto Rohr
  • 👤 Georg Pissiotas
  • 👤 Beat Bohner
  • 👤 Hermann Rempfler

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-06 14:45
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/62; C07D213/63; C07D213/64; C07D213/643; A; A01; A01N; A01N39/00; A01N39/02; A01N39/04; A01N41/00; A01N41/02; A01N41/04; A01N43/00; A01N43/34; A01N43/40; C07C; C07C255/00; C07C323/00; C07C327/00; C07C59/00; C07C59/40; C07C59/58; C07C59/64; C07C59/66; C07C59/68; C07D213/78; C07D213/84; C07D213/85

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 49 words
A compound of the formula ##STR53## in which R 1 is chlorine or bromine, R 2 is hydrogen, chlorine, bromine or cyano, R 3 is chlorine, bromine or nitro Z is oxygen or sulfur, and R 5 is hydrogen, C 1 -C 3 alkyl, allyl, cyclohexyl, phenyl or benzyl.
Claim 2
Dependent Claim 49 words
A compound of the formula ##STR53## in which R 1 is chlorine or bromine, R 2 is hydrogen, chlorine, bromine or cyano, R 3 is chlorine, bromine or nitro Z is oxygen or sulfur, and R 5 is hydrogen, C 1 -C 3 alkyl, allyl, cyclohexyl, phenyl or benzyl.
Claim 3
Dependent Claim 8 words
2-[3-(3',5'-Dichloropyridyl-2'-oxy)-6-chlorophenoxy]-2-methoxy-acetic acid methyl ester according to claim 1.
Claim 4
Dependent Claim 8 words
2-[3-(3',5'-Dichloropyridyl-2'-oxy)-6-bromophenoxy]-2-methoxy-acetic acid methyl ester according to claim 1.
Claim 5
Dependent Claim 8 words
2-[3-(3',5'-Dichloropyridyl-2'-oxy)-nitrophenoxy]-2-methoxy-acetic acid methyl ester according to claim 1.
Claim 6
Dependent Claim 29 words
A herbicidal and plant growth regulating composition which contains as active substance an effective amount of a pyridyl-phenoxy-alkanecarboxylic acid derivative of claim 1, together with a suitable carrier therefor.
Claim 7
Dependent Claim 33 words
A method for the selective control of weeds in crops of cereals or rice comprising applying thereto or to the locus thereof a herbicidally effective amount of a compound according to claim 1.

References Cited (Backward Citations)

US4046553A Cited
US4134751A Cited
US4133675A Cited
US4213774A Cited
US4235621A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1985-09-06 1986-03-08 1986-09-07 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1989-09-06 1990-03-08 1990-09-07 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1993-09-06 1994-03-08 1994-09-07 $7700.00 Window Closed / Lapsed

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