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US4056384A Expired / Lapsed US ⏱️ 0.0 years remaining

Pesticidal dihydrotetrazolo [1,5-a] quinazolines and pesticidal uses thereof

Assignee: Imperial Chemical Industries Ltd
•
Filing: 1975-08-25
•
Granted: 1977-11-01
•
Expires: 1995-08-25
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Abstract

Abstract Dihydrotetrazolo [1,5-a] quinazolines having the formula <IMAGE> wherein (a) n is zero, X is oxygen, and R is optionally unsubstituted alkyl, alkenyl of at least 4 carbon atoms, alkynyl, aryl, aralkyl, alkylthio, cycloalkyl, amino or substituted aryl; or (b) n is 1 or 2, X is oxygen, R is hydrogen, or optionally-substituted alkyl, alkenyl, alkynyl, aryl, aralkyl, alkylthio, cycloalkyl, or amino, and R1 is hydroxy, halogen, nitro, alkyl or alkoxy or (c) n is zero, 1 or 2, X is sulphur, R is hydrogen, or optionally-substituted alkyl, alkenyl, alkynyl, aryl, aralkyl, alkylthio, cycloalkyl, or amino, and R1 is hydroxy, halogen, nitro, alkyl or alkoxy; or (d) n is 0, 1 or 2, X is NR2 where R2 is hydrogen, alkyl having 1 to 10 carbon atoms, benzyl or hydroxyalkyl, R is optionally-substituted alkyl, alkenyl, alkynyl, aryl, aralkyl, alkylthio, cycloalkyl, or amino, and R1 is hydroxy, halogen, nitro, alkyl or alkoxy; and salts thereof. These compounds demonstrate pesticidal activity.

Inventors

  • 👤 Raymond Alexander Bowie
  • 👤 John Michael Cox
  • 👤 Gordon Michael Farrell
  • 👤 Margaret Claire Shephard

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-06 00:17
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/02; C07D487/04

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 53 words
A process for combating the disease Piricularia oryzae, rice blast, which comprises applying to rice seeds, rice plants, the roots of rice plants, or to their locus within or remote from a germination or growing environment, an effective amount of a dihydrotetrazolo[1,5-a]quinazoline having the structural formula: ##STR43## and chemical name: 4 methyl-4,5-dihydro tetrazol[1,5-a]quinazolin-5-one.
Claim 2
Dependent Claim 53 words
A process for combating the disease Piricularia oryzae, rice blast, which comprises applying to rice seeds, rice plants, the roots of rice plants, or to their locus within or remote from a germination or growing environment, an effective amount of a dihydrotetrazolo[1,5-a]quinazoline having the structural formula: ##STR43## and chemical name: 4 methyl-4,5-dihydro tetrazol[1,5-a]quinazolin-5-one.
Claim 3
Dependent Claim 52 words
A process for combating the disease Piricularia oryzae, rice blast, which comprises applying to rice seeds, rice plants, the roots of rice plants, or to their locus within or remote from a germination or growing environment, an effective amount of a dihydrotetrazolo[1,5-a]quinazoline having the structural formula: ##STR44## and chemical name: 4-methyl-4,5-dihydrotetrazolo [1,5-a]quinazolin-5-thione.
Claim 4
Dependent Claim 52 words
A process for combating the disease Piricularia oryzae, rice blast, which comprises applying to rice seeds, rice plants, the roots of rice plants, or to their locus within or remote from a germination or growing environment, an effective amount of a dihydrotetrazolo[1,5-a]quinazoline having the structural formula: ##STR44## and chemical name: 4-methyl-4,5-dihydrotetrazolo [1,5-a]quinazolin-5-thione.

References Cited (Backward Citations)

US3835137A Cited
US3835138A Cited
US3838126A Cited
US3920654A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1980-10-31 1981-05-02 1981-11-01 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1984-10-31 1985-05-02 1985-11-01 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1988-10-31 1989-05-02 1989-11-01 $7700.00 Window Closed / Lapsed

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