US4245106A
Expired / Lapsed
US
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Process for the preparation of 1-alkyl-3-aryl-4-pyrazolecarboxylates
Assignee: Monsanto Co
•
Filing: 1979-07-05
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Granted: 1981-01-13
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Expires: 1999-07-05
Abstract
Abstract This invention relates to a process for preparing pyrazole carboxylates having the formula <IMAGE>
Inventors
- 👤 Lawrence H. Brannigan
- 👤 John E. Franz
- 👤 Robert K. Howe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:53
CPC Classifications
A; A01; A01N; A01N43/00; A01N43/48; A01N43/56; C; C07; C07D; C07D231/00; C07D231/02; C07D231/10; C07D231/14
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
116 words
A method for the preparation of a compound of the formula ##STR18## wherein R is selected from the group consisting of hydrogen, agriculturally acceptable cations, alkyl having from 1 to 8 carbon atoms, phenoxy lower alkyl, lower alkyl thio lower alkyl and tetrafluorocyclobutylmethyl; R 1 is lower alkyl; and X and Y are independently selected from the group consisting of hydrogen, trifluoromethyl, halo, lower alkyl and lower alkoxy; provided that X, Y and R may not simultaneously be hydrogen; which comprises reacting in the presence of acetic acid, a propenoic acid or ester having the formula ##STR19## and a hydrazine having the formula ##STR20## wherein R, R 1 , X and Y are as defined above.
Claim 2
Independent Claim
116 words
A method for the preparation of a compound of the formula ##STR18## wherein R is selected from the group consisting of hydrogen, agriculturally acceptable cations, alkyl having from 1 to 8 carbon atoms, phenoxy lower alkyl, lower alkyl thio lower alkyl and tetrafluorocyclobutylmethyl; R 1 is lower alkyl; and X and Y are independently selected from the group consisting of hydrogen, trifluoromethyl, halo, lower alkyl and lower alkoxy; provided that X, Y and R may not simultaneously be hydrogen; which comprises reacting in the presence of acetic acid, a propenoic acid or ester having the formula ##STR19## and a hydrazine having the formula ##STR20## wherein R, R 1 , X and Y are as defined above.
Claim 3
Dependent Claim
17 words
A method in accordance with claim 1 wherein R is alkyl having 1 to 8 carbon atoms.
Claim 4
Dependent Claim
11 words
A method in accordance with claim 1 wherein R is ethyl.
Claim 5
Dependent Claim
15 words
A method in accordance with claim 3 wherein R 1 is methyl, n-propyl or isopropyl.
References Cited (Backward Citations)
US3023210A
Cited
US3234217A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-01-13 | 1984-07-14 | 1985-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-13 | 1988-07-14 | 1989-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-13 | 1992-07-14 | 1993-01-13 | $7700.00 | Window Closed / Lapsed |