Patent US3878222A successfully refreshed from Google Patents.
US3878222A
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Methods of preparing substituted imidazothiazolium compounds
Assignee: Wyeth Holdings LLC
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Filing: 1972-11-22
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Granted: 1975-04-15
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Expires: 1992-11-22
Abstract
Abstract The preparation of acyl substituted phenylimidazo(2,1b)thiazoles is described. They are prepared by acylation of phenylimidazo(2,1-b)thiazoles with an acyl halide or anhydride. They can also be prepared by cyclization of the appropriate substituted thiazole to produce the desired phenylimidazo( 2,1b)thiazoles. The latter compounds are useful for the control of helminths in warm-blooded animals.
Inventors
- 👤 Larry Dean Spicer
- 👤 John James Hand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:46
CPC Classifications
C; C07; C07D; C07D277/00; C07D277/02; C07D277/20; C07D277/32; C07D277/38; C07D277/44; C07D277/46
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
10 words
A METHOD FOR THE PREPARATION OF COMPOUNDS OF THE FORMULA:
Claim 2
Independent Claim
10 words
A METHOD FOR THE PREPARATION OF COMPOUNDS OF THE FORMULA:
Claim 3
Dependent Claim
17 words
A method according to claim 1, wherein R1 is alkyl (C1-C17) and R2 is lower alkyl phenyl.
Claim 4
Dependent Claim
17 words
A method according to claim 1, wherein R1 is lower alkoxy (C1 -C4) and R2 is trifluoromethyl.
Claim 5
Dependent Claim
16 words
A method according to claim 1, wherein R1 is halophenyl and R2 is alkanoyl (C1-C4) amino.
Claim 6
Dependent Claim
14 words
A method according to claim 1, wherein R1 is methyl and R2 is hydrogen.
Claim 7
Dependent Claim
24 words
In a method according to claim 1, the step of heating 2,N-(3-( Beta -hydroxyphenethyl)-4-triazoline-2-ylidene)acetamide with acetic anhydride at refluxing temperature and recovering 7-acetyl-6,7-dihydro-6-phenyl-5H-imidazo(2,1-b)thiazolium chloride.
Claim 8
Dependent Claim
12 words
A method according to claim 1, wherein a compound of the formula:
References Cited (Backward Citations)
US3274209A
Cited
US3708490A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |