US3726894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
The compound 1-(2-hydroxyethyl)-4-phenyl-2-imidazolidinethione
Assignee: Wyeth Holdings LLC
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Filing: 1971-06-24
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Granted: 1973-04-10
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Expires: 1991-06-24
Abstract
Abstract A PROCESS FOR PREPARING DL-6-PHENYL-2,3,5,6-TETRAHYDROIMIDAZO(2,1-B)THIAZOLE HYDROCHLORIDE BY CONTACTING 4PHENYL-1-VINYL-2-IMIDAZOLIDINETHIONE WITH DIBORANE, OXIDIZING THE RESULTING PRODUCT IN AQUEOUS BASE TO PRODUCE 1(2-HYDROXYETHYL)-4-PHENYL - 2 - IMIDAZOLIDINETHIONE, CONVERTING THE HYDROXYETHYL GROUPING TO HALOETHYL AND CYCLIZING TO GIVE DL-6-PHENYL-2,3,5,6-TETRAHYDROMIDAZO(2,1-B) THIAZOLE HYDROHALIDE IS DESCRIBED. THE PRODUCTS OF THE INVENTION ARE USEFUL AS HIGHLY EFFECTIVE ANTHELMINTIC AGENTS.
Inventors
- 👤 L Spicer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:03
CPC Classifications
C; C07; C07D; C07D513/00; C07D513/02; C07D513/04; C07D233/00; C07D233/04; C07D233/28; C07D233/30; C07D233/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |