US3819629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing 2,4-diamino-5-(3,4,5-trimethoxybenzyl)pyrimidine
Assignee: SmithKline Beecham Corp
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Filing: 1971-08-06
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Granted: 1974-06-25
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Expires: 1991-08-06
Abstract
Abstract THE METHOD OF PREPARING A COMPOUND I 2,4-DI(NH2-),5-((3,5-DI(CH3-O-),4-HO-PHENYL)-CH2-)- PYRIMIDINE WHREIN R IS AN ALKYL GROUP, OR AN UNSATURATED ALKYL GROUP, AND WHEREIN THE ALKYL GROUPS MAY ALSO BEAR HALOGEN SUBSTITUTION BY REACTING A COMPOUND II 2,4-DI(NH2-),5-((3,5-DI(CH3-O-),4-HO-PHENYL)-CH2-)- PYRIMIDINE WITH AN ALKYL HALIDE WHEREIN R IS DEFINED AS ABOVE. THE INVENTION ALSO COMPRISES COMPOUNDS OF FORMULA (I) WHEREIN R'' IS SELECTED FROM THE CLASS CONSISTING OF AN ALKYL GROUP HAVING A HALOGEN SUBSTITUTION AND AN UNSATURATED ALKYL GROUP. ADDITIONALLY, THE TERM R IN THE FORMULAS ABOVE MAY BE AN ARALKYL GROUP OR AN ALKYL OR ALKOXY SUBSTITUTED ARALKYL GROUP.
Inventors
- 👤 B Roth
- 👤 J Strelitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:50
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/24; C07D239/28; C07D239/46; C07D239/48; C07D239/49
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |