Patent US1498935A successfully refreshed from Google Patents.
Patent US3849407A successfully refreshed from Google Patents.
US3849407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
5-benzyl pyrimidines intermediates
Assignee: SmithKline Beecham Corp
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Filing: 1972-09-08
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Granted: 1974-11-19
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Expires: 1992-09-08
Abstract
Abstract 1. IN THE METHOD OF PREPARING A COMPOUND OF FORMULA I R1,R2,R3,R4-PHENYL-CH2-C(-CN)=CH-N(-R6)-R5 WHERE R1-R4 ARE THE SAME OR DIFFERENT, AND EACH IS A HYDROGEN OR HALOGEN ATOM, LOWER ALKYL, LOWER ALKOXY OR BENZYLOXY, OR R3 AND R4 TAKEN TOGETHER MAY BE A METHYLENEDIOXY GROUP WHEN BOTH R1 AND R2 ARE HYDROGEN ATOMS AND WHEREIN THE B-AMINO GROUP NR5R6 IS A PRIMARY AMINO GROUP OTHER THAN ANILINO OR IS A SECONDARY AMINO GROUP, BY COMBINING THE CORRESPONDING B-ALKOXY-A-BENZYLIDENEPROPIONITRILE WITH AN EXCESS OF THE APPROPRIATE AMINE IN THE PRESENCE OF A BASE IN AN ALKANOL.
Inventors
- 👤 R Cresswell
- 👤 J Mentha
- 👤 R Seaman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:02
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/24; C07D239/28; C07D239/46; C07D239/48; C07D239/49; C07C; C07C255/00; C07C317/00; C07D295/00; C07D295/04; C07D295/14; C07D295/145; C07D317/00; C07D317/08; C07D317/44; C07D317/46; C07D317/48; C07D317/50; C07D317/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
IN THE METHOD OF PREPARING A COMPOUND OF FORMULA I
Claim 2
Dependent Claim
10 words
IN THE METHOD OF PREPARING A COMPOUND OF FORMULA I
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) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |