US3849470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
5-benzyl pyrimidines intermediates therefore,and method
Assignee: SmithKline Beecham Corp
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Filing: 1972-06-12
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Granted: 1974-11-19
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Expires: 1992-06-12
Abstract
Abstract 1. IN THE METHOD OF PREPARING A COMPOUND OF FORMULA I R1,R2,R3,R4-PHENYL-CH2-C(-CN)=CH-OH WHICH COMPRISES TREATING WITH AN ACID A PARTIALLY AQUEOUS SOLUTION OF A COMPOUND OF FORMULA II R1,R2,R3,R4-PHENYL-CH2-C(-CN)=CH-N(-R5)-R6 WHEREIN 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 R1 AND R2 ARE HYDROGEN ATOMS AND WHEREIN R5 IS LOWER ALKYL AND R6 IS LOWER ALKYL OR HYDROGEN OR NR5R6 IS CYCLIC AMINO GROUP OF NOT LESS THAN ONE CARBON ATOM OR MORE THAN TWELVE CARBON ATOMS.
Inventors
- 👤 R Cresswell
- 👤 J Mentha
- 👤 R Seaman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:08
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 |