US3093650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alternative synthesis of
Assignee: —
•
Filing: —
•
Granted: 1963-06-11
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Expires: 1980-06-11
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:00
CPC Classifications
C; C07; C07D; C07D221/00; C07D221/02; C07D221/22; C07D221/26; C07D211/00; C07D211/04; C07D211/68; C07D211/70
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
66 words
A METHOD OF PRODUCING A 2-BENZYL,-1,2,5,6-TETRAHYDROPYRIDINE BASE WHICH ESSENTIALLY COMPRISES (A) REDUCING A PYRIDINIUM HALIDE WITH SODIUM BOROHYDRIDE TO PRODUCE A 1,2,5,6-TETRAHYDROPYRIDINE BASE, (B) REACTING SAID TETRAHYDROPYRIDINE BASE WITH A BENZYL HALIDE TO FORM AN N-BENZYL QUATERNARY 1,2,5,6-TETRAHYDROPYRIDINE SALT, AND (C) REACTING SAID TETRAHYDROPYRIDINE SALT WITH ETHEREAL PHENYLLITHIUM FOR A SUFFICIENT TIME TO INDUCE SHIFT OF THE BENZYL SUBSTITUENT TO THE 2-POSITION OF THE 1,2, 5,6-TETRAHYDROPYRIDINE.
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) | 1966-06-10 | 1966-12-10 | 1967-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-10 | 1970-12-10 | 1971-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-10 | 1974-12-10 | 1975-06-11 | $7700.00 | Window Closed / Lapsed |