US3894085A
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New 2-halo nitrones, their manufacture and their use for the manufacture of N-substituted araliphatic aldehyde-nitrones
Assignee: Novartis Corp
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Filing: 1973-09-18
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Granted: 1975-07-08
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Expires: 1993-09-18
Abstract
Abstract Alpha -Halogen-nitrones of the formula wherein Hal is a bromine or preferably a chlorine atom, R1 represents a cycloalkyl or an alkyl radical and R2 is hydrogen or an organic radical. Use as intermediates especially for the substitution of a hydrogen atom in aromatic compounds by the radical D R A W I N G
Inventors
- 👤 Albert Eschenmoser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:21
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/77; C07D307/78; C07D307/79; C07D307/80; C07C; C07C291/00; C07C291/02; C07C45/00; C07C45/51; C07C45/516
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
5 words
NITRONES OF THE GENERAL FORMULA
Claim 2
Dependent Claim
5 words
NITRONES OF THE GENERAL FORMULA
Claim 3
Dependent Claim
28 words
Nitrones of the formula given in claim 1, wherein R1 denotes cycloalkyl with 5 or 6 ring members or lower alkyl and R2 denotes hydrogen or lower alkyl.
Claim 4
Dependent Claim
26 words
Nitrones of the formula given in claim 1, wherein Hal represents a chlorine atom, R1 represents cyclohexyl or t-butyl and R2 represents hydrogen or lower alkyl.
Claim 5
Dependent Claim
26 words
Nitrones of the formula giveN in claim 1, wherein Hal represents a chlorine atom, R1 represents cyclohexyl or t-butyl and R2 represents hydrogen, phenyl or phenylloweralkyl.
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) | 1978-07-07 | 1979-01-06 | 1979-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-07 | 1983-01-06 | 1983-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-07 | 1987-01-06 | 1987-07-08 | $7700.00 | Window Closed / Lapsed |